Merge tag 'usb-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB / Thunderbolt updates from Greg KH:
 "Here is the "big" set of USB and Thunderbolt driver changes for
  5.18-rc1. For the most part it's been a quiet development cycle for
  the USB core, but there are the usual "hot spots" of development
  activity.

  Included in here are:

   - Thunderbolt driver updates:
       - fixes for devices without displayport adapters
       - lane bonding support and improvements
       - other minor changes based on device testing

   - dwc3 gadget driver changes.

     It seems this driver will never be finished given that the IP core
     is showing up in zillions of new devices and each implementation
     decides to do something different with it...

   - uvc gadget driver updates as more devices start to use and rely on
     this hardware as well

   - usb_maxpacket() api changes to remove an unneeded and unused
     parameter.

   - usb-serial driver device id updates and small cleanups

   - typec cleanups and fixes based on device testing

   - device tree updates for usb properties

   - lots of other small fixes and driver updates.

  All of these have been in linux-next for weeks with no reported
  problems"

* tag 'usb-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (154 commits)
  USB: new quirk for Dell Gen 2 devices
  usb: dwc3: core: Add error log when core soft reset failed
  usb: dwc3: gadget: Move null pinter check to proper place
  usb: hub: Simplify error and success path in port_over_current_notify
  usb: cdns3: allocate TX FIFO size according to composite EP number
  usb: dwc3: Fix ep0 handling when getting reset while doing control transfer
  usb: Probe EHCI, OHCI controllers asynchronously
  usb: isp1760: Fix out-of-bounds array access
  xhci: Don't defer primary roothub registration if there is only one roothub
  USB: serial: option: add Quectel BG95 modem
  USB: serial: pl2303: fix type detection for odd device
  xhci: Allow host runtime PM as default for Intel Alder Lake N xHCI
  xhci: Remove quirk for over 10 year old evaluation hardware
  xhci: prevent U2 link power state if Intel tier policy prevented U1
  xhci: use generic command timer for stop endpoint commands.
  usb: host: xhci-plat: omit shared hcd if either root hub has no ports
  usb: host: xhci-plat: prepare operation w/o shared hcd
  usb: host: xhci-plat: create shared hcd after having added main hcd
  xhci: prepare for operation w/o shared hcd
  xhci: factor out parts of xhci_gen_setup()
  ...

102 files changed, 1977 insertions, 1088 deletions

diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index e3a49d837609..362217189ef3 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -1091,7 +1091,7 @@ int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
 			snd_buf_bytes - (snd_buf_bytes % instance->tx_channel.stride));
 
 	/* rx buffer size must be a positive multiple of the endpoint maxpacket */
-	maxpacket = usb_maxpacket(usb_dev, instance->rx_channel.endpoint, 0);
+	maxpacket = usb_maxpacket(usb_dev, instance->rx_channel.endpoint);
 
 	if ((maxpacket < 1) || (maxpacket > UDSL_MAX_BUF_SIZE)) {
 		dev_err(dev, "%s: invalid endpoint %02x!\n", __func__,
diff --git a/drivers/usb/c67x00/c67x00-drv.c b/drivers/usb/c67x00/c67x00-drv.c
index 53838e7d4eef..6db5cb1b2dbb 100644
--- a/drivers/usb/c67x00/c67x00-drv.c
+++ b/drivers/usb/c67x00/c67x00-drv.c
@@ -189,14 +189,12 @@ static int c67x00_drv_remove(struct platform_device *pdev)
 	c67x00_ll_release(c67x00);
 
 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (res)
-		free_irq(res->start, c67x00);
+	free_irq(res->start, c67x00);
 
 	iounmap(c67x00->hpi.base);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res)
-		release_mem_region(res->start, resource_size(res));
+	release_mem_region(res->start, resource_size(res));
 
 	kfree(c67x00);
 
diff --git a/drivers/usb/c67x00/c67x00-sched.c b/drivers/usb/c67x00/c67x00-sched.c
index c7d3e907be81..a09fa68a6ce7 100644
--- a/drivers/usb/c67x00/c67x00-sched.c
+++ b/drivers/usb/c67x00/c67x00-sched.c
@@ -655,7 +655,7 @@ static int c67x00_add_data_urb(struct c67x00_hcd *c67x00, struct urb *urb)
 			       usb_pipeout(urb->pipe));
 	remaining = urb->transfer_buffer_length - urb->actual_length;
 
-	maxps = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+	maxps = usb_maxpacket(urb->dev, urb->pipe);
 
 	need_empty = (urb->transfer_flags & URB_ZERO_PACKET) &&
 	    usb_pipeout(urb->pipe) && !(remaining % maxps);
@@ -866,7 +866,7 @@ static inline int c67x00_end_of_data(struct c67x00_td *td)
 	if (unlikely(!act_bytes))
 		return 1;	/* This was an empty packet */
 
-	maxps = usb_maxpacket(td_udev(td), td->pipe, usb_pipeout(td->pipe));
+	maxps = usb_maxpacket(td_udev(td), td->pipe);
 
 	if (unlikely(act_bytes < maxps))
 		return 1;	/* Smaller then full packet */
diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c
index d6d515d598dc..5c15c48952a6 100644
--- a/drivers/usb/cdns3/cdns3-gadget.c
+++ b/drivers/usb/cdns3/cdns3-gadget.c
@@ -2038,7 +2038,7 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
 	u8 mult = 0;
 	int ret;
 
-	buffering = CDNS3_EP_BUF_SIZE - 1;
+	buffering = priv_dev->ep_buf_size - 1;
 
 	cdns3_configure_dmult(priv_dev, priv_ep);
 
@@ -2057,7 +2057,7 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
 		break;
 	default:
 		ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_ISOC);
-		mult = CDNS3_EP_ISO_HS_MULT - 1;
+		mult = priv_dev->ep_iso_burst - 1;
 		buffering = mult + 1;
 	}
 
@@ -2073,14 +2073,14 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
 		mult = 0;
 		max_packet_size = 1024;
 		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC) {
-			maxburst = CDNS3_EP_ISO_SS_BURST - 1;
+			maxburst = priv_dev->ep_iso_burst - 1;
 			buffering = (mult + 1) *
 				    (maxburst + 1);
 
 			if (priv_ep->interval > 1)
 				buffering++;
 		} else {
-			maxburst = CDNS3_EP_BUF_SIZE - 1;
+			maxburst = priv_dev->ep_buf_size - 1;
 		}
 		break;
 	default:
@@ -2095,6 +2095,10 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable)
 	else
 		priv_ep->trb_burst_size = 16;
 
+	mult = min_t(u8, mult, EP_CFG_MULT_MAX);
+	buffering = min_t(u8, buffering, EP_CFG_BUFFERING_MAX);
+	maxburst = min_t(u8, maxburst, EP_CFG_MAXBURST_MAX);
+
 	/* onchip buffer is only allocated before configuration */
 	if (!priv_dev->hw_configured_flag) {
 		ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering + 1,
@@ -2961,6 +2965,40 @@ static int cdns3_gadget_udc_stop(struct usb_gadget *gadget)
 	return 0;
 }
 
+/**
+ * cdns3_gadget_check_config - ensure cdns3 can support the USB configuration
+ * @gadget: pointer to the USB gadget
+ *
+ * Used to record the maximum number of endpoints being used in a USB composite
+ * device. (across all configurations)  This is to be used in the calculation
+ * of the TXFIFO sizes when resizing internal memory for individual endpoints.
+ * It will help ensured that the resizing logic reserves enough space for at
+ * least one max packet.
+ */
+static int cdns3_gadget_check_config(struct usb_gadget *gadget)
+{
+	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+	struct usb_ep *ep;
+	int n_in = 0;
+	int total;
+
+	list_for_each_entry(ep, &gadget->ep_list, ep_list) {
+		if (ep->claimed && (ep->address & USB_DIR_IN))
+			n_in++;
+	}
+
+	/* 2KB are reserved for EP0, 1KB for out*/
+	total = 2 + n_in + 1;
+
+	if (total > priv_dev->onchip_buffers)
+		return -ENOMEM;
+
+	priv_dev->ep_buf_size = priv_dev->ep_iso_burst =
+			(priv_dev->onchip_buffers - 2) / (n_in + 1);
+
+	return 0;
+}
+
 static const struct usb_gadget_ops cdns3_gadget_ops = {
 	.get_frame = cdns3_gadget_get_frame,
 	.wakeup = cdns3_gadget_wakeup,
@@ -2969,6 +3007,7 @@ static const struct usb_gadget_ops cdns3_gadget_ops = {
 	.udc_start = cdns3_gadget_udc_start,
 	.udc_stop = cdns3_gadget_udc_stop,
 	.match_ep = cdns3_gadget_match_ep,
+	.check_config = cdns3_gadget_check_config,
 };
 
 static void cdns3_free_all_eps(struct cdns3_device *priv_dev)
diff --git a/drivers/usb/cdns3/cdns3-gadget.h b/drivers/usb/cdns3/cdns3-gadget.h
index c5660f2c4293..fbe4a8e3aa89 100644
--- a/drivers/usb/cdns3/cdns3-gadget.h
+++ b/drivers/usb/cdns3/cdns3-gadget.h
@@ -562,15 +562,18 @@ struct cdns3_usb_regs {
 /* Max burst size (used only in SS mode). */
 #define EP_CFG_MAXBURST_MASK	GENMASK(11, 8)
 #define EP_CFG_MAXBURST(p)	(((p) << 8) & EP_CFG_MAXBURST_MASK)
+#define EP_CFG_MAXBURST_MAX	15
 /* ISO max burst. */
 #define EP_CFG_MULT_MASK	GENMASK(15, 14)
 #define EP_CFG_MULT(p)		(((p) << 14) & EP_CFG_MULT_MASK)
+#define EP_CFG_MULT_MAX		2
 /* ISO max burst. */
 #define EP_CFG_MAXPKTSIZE_MASK	GENMASK(26, 16)
 #define EP_CFG_MAXPKTSIZE(p)	(((p) << 16) & EP_CFG_MAXPKTSIZE_MASK)
 /* Max number of buffered packets. */
 #define EP_CFG_BUFFERING_MASK	GENMASK(31, 27)
 #define EP_CFG_BUFFERING(p)	(((p) << 27) & EP_CFG_BUFFERING_MASK)
+#define EP_CFG_BUFFERING_MAX	15
 
 /* EP_CMD - bitmasks */
 /* Endpoint reset. */
@@ -1094,9 +1097,6 @@ struct cdns3_trb {
 #define CDNS3_ENDPOINTS_MAX_COUNT	32
 #define CDNS3_EP_ZLP_BUF_SIZE		1024
 
-#define CDNS3_EP_BUF_SIZE		4	/* KB */
-#define CDNS3_EP_ISO_HS_MULT		3
-#define CDNS3_EP_ISO_SS_BURST		3
 #define CDNS3_MAX_NUM_DESCMISS_BUF	32
 #define CDNS3_DESCMIS_BUF_SIZE		2048	/* Bytes */
 #define CDNS3_WA2_NUM_BUFFERS		128
@@ -1333,6 +1333,9 @@ struct cdns3_device {
 	/*in KB */
 	u16				onchip_buffers;
 	u16				onchip_used_size;
+
+	u16				ep_buf_size;
+	u16				ep_iso_burst;
 };
 
 void cdns3_set_register_bit(void __iomem *ptr, u32 mask);
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index d8b0041de612..2c14a9636056 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -228,8 +228,6 @@ static char *usb_dump_interface(int speed, char *start, char *end,
 
 	start = usb_dump_interface_descriptor(start, end, intfc, iface, setno);
 	for (i = 0; i < desc->desc.bNumEndpoints; i++) {
-		if (start > end)
-			return start;
 		start = usb_dump_endpoint_descriptor(speed,
 				start, end, &desc->endpoint[i].desc);
 	}
@@ -302,8 +300,6 @@ static char *usb_dump_config(int speed, char *start, char *end,
 		intfc = config->intf_cache[i];
 		interface = config->interface[i];
 		for (j = 0; j < intfc->num_altsetting; j++) {
-			if (start > end)
-				return start;
 			start = usb_dump_interface(speed,
 				start, end, intfc, interface, j);
 		}
@@ -369,19 +365,11 @@ static char *usb_dump_desc(char *start, char *end, struct usb_device *dev)
 {
 	int i;
 
-	if (start > end)
-		return start;
-
 	start = usb_dump_device_descriptor(start, end, &dev->descriptor);
 
-	if (start > end)
-		return start;
-
 	start = usb_dump_device_strings(start, end, dev);
 
 	for (i = 0; i < dev->descriptor.bNumConfigurations; i++) {
-		if (start > end)
-			return start;
 		start = usb_dump_config(dev->speed,
 				start, end, dev->config + i,
 				/* active ? */
@@ -390,41 +378,6 @@ static char *usb_dump_desc(char *start, char *end, struct usb_device *dev)
 	return start;
 }
 
-
-#ifdef PROC_EXTRA /* TBD: may want to add this code later */
-
-static char *usb_dump_hub_descriptor(char *start, char *end,
-				     const struct usb_hub_descriptor *desc)
-{
-	int leng = USB_DT_HUB_NONVAR_SIZE;
-	unsigned char *ptr = (unsigned char *)desc;
-
-	if (start > end)
-		return start;
-	start += sprintf(start, "Interface:");
-	while (leng && start <= end) {
-		start += sprintf(start, " %02x", *ptr);
-		ptr++; leng--;
-	}
-	*start++ = '\n';
-	return start;
-}
-
-static char *usb_dump_string(char *start, char *end,
-			     const struct usb_device *dev, char *id, int index)
-{
-	if (start > end)
-		return start;
-	start += sprintf(start, "Interface:");
-	if (index <= dev->maxstring && dev->stringindex &&
-	    dev->stringindex[index])
-		start += sprintf(start, "%s: %.100s ", id,
-				 dev->stringindex[index]);
-	return start;
-}
-
-#endif /* PROC_EXTRA */
-
 /*****************************************************************/
 
 /* This is a recursive function. Parameters:
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 355ed33a2179..b87452e22835 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1533,22 +1533,23 @@ static void choose_wakeup(struct usb_device *udev, pm_message_t msg)
 {
 	int	w;
 
-	/* Remote wakeup is needed only when we actually go to sleep.
-	 * For things like FREEZE and QUIESCE, if the device is already
-	 * autosuspended then its current wakeup setting is okay.
+	/*
+	 * For FREEZE/QUIESCE, disable remote wakeups so no interrupts get
+	 * generated.
 	 */
 	if (msg.event == PM_EVENT_FREEZE || msg.event == PM_EVENT_QUIESCE) {
-		if (udev->state != USB_STATE_SUSPENDED)
-			udev->do_remote_wakeup = 0;
-		return;
-	}
+		w = 0;
 
-	/* Enable remote wakeup if it is allowed, even if no interface drivers
-	 * actually want it.
-	 */
-	w = device_may_wakeup(&udev->dev);
+	} else {
+		/*
+		 * Enable remote wakeup if it is allowed, even if no interface
+		 * drivers actually want it.
+		 */
+		w = device_may_wakeup(&udev->dev);
+	}
 
-	/* If the device is autosuspended with the wrong wakeup setting,
+	/*
+	 * If the device is autosuspended with the wrong wakeup setting,
 	 * autoresume now so the setting can be changed.
 	 */
 	if (udev->state == USB_STATE_SUSPENDED && w != udev->do_remote_wakeup)
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 8176bc81a635..482dae72ef1c 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -15,7 +15,6 @@
 #ifdef CONFIG_PPC_PMAC
 #include <asm/machdep.h>
 #include <asm/pmac_feature.h>
-#include <asm/prom.h>
 #endif
 
 #include "usb.h"
@@ -616,10 +615,10 @@ const struct dev_pm_ops usb_hcd_pci_pm_ops = {
 	.suspend_noirq	= hcd_pci_suspend_noirq,
 	.resume_noirq	= hcd_pci_resume_noirq,
 	.resume		= hcd_pci_resume,
-	.freeze		= check_root_hub_suspended,
+	.freeze		= hcd_pci_suspend,
 	.freeze_noirq	= check_root_hub_suspended,
 	.thaw_noirq	= NULL,
-	.thaw		= NULL,
+	.thaw		= hcd_pci_resume,
 	.poweroff	= hcd_pci_suspend,
 	.poweroff_noirq	= hcd_pci_suspend_noirq,
 	.restore_noirq	= hcd_pci_resume_noirq,
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index d9712c2602af..06eea8848ccc 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2816,6 +2816,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
 {
 	int retval;
 	struct usb_device *rhdev;
+	struct usb_hcd *shared_hcd;
 
 	if (!hcd->skip_phy_initialization && usb_hcd_is_primary_hcd(hcd)) {
 		hcd->phy_roothub = usb_phy_roothub_alloc(hcd->self.sysdev);
@@ -2976,13 +2977,26 @@ int usb_add_hcd(struct usb_hcd *hcd,
 		goto err_hcd_driver_start;
 	}
 
+	/* starting here, usbcore will pay attention to the shared HCD roothub */
+	shared_hcd = hcd->shared_hcd;
+	if (!usb_hcd_is_primary_hcd(hcd) && shared_hcd && HCD_DEFER_RH_REGISTER(shared_hcd)) {
+		retval = register_root_hub(shared_hcd);
+		if (retval != 0)
+			goto err_register_root_hub;
+
+		if (shared_hcd->uses_new_polling && HCD_POLL_RH(shared_hcd))
+			usb_hcd_poll_rh_status(shared_hcd);
+	}
+
 	/* starting here, usbcore will pay attention to this root hub */
-	retval = register_root_hub(hcd);
-	if (retval != 0)
-		goto err_register_root_hub;
+	if (!HCD_DEFER_RH_REGISTER(hcd)) {
+		retval = register_root_hub(hcd);
+		if (retval != 0)
+			goto err_register_root_hub;
 
-	if (hcd->uses_new_polling && HCD_POLL_RH(hcd))
-		usb_hcd_poll_rh_status(hcd);
+		if (hcd->uses_new_polling && HCD_POLL_RH(hcd))
+			usb_hcd_poll_rh_status(hcd);
+	}
 
 	return retval;
 
@@ -3020,6 +3034,7 @@ EXPORT_SYMBOL_GPL(usb_add_hcd);
 void usb_remove_hcd(struct usb_hcd *hcd)
 {
 	struct usb_device *rhdev = hcd->self.root_hub;
+	bool rh_registered;
 
 	dev_info(hcd->self.controller, "remove, state %x\n", hcd->state);
 
@@ -3030,6 +3045,7 @@ void usb_remove_hcd(struct usb_hcd *hcd)
 
 	dev_dbg(hcd->self.controller, "roothub graceful disconnect\n");
 	spin_lock_irq (&hcd_root_hub_lock);
+	rh_registered = hcd->rh_registered;
 	hcd->rh_registered = 0;
 	spin_unlock_irq (&hcd_root_hub_lock);
 
@@ -3039,7 +3055,8 @@ void usb_remove_hcd(struct usb_hcd *hcd)
 	cancel_work_sync(&hcd->died_work);
 
 	mutex_lock(&usb_bus_idr_lock);
-	usb_disconnect(&rhdev);		/* Sets rhdev to NULL */
+	if (rh_registered)
+		usb_disconnect(&rhdev);		/* Sets rhdev to NULL */
 	mutex_unlock(&usb_bus_idr_lock);
 
 	/*
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 1460857026e0..68e9121c1878 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1635,7 +1635,7 @@ static int hub_configure(struct usb_hub *hub,
 	 * maxpktsize is defined in hcd.c's fake endpoint descriptors
 	 * to be big enough for at least USB_MAXCHILDREN ports. */
 	pipe = usb_rcvintpipe(hdev, endpoint->bEndpointAddress);
-	maxp = usb_maxpacket(hdev, pipe, usb_pipeout(pipe));
+	maxp = usb_maxpacket(hdev, pipe);
 
 	if (maxp > sizeof(*hub->buffer))
 		maxp = sizeof(*hub->buffer);
@@ -5511,7 +5511,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
 /* Handle notifying userspace about hub over-current events */
 static void port_over_current_notify(struct usb_port *port_dev)
 {
-	char *envp[3];
+	char *envp[3] = { NULL, NULL, NULL };
 	struct device *hub_dev;
 	char *port_dev_path;
 
@@ -5528,20 +5528,18 @@ static void port_over_current_notify(struct usb_port *port_dev)
 
 	envp[0] = kasprintf(GFP_KERNEL, "OVER_CURRENT_PORT=%s", port_dev_path);
 	if (!envp[0])
-		goto exit_path;
+		goto exit;
 
 	envp[1] = kasprintf(GFP_KERNEL, "OVER_CURRENT_COUNT=%u",
 			port_dev->over_current_count);
 	if (!envp[1])
 		goto exit;
 
-	envp[2] = NULL;
 	kobject_uevent_env(&hub_dev->kobj, KOBJ_CHANGE, envp);
 
-	kfree(envp[1]);
 exit:
+	kfree(envp[1]);
 	kfree(envp[0]);
-exit_path:
 	kfree(port_dev_path);
 }
 
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 97b44a68668a..f99a65a64588 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -510,6 +510,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* DJI CineSSD */
 	{ USB_DEVICE(0x2ca3, 0x0031), .driver_info = USB_QUIRK_NO_LPM },
 
+	/* DELL USB GEN2 */
+	{ USB_DEVICE(0x413c, 0xb062), .driver_info = USB_QUIRK_NO_LPM | USB_QUIRK_RESET_RESUME },
+
 	/* VCOM device */
 	{ USB_DEVICE(0x4296, 0x7570), .driver_info = USB_QUIRK_CONFIG_INTF_STRINGS },
 
diff --git a/drivers/usb/core/usb-acpi.c b/drivers/usb/core/usb-acpi.c
index bb1da35eb891..d4dcaefd0ea4 100644
--- a/drivers/usb/core/usb-acpi.c
+++ b/drivers/usb/core/usb-acpi.c
@@ -205,8 +205,11 @@ usb_acpi_find_companion_for_device(struct usb_device *udev)
 	struct usb_hub *hub;
 
 	if (!udev->parent) {
-		/* root hub is only child (_ADR=0) under its parent, the HC */
-		adev = ACPI_COMPANION(udev->dev.parent);
+		/*
+		 * root hub is only child (_ADR=0) under its parent, the HC.
+		 * sysdev pointer is the HC as seen from firmware.
+		 */
+		adev = ACPI_COMPANION(udev->bus->sysdev);
 		return acpi_find_child_device(adev, 0, false);
 	}
 
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index cf0bcd0dc320..dc4fc72ab1b6 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -1153,6 +1153,7 @@ static void dwc2_set_turnaround_time(struct dwc2_hsotg *hsotg)
 int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 {
 	u32 usbcfg;
+	u32 otgctl;
 	int retval = 0;
 
 	if ((hsotg->params.speed == DWC2_SPEED_PARAM_FULL ||
@@ -1187,6 +1188,14 @@ int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 		dwc2_writel(hsotg, usbcfg, GUSBCFG);
 	}
 
+	if (!hsotg->params.activate_ingenic_overcurrent_detection) {
+		if (dwc2_is_host_mode(hsotg)) {
+			otgctl = readl(hsotg->regs + GOTGCTL);
+			otgctl |= GOTGCTL_VBVALOEN | GOTGCTL_VBVALOVAL;
+			writel(otgctl, hsotg->regs + GOTGCTL);
+		}
+	}
+
 	return retval;
 }
 
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 88c337bf564f..0683852e47e4 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -426,6 +426,10 @@ enum dwc2_ep0_state {
  *			detection using GGPIO register.
  *			0 - Deactivate the external level detection (default)
  *			1 - Activate the external level detection
+ * @activate_ingenic_overcurrent_detection: Activate Ingenic overcurrent
+ *			detection.
+ *			0 - Deactivate the overcurrent detection
+ *			1 - Activate the overcurrent detection (default)
  * @g_dma:              Enables gadget dma usage (default: autodetect).
  * @g_dma_desc:         Enables gadget descriptor DMA (default: autodetect).
  * @g_rx_fifo_size:	The periodic rx fifo size for the device, in
@@ -494,6 +498,7 @@ struct dwc2_core_params {
 	u8 hird_threshold;
 	bool activate_stm_fs_transceiver;
 	bool activate_stm_id_vb_detection;
+	bool activate_ingenic_overcurrent_detection;
 	bool ipg_isoc_en;
 	u16 max_packet_count;
 	u32 max_transfer_size;
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index eee3504397e6..fe2a58c75861 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -4544,7 +4544,6 @@ static int dwc2_hsotg_udc_start(struct usb_gadget *gadget,
 
 	WARN_ON(hsotg->driver);
 
-	driver->driver.bus = NULL;
 	hsotg->driver = driver;
 	hsotg->gadget.dev.of_node = hsotg->dev->of_node;
 	hsotg->gadget.speed = USB_SPEED_UNKNOWN;
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 1306f4ec788d..fdb8a42fff86 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -73,6 +73,47 @@ static void dwc2_set_his_params(struct dwc2_hsotg *hsotg)
 	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
 }
 
+static void dwc2_set_jz4775_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->phy_utmi_width = 16;
+	p->activate_ingenic_overcurrent_detection =
+		!device_property_read_bool(hsotg->dev, "disable-over-current");
+}
+
+static void dwc2_set_x1600_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->host_channels = 16;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->phy_utmi_width = 16;
+	p->activate_ingenic_overcurrent_detection =
+		!device_property_read_bool(hsotg->dev, "disable-over-current");
+}
+
+static void dwc2_set_x2000_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_caps.hnp_support = false;
+	p->speed = DWC2_SPEED_PARAM_HIGH;
+	p->host_rx_fifo_size = 1024;
+	p->host_nperio_tx_fifo_size = 1024;
+	p->host_perio_tx_fifo_size = 1024;
+	p->host_channels = 16;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
+	p->phy_utmi_width = 16;
+	p->activate_ingenic_overcurrent_detection =
+		!device_property_read_bool(hsotg->dev, "disable-over-current");
+}
+
 static void dwc2_set_s3c6400_params(struct dwc2_hsotg *hsotg)
 {
 	struct dwc2_core_params *p = &hsotg->params;
@@ -221,7 +262,14 @@ static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg)
 
 const struct of_device_id dwc2_of_match_table[] = {
 	{ .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
-	{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params  },
+	{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params },
+	{ .compatible = "ingenic,jz4775-otg", .data = dwc2_set_jz4775_params },
+	{ .compatible = "ingenic,jz4780-otg", .data = dwc2_set_jz4775_params },
+	{ .compatible = "ingenic,x1000-otg", .data = dwc2_set_jz4775_params },
+	{ .compatible = "ingenic,x1600-otg", .data = dwc2_set_x1600_params },
+	{ .compatible = "ingenic,x1700-otg", .data = dwc2_set_x1600_params },
+	{ .compatible = "ingenic,x1830-otg", .data = dwc2_set_x1600_params },
+	{ .compatible = "ingenic,x2000-otg", .data = dwc2_set_x2000_params },
 	{ .compatible = "rockchip,rk3066-usb", .data = dwc2_set_rk_params },
 	{ .compatible = "lantiq,arx100-usb", .data = dwc2_set_ltq_params },
 	{ .compatible = "lantiq,xrx200-usb", .data = dwc2_set_ltq_params },
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index c483f28b695d..cd9a734522a7 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -159,4 +159,13 @@ config USB_DWC3_XILINX
 	  This driver handles both ZynqMP and Versal SoC operations.
 	  Say 'Y' or 'M' if you have one such device.
 
+config USB_DWC3_AM62
+	tristate "Texas Instruments AM62 Platforms"
+	depends on ARCH_K3 || COMPILE_TEST
+	default USB_DWC3
+	help
+	  Support TI's AM62 platforms with DesignWare Core USB3 IP.
+	  The Designware Core USB3 IP is progammed to operate in
+	  in USB 2.0 mode only.
+	  Say 'Y' or 'M' here if you have one such device
 endif
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 2d499de6f66a..9f66bd82b639 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -42,6 +42,7 @@ endif
 # and allyesconfig builds.
 ##
 
+obj-$(CONFIG_USB_DWC3_AM62)		+= dwc3-am62.o
 obj-$(CONFIG_USB_DWC3_OMAP)		+= dwc3-omap.o
 obj-$(CONFIG_USB_DWC3_EXYNOS)		+= dwc3-exynos.o
 obj-$(CONFIG_USB_DWC3_PCI)		+= dwc3-pci.o
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index d28cd1a6709b..e027c0420dc3 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -23,6 +23,7 @@
 #include <linux/delay.h>
 #include <linux/dma-mapping.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/acpi.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/reset.h>
@@ -85,7 +86,7 @@ static int dwc3_get_dr_mode(struct dwc3 *dwc)
 		 * mode. If the controller supports DRD but the dr_mode is not
 		 * specified or set to OTG, then set the mode to peripheral.
 		 */
-		if (mode == USB_DR_MODE_OTG &&
+		if (mode == USB_DR_MODE_OTG && !dwc->edev &&
 		    (!IS_ENABLED(CONFIG_USB_ROLE_SWITCH) ||
 		     !device_property_read_bool(dwc->dev, "usb-role-switch")) &&
 		    !DWC3_VER_IS_PRIOR(DWC3, 330A))
@@ -297,6 +298,7 @@ int dwc3_core_soft_reset(struct dwc3 *dwc)
 			udelay(1);
 	} while (--retries);
 
+	dev_warn(dwc->dev, "DWC3 controller soft reset failed.\n");
 	return -ETIMEDOUT;
 
 done:
@@ -342,7 +344,6 @@ static void dwc3_frame_length_adjustment(struct dwc3 *dwc)
  *		from the default, this will set clock period in DWC3_GUCTL
  *		register.
  * @dwc: Pointer to our controller context structure
- * @ref_clk_per: reference clock period in ns
  */
 static void dwc3_ref_clk_period(struct dwc3 *dwc)
 {
@@ -964,10 +965,8 @@ static void dwc3_set_incr_burst_type(struct dwc3 *dwc)
 		return;
 
 	vals = kcalloc(ntype, sizeof(u32), GFP_KERNEL);
-	if (!vals) {
-		dev_err(dev, "Error to get memory\n");
+	if (!vals)
 		return;
-	}
 
 	/* Get INCR burst type, and parse it */
 	ret = device_property_read_u32_array(dev,
@@ -1268,40 +1267,36 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
 
 	if (IS_ERR(dwc->usb2_phy)) {
 		ret = PTR_ERR(dwc->usb2_phy);
-		if (ret == -ENXIO || ret == -ENODEV) {
+		if (ret == -ENXIO || ret == -ENODEV)
 			dwc->usb2_phy = NULL;
-		} else {
+		else
 			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
-		}
 	}
 
 	if (IS_ERR(dwc->usb3_phy)) {
 		ret = PTR_ERR(dwc->usb3_phy);
-		if (ret == -ENXIO || ret == -ENODEV) {
+		if (ret == -ENXIO || ret == -ENODEV)
 			dwc->usb3_phy = NULL;
-		} else {
+		else
 			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
-		}
 	}
 
 	dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
 	if (IS_ERR(dwc->usb2_generic_phy)) {
 		ret = PTR_ERR(dwc->usb2_generic_phy);
-		if (ret == -ENOSYS || ret == -ENODEV) {
+		if (ret == -ENOSYS || ret == -ENODEV)
 			dwc->usb2_generic_phy = NULL;
-		} else {
+		else
 			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
-		}
 	}
 
 	dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
 	if (IS_ERR(dwc->usb3_generic_phy)) {
 		ret = PTR_ERR(dwc->usb3_generic_phy);
-		if (ret == -ENOSYS || ret == -ENODEV) {
+		if (ret == -ENOSYS || ret == -ENODEV)
 			dwc->usb3_generic_phy = NULL;
-		} else {
+		else
 			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
-		}
 	}
 
 	return 0;
@@ -1633,6 +1628,51 @@ static void dwc3_check_params(struct dwc3 *dwc)
 	}
 }
 
+static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
+{
+	struct device *dev = dwc->dev;
+	struct device_node *np_phy;
+	struct extcon_dev *edev = NULL;
+	const char *name;
+
+	if (device_property_read_bool(dev, "extcon"))
+		return extcon_get_edev_by_phandle(dev, 0);
+
+	/*
+	 * Device tree platforms should get extcon via phandle.
+	 * On ACPI platforms, we get the name from a device property.
+	 * This device property is for kernel internal use only and
+	 * is expected to be set by the glue code.
+	 */
+	if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) {
+		edev = extcon_get_extcon_dev(name);
+		if (!edev)
+			return ERR_PTR(-EPROBE_DEFER);
+
+		return edev;
+	}
+
+	/*
+	 * Try to get an extcon device from the USB PHY controller's "port"
+	 * node. Check if it has the "port" node first, to avoid printing the
+	 * error message from underlying code, as it's a valid case: extcon
+	 * device (and "port" node) may be missing in case of "usb-role-switch"
+	 * or OTG mode.
+	 */
+	np_phy = of_parse_phandle(dev->of_node, "phys", 0);
+	if (of_graph_is_present(np_phy)) {
+		struct device_node *np_conn;
+
+		np_conn = of_graph_get_remote_node(np_phy, -1, -1);
+		if (np_conn)
+			edev = extcon_find_edev_by_node(np_conn);
+		of_node_put(np_conn);
+	}
+	of_node_put(np_phy);
+
+	return edev;
+}
+
 static int dwc3_probe(struct platform_device *pdev)
 {
 	struct device		*dev = &pdev->dev;
@@ -1768,6 +1808,13 @@ static int dwc3_probe(struct platform_device *pdev)
 		goto err2;
 	}
 
+	dwc->edev = dwc3_get_extcon(dwc);
+	if (IS_ERR(dwc->edev)) {
+		ret = PTR_ERR(dwc->edev);
+		dev_err_probe(dwc->dev, ret, "failed to get extcon\n");
+		goto err3;
+	}
+
 	ret = dwc3_get_dr_mode(dwc);
 	if (ret)
 		goto err3;
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 5c9d467195a6..81c486b3941c 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -1046,6 +1046,7 @@ struct dwc3_scratchpad_array {
  * @tx_thr_num_pkt_prd: periodic ESS transmit packet count
  * @tx_max_burst_prd: max periodic ESS transmit burst size
  * @tx_fifo_resize_max_num: max number of fifos allocated during txfifo resize
+ * @clear_stall_protocol: endpoint number that requires a delayed status phase
  * @hsphy_interface: "utmi" or "ulpi"
  * @connected: true when we're connected to a host, false otherwise
  * @softconnect: true when gadget connect is called, false when disconnect runs
@@ -1266,6 +1267,7 @@ struct dwc3 {
 	u8			tx_thr_num_pkt_prd;
 	u8			tx_max_burst_prd;
 	u8			tx_fifo_resize_max_num;
+	u8			clear_stall_protocol;
 
 	const char		*hsphy_interface;
 
diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
index 8cad9e7d3368..039bf241769a 100644
--- a/drivers/usb/dwc3/drd.c
+++ b/drivers/usb/dwc3/drd.c
@@ -8,7 +8,6 @@
  */
 
 #include <linux/extcon.h>
-#include <linux/of_graph.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
@@ -439,51 +438,6 @@ static int dwc3_drd_notifier(struct notifier_block *nb,
 	return NOTIFY_DONE;
 }
 
-static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
-{
-	struct device *dev = dwc->dev;
-	struct device_node *np_phy;
-	struct extcon_dev *edev = NULL;
-	const char *name;
-
-	if (device_property_read_bool(dev, "extcon"))
-		return extcon_get_edev_by_phandle(dev, 0);
-
-	/*
-	 * Device tree platforms should get extcon via phandle.
-	 * On ACPI platforms, we get the name from a device property.
-	 * This device property is for kernel internal use only and
-	 * is expected to be set by the glue code.
-	 */
-	if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) {
-		edev = extcon_get_extcon_dev(name);
-		if (!edev)
-			return ERR_PTR(-EPROBE_DEFER);
-
-		return edev;
-	}
-
-	/*
-	 * Try to get an extcon device from the USB PHY controller's "port"
-	 * node. Check if it has the "port" node first, to avoid printing the
-	 * error message from underlying code, as it's a valid case: extcon
-	 * device (and "port" node) may be missing in case of "usb-role-switch"
-	 * or OTG mode.
-	 */
-	np_phy = of_parse_phandle(dev->of_node, "phys", 0);
-	if (of_graph_is_present(np_phy)) {
-		struct device_node *np_conn;
-
-		np_conn = of_graph_get_remote_node(np_phy, -1, -1);
-		if (np_conn)
-			edev = extcon_find_edev_by_node(np_conn);
-		of_node_put(np_conn);
-	}
-	of_node_put(np_phy);
-
-	return edev;
-}
-
 #if IS_ENABLED(CONFIG_USB_ROLE_SWITCH)
 #define ROLE_SWITCH 1
 static int dwc3_usb_role_switch_set(struct usb_role_switch *sw,
@@ -588,10 +542,6 @@ int dwc3_drd_init(struct dwc3 *dwc)
 	    device_property_read_bool(dwc->dev, "usb-role-switch"))
 		return dwc3_setup_role_switch(dwc);
 
-	dwc->edev = dwc3_get_extcon(dwc);
-	if (IS_ERR(dwc->edev))
-		return PTR_ERR(dwc->edev);
-
 	if (dwc->edev) {
 		dwc->edev_nb.notifier_call = dwc3_drd_notifier;
 		ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST,
diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c
new file mode 100644
index 000000000000..fea7aca35dc8
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-am62.c
@@ -0,0 +1,332 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dwc3-am62.c - TI specific Glue layer for AM62 DWC3 USB Controller
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/clk.h>
+#include <linux/regmap.h>
+#include <linux/pinctrl/consumer.h>
+
+/* USB WRAPPER register offsets */
+#define USBSS_PID			0x0
+#define USBSS_OVERCURRENT_CTRL		0x4
+#define USBSS_PHY_CONFIG		0x8
+#define USBSS_PHY_TEST			0xc
+#define USBSS_CORE_STAT			0x14
+#define USBSS_HOST_VBUS_CTRL		0x18
+#define USBSS_MODE_CONTROL		0x1c
+#define USBSS_WAKEUP_CONFIG		0x30
+#define USBSS_WAKEUP_STAT		0x34
+#define USBSS_OVERRIDE_CONFIG		0x38
+#define USBSS_IRQ_MISC_STATUS_RAW	0x430
+#define USBSS_IRQ_MISC_STATUS		0x434
+#define USBSS_IRQ_MISC_ENABLE_SET	0x438
+#define USBSS_IRQ_MISC_ENABLE_CLR	0x43c
+#define USBSS_IRQ_MISC_EOI		0x440
+#define USBSS_INTR_TEST			0x490
+#define USBSS_VBUS_FILTER		0x614
+#define USBSS_VBUS_STAT			0x618
+#define USBSS_DEBUG_CFG			0x708
+#define USBSS_DEBUG_DATA		0x70c
+#define USBSS_HOST_HUB_CTRL		0x714
+
+/* PHY CONFIG register bits */
+#define USBSS_PHY_VBUS_SEL_MASK		GENMASK(2, 1)
+#define USBSS_PHY_VBUS_SEL_SHIFT	1
+#define USBSS_PHY_LANE_REVERSE		BIT(0)
+
+/* MODE CONTROL register bits */
+#define USBSS_MODE_VALID	BIT(0)
+
+/* WAKEUP CONFIG register bits */
+#define USBSS_WAKEUP_CFG_OVERCURRENT_EN	BIT(3)
+#define USBSS_WAKEUP_CFG_LINESTATE_EN	BIT(2)
+#define USBSS_WAKEUP_CFG_SESSVALID_EN	BIT(1)
+#define USBSS_WAKEUP_CFG_VBUSVALID_EN	BIT(0)
+
+/* WAKEUP STAT register bits */
+#define USBSS_WAKEUP_STAT_OVERCURRENT	BIT(4)
+#define USBSS_WAKEUP_STAT_LINESTATE	BIT(3)
+#define USBSS_WAKEUP_STAT_SESSVALID	BIT(2)
+#define USBSS_WAKEUP_STAT_VBUSVALID	BIT(1)
+#define USBSS_WAKEUP_STAT_CLR		BIT(0)
+
+/* IRQ_MISC_STATUS_RAW register bits */
+#define USBSS_IRQ_MISC_RAW_VBUSVALID	BIT(22)
+#define USBSS_IRQ_MISC_RAW_SESSVALID	BIT(20)
+
+/* IRQ_MISC_STATUS register bits */
+#define USBSS_IRQ_MISC_VBUSVALID	BIT(22)
+#define USBSS_IRQ_MISC_SESSVALID	BIT(20)
+
+/* IRQ_MISC_ENABLE_SET register bits */
+#define USBSS_IRQ_MISC_ENABLE_SET_VBUSVALID	BIT(22)
+#define USBSS_IRQ_MISC_ENABLE_SET_SESSVALID	BIT(20)
+
+/* IRQ_MISC_ENABLE_CLR register bits */
+#define USBSS_IRQ_MISC_ENABLE_CLR_VBUSVALID	BIT(22)
+#define USBSS_IRQ_MISC_ENABLE_CLR_SESSVALID	BIT(20)
+
+/* IRQ_MISC_EOI register bits */
+#define USBSS_IRQ_MISC_EOI_VECTOR	BIT(0)
+
+/* VBUS_STAT register bits */
+#define USBSS_VBUS_STAT_SESSVALID	BIT(2)
+#define USBSS_VBUS_STAT_VBUSVALID	BIT(0)
+
+/* Mask for PHY PLL REFCLK */
+#define PHY_PLL_REFCLK_MASK	GENMASK(3, 0)
+
+#define DWC3_AM62_AUTOSUSPEND_DELAY	100
+
+struct dwc3_data {
+	struct device *dev;
+	void __iomem *usbss;
+	struct clk *usb2_refclk;
+	int rate_code;
+	struct regmap *syscon;
+	unsigned int offset;
+	unsigned int vbus_divider;
+};
+
+static const int dwc3_ti_rate_table[] = {	/* in KHZ */
+	9600,
+	10000,
+	12000,
+	19200,
+	20000,
+	24000,
+	25000,
+	26000,
+	38400,
+	40000,
+	58000,
+	50000,
+	52000,
+};
+
+static inline u32 dwc3_ti_readl(struct dwc3_data *data, u32 offset)
+{
+	return readl((data->usbss) + offset);
+}
+
+static inline void dwc3_ti_writel(struct dwc3_data *data, u32 offset, u32 value)
+{
+	writel(value, (data->usbss) + offset);
+}
+
+static int phy_syscon_pll_refclk(struct dwc3_data *data)
+{
+	struct device *dev = data->dev;
+	struct device_node *node = dev->of_node;
+	struct of_phandle_args args;
+	struct regmap *syscon;
+	int ret;
+
+	syscon = syscon_regmap_lookup_by_phandle(node, "ti,syscon-phy-pll-refclk");
+	if (IS_ERR(syscon)) {
+		dev_err(dev, "unable to get ti,syscon-phy-pll-refclk regmap\n");
+		return PTR_ERR(syscon);
+	}
+
+	data->syscon = syscon;
+
+	ret = of_parse_phandle_with_fixed_args(node, "ti,syscon-phy-pll-refclk", 1,
+					       0, &args);
+	if (ret)
+		return ret;
+
+	data->offset = args.args[0];
+
+	ret = regmap_update_bits(data->syscon, data->offset, PHY_PLL_REFCLK_MASK, data->rate_code);
+	if (ret) {
+		dev_err(dev, "failed to set phy pll reference clock rate\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dwc3_ti_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = pdev->dev.of_node;
+	struct dwc3_data *data;
+	int i, ret;
+	unsigned long rate;
+	u32 reg;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->dev = dev;
+	platform_set_drvdata(pdev, data);
+
+	data->usbss = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(data->usbss)) {
+		dev_err(dev, "can't map IOMEM resource\n");
+		return PTR_ERR(data->usbss);
+	}
+
+	data->usb2_refclk = devm_clk_get(dev, "ref");
+	if (IS_ERR(data->usb2_refclk)) {
+		dev_err(dev, "can't get usb2_refclk\n");
+		return PTR_ERR(data->usb2_refclk);
+	}
+
+	/* Calculate the rate code */
+	rate = clk_get_rate(data->usb2_refclk);
+	rate /= 1000;	// To KHz
+	for (i = 0; i < ARRAY_SIZE(dwc3_ti_rate_table); i++) {
+		if (dwc3_ti_rate_table[i] == rate)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(dwc3_ti_rate_table)) {
+		dev_err(dev, "unsupported usb2_refclk rate: %lu KHz\n", rate);
+		ret = -EINVAL;
+		goto err_clk_disable;
+	}
+
+	data->rate_code = i;
+
+	/* Read the syscon property and set the rate code */
+	ret = phy_syscon_pll_refclk(data);
+	if (ret)
+		goto err_clk_disable;
+
+	/* VBUS divider select */
+	data->vbus_divider = device_property_read_bool(dev, "ti,vbus-divider");
+	reg = dwc3_ti_readl(data, USBSS_PHY_CONFIG);
+	if (data->vbus_divider)
+		reg |= 1 << USBSS_PHY_VBUS_SEL_SHIFT;
+
+	dwc3_ti_writel(data, USBSS_PHY_CONFIG, reg);
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	/*
+	 * Don't ignore its dependencies with its children
+	 */
+	pm_suspend_ignore_children(dev, false);
+	clk_prepare_enable(data->usb2_refclk);
+	pm_runtime_get_noresume(dev);
+
+	ret = of_platform_populate(node, NULL, NULL, dev);
+	if (ret) {
+		dev_err(dev, "failed to create dwc3 core: %d\n", ret);
+		goto err_pm_disable;
+	}
+
+	/* Set mode valid bit to indicate role is valid */
+	reg = dwc3_ti_readl(data, USBSS_MODE_CONTROL);
+	reg |= USBSS_MODE_VALID;
+	dwc3_ti_writel(data, USBSS_MODE_CONTROL, reg);
+
+	/* Setting up autosuspend */
+	pm_runtime_set_autosuspend_delay(dev, DWC3_AM62_AUTOSUSPEND_DELAY);
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+	return 0;
+
+err_pm_disable:
+	clk_disable_unprepare(data->usb2_refclk);
+	pm_runtime_disable(dev);
+	pm_runtime_set_suspended(dev);
+err_clk_disable:
+	clk_put(data->usb2_refclk);
+	return ret;
+}
+
+static int dwc3_ti_remove_core(struct device *dev, void *c)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+
+	platform_device_unregister(pdev);
+	return 0;
+}
+
+static int dwc3_ti_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct dwc3_data *data = platform_get_drvdata(pdev);
+	u32 reg;
+
+	device_for_each_child(dev, NULL, dwc3_ti_remove_core);
+
+	/* Clear mode valid bit */
+	reg = dwc3_ti_readl(data, USBSS_MODE_CONTROL);
+	reg &= ~USBSS_MODE_VALID;
+	dwc3_ti_writel(data, USBSS_MODE_CONTROL, reg);
+
+	pm_runtime_put_sync(dev);
+	clk_disable_unprepare(data->usb2_refclk);
+	pm_runtime_disable(dev);
+	pm_runtime_set_suspended(dev);
+
+	clk_put(data->usb2_refclk);
+	platform_set_drvdata(pdev, NULL);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int dwc3_ti_suspend_common(struct device *dev)
+{
+	struct dwc3_data *data = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(data->usb2_refclk);
+
+	return 0;
+}
+
+static int dwc3_ti_resume_common(struct device *dev)
+{
+	struct dwc3_data *data = dev_get_drvdata(dev);
+
+	clk_prepare_enable(data->usb2_refclk);
+
+	return 0;
+}
+
+static UNIVERSAL_DEV_PM_OPS(dwc3_ti_pm_ops, dwc3_ti_suspend_common,
+			    dwc3_ti_resume_common, NULL);
+
+#define DEV_PM_OPS	(&dwc3_ti_pm_ops)
+#else
+#define DEV_PM_OPS	NULL
+#endif /* CONFIG_PM */
+
+static const struct of_device_id dwc3_ti_of_match[] = {
+	{ .compatible = "ti,am62-usb"},
+	{},
+};
+MODULE_DEVICE_TABLE(of, dwc3_ti_of_match);
+
+static struct platform_driver dwc3_ti_driver = {
+	.probe		= dwc3_ti_probe,
+	.remove		= dwc3_ti_remove,
+	.driver		= {
+		.name	= "dwc3-am62",
+		.pm	= DEV_PM_OPS,
+		.of_match_table = dwc3_ti_of_match,
+	},
+};
+
+module_platform_driver(dwc3_ti_driver);
+
+MODULE_ALIAS("platform:dwc3-am62");
+MODULE_AUTHOR("Aswath Govindraju <a-govindraju@ti.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("DesignWare USB3 TI Glue Layer");
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 2e19e0e4ea53..ba51de7dd760 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -288,7 +288,7 @@ static void dwc3_pci_resume_work(struct work_struct *work)
 	int ret;
 
 	ret = pm_runtime_get_sync(&dwc3->dev);
-	if (ret) {
+	if (ret < 0) {
 		pm_runtime_put_sync_autosuspend(&dwc3->dev);
 		return;
 	}
diff --git a/drivers/usb/dwc3/dwc3-xilinx.c b/drivers/usb/dwc3/dwc3-xilinx.c
index a6f3a9b38789..67b237c7a76a 100644
--- a/drivers/usb/dwc3/dwc3-xilinx.c
+++ b/drivers/usb/dwc3/dwc3-xilinx.c
@@ -13,6 +13,7 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
+#include <linux/of_gpio.h>
 #include <linux/of_platform.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>
@@ -98,6 +99,7 @@ static int dwc3_xlnx_init_zynqmp(struct dwc3_xlnx *priv_data)
 {
 	struct device		*dev = priv_data->dev;
 	struct reset_control	*crst, *hibrst, *apbrst;
+	struct gpio_desc	*reset_gpio;
 	struct phy		*usb3_phy;
 	int			ret = 0;
 	u32			reg;
@@ -201,6 +203,21 @@ static int dwc3_xlnx_init_zynqmp(struct dwc3_xlnx *priv_data)
 	}
 
 skip_usb3_phy:
+	/* ulpi reset via gpio-modepin or gpio-framework driver */
+	reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(reset_gpio)) {
+		return dev_err_probe(dev, PTR_ERR(reset_gpio),
+				     "Failed to request reset GPIO\n");
+	}
+
+	if (reset_gpio) {
+		/* Toggle ulpi to reset the phy. */
+		gpiod_set_value_cansleep(reset_gpio, 1);
+		usleep_range(5000, 10000);
+		gpiod_set_value_cansleep(reset_gpio, 0);
+		usleep_range(5000, 10000);
+	}
+
 	/*
 	 * This routes the USB DMA traffic to go through FPD path instead
 	 * of reaching DDR directly. This traffic routing is needed to
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 1064be5518f6..5d642660fd15 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -218,7 +218,7 @@ out:
 	return ret;
 }
 
-static void dwc3_ep0_stall_and_restart(struct dwc3 *dwc)
+void dwc3_ep0_stall_and_restart(struct dwc3 *dwc)
 {
 	struct dwc3_ep		*dep;
 
@@ -813,7 +813,7 @@ static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
 	int ret = -EINVAL;
 	u32 len;
 
-	if (!dwc->gadget_driver)
+	if (!dwc->gadget_driver || !dwc->connected)
 		goto out;
 
 	trace_dwc3_ctrl_req(ctrl);
@@ -1080,6 +1080,7 @@ void dwc3_ep0_send_delayed_status(struct dwc3 *dwc)
 	unsigned int direction = !dwc->ep0_expect_in;
 
 	dwc->delayed_status = false;
+	dwc->clear_stall_protocol = 0;
 
 	if (dwc->ep0state != EP0_STATUS_PHASE)
 		return;
@@ -1087,13 +1088,18 @@ void dwc3_ep0_send_delayed_status(struct dwc3 *dwc)
 	__dwc3_ep0_do_control_status(dwc, dwc->eps[direction]);
 }
 
-static void dwc3_ep0_end_control_data(struct dwc3 *dwc, struct dwc3_ep *dep)
+void dwc3_ep0_end_control_data(struct dwc3 *dwc, struct dwc3_ep *dep)
 {
 	struct dwc3_gadget_ep_cmd_params params;
 	u32			cmd;
 	int			ret;
 
-	if (!dep->resource_index)
+	/*
+	 * For status/DATA OUT stage, TRB will be queued on ep0 out
+	 * endpoint for which resource index is zero. Hence allow
+	 * queuing ENDXFER command for ep0 out endpoint.
+	 */
+	if (!dep->resource_index && dep->number)
 		return;
 
 	cmd = DWC3_DEPCMD_ENDTRANSFER;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 0b9c2493844a..00427d108ab9 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -657,7 +657,6 @@ static int dwc3_gadget_set_ep_config(struct dwc3_ep *dep, unsigned int action)
 /**
  * dwc3_gadget_calc_tx_fifo_size - calculates the txfifo size value
  * @dwc: pointer to the DWC3 context
- * @nfifos: number of fifos to calculate for
  *
  * Calculates the size value based on the equation below:
  *
@@ -690,7 +689,7 @@ static int dwc3_gadget_calc_tx_fifo_size(struct dwc3 *dwc, int mult)
 }
 
 /**
- * dwc3_gadget_clear_tx_fifo_size - Clears txfifo allocation
+ * dwc3_gadget_clear_tx_fifos - Clears txfifo allocation
  * @dwc: pointer to the DWC3 context
  *
  * Iterates through all the endpoint registers and clears the previous txfifo
@@ -783,7 +782,8 @@ static int dwc3_gadget_resize_tx_fifos(struct dwc3_ep *dep)
 		num_fifos = 3;
 
 	if (dep->endpoint.maxburst > 6 &&
-	    usb_endpoint_xfer_bulk(dep->endpoint.desc) && DWC3_IP_IS(DWC31))
+	    (usb_endpoint_xfer_bulk(dep->endpoint.desc) ||
+	     usb_endpoint_xfer_isoc(dep->endpoint.desc)) && DWC3_IP_IS(DWC31))
 		num_fifos = dwc->tx_fifo_resize_max_num;
 
 	/* FIFO size for a single buffer */
@@ -882,12 +882,13 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
 		reg |= DWC3_DALEPENA_EP(dep->number);
 		dwc3_writel(dwc->regs, DWC3_DALEPENA, reg);
 
+		dep->trb_dequeue = 0;
+		dep->trb_enqueue = 0;
+
 		if (usb_endpoint_xfer_control(desc))
 			goto out;
 
 		/* Initialize the TRB ring */
-		dep->trb_dequeue = 0;
-		dep->trb_enqueue = 0;
 		memset(dep->trb_pool, 0,
 		       sizeof(struct dwc3_trb) * DWC3_TRB_NUM);
 
@@ -2001,10 +2002,10 @@ static void dwc3_gadget_ep_skip_trbs(struct dwc3_ep *dep, struct dwc3_request *r
 static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep)
 {
 	struct dwc3_request		*req;
-	struct dwc3_request		*tmp;
 	struct dwc3			*dwc = dep->dwc;
 
-	list_for_each_entry_safe(req, tmp, &dep->cancelled_list, list) {
+	while (!list_empty(&dep->cancelled_list)) {
+		req = next_request(&dep->cancelled_list);
 		dwc3_gadget_ep_skip_trbs(dep, req);
 		switch (req->status) {
 		case DWC3_REQUEST_STATUS_DISCONNECTED:
@@ -2021,6 +2022,12 @@ static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep)
 			dwc3_gadget_giveback(dep, req, -ECONNRESET);
 			break;
 		}
+		/*
+		 * The endpoint is disabled, let the dwc3_remove_requests()
+		 * handle the cleanup.
+		 */
+		if (!dep->endpoint.desc)
+			break;
 	}
 }
 
@@ -2056,16 +2063,6 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
 		if (r == req) {
 			struct dwc3_request *t;
 
-			/*
-			 * If a Setup packet is received but yet to DMA out, the controller will
-			 * not process the End Transfer command of any endpoint. Polling of its
-			 * DEPCMD.CmdAct may block setting up TRB for Setup packet, causing a
-			 * timeout. Delay issuing the End Transfer command until the Setup TRB is
-			 * prepared.
-			 */
-			if (dwc->ep0state != EP0_SETUP_PHASE && !dwc->delayed_status)
-				dep->flags |= DWC3_EP_DELAY_STOP;
-
 			/* wait until it is processed */
 			dwc3_stop_active_transfer(dep, true, true);
 
@@ -2152,6 +2149,9 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
 		if (dep->flags & DWC3_EP_END_TRANSFER_PENDING ||
 		    (dep->flags & DWC3_EP_DELAY_STOP)) {
 			dep->flags |= DWC3_EP_PENDING_CLEAR_STALL;
+			if (protocol)
+				dwc->clear_stall_protocol = dep->number;
+
 			return 0;
 		}
 
@@ -2498,28 +2498,64 @@ static void dwc3_gadget_disable_irq(struct dwc3 *dwc);
 static void __dwc3_gadget_stop(struct dwc3 *dwc);
 static int __dwc3_gadget_start(struct dwc3 *dwc);
 
-static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
+static int dwc3_gadget_soft_disconnect(struct dwc3 *dwc)
 {
-	struct dwc3		*dwc = gadget_to_dwc(g);
-	unsigned long		flags;
-	int			ret;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dwc->lock, flags);
+	dwc->connected = false;
 
-	is_on = !!is_on;
-	dwc->softconnect = is_on;
 	/*
 	 * Per databook, when we want to stop the gadget, if a control transfer
 	 * is still in process, complete it and get the core into setup phase.
 	 */
-	if (!is_on && dwc->ep0state != EP0_SETUP_PHASE) {
+	if (dwc->ep0state != EP0_SETUP_PHASE) {
+		int ret;
+
 		reinit_completion(&dwc->ep0_in_setup);
 
+		spin_unlock_irqrestore(&dwc->lock, flags);
 		ret = wait_for_completion_timeout(&dwc->ep0_in_setup,
 				msecs_to_jiffies(DWC3_PULL_UP_TIMEOUT));
+		spin_lock_irqsave(&dwc->lock, flags);
 		if (ret == 0)
 			dev_warn(dwc->dev, "timed out waiting for SETUP phase\n");
 	}
 
 	/*
+	 * In the Synopsys DesignWare Cores USB3 Databook Rev. 3.30a
+	 * Section 4.1.8 Table 4-7, it states that for a device-initiated
+	 * disconnect, the SW needs to ensure that it sends "a DEPENDXFER
+	 * command for any active transfers" before clearing the RunStop
+	 * bit.
+	 */
+	dwc3_stop_active_transfers(dwc);
+	__dwc3_gadget_stop(dwc);
+	spin_unlock_irqrestore(&dwc->lock, flags);
+
+	/*
+	 * Note: if the GEVNTCOUNT indicates events in the event buffer, the
+	 * driver needs to acknowledge them before the controller can halt.
+	 * Simply let the interrupt handler acknowledges and handle the
+	 * remaining event generated by the controller while polling for
+	 * DSTS.DEVCTLHLT.
+	 */
+	return dwc3_gadget_run_stop(dwc, false, false);
+}
+
+static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
+{
+	struct dwc3		*dwc = gadget_to_dwc(g);
+	int			ret;
+
+	is_on = !!is_on;
+
+	if (dwc->pullups_connected == is_on)
+		return 0;
+
+	dwc->softconnect = is_on;
+
+	/*
 	 * Avoid issuing a runtime resume if the device is already in the
 	 * suspended state during gadget disconnect.  DWC3 gadget was already
 	 * halted/stopped during runtime suspend.
@@ -2541,42 +2577,8 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
 		return 0;
 	}
 
-	/*
-	 * Synchronize and disable any further event handling while controller
-	 * is being enabled/disabled.
-	 */
-	disable_irq(dwc->irq_gadget);
-
-	spin_lock_irqsave(&dwc->lock, flags);
-
 	if (!is_on) {
-		u32 count;
-
-		dwc->connected = false;
-		/*
-		 * In the Synopsis DesignWare Cores USB3 Databook Rev. 3.30a
-		 * Section 4.1.8 Table 4-7, it states that for a device-initiated
-		 * disconnect, the SW needs to ensure that it sends "a DEPENDXFER
-		 * command for any active transfers" before clearing the RunStop
-		 * bit.
-		 */
-		dwc3_stop_active_transfers(dwc);
-		__dwc3_gadget_stop(dwc);
-
-		/*
-		 * In the Synopsis DesignWare Cores USB3 Databook Rev. 3.30a
-		 * Section 1.3.4, it mentions that for the DEVCTRLHLT bit, the
-		 * "software needs to acknowledge the events that are generated
-		 * (by writing to GEVNTCOUNTn) while it is waiting for this bit
-		 * to be set to '1'."
-		 */
-		count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0));
-		count &= DWC3_GEVNTCOUNT_MASK;
-		if (count > 0) {
-			dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), count);
-			dwc->ev_buf->lpos = (dwc->ev_buf->lpos + count) %
-						dwc->ev_buf->length;
-		}
+		ret = dwc3_gadget_soft_disconnect(dwc);
 	} else {
 		/*
 		 * In the Synopsys DWC_usb31 1.90a programming guide section
@@ -2584,18 +2586,13 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
 		 * device-initiated disconnect requires a core soft reset
 		 * (DCTL.CSftRst) before enabling the run/stop bit.
 		 */
-		spin_unlock_irqrestore(&dwc->lock, flags);
 		dwc3_core_soft_reset(dwc);
-		spin_lock_irqsave(&dwc->lock, flags);
 
 		dwc3_event_buffers_setup(dwc);
 		__dwc3_gadget_start(dwc);
+		ret = dwc3_gadget_run_stop(dwc, true, false);
 	}
 
-	ret = dwc3_gadget_run_stop(dwc, is_on, false);
-	spin_unlock_irqrestore(&dwc->lock, flags);
-	enable_irq(dwc->irq_gadget);
-
 	pm_runtime_put(dwc->dev);
 
 	return ret;
@@ -2745,6 +2742,7 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
 
 	/* begin to receive SETUP packets */
 	dwc->ep0state = EP0_SETUP_PHASE;
+	dwc->ep0_bounced = false;
 	dwc->link_state = DWC3_LINK_STATE_SS_DIS;
 	dwc->delayed_status = false;
 	dwc3_ep0_out_start(dwc);
@@ -3333,15 +3331,21 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep,
 		const struct dwc3_event_depevt *event, int status)
 {
 	struct dwc3_request	*req;
-	struct dwc3_request	*tmp;
 
-	list_for_each_entry_safe(req, tmp, &dep->started_list, list) {
+	while (!list_empty(&dep->started_list)) {
 		int ret;
 
+		req = next_request(&dep->started_list);
 		ret = dwc3_gadget_ep_cleanup_completed_request(dep, event,
 				req, status);
 		if (ret)
 			break;
+		/*
+		 * The endpoint is disabled, let the dwc3_remove_requests()
+		 * handle the cleanup.
+		 */
+		if (!dep->endpoint.desc)
+			break;
 	}
 }
 
@@ -3380,14 +3384,14 @@ static bool dwc3_gadget_endpoint_trbs_complete(struct dwc3_ep *dep,
 	struct dwc3		*dwc = dep->dwc;
 	bool			no_started_trb = true;
 
-	if (!dep->endpoint.desc)
-		return no_started_trb;
-
 	dwc3_gadget_ep_cleanup_completed_requests(dep, event, status);
 
 	if (dep->flags & DWC3_EP_END_TRANSFER_PENDING)
 		goto out;
 
+	if (!dep->endpoint.desc)
+		return no_started_trb;
+
 	if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
 		list_empty(&dep->started_list) &&
 		(list_empty(&dep->pending_list) || status == -EXDEV))
@@ -3512,7 +3516,7 @@ static void dwc3_gadget_endpoint_command_complete(struct dwc3_ep *dep,
 		}
 
 		dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);
-		if (dwc->delayed_status)
+		if (dwc->clear_stall_protocol == dep->number)
 			dwc3_ep0_send_delayed_status(dwc);
 	}
 
@@ -3673,12 +3677,35 @@ static void dwc3_reset_gadget(struct dwc3 *dwc)
 void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force,
 	bool interrupt)
 {
+	struct dwc3 *dwc = dep->dwc;
+
+	/*
+	 * Only issue End Transfer command to the control endpoint of a started
+	 * Data Phase. Typically we should only do so in error cases such as
+	 * invalid/unexpected direction as described in the control transfer
+	 * flow of the programming guide.
+	 */
+	if (dep->number <= 1 && dwc->ep0state != EP0_DATA_PHASE)
+		return;
+
 	if (!(dep->flags & DWC3_EP_TRANSFER_STARTED) ||
 	    (dep->flags & DWC3_EP_DELAY_STOP) ||
 	    (dep->flags & DWC3_EP_END_TRANSFER_PENDING))
 		return;
 
 	/*
+	 * If a Setup packet is received but yet to DMA out, the controller will
+	 * not process the End Transfer command of any endpoint. Polling of its
+	 * DEPCMD.CmdAct may block setting up TRB for Setup packet, causing a
+	 * timeout. Delay issuing the End Transfer command until the Setup TRB is
+	 * prepared.
+	 */
+	if (dwc->ep0state != EP0_SETUP_PHASE && !dwc->delayed_status) {
+		dep->flags |= DWC3_EP_DELAY_STOP;
+		return;
+	}
+
+	/*
 	 * NOTICE: We are violating what the Databook says about the
 	 * EndTransfer command. Ideally we would _always_ wait for the
 	 * EndTransfer Command Completion IRQ, but that's causing too
@@ -3795,6 +3822,27 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
 	}
 
 	dwc3_reset_gadget(dwc);
+
+	/*
+	 * From SNPS databook section 8.1.2, the EP0 should be in setup
+	 * phase. So ensure that EP0 is in setup phase by issuing a stall
+	 * and restart if EP0 is not in setup phase.
+	 */
+	if (dwc->ep0state != EP0_SETUP_PHASE) {
+		unsigned int	dir;
+
+		dir = !!dwc->ep0_expect_in;
+		if (dwc->ep0state == EP0_DATA_PHASE)
+			dwc3_ep0_end_control_data(dwc, dwc->eps[dir]);
+		else
+			dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]);
+
+		dwc->eps[0]->trb_enqueue = 0;
+		dwc->eps[1]->trb_enqueue = 0;
+
+		dwc3_ep0_stall_and_restart(dwc);
+	}
+
 	/*
 	 * In the Synopsis DesignWare Cores USB3 Databook Rev. 3.30a
 	 * Section 4.1.2 Table 4-2, it states that during a USB reset, the SW
diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h
index f763380e672e..55a56cf67d73 100644
--- a/drivers/usb/dwc3/gadget.h
+++ b/drivers/usb/dwc3/gadget.h
@@ -110,6 +110,8 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
 void dwc3_ep0_interrupt(struct dwc3 *dwc,
 		const struct dwc3_event_depevt *event);
 void dwc3_ep0_out_start(struct dwc3 *dwc);
+void dwc3_ep0_end_control_data(struct dwc3 *dwc, struct dwc3_ep *dep);
+void dwc3_ep0_stall_and_restart(struct dwc3 *dwc);
 int __dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
 int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
 int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index eda871973d6c..f56c30cf151e 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -7,7 +7,6 @@
  * Authors: Felipe Balbi <balbi@ti.com>,
  */
 
-#include <linux/acpi.h>
 #include <linux/irq.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
@@ -83,7 +82,6 @@ int dwc3_host_init(struct dwc3 *dwc)
 	}
 
 	xhci->dev.parent	= dwc->dev;
-	ACPI_COMPANION_SET(&xhci->dev, ACPI_COMPANION(dwc->dev));
 
 	dwc->xhci = xhci;
 
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 2eaeaae96759..403563c06477 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -2505,7 +2505,7 @@ int usb_composite_probe(struct usb_composite_driver *driver)
 	gadget_driver->driver.name = driver->name;
 	gadget_driver->max_speed = driver->max_speed;
 
-	return usb_gadget_probe_driver(gadget_driver);
+	return usb_gadget_register_driver(gadget_driver);
 }
 EXPORT_SYMBOL_GPL(usb_composite_probe);
 
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index 84b73cb03f87..3a6b4926193e 100644
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -284,7 +284,7 @@ static ssize_t gadget_dev_desc_UDC_store(struct config_item *item,
 			goto err;
 		}
 		gi->composite.gadget_driver.udc_name = name;
-		ret = usb_gadget_probe_driver(&gi->composite.gadget_driver);
+		ret = usb_gadget_register_driver(&gi->composite.gadget_driver);
 		if (ret) {
 			gi->composite.gadget_driver.udc_name = NULL;
 			goto err;
diff --git a/drivers/usb/gadget/function/f_acm.c b/drivers/usb/gadget/function/f_acm.c
index 349945e064bb..411eb489e0ff 100644
--- a/drivers/usb/gadget/function/f_acm.c
+++ b/drivers/usb/gadget/function/f_acm.c
@@ -333,6 +333,8 @@ static void acm_complete_set_line_coding(struct usb_ep *ep,
 	}
 }
 
+static int acm_send_break(struct gserial *port, int duration);
+
 static int acm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 {
 	struct f_acm		*acm = func_to_acm(f);
@@ -391,6 +393,14 @@ static int acm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 		acm->port_handshake_bits = w_value;
 		break;
 
+	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+			| USB_CDC_REQ_SEND_BREAK:
+		if (w_index != acm->ctrl_id)
+			goto invalid;
+
+		acm_send_break(&acm->port, w_value);
+		break;
+
 	default:
 invalid:
 		dev_vdbg(&cdev->gadget->dev,
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index d37965867b23..d3feeeb50841 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -24,7 +24,6 @@
 #include <media/v4l2-dev.h>
 #include <media/v4l2-event.h>
 
-#include "u_uvc.h"
 #include "uvc.h"
 #include "uvc_configfs.h"
 #include "uvc_v4l2.h"
@@ -44,7 +43,7 @@ MODULE_PARM_DESC(trace, "Trace level bitmask");
 #define UVC_STRING_STREAMING_IDX		1
 
 static struct usb_string uvc_en_us_strings[] = {
-	[UVC_STRING_CONTROL_IDX].s = "UVC Camera",
+	/* [UVC_STRING_CONTROL_IDX].s = DYNAMIC, */
 	[UVC_STRING_STREAMING_IDX].s = "Video Streaming",
 	{  }
 };
@@ -676,6 +675,7 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
 	uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
 	uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address;
 
+	uvc_en_us_strings[UVC_STRING_CONTROL_IDX].s = opts->function_name;
 	us = usb_gstrings_attach(cdev, uvc_function_strings,
 				 ARRAY_SIZE(uvc_en_us_strings));
 	if (IS_ERR(us)) {
@@ -866,6 +866,7 @@ static struct usb_function_instance *uvc_alloc_inst(void)
 
 	opts->streaming_interval = 1;
 	opts->streaming_maxpacket = 1024;
+	snprintf(opts->function_name, sizeof(opts->function_name), "UVC Camera");
 
 	ret = uvcg_attach_configfs(opts);
 	if (ret < 0) {
diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c
index 2bb569895a90..c1f62e91b012 100644
--- a/drivers/usb/gadget/function/u_audio.c
+++ b/drivers/usb/gadget/function/u_audio.c
@@ -1179,8 +1179,8 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
 	if (c_chmask) {
 		struct uac_rtd_params *prm = &uac->c_prm;
 
-    spin_lock_init(&prm->lock);
-    uac->c_prm.uac = uac;
+		spin_lock_init(&prm->lock);
+		uac->c_prm.uac = uac;
 		prm->max_psize = g_audio->out_ep_maxpsize;
 		prm->srate = params->c_srates[0];
 
diff --git a/drivers/usb/gadget/function/u_uvc.h b/drivers/usb/gadget/function/u_uvc.h
index 9a01a7d4f17f..24b8681b0d6f 100644
--- a/drivers/usb/gadget/function/u_uvc.h
+++ b/drivers/usb/gadget/function/u_uvc.h
@@ -27,6 +27,7 @@ struct f_uvc_opts {
 
 	unsigned int					control_interface;
 	unsigned int					streaming_interface;
+	char						function_name[32];
 
 	/*
 	 * Control descriptors array pointers for full-/high-speed and
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h
index 886103a1fe9b..58e383afdd44 100644
--- a/drivers/usb/gadget/function/uvc.h
+++ b/drivers/usb/gadget/function/uvc.h
@@ -80,6 +80,7 @@ struct uvc_request {
 	struct uvc_video *video;
 	struct sg_table sgt;
 	u8 header[UVCG_REQUEST_HEADER_LEN];
+	struct uvc_buffer *last_buf;
 };
 
 struct uvc_video {
diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c
index 77d64031aa9c..e5a6b6e36b3d 100644
--- a/drivers/usb/gadget/function/uvc_configfs.c
+++ b/drivers/usb/gadget/function/uvc_configfs.c
@@ -10,17 +10,14 @@
  * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  */
 
-#include <linux/sort.h>
-
-#include "u_uvc.h"
 #include "uvc_configfs.h"
 
+#include <linux/sort.h>
+
 /* -----------------------------------------------------------------------------
  * Global Utility Structures and Macros
  */
 
-#define UVCG_STREAMING_CONTROL_SIZE	1
-
 #define UVC_ATTR(prefix, cname, aname) \
 static struct configfs_attribute prefix##attr_##cname = { \
 	.ca_name	= __stringify(aname),				\
@@ -49,12 +46,6 @@ static int uvcg_config_compare_u32(const void *l, const void *r)
 	return li < ri ? -1 : li == ri ? 0 : 1;
 }
 
-static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item)
-{
-	return container_of(to_config_group(item), struct f_uvc_opts,
-			    func_inst.group);
-}
-
 struct uvcg_config_group_type {
 	struct config_item_type type;
 	const char *name;
@@ -125,19 +116,6 @@ static void uvcg_config_remove_children(struct config_group *group)
  * control/header
  */
 
-DECLARE_UVC_HEADER_DESCRIPTOR(1);
-
-struct uvcg_control_header {
-	struct config_item		item;
-	struct UVC_HEADER_DESCRIPTOR(1)	desc;
-	unsigned			linked;
-};
-
-static struct uvcg_control_header *to_uvcg_control_header(struct config_item *item)
-{
-	return container_of(item, struct uvcg_control_header, item);
-}
-
 #define UVCG_CTRL_HDR_ATTR(cname, aname, bits, limit)			\
 static ssize_t uvcg_control_header_##cname##_show(			\
 	struct config_item *item, char *page)				\
@@ -769,24 +747,6 @@ static const char * const uvcg_format_names[] = {
 	"mjpeg",
 };
 
-enum uvcg_format_type {
-	UVCG_UNCOMPRESSED = 0,
-	UVCG_MJPEG,
-};
-
-struct uvcg_format {
-	struct config_group	group;
-	enum uvcg_format_type	type;
-	unsigned		linked;
-	unsigned		num_frames;
-	__u8			bmaControls[UVCG_STREAMING_CONTROL_SIZE];
-};
-
-static struct uvcg_format *to_uvcg_format(struct config_item *item)
-{
-	return container_of(to_config_group(item), struct uvcg_format, group);
-}
-
 static ssize_t uvcg_format_bma_controls_show(struct uvcg_format *f, char *page)
 {
 	struct f_uvc_opts *opts;
@@ -845,29 +805,11 @@ end:
 	return ret;
 }
 
-struct uvcg_format_ptr {
-	struct uvcg_format	*fmt;
-	struct list_head	entry;
-};
-
 /* -----------------------------------------------------------------------------
  * streaming/header/<NAME>
  * streaming/header
  */
 
-struct uvcg_streaming_header {
-	struct config_item				item;
-	struct uvc_input_header_descriptor		desc;
-	unsigned					linked;
-	struct list_head				formats;
-	unsigned					num_fmt;
-};
-
-static struct uvcg_streaming_header *to_uvcg_streaming_header(struct config_item *item)
-{
-	return container_of(item, struct uvcg_streaming_header, item);
-}
-
 static void uvcg_format_set_indices(struct config_group *fmt);
 
 static int uvcg_streaming_header_allow_link(struct config_item *src,
@@ -1059,31 +1001,6 @@ static const struct uvcg_config_group_type uvcg_streaming_header_grp_type = {
  * streaming/<mode>/<format>/<NAME>
  */
 
-struct uvcg_frame {
-	struct config_item	item;
-	enum uvcg_format_type	fmt_type;
-	struct {
-		u8	b_length;
-		u8	b_descriptor_type;
-		u8	b_descriptor_subtype;
-		u8	b_frame_index;
-		u8	bm_capabilities;
-		u16	w_width;
-		u16	w_height;
-		u32	dw_min_bit_rate;
-		u32	dw_max_bit_rate;
-		u32	dw_max_video_frame_buffer_size;
-		u32	dw_default_frame_interval;
-		u8	b_frame_interval_type;
-	} __attribute__((packed)) frame;
-	u32 *dw_frame_interval;
-};
-
-static struct uvcg_frame *to_uvcg_frame(struct config_item *item)
-{
-	return container_of(item, struct uvcg_frame, item);
-}
-
 #define UVCG_FRAME_ATTR(cname, aname, bits) \
 static ssize_t uvcg_frame_##cname##_show(struct config_item *item, char *page)\
 {									\
@@ -1345,6 +1262,7 @@ static struct config_item *uvcg_frame_make(struct config_group *group,
 	struct uvcg_format *fmt;
 	struct f_uvc_opts *opts;
 	struct config_item *opts_item;
+	struct uvcg_frame_ptr *frame_ptr;
 
 	h = kzalloc(sizeof(*h), GFP_KERNEL);
 	if (!h)
@@ -1375,6 +1293,16 @@ static struct config_item *uvcg_frame_make(struct config_group *group,
 		kfree(h);
 		return ERR_PTR(-EINVAL);
 	}
+
+	frame_ptr = kzalloc(sizeof(*frame_ptr), GFP_KERNEL);
+	if (!frame_ptr) {
+		mutex_unlock(&opts->lock);
+		kfree(h);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	frame_ptr->frm = h;
+	list_add_tail(&frame_ptr->entry, &fmt->frames);
 	++fmt->num_frames;
 	mutex_unlock(&opts->lock);
 
@@ -1388,13 +1316,23 @@ static void uvcg_frame_drop(struct config_group *group, struct config_item *item
 	struct uvcg_format *fmt;
 	struct f_uvc_opts *opts;
 	struct config_item *opts_item;
+	struct uvcg_frame *target_frm = NULL;
+	struct uvcg_frame_ptr *frame_ptr, *tmp;
 
 	opts_item = group->cg_item.ci_parent->ci_parent->ci_parent;
 	opts = to_f_uvc_opts(opts_item);
 
 	mutex_lock(&opts->lock);
+	target_frm = container_of(item, struct uvcg_frame, item);
 	fmt = to_uvcg_format(&group->cg_item);
-	--fmt->num_frames;
+
+	list_for_each_entry_safe(frame_ptr, tmp, &fmt->frames, entry)
+		if (frame_ptr->frm == target_frm) {
+			list_del(&frame_ptr->entry);
+			kfree(frame_ptr);
+			--fmt->num_frames;
+			break;
+		}
 	mutex_unlock(&opts->lock);
 
 	config_item_put(item);
@@ -1420,18 +1358,6 @@ static void uvcg_format_set_indices(struct config_group *fmt)
  * streaming/uncompressed/<NAME>
  */
 
-struct uvcg_uncompressed {
-	struct uvcg_format		fmt;
-	struct uvc_format_uncompressed	desc;
-};
-
-static struct uvcg_uncompressed *to_uvcg_uncompressed(struct config_item *item)
-{
-	return container_of(
-		container_of(to_config_group(item), struct uvcg_format, group),
-		struct uvcg_uncompressed, fmt);
-}
-
 static struct configfs_group_operations uvcg_uncompressed_group_ops = {
 	.make_item		= uvcg_frame_make,
 	.drop_item		= uvcg_frame_drop,
@@ -1565,6 +1491,12 @@ uvcg_uncompressed_##cname##_store(struct config_item *item,		\
 	if (ret)							\
 		goto end;						\
 									\
+	/* index values in uvc are never 0 */				\
+	if (!num) {							\
+		ret = -EINVAL;						\
+		goto end;						\
+	}								\
+									\
 	u->desc.aname = num;						\
 	ret = len;							\
 end:									\
@@ -1645,6 +1577,7 @@ static struct config_group *uvcg_uncompressed_make(struct config_group *group,
 	h->desc.bmInterfaceFlags	= 0;
 	h->desc.bCopyProtect		= 0;
 
+	INIT_LIST_HEAD(&h->fmt.frames);
 	h->fmt.type = UVCG_UNCOMPRESSED;
 	config_group_init_type_name(&h->fmt.group, name,
 				    &uvcg_uncompressed_type);
@@ -1669,18 +1602,6 @@ static const struct uvcg_config_group_type uvcg_uncompressed_grp_type = {
  * streaming/mjpeg/<NAME>
  */
 
-struct uvcg_mjpeg {
-	struct uvcg_format		fmt;
-	struct uvc_format_mjpeg		desc;
-};
-
-static struct uvcg_mjpeg *to_uvcg_mjpeg(struct config_item *item)
-{
-	return container_of(
-		container_of(to_config_group(item), struct uvcg_format, group),
-		struct uvcg_mjpeg, fmt);
-}
-
 static struct configfs_group_operations uvcg_mjpeg_group_ops = {
 	.make_item		= uvcg_frame_make,
 	.drop_item		= uvcg_frame_drop,
@@ -1758,6 +1679,12 @@ uvcg_mjpeg_##cname##_store(struct config_item *item,			\
 	if (ret)							\
 		goto end;						\
 									\
+	/* index values in uvc are never 0 */				\
+	if (!num) {							\
+		ret = -EINVAL;						\
+		goto end;						\
+	}								\
+									\
 	u->desc.aname = num;						\
 	ret = len;							\
 end:									\
@@ -1831,6 +1758,7 @@ static struct config_group *uvcg_mjpeg_make(struct config_group *group,
 	h->desc.bmInterfaceFlags	= 0;
 	h->desc.bCopyProtect		= 0;
 
+	INIT_LIST_HEAD(&h->fmt.frames);
 	h->fmt.type = UVCG_MJPEG;
 	config_group_init_type_name(&h->fmt.group, name,
 				    &uvcg_mjpeg_type);
@@ -2425,10 +2353,51 @@ UVCG_OPTS_ATTR(streaming_maxburst, streaming_maxburst, 15);
 
 #undef UVCG_OPTS_ATTR
 
+#define UVCG_OPTS_STRING_ATTR(cname, aname)				\
+static ssize_t f_uvc_opts_string_##cname##_show(struct config_item *item,\
+					 char *page)			\
+{									\
+	struct f_uvc_opts *opts = to_f_uvc_opts(item);			\
+	int result;							\
+									\
+	mutex_lock(&opts->lock);					\
+	result = snprintf(page, sizeof(opts->aname), "%s", opts->aname);\
+	mutex_unlock(&opts->lock);					\
+									\
+	return result;							\
+}									\
+									\
+static ssize_t f_uvc_opts_string_##cname##_store(struct config_item *item,\
+					  const char *page, size_t len)	\
+{									\
+	struct f_uvc_opts *opts = to_f_uvc_opts(item);			\
+	int ret = 0;							\
+									\
+	mutex_lock(&opts->lock);					\
+	if (opts->refcnt) {						\
+		ret = -EBUSY;						\
+		goto end;						\
+	}								\
+									\
+	ret = snprintf(opts->aname, min(sizeof(opts->aname), len),	\
+			"%s", page);					\
+									\
+end:									\
+	mutex_unlock(&opts->lock);					\
+	return ret;							\
+}									\
+									\
+UVC_ATTR(f_uvc_opts_string_, cname, aname)
+
+UVCG_OPTS_STRING_ATTR(function_name, function_name);
+
+#undef UVCG_OPTS_STRING_ATTR
+
 static struct configfs_attribute *uvc_attrs[] = {
 	&f_uvc_opts_attr_streaming_interval,
 	&f_uvc_opts_attr_streaming_maxpacket,
 	&f_uvc_opts_attr_streaming_maxburst,
+	&f_uvc_opts_string_attr_function_name,
 	NULL,
 };
 
diff --git a/drivers/usb/gadget/function/uvc_configfs.h b/drivers/usb/gadget/function/uvc_configfs.h
index 7e1d7ca29bf2..ad2ec8c4c78c 100644
--- a/drivers/usb/gadget/function/uvc_configfs.h
+++ b/drivers/usb/gadget/function/uvc_configfs.h
@@ -12,7 +12,125 @@
 #ifndef UVC_CONFIGFS_H
 #define UVC_CONFIGFS_H
 
-struct f_uvc_opts;
+#include <linux/configfs.h>
+
+#include "u_uvc.h"
+
+static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item)
+{
+	return container_of(to_config_group(item), struct f_uvc_opts,
+			    func_inst.group);
+}
+
+#define UVCG_STREAMING_CONTROL_SIZE	1
+
+DECLARE_UVC_HEADER_DESCRIPTOR(1);
+
+struct uvcg_control_header {
+	struct config_item		item;
+	struct UVC_HEADER_DESCRIPTOR(1)	desc;
+	unsigned			linked;
+};
+
+static inline struct uvcg_control_header *to_uvcg_control_header(struct config_item *item)
+{
+	return container_of(item, struct uvcg_control_header, item);
+}
+
+enum uvcg_format_type {
+	UVCG_UNCOMPRESSED = 0,
+	UVCG_MJPEG,
+};
+
+struct uvcg_format {
+	struct config_group	group;
+	enum uvcg_format_type	type;
+	unsigned		linked;
+	struct list_head	frames;
+	unsigned		num_frames;
+	__u8			bmaControls[UVCG_STREAMING_CONTROL_SIZE];
+};
+
+struct uvcg_format_ptr {
+	struct uvcg_format	*fmt;
+	struct list_head	entry;
+};
+
+static inline struct uvcg_format *to_uvcg_format(struct config_item *item)
+{
+	return container_of(to_config_group(item), struct uvcg_format, group);
+}
+
+struct uvcg_streaming_header {
+	struct config_item				item;
+	struct uvc_input_header_descriptor		desc;
+	unsigned					linked;
+	struct list_head				formats;
+	unsigned					num_fmt;
+};
+
+static inline struct uvcg_streaming_header *to_uvcg_streaming_header(struct config_item *item)
+{
+	return container_of(item, struct uvcg_streaming_header, item);
+}
+
+struct uvcg_frame_ptr {
+	struct uvcg_frame	*frm;
+	struct list_head	entry;
+};
+
+struct uvcg_frame {
+	struct config_item	item;
+	enum uvcg_format_type	fmt_type;
+	struct {
+		u8	b_length;
+		u8	b_descriptor_type;
+		u8	b_descriptor_subtype;
+		u8	b_frame_index;
+		u8	bm_capabilities;
+		u16	w_width;
+		u16	w_height;
+		u32	dw_min_bit_rate;
+		u32	dw_max_bit_rate;
+		u32	dw_max_video_frame_buffer_size;
+		u32	dw_default_frame_interval;
+		u8	b_frame_interval_type;
+	} __attribute__((packed)) frame;
+	u32 *dw_frame_interval;
+};
+
+static inline struct uvcg_frame *to_uvcg_frame(struct config_item *item)
+{
+	return container_of(item, struct uvcg_frame, item);
+}
+
+/* -----------------------------------------------------------------------------
+ * streaming/uncompressed/<NAME>
+ */
+
+struct uvcg_uncompressed {
+	struct uvcg_format		fmt;
+	struct uvc_format_uncompressed	desc;
+};
+
+static inline struct uvcg_uncompressed *to_uvcg_uncompressed(struct config_item *item)
+{
+	return container_of(to_uvcg_format(item), struct uvcg_uncompressed, fmt);
+}
+
+/* -----------------------------------------------------------------------------
+ * streaming/mjpeg/<NAME>
+ */
+
+struct uvcg_mjpeg {
+	struct uvcg_format		fmt;
+	struct uvc_format_mjpeg		desc;
+};
+
+static inline struct uvcg_mjpeg *to_uvcg_mjpeg(struct config_item *item)
+{
+	return container_of(to_uvcg_format(item), struct uvcg_mjpeg, fmt);
+}
 
 int uvcg_attach_configfs(struct f_uvc_opts *opts);
 
diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c
index 2cda982f3765..d25edc3d2174 100644
--- a/drivers/usb/gadget/function/uvc_queue.c
+++ b/drivers/usb/gadget/function/uvc_queue.c
@@ -185,18 +185,7 @@ int uvcg_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
 
 int uvcg_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
 {
-	unsigned long flags;
-	int ret;
-
-	ret = vb2_qbuf(&queue->queue, NULL, buf);
-	if (ret < 0)
-		return ret;
-
-	spin_lock_irqsave(&queue->irqlock, flags);
-	ret = (queue->flags & UVC_QUEUE_PAUSED) != 0;
-	queue->flags &= ~UVC_QUEUE_PAUSED;
-	spin_unlock_irqrestore(&queue->irqlock, flags);
-	return ret;
+	return vb2_qbuf(&queue->queue, NULL, buf);
 }
 
 /*
@@ -328,33 +317,22 @@ int uvcg_queue_enable(struct uvc_video_queue *queue, int enable)
 }
 
 /* called with &queue_irqlock held.. */
-struct uvc_buffer *uvcg_queue_next_buffer(struct uvc_video_queue *queue,
+void uvcg_complete_buffer(struct uvc_video_queue *queue,
 					  struct uvc_buffer *buf)
 {
-	struct uvc_buffer *nextbuf;
-
 	if ((queue->flags & UVC_QUEUE_DROP_INCOMPLETE) &&
 	     buf->length != buf->bytesused) {
 		buf->state = UVC_BUF_STATE_QUEUED;
 		vb2_set_plane_payload(&buf->buf.vb2_buf, 0, 0);
-		return buf;
+		return;
 	}
 
-	list_del(&buf->queue);
-	if (!list_empty(&queue->irqqueue))
-		nextbuf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
-					   queue);
-	else
-		nextbuf = NULL;
-
 	buf->buf.field = V4L2_FIELD_NONE;
 	buf->buf.sequence = queue->sequence++;
 	buf->buf.vb2_buf.timestamp = ktime_get_ns();
 
 	vb2_set_plane_payload(&buf->buf.vb2_buf, 0, buf->bytesused);
 	vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_DONE);
-
-	return nextbuf;
 }
 
 struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue)
@@ -364,8 +342,6 @@ struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue)
 	if (!list_empty(&queue->irqqueue))
 		buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
 				       queue);
-	else
-		queue->flags |= UVC_QUEUE_PAUSED;
 
 	return buf;
 }
diff --git a/drivers/usb/gadget/function/uvc_queue.h b/drivers/usb/gadget/function/uvc_queue.h
index 05360a0767f6..41f87b917f6b 100644
--- a/drivers/usb/gadget/function/uvc_queue.h
+++ b/drivers/usb/gadget/function/uvc_queue.h
@@ -43,7 +43,6 @@ struct uvc_buffer {
 
 #define UVC_QUEUE_DISCONNECTED		(1 << 0)
 #define UVC_QUEUE_DROP_INCOMPLETE	(1 << 1)
-#define UVC_QUEUE_PAUSED		(1 << 2)
 
 struct uvc_video_queue {
 	struct vb2_queue queue;
@@ -93,7 +92,7 @@ void uvcg_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 
 int uvcg_queue_enable(struct uvc_video_queue *queue, int enable);
 
-struct uvc_buffer *uvcg_queue_next_buffer(struct uvc_video_queue *queue,
+void uvcg_complete_buffer(struct uvc_video_queue *queue,
 					  struct uvc_buffer *buf);
 
 struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue);
diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c
index 7f59a0c47402..a9bb4553db84 100644
--- a/drivers/usb/gadget/function/uvc_video.c
+++ b/drivers/usb/gadget/function/uvc_video.c
@@ -112,7 +112,8 @@ uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video,
 	if (buf->bytesused == video->queue.buf_used) {
 		video->queue.buf_used = 0;
 		buf->state = UVC_BUF_STATE_DONE;
-		uvcg_queue_next_buffer(&video->queue, buf);
+		list_del(&buf->queue);
+		uvcg_complete_buffer(&video->queue, buf);
 		video->fid ^= UVC_STREAM_FID;
 
 		video->payload_size = 0;
@@ -154,7 +155,7 @@ uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video,
 	sg = sg_next(sg);
 
 	for_each_sg(sg, iter, ureq->sgt.nents - 1, i) {
-		if (!len || !buf->sg)
+		if (!len || !buf->sg || !sg_dma_len(buf->sg))
 			break;
 
 		sg_left = sg_dma_len(buf->sg) - buf->offset;
@@ -183,8 +184,9 @@ uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video,
 		video->queue.buf_used = 0;
 		buf->state = UVC_BUF_STATE_DONE;
 		buf->offset = 0;
-		uvcg_queue_next_buffer(&video->queue, buf);
+		list_del(&buf->queue);
 		video->fid ^= UVC_STREAM_FID;
+		ureq->last_buf = buf;
 	}
 }
 
@@ -210,7 +212,8 @@ uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video,
 	if (buf->bytesused == video->queue.buf_used) {
 		video->queue.buf_used = 0;
 		buf->state = UVC_BUF_STATE_DONE;
-		uvcg_queue_next_buffer(&video->queue, buf);
+		list_del(&buf->queue);
+		uvcg_complete_buffer(&video->queue, buf);
 		video->fid ^= UVC_STREAM_FID;
 	}
 }
@@ -264,6 +267,11 @@ uvc_video_complete(struct usb_ep *ep, struct usb_request *req)
 		uvcg_queue_cancel(queue, 0);
 	}
 
+	if (ureq->last_buf) {
+		uvcg_complete_buffer(&video->queue, ureq->last_buf);
+		ureq->last_buf = NULL;
+	}
+
 	spin_lock_irqsave(&video->req_lock, flags);
 	list_add_tail(&req->list, &video->req_free);
 	spin_unlock_irqrestore(&video->req_lock, flags);
@@ -332,6 +340,7 @@ uvc_video_alloc_requests(struct uvc_video *video)
 		video->ureq[i].req->complete = uvc_video_complete;
 		video->ureq[i].req->context = &video->ureq[i];
 		video->ureq[i].video = video;
+		video->ureq[i].last_buf = NULL;
 
 		list_add_tail(&video->ureq[i].req->list, &video->req_free);
 		/* req_size/PAGE_SIZE + 1 for overruns and + 1 for header */
diff --git a/drivers/usb/gadget/legacy/dbgp.c b/drivers/usb/gadget/legacy/dbgp.c
index 6bcbad382580..b62e45235e8e 100644
--- a/drivers/usb/gadget/legacy/dbgp.c
+++ b/drivers/usb/gadget/legacy/dbgp.c
@@ -422,7 +422,7 @@ static struct usb_gadget_driver dbgp_driver = {
 
 static int __init dbgp_init(void)
 {
-	return usb_gadget_probe_driver(&dbgp_driver);
+	return usb_gadget_register_driver(&dbgp_driver);
 }
 
 static void __exit dbgp_exit(void)
diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index 0c01e749f9ea..79990597c39f 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -1873,7 +1873,7 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
 	else
 		gadgetfs_driver.max_speed = USB_SPEED_FULL;
 
-	value = usb_gadget_probe_driver(&gadgetfs_driver);
+	value = usb_gadget_register_driver(&gadgetfs_driver);
 	if (value != 0) {
 		spin_lock_irq(&dev->lock);
 		goto fail;
diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c
index e9440f7bf019..241740024c50 100644
--- a/drivers/usb/gadget/legacy/raw_gadget.c
+++ b/drivers/usb/gadget/legacy/raw_gadget.c
@@ -512,12 +512,12 @@ static int raw_ioctl_run(struct raw_dev *dev, unsigned long value)
 	dev->state = STATE_DEV_REGISTERING;
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	ret = usb_gadget_probe_driver(&dev->driver);
+	ret = usb_gadget_register_driver(&dev->driver);
 
 	spin_lock_irqsave(&dev->lock, flags);
 	if (ret) {
 		dev_err(dev->dev,
-			"fail, usb_gadget_probe_driver returned %d\n", ret);
+			"fail, usb_gadget_register_driver returned %d\n", ret);
 		dev->state = STATE_DEV_FAILED;
 		goto out_unlock;
 	}
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 85b194011a16..7886497253cc 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/list.h>
+#include <linux/idr.h>
 #include <linux/err.h>
 #include <linux/dma-mapping.h>
 #include <linux/sched/task_stack.h>
@@ -23,6 +24,10 @@
 
 #include "trace.h"
 
+static DEFINE_IDA(gadget_id_numbers);
+
+static struct bus_type gadget_bus_type;
+
 /**
  * struct usb_udc - describes one usb device controller
  * @driver: the gadget driver pointer. For use by the class code
@@ -47,11 +52,9 @@ struct usb_udc {
 
 static struct class *udc_class;
 static LIST_HEAD(udc_list);
-static LIST_HEAD(gadget_driver_pending_list);
-static DEFINE_MUTEX(udc_lock);
 
-static int udc_bind_to_driver(struct usb_udc *udc,
-		struct usb_gadget_driver *driver);
+/* Protects udc_list, udc->driver, driver->is_bound, and related calls */
+static DEFINE_MUTEX(udc_lock);
 
 /* ------------------------------------------------------------------------- */
 
@@ -1238,38 +1241,16 @@ static void usb_udc_nop_release(struct device *dev)
 	dev_vdbg(dev, "%s\n", __func__);
 }
 
-/* should be called with udc_lock held */
-static int check_pending_gadget_drivers(struct usb_udc *udc)
-{
-	struct usb_gadget_driver *driver;
-	int ret = 0;
-
-	list_for_each_entry(driver, &gadget_driver_pending_list, pending)
-		if (!driver->udc_name || strcmp(driver->udc_name,
-						dev_name(&udc->dev)) == 0) {
-			ret = udc_bind_to_driver(udc, driver);
-			if (ret != -EPROBE_DEFER)
-				list_del_init(&driver->pending);
-			break;
-		}
-
-	return ret;
-}
-
 /**
  * usb_initialize_gadget - initialize a gadget and its embedded struct device
  * @parent: the parent device to this udc. Usually the controller driver's
  * device.
  * @gadget: the gadget to be initialized.
  * @release: a gadget release function.
- *
- * Returns zero on success, negative errno otherwise.
- * Calls the gadget release function in the latter case.
  */
 void usb_initialize_gadget(struct device *parent, struct usb_gadget *gadget,
 		void (*release)(struct device *dev))
 {
-	dev_set_name(&gadget->dev, "gadget");
 	INIT_WORK(&gadget->work, usb_gadget_state_work);
 	gadget->dev.parent = parent;
 
@@ -1279,6 +1260,7 @@ void usb_initialize_gadget(struct device *parent, struct usb_gadget *gadget,
 		gadget->dev.release = usb_udc_nop_release;
 
 	device_initialize(&gadget->dev);
+	gadget->dev.bus = &gadget_bus_type;
 }
 EXPORT_SYMBOL_GPL(usb_initialize_gadget);
 
@@ -1308,10 +1290,6 @@ int usb_add_gadget(struct usb_gadget *gadget)
 	if (ret)
 		goto err_put_udc;
 
-	ret = device_add(&gadget->dev);
-	if (ret)
-		goto err_put_udc;
-
 	udc->gadget = gadget;
 	gadget->udc = udc;
 
@@ -1319,6 +1297,7 @@ int usb_add_gadget(struct usb_gadget *gadget)
 
 	mutex_lock(&udc_lock);
 	list_add_tail(&udc->list, &udc_list);
+	mutex_unlock(&udc_lock);
 
 	ret = device_add(&udc->dev);
 	if (ret)
@@ -1327,25 +1306,30 @@ int usb_add_gadget(struct usb_gadget *gadget)
 	usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED);
 	udc->vbus = true;
 
-	/* pick up one of pending gadget drivers */
-	ret = check_pending_gadget_drivers(udc);
-	if (ret)
+	ret = ida_alloc(&gadget_id_numbers, GFP_KERNEL);
+	if (ret < 0)
 		goto err_del_udc;
+	gadget->id_number = ret;
+	dev_set_name(&gadget->dev, "gadget.%d", ret);
 
-	mutex_unlock(&udc_lock);
+	ret = device_add(&gadget->dev);
+	if (ret)
+		goto err_free_id;
 
 	return 0;
 
+ err_free_id:
+	ida_free(&gadget_id_numbers, gadget->id_number);
+
  err_del_udc:
 	flush_work(&gadget->work);
 	device_del(&udc->dev);
 
  err_unlist_udc:
+	mutex_lock(&udc_lock);
 	list_del(&udc->list);
 	mutex_unlock(&udc_lock);
 
-	device_del(&gadget->dev);
-
  err_put_udc:
 	put_device(&udc->dev);
 
@@ -1421,30 +1405,11 @@ int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget)
 }
 EXPORT_SYMBOL_GPL(usb_add_gadget_udc);
 
-static void usb_gadget_remove_driver(struct usb_udc *udc)
-{
-	dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n",
-			udc->driver->function);
-
-	kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
-
-	usb_gadget_disconnect(udc->gadget);
-	usb_gadget_disable_async_callbacks(udc);
-	if (udc->gadget->irq)
-		synchronize_irq(udc->gadget->irq);
-	udc->driver->unbind(udc->gadget);
-	usb_gadget_udc_stop(udc);
-
-	udc->driver = NULL;
-	udc->gadget->dev.driver = NULL;
-}
-
 /**
- * usb_del_gadget - deletes @udc from udc_list
- * @gadget: the gadget to be removed.
+ * usb_del_gadget - deletes a gadget and unregisters its udc
+ * @gadget: the gadget to be deleted.
  *
- * This will call usb_gadget_unregister_driver() if
- * the @udc is still busy.
+ * This will unbind @gadget, if it is bound.
  * It will not do a final usb_put_gadget().
  */
 void usb_del_gadget(struct usb_gadget *gadget)
@@ -1458,25 +1423,19 @@ void usb_del_gadget(struct usb_gadget *gadget)
 
 	mutex_lock(&udc_lock);
 	list_del(&udc->list);
-
-	if (udc->driver) {
-		struct usb_gadget_driver *driver = udc->driver;
-
-		usb_gadget_remove_driver(udc);
-		list_add(&driver->pending, &gadget_driver_pending_list);
-	}
 	mutex_unlock(&udc_lock);
 
 	kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE);
 	flush_work(&gadget->work);
-	device_unregister(&udc->dev);
 	device_del(&gadget->dev);
+	ida_free(&gadget_id_numbers, gadget->id_number);
+	device_unregister(&udc->dev);
 }
 EXPORT_SYMBOL_GPL(usb_del_gadget);
 
 /**
- * usb_del_gadget_udc - deletes @udc from udc_list
- * @gadget: the gadget to be removed.
+ * usb_del_gadget_udc - unregisters a gadget
+ * @gadget: the gadget to be unregistered.
  *
  * Calls usb_del_gadget() and does a final usb_put_gadget().
  */
@@ -1489,123 +1448,147 @@ EXPORT_SYMBOL_GPL(usb_del_gadget_udc);
 
 /* ------------------------------------------------------------------------- */
 
-static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *driver)
+static int gadget_match_driver(struct device *dev, struct device_driver *drv)
 {
-	int ret;
+	struct usb_gadget *gadget = dev_to_usb_gadget(dev);
+	struct usb_udc *udc = gadget->udc;
+	struct usb_gadget_driver *driver = container_of(drv,
+			struct usb_gadget_driver, driver);
 
-	dev_dbg(&udc->dev, "registering UDC driver [%s]\n",
-			driver->function);
+	/* If the driver specifies a udc_name, it must match the UDC's name */
+	if (driver->udc_name &&
+			strcmp(driver->udc_name, dev_name(&udc->dev)) != 0)
+		return 0;
+
+	/* If the driver is already bound to a gadget, it doesn't match */
+	if (driver->is_bound)
+		return 0;
+
+	/* Otherwise any gadget driver matches any UDC */
+	return 1;
+}
 
+static int gadget_bind_driver(struct device *dev)
+{
+	struct usb_gadget *gadget = dev_to_usb_gadget(dev);
+	struct usb_udc *udc = gadget->udc;
+	struct usb_gadget_driver *driver = container_of(dev->driver,
+			struct usb_gadget_driver, driver);
+	int ret = 0;
+
+	mutex_lock(&udc_lock);
+	if (driver->is_bound) {
+		mutex_unlock(&udc_lock);
+		return -ENXIO;		/* Driver binds to only one gadget */
+	}
+	driver->is_bound = true;
 	udc->driver = driver;
-	udc->gadget->dev.driver = &driver->driver;
+	mutex_unlock(&udc_lock);
+
+	dev_dbg(&udc->dev, "binding gadget driver [%s]\n", driver->function);
 
 	usb_gadget_udc_set_speed(udc, driver->max_speed);
 
+	mutex_lock(&udc_lock);
 	ret = driver->bind(udc->gadget, driver);
 	if (ret)
-		goto err1;
+		goto err_bind;
+
 	ret = usb_gadget_udc_start(udc);
-	if (ret) {
-		driver->unbind(udc->gadget);
-		goto err1;
-	}
+	if (ret)
+		goto err_start;
 	usb_gadget_enable_async_callbacks(udc);
 	usb_udc_connect_control(udc);
+	mutex_unlock(&udc_lock);
 
 	kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
 	return 0;
-err1:
+
+ err_start:
+	driver->unbind(udc->gadget);
+
+ err_bind:
 	if (ret != -EISNAM)
 		dev_err(&udc->dev, "failed to start %s: %d\n",
-			udc->driver->function, ret);
+			driver->function, ret);
+
 	udc->driver = NULL;
-	udc->gadget->dev.driver = NULL;
+	driver->is_bound = false;
+	mutex_unlock(&udc_lock);
+
 	return ret;
 }
 
-int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
+static void gadget_unbind_driver(struct device *dev)
 {
-	struct usb_udc		*udc = NULL, *iter;
-	int			ret = -ENODEV;
+	struct usb_gadget *gadget = dev_to_usb_gadget(dev);
+	struct usb_udc *udc = gadget->udc;
+	struct usb_gadget_driver *driver = udc->driver;
+
+	dev_dbg(&udc->dev, "unbinding gadget driver [%s]\n", driver->function);
+
+	kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
+
+	mutex_lock(&udc_lock);
+	usb_gadget_disconnect(gadget);
+	usb_gadget_disable_async_callbacks(udc);
+	if (gadget->irq)
+		synchronize_irq(gadget->irq);
+	udc->driver->unbind(gadget);
+	usb_gadget_udc_stop(udc);
+
+	driver->is_bound = false;
+	udc->driver = NULL;
+	mutex_unlock(&udc_lock);
+}
+
+/* ------------------------------------------------------------------------- */
+
+int usb_gadget_register_driver_owner(struct usb_gadget_driver *driver,
+		struct module *owner, const char *mod_name)
+{
+	int ret;
 
 	if (!driver || !driver->bind || !driver->setup)
 		return -EINVAL;
 
+	driver->driver.bus = &gadget_bus_type;
+	driver->driver.owner = owner;
+	driver->driver.mod_name = mod_name;
+	ret = driver_register(&driver->driver);
+	if (ret) {
+		pr_warn("%s: driver registration failed: %d\n",
+				driver->function, ret);
+		return ret;
+	}
+
 	mutex_lock(&udc_lock);
-	if (driver->udc_name) {
-		list_for_each_entry(iter, &udc_list, list) {
-			ret = strcmp(driver->udc_name, dev_name(&iter->dev));
-			if (ret)
-				continue;
-			udc = iter;
-			break;
-		}
-		if (ret)
-			ret = -ENODEV;
-		else if (udc->driver)
+	if (!driver->is_bound) {
+		if (driver->match_existing_only) {
+			pr_warn("%s: couldn't find an available UDC or it's busy\n",
+					driver->function);
 			ret = -EBUSY;
-		else
-			goto found;
-	} else {
-		list_for_each_entry(iter, &udc_list, list) {
-			/* For now we take the first one */
-			if (iter->driver)
-				continue;
-			udc = iter;
-			goto found;
+		} else {
+			pr_info("%s: couldn't find an available UDC\n",
+					driver->function);
+			ret = 0;
 		}
 	}
-
-	if (!driver->match_existing_only) {
-		list_add_tail(&driver->pending, &gadget_driver_pending_list);
-		pr_info("couldn't find an available UDC - added [%s] to list of pending drivers\n",
-			driver->function);
-		ret = 0;
-	}
-
 	mutex_unlock(&udc_lock);
+
 	if (ret)
-		pr_warn("couldn't find an available UDC or it's busy: %d\n", ret);
-	return ret;
-found:
-	ret = udc_bind_to_driver(udc, driver);
-	mutex_unlock(&udc_lock);
+		driver_unregister(&driver->driver);
 	return ret;
 }
-EXPORT_SYMBOL_GPL(usb_gadget_probe_driver);
+EXPORT_SYMBOL_GPL(usb_gadget_register_driver_owner);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
-	struct usb_udc		*udc = NULL;
-	int			ret = -ENODEV;
-
 	if (!driver || !driver->unbind)
 		return -EINVAL;
 
-	mutex_lock(&udc_lock);
-	list_for_each_entry(udc, &udc_list, list) {
-		if (udc->driver == driver) {
-			usb_gadget_remove_driver(udc);
-			usb_gadget_set_state(udc->gadget,
-					     USB_STATE_NOTATTACHED);
-
-			/* Maybe there is someone waiting for this UDC? */
-			check_pending_gadget_drivers(udc);
-			/*
-			 * For now we ignore bind errors as probably it's
-			 * not a valid reason to fail other's gadget unbind
-			 */
-			ret = 0;
-			break;
-		}
-	}
-
-	if (ret) {
-		list_del(&driver->pending);
-		ret = 0;
-	}
-	mutex_unlock(&udc_lock);
-	return ret;
+	driver_unregister(&driver->driver);
+	return 0;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver);
 
@@ -1757,8 +1740,17 @@ static int usb_udc_uevent(struct device *dev, struct kobj_uevent_env *env)
 	return 0;
 }
 
+static struct bus_type gadget_bus_type = {
+	.name = "gadget",
+	.probe = gadget_bind_driver,
+	.remove = gadget_unbind_driver,
+	.match = gadget_match_driver,
+};
+
 static int __init usb_udc_init(void)
 {
+	int rc;
+
 	udc_class = class_create(THIS_MODULE, "udc");
 	if (IS_ERR(udc_class)) {
 		pr_err("failed to create udc class --> %ld\n",
@@ -1767,12 +1759,17 @@ static int __init usb_udc_init(void)
 	}
 
 	udc_class->dev_uevent = usb_udc_uevent;
-	return 0;
+
+	rc = bus_register(&gadget_bus_type);
+	if (rc)
+		class_destroy(udc_class);
+	return rc;
 }
 subsys_initcall(usb_udc_init);
 
 static void __exit usb_udc_exit(void)
 {
+	bus_unregister(&gadget_bus_type);
 	class_destroy(udc_class);
 }
 module_exit(usb_udc_exit);
diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index 6a8884632273..c97cd4bc817c 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -71,7 +71,7 @@ static ushort dma_ep = 1;
 module_param(dma_ep, ushort, 0644);
 
 /*
- * dma_mode: net2272 dma mode setting (see LOCCTL1 definiton):
+ * dma_mode: net2272 dma mode setting (see LOCCTL1 definition):
  *	mode 0 == Slow DREQ mode
  *	mode 1 == Fast DREQ mode
  *	mode 2 == Burst mode
@@ -97,7 +97,7 @@ module_param(fifo_mode, ushort, 0644);
 /*
  * enable_suspend: When enabled, the driver will respond to
  * USB suspend requests by powering down the NET2272.  Otherwise,
- * USB suspend requests will be ignored.  This is acceptible for
+ * USB suspend requests will be ignored.  This is acceptable for
  * self-powered devices.  For bus powered devices set this to 1.
  */
 static ushort enable_suspend = 0;
@@ -288,7 +288,7 @@ static void net2272_ep_reset(struct net2272_ep *ep)
 			  | (1 << LOCAL_OUT_ZLP)
 			  | (1 << BUFFER_FLUSH));
 
-	/* fifo size is handled seperately */
+	/* fifo size is handled separately */
 }
 
 static int net2272_disable(struct usb_ep *_ep)
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index 051d024b369e..d6a68631354a 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -932,19 +932,11 @@ static void start_dma(struct net2280_ep *ep, struct net2280_request *req)
 static inline void
 queue_dma(struct net2280_ep *ep, struct net2280_request *req, int valid)
 {
-	struct net2280_dma	*end;
-	dma_addr_t		tmp;
-
 	/* swap new dummy for old, link; fill and maybe activate */
-	end = ep->dummy;
-	ep->dummy = req->td;
-	req->td = end;
-
-	tmp = ep->td_dma;
-	ep->td_dma = req->td_dma;
-	req->td_dma = tmp;
+	swap(ep->dummy, req->td);
+	swap(ep->td_dma, req->td_dma);
 
-	end->dmadesc = cpu_to_le32 (ep->td_dma);
+	req->td->dmadesc = cpu_to_le32 (ep->td_dma);
 
 	fill_dma_desc(ep, req, valid);
 }
diff --git a/drivers/usb/gadget/udc/omap_udc.c b/drivers/usb/gadget/udc/omap_udc.c
index 5096d24915ce..61cabb9de6ae 100644
--- a/drivers/usb/gadget/udc/omap_udc.c
+++ b/drivers/usb/gadget/udc/omap_udc.c
@@ -1470,7 +1470,7 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
 			if (!udc->ep0_in) {
 				stat = 0;
 				/* read next OUT packet of request, maybe
-				 * reactiviting the fifo; stall on errors.
+				 * reactivating the fifo; stall on errors.
 				 */
 				stat = read_fifo(ep0, req);
 				if (!req || stat < 0) {
@@ -2609,6 +2609,8 @@ static void omap_udc_release(struct device *dev)
 	if (udc->dc_clk) {
 		if (udc->clk_requested)
 			omap_udc_enable_clock(0);
+		clk_unprepare(udc->hhc_clk);
+		clk_unprepare(udc->dc_clk);
 		clk_put(udc->hhc_clk);
 		clk_put(udc->dc_clk);
 	}
@@ -2773,8 +2775,8 @@ static int omap_udc_probe(struct platform_device *pdev)
 		hhc_clk = clk_get(&pdev->dev, "usb_hhc_ck");
 		BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
 		/* can't use omap_udc_enable_clock yet */
-		clk_enable(dc_clk);
-		clk_enable(hhc_clk);
+		clk_prepare_enable(dc_clk);
+		clk_prepare_enable(hhc_clk);
 		udelay(100);
 	}
 
@@ -2783,8 +2785,8 @@ static int omap_udc_probe(struct platform_device *pdev)
 		hhc_clk = clk_get(&pdev->dev, "l3_ocpi_ck");
 		BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
 		/* can't use omap_udc_enable_clock yet */
-		clk_enable(dc_clk);
-		clk_enable(hhc_clk);
+		clk_prepare_enable(dc_clk);
+		clk_prepare_enable(hhc_clk);
 		udelay(100);
 	}
 
@@ -2932,8 +2934,8 @@ cleanup0:
 		usb_put_phy(xceiv);
 
 	if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
-		clk_disable(hhc_clk);
-		clk_disable(dc_clk);
+		clk_disable_unprepare(hhc_clk);
+		clk_disable_unprepare(dc_clk);
 		clk_put(hhc_clk);
 		clk_put(dc_clk);
 	}
diff --git a/drivers/usb/gadget/udc/pxa27x_udc.h b/drivers/usb/gadget/udc/pxa27x_udc.h
index 0a6bc18a1264..31bf79ce931c 100644
--- a/drivers/usb/gadget/udc/pxa27x_udc.h
+++ b/drivers/usb/gadget/udc/pxa27x_udc.h
@@ -326,7 +326,7 @@ struct udc_usb_ep {
  * @addr: usb endpoint number
  * @config: configuration in which this endpoint is active
  * @interface: interface in which this endpoint is active
- * @alternate: altsetting in which this endpoitn is active
+ * @alternate: altsetting in which this endpoint is active
  * @fifo_size: max packet size in the endpoint fifo
  * @type: endpoint type (bulk, iso, int, ...)
  * @udccsr_value: save register of UDCCSR0 for suspend/resume
diff --git a/drivers/usb/gadget/udc/s3c-hsudc.c b/drivers/usb/gadget/udc/s3c-hsudc.c
index bf803e013458..4b7eb7701470 100644
--- a/drivers/usb/gadget/udc/s3c-hsudc.c
+++ b/drivers/usb/gadget/udc/s3c-hsudc.c
@@ -126,7 +126,7 @@ struct s3c_hsudc_req {
 /**
  * struct s3c_hsudc - Driver's abstraction of the device controller.
  * @gadget: Instance of usb_gadget which is referenced by gadget driver.
- * @driver: Reference to currenty active gadget driver.
+ * @driver: Reference to currently active gadget driver.
  * @dev: The device reference used by probe function.
  * @lock: Lock to synchronize the usage of Endpoints (EP's are indexed).
  * @regs: Remapped base address of controller's register space.
@@ -633,7 +633,7 @@ static void s3c_hsudc_process_setup(struct s3c_hsudc *hsudc)
 }
 
 /** s3c_hsudc_handle_ep0_intr - Handle endpoint 0 interrupt.
- * @hsudc: Device controller on which endpoint 0 interrupt has occured.
+ * @hsudc: Device controller on which endpoint 0 interrupt has occurred.
  *
  * Handle endpoint 0 interrupt when it occurs. EP0 interrupt could occur
  * when a stall handshake is sent to host or data is sent/received on
diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c
index d9c406bdb680..6d31ccf6aee5 100644
--- a/drivers/usb/gadget/udc/tegra-xudc.c
+++ b/drivers/usb/gadget/udc/tegra-xudc.c
@@ -1434,7 +1434,7 @@ __tegra_xudc_ep_dequeue(struct tegra_xudc_ep *ep,
 		return 0;
 	}
 
-	/* Halt DMA for this endpiont. */
+	/* Halt DMA for this endpoint. */
 	if (ep_ctx_read_state(ep->context) == EP_STATE_RUNNING) {
 		ep_pause(xudc, ep->index);
 		ep_wait_for_inactive(xudc, ep->index);
@@ -3423,7 +3423,7 @@ static void tegra_xudc_device_params_init(struct tegra_xudc *xudc)
 	}
 
 	/*
-	 * Compliacne suite appears to be violating polling LFPS tBurst max
+	 * Compliance suite appears to be violating polling LFPS tBurst max
 	 * of 1.4us.  Send 1.45us instead.
 	 */
 	val = xudc_readl(xudc, SSPX_CORE_CNT32);
diff --git a/drivers/usb/gadget/udc/udc-xilinx.c b/drivers/usb/gadget/udc/udc-xilinx.c
index 428c755cf2e1..4827e3cd3834 100644
--- a/drivers/usb/gadget/udc/udc-xilinx.c
+++ b/drivers/usb/gadget/udc/udc-xilinx.c
@@ -632,7 +632,7 @@ top:
 		dev_dbg(udc->dev, "read %s, %d bytes%s req %p %d/%d\n",
 			ep->ep_usb.name, count, is_short ? "/S" : "", req,
 			req->usb_req.actual, req->usb_req.length);
-		bufferspace -= count;
+
 		/* Completion */
 		if ((req->usb_req.actual == req->usb_req.length) || is_short) {
 			if (udc->dma_enabled && req->usb_req.length)
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 7f4a03e8647a..8c45bc17a580 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -61,11 +61,6 @@ static inline void ehci_write(void __iomem *base, u32 reg, u32 val)
 	__raw_writel(val, base + reg);
 }
 
-static inline u32 ehci_read(void __iomem *base, u32 reg)
-{
-	return __raw_readl(base + reg);
-}
-
 /* configure so an HC device and id are always provided */
 /* always called with process context; sleeping is OK */
 
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 1115431a255d..f343967443e2 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -518,6 +518,7 @@ static struct platform_driver ehci_platform_driver = {
 		.pm	= pm_ptr(&ehci_platform_pm_ops),
 		.of_match_table = vt8500_ehci_ids,
 		.acpi_match_table = ACPI_PTR(ehci_acpi_match),
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	}
 };
 
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index a2a5c2996350..1163af6fad77 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -645,7 +645,7 @@ qh_urb_transaction (
 		token |= (1 /* "in" */ << 8);
 	/* else it's already initted to "out" pid (0 << 8) */
 
-	maxpacket = usb_maxpacket(urb->dev, urb->pipe, !is_input);
+	maxpacket = usb_maxpacket(urb->dev, urb->pipe);
 
 	/*
 	 * buffer gets wrapped in one or more qtds;
@@ -1218,7 +1218,7 @@ static int ehci_submit_single_step_set_feature(
 
 	token |= (1 /* "in" */ << 8);  /*This is IN stage*/
 
-	maxpacket = usb_maxpacket(urb->dev, urb->pipe, 0);
+	maxpacket = usb_maxpacket(urb->dev, urb->pipe);
 
 	qtd_fill(ehci, qtd, buf, len, token, maxpacket);
 
diff --git a/drivers/usb/host/ehci-xilinx-of.c b/drivers/usb/host/ehci-xilinx-of.c
index 67a6ee8cb5d8..3d7893747835 100644
--- a/drivers/usb/host/ehci-xilinx-of.c
+++ b/drivers/usb/host/ehci-xilinx-of.c
@@ -32,6 +32,8 @@
  * There are cases when the host controller fails to enable the port due to,
  * for example, insufficient power that can be supplied to the device from
  * the USB bus. In those cases, the messages printed here are not helpful.
+ *
+ * Return: Always return 0
  */
 static int ehci_xilinx_port_handed_over(struct usb_hcd *hcd, int portnum)
 {
@@ -46,11 +48,9 @@ static int ehci_xilinx_port_handed_over(struct usb_hcd *hcd, int portnum)
 		dev_warn(hcd->self.controller,
 			"Maybe your device is not a high speed device?\n");
 		dev_warn(hcd->self.controller,
-			"The USB host controller does not support full speed "
-			"nor low speed devices\n");
+			"The USB host controller does not support full speed nor low speed devices\n");
 		dev_warn(hcd->self.controller,
-			"You can reconfigure the host controller to have "
-			"full speed support\n");
+			"You can reconfigure the host controller to have full speed support\n");
 	}
 
 	return 0;
@@ -112,6 +112,8 @@ static const struct hc_driver ehci_xilinx_of_hc_driver = {
  * host controller. Because the Xilinx USB host controller can be configured
  * as HS only or HS/FS only, it checks the configuration in the device tree
  * entry, and sets an appropriate value for hcd->has_tt.
+ *
+ * Return: zero on success, negative error code otherwise
  */
 static int ehci_hcd_xilinx_of_probe(struct platform_device *op)
 {
@@ -196,6 +198,8 @@ err_irq:
  *
  * Remove the hcd structure, and release resources that has been requested
  * during probe.
+ *
+ * Return: Always return 0
  */
 static int ehci_hcd_xilinx_of_remove(struct platform_device *op)
 {
diff --git a/drivers/usb/host/fhci-hcd.c b/drivers/usb/host/fhci-hcd.c
index a8e1048278d0..2ba09c3fbc2f 100644
--- a/drivers/usb/host/fhci-hcd.c
+++ b/drivers/usb/host/fhci-hcd.c
@@ -408,8 +408,7 @@ static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 			size++;
 		else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
 			 && (urb->transfer_buffer_length
-			     % usb_maxpacket(urb->dev, pipe,
-					     usb_pipeout(pipe))) != 0)
+			     % usb_maxpacket(urb->dev, pipe)) != 0)
 			size++;
 		break;
 	case PIPE_ISOCHRONOUS:
diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c
index c3fd375b4778..f8c111e08a0d 100644
--- a/drivers/usb/host/fotg210-hcd.c
+++ b/drivers/usb/host/fotg210-hcd.c
@@ -2596,7 +2596,7 @@ static struct list_head *qh_urb_transaction(struct fotg210_hcd *fotg210,
 		token |= (1 /* "in" */ << 8);
 	/* else it's already initted to "out" pid (0 << 8) */
 
-	maxpacket = usb_maxpacket(urb->dev, urb->pipe, !is_input);
+	maxpacket = usb_maxpacket(urb->dev, urb->pipe);
 
 	/*
 	 * buffer gets wrapped in one or more qtds;
diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index 8835f6bd528e..4f564d71bb0b 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -726,7 +726,7 @@ static int isp116x_urb_enqueue(struct usb_hcd *hcd,
 		INIT_LIST_HEAD(&ep->schedule);
 		ep->udev = udev;
 		ep->epnum = epnum;
-		ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
+		ep->maxpacket = usb_maxpacket(udev, urb->pipe);
 		usb_settoggle(udev, epnum, is_out, 0);
 
 		if (type == PIPE_CONTROL) {
@@ -757,8 +757,7 @@ static int isp116x_urb_enqueue(struct usb_hcd *hcd,
 			ep->load = usb_calc_bus_time(udev->speed,
 						     !is_out,
 						     (type == PIPE_ISOCHRONOUS),
-						     usb_maxpacket(udev, pipe,
-								   is_out)) /
+						     usb_maxpacket(udev, pipe)) /
 			    1000;
 		}
 		hep->hcpriv = ep;
@@ -1541,10 +1540,12 @@ static int isp116x_remove(struct platform_device *pdev)
 
 	iounmap(isp116x->data_reg);
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	release_mem_region(res->start, 2);
+	if (res)
+		release_mem_region(res->start, 2);
 	iounmap(isp116x->addr_reg);
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, 2);
+	if (res)
+		release_mem_region(res->start, 2);
 
 	usb_put_hcd(hcd);
 	return 0;
diff --git a/drivers/usb/host/isp1362-hcd.c b/drivers/usb/host/isp1362-hcd.c
index d8610ce8f2ec..0e14d1d07709 100644
--- a/drivers/usb/host/isp1362-hcd.c
+++ b/drivers/usb/host/isp1362-hcd.c
@@ -1279,7 +1279,7 @@ static int isp1362_urb_enqueue(struct usb_hcd *hcd,
 		ep->udev = usb_get_dev(udev);
 		ep->hep = hep;
 		ep->epnum = epnum;
-		ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
+		ep->maxpacket = usb_maxpacket(udev, urb->pipe);
 		ep->ptd_offset = -EINVAL;
 		ep->ptd_index = -EINVAL;
 		usb_settoggle(udev, epnum, is_out, 0);
@@ -1299,8 +1299,8 @@ static int isp1362_urb_enqueue(struct usb_hcd *hcd,
 			ep->interval = urb->interval;
 			ep->branch = PERIODIC_SIZE;
 			ep->load = usb_calc_bus_time(udev->speed, !is_out,
-						     (type == PIPE_ISOCHRONOUS),
-						     usb_maxpacket(udev, pipe, is_out)) / 1000;
+						     type == PIPE_ISOCHRONOUS,
+						     usb_maxpacket(udev, pipe)) / 1000;
 			break;
 		}
 		hep->hcpriv = ep;
diff --git a/drivers/usb/host/max3421-hcd.c b/drivers/usb/host/max3421-hcd.c
index 99a5523a79fb..502a3ac5e35b 100644
--- a/drivers/usb/host/max3421-hcd.c
+++ b/drivers/usb/host/max3421-hcd.c
@@ -546,7 +546,7 @@ max3421_transfer_out(struct usb_hcd *hcd, struct urb *urb, int fast_retransmit)
 		return MAX3421_HXFR_BULK_OUT(epnum);
 	}
 
-	max_packet = usb_maxpacket(urb->dev, urb->pipe, 1);
+	max_packet = usb_maxpacket(urb->dev, urb->pipe);
 
 	if (max_packet > MAX3421_FIFO_SIZE) {
 		/*
@@ -952,7 +952,7 @@ max3421_transfer_in_done(struct usb_hcd *hcd, struct urb *urb)
 	 * USB 2.0 Section 5.3.2 Pipes: packets must be full size
 	 * except for last one.
 	 */
-	max_packet = usb_maxpacket(urb->dev, urb->pipe, 0);
+	max_packet = usb_maxpacket(urb->dev, urb->pipe);
 	if (max_packet > MAX3421_FIFO_SIZE) {
 		/*
 		 * We do not support isochronous transfers at this
@@ -998,7 +998,7 @@ max3421_transfer_out_done(struct usb_hcd *hcd, struct urb *urb)
 		 * max_packet as an indicator that the end of the
 		 * packet has been reached).
 		 */
-		u32 max_packet = usb_maxpacket(urb->dev, urb->pipe, 1);
+		u32 max_packet = usb_maxpacket(urb->dev, urb->pipe);
 
 		if (max3421_hcd->curr_len == max_packet)
 			return 0;
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 666b1c665188..c4c821c2288c 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -181,8 +181,7 @@ static int ohci_urb_enqueue (
 				size++;
 			else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
 				&& (urb->transfer_buffer_length
-					% usb_maxpacket (urb->dev, pipe,
-						usb_pipeout (pipe))) == 0)
+					% usb_maxpacket(urb->dev, pipe)) == 0)
 				size++;
 			break;
 		case PIPE_ISOCHRONOUS: /* number of packets from URB */
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index 069791d25abb..f5bc9c8bdc9a 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -259,6 +259,10 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev)
 		goto err_put_hcd;
 	}
 
+	retval = clk_prepare(priv->usb_host_ck);
+	if (retval)
+		goto err_put_host_ck;
+
 	if (!cpu_is_omap15xx())
 		priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
 	else
@@ -266,13 +270,17 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev)
 
 	if (IS_ERR(priv->usb_dc_ck)) {
 		retval = PTR_ERR(priv->usb_dc_ck);
-		goto err_put_host_ck;
+		goto err_unprepare_host_ck;
 	}
 
+	retval = clk_prepare(priv->usb_dc_ck);
+	if (retval)
+		goto err_put_dc_ck;
+
 	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 		dev_dbg(&pdev->dev, "request_mem_region failed\n");
 		retval = -EBUSY;
-		goto err_put_dc_ck;
+		goto err_unprepare_dc_ck;
 	}
 
 	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
@@ -297,8 +305,12 @@ err3:
 	iounmap(hcd->regs);
 err2:
 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_unprepare_dc_ck:
+	clk_unprepare(priv->usb_dc_ck);
 err_put_dc_ck:
 	clk_put(priv->usb_dc_ck);
+err_unprepare_host_ck:
+	clk_unprepare(priv->usb_host_ck);
 err_put_host_ck:
 	clk_put(priv->usb_host_ck);
 err_put_hcd:
@@ -333,7 +345,9 @@ static int ohci_hcd_omap_remove(struct platform_device *pdev)
 	}
 	iounmap(hcd->regs);
 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+	clk_unprepare(priv->usb_dc_ck);
 	clk_put(priv->usb_dc_ck);
+	clk_unprepare(priv->usb_host_ck);
 	clk_put(priv->usb_host_ck);
 	usb_put_hcd(hcd);
 	return 0;
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 4a8456f12a73..47dfbfe9e519 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -334,6 +334,7 @@ static struct platform_driver ohci_platform_driver = {
 		.name	= "ohci-platform",
 		.pm	= &ohci_platform_pm_ops,
 		.of_match_table = ohci_platform_ids,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	}
 };
 
diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c
index 45f7cceb6df3..1960b8dfdba5 100644
--- a/drivers/usb/host/ohci-ppc-of.c
+++ b/drivers/usb/host/ohci-ppc-of.c
@@ -19,9 +19,6 @@
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 
-#include <asm/prom.h>
-
-
 static int
 ohci_ppc_of_start(struct usb_hcd *hcd)
 {
diff --git a/drivers/usb/host/oxu210hp-hcd.c b/drivers/usb/host/oxu210hp-hcd.c
index b741670525e3..3a441310c713 100644
--- a/drivers/usb/host/oxu210hp-hcd.c
+++ b/drivers/usb/host/oxu210hp-hcd.c
@@ -1685,7 +1685,7 @@ static struct list_head *qh_urb_transaction(struct oxu_hcd *oxu,
 		token |= (1 /* "in" */ << 8);
 	/* else it's already initted to "out" pid (0 << 8) */
 
-	maxpacket = usb_maxpacket(urb->dev, urb->pipe, !is_input);
+	maxpacket = usb_maxpacket(urb->dev, urb->pipe);
 
 	/*
 	 * buffer gets wrapped in one or more qtds;
@@ -1796,7 +1796,7 @@ static struct ehci_qh *qh_make(struct oxu_hcd *oxu,
 
 	is_input = usb_pipein(urb->pipe);
 	type = usb_pipetype(urb->pipe);
-	maxp = usb_maxpacket(urb->dev, urb->pipe, !is_input);
+	maxp = usb_maxpacket(urb->dev, urb->pipe);
 
 	/* Compute interrupt scheduling parameters just once, and save.
 	 * - allowing for high bandwidth, how many nsec/uframe are used?
@@ -3909,8 +3909,10 @@ static int oxu_bus_suspend(struct usb_hcd *hcd)
 		}
 	}
 
+	spin_unlock_irq(&oxu->lock);
 	/* turn off now-idle HC */
 	del_timer_sync(&oxu->watchdog);
+	spin_lock_irq(&oxu->lock);
 	ehci_halt(oxu);
 	hcd->state = HC_STATE_SUSPENDED;
 
@@ -4223,13 +4225,9 @@ static int oxu_drv_probe(struct platform_device *pdev)
 	/*
 	 * Get the platform resources
 	 */
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res) {
-		dev_err(&pdev->dev,
-			"no IRQ! Check %s setup!\n", dev_name(&pdev->dev));
-		return -ENODEV;
-	}
-	irq = res->start;
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
 	dev_dbg(&pdev->dev, "IRQ resource %d\n", irq);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 63719cdf6a4e..abb88dd40d4e 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -1867,8 +1867,7 @@ static struct r8a66597_td *r8a66597_make_td(struct r8a66597 *r8a66597,
 	td->pipe = hep->hcpriv;
 	td->urb = urb;
 	td->address = get_urb_to_r8a66597_addr(r8a66597, urb);
-	td->maxpacket = usb_maxpacket(urb->dev, urb->pipe,
-				      !usb_pipein(urb->pipe));
+	td->maxpacket = usb_maxpacket(urb->dev, urb->pipe);
 	if (usb_pipecontrol(urb->pipe))
 		td->type = USB_PID_SETUP;
 	else if (usb_pipein(urb->pipe))
diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index 85623731a516..d206bd95c7bb 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -842,7 +842,7 @@ static int sl811h_urb_enqueue(
 		INIT_LIST_HEAD(&ep->schedule);
 		ep->udev = udev;
 		ep->epnum = epnum;
-		ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
+		ep->maxpacket = usb_maxpacket(udev, urb->pipe);
 		ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
 		usb_settoggle(udev, epnum, is_out, 0);
 
@@ -878,8 +878,8 @@ static int sl811h_urb_enqueue(
 			if (type == PIPE_ISOCHRONOUS)
 				ep->defctrl |= SL11H_HCTLMASK_ISOCH;
 			ep->load = usb_calc_bus_time(udev->speed, !is_out,
-				(type == PIPE_ISOCHRONOUS),
-				usb_maxpacket(udev, pipe, is_out))
+						     type == PIPE_ISOCHRONOUS,
+						     usb_maxpacket(udev, pipe))
 					/ 1000;
 			break;
 		}
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index f65f1ba2b592..c54f2bc23d3f 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -707,6 +707,7 @@ static int xhci_enter_test_mode(struct xhci_hcd *xhci,
 				u16 test_mode, u16 wIndex, unsigned long *flags)
 	__must_hold(&xhci->lock)
 {
+	struct usb_hcd *usb3_hcd = xhci_get_usb3_hcd(xhci);
 	int i, retval;
 
 	/* Disable all Device Slots */
@@ -727,7 +728,7 @@ static int xhci_enter_test_mode(struct xhci_hcd *xhci,
 	xhci_dbg(xhci, "Disable all port (PP = 0)\n");
 	/* Power off USB3 ports*/
 	for (i = 0; i < xhci->usb3_rhub.num_ports; i++)
-		xhci_set_port_power(xhci, xhci->shared_hcd, i, false, flags);
+		xhci_set_port_power(xhci, usb3_hcd, i, false, flags);
 	/* Power off USB2 ports*/
 	for (i = 0; i < xhci->usb2_rhub.num_ports; i++)
 		xhci_set_port_power(xhci, xhci->main_hcd, i, false, flags);
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index bbb27ee2c6a3..8c19e151a945 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -782,14 +782,6 @@ void xhci_free_stream_info(struct xhci_hcd *xhci,
 
 /***************** Device context manipulation *************************/
 
-static void xhci_init_endpoint_timer(struct xhci_hcd *xhci,
-		struct xhci_virt_ep *ep)
-{
-	timer_setup(&ep->stop_cmd_timer, xhci_stop_endpoint_command_watchdog,
-		    0);
-	ep->xhci = xhci;
-}
-
 static void xhci_free_tt_info(struct xhci_hcd *xhci,
 		struct xhci_virt_device *virt_dev,
 		int slot_id)
@@ -994,11 +986,11 @@ int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
 	xhci_dbg(xhci, "Slot %d input ctx = 0x%llx (dma)\n", slot_id,
 			(unsigned long long)dev->in_ctx->dma);
 
-	/* Initialize the cancellation list and watchdog timers for each ep */
+	/* Initialize the cancellation and bandwidth list for each ep */
 	for (i = 0; i < 31; i++) {
 		dev->eps[i].ep_index = i;
 		dev->eps[i].vdev = dev;
-		xhci_init_endpoint_timer(xhci, &dev->eps[i]);
+		dev->eps[i].xhci = xhci;
 		INIT_LIST_HEAD(&dev->eps[i].cancelled_td_list);
 		INIT_LIST_HEAD(&dev->eps[i].bw_endpoint_list);
 	}
@@ -1072,7 +1064,7 @@ static u32 xhci_find_real_port_number(struct xhci_hcd *xhci,
 	struct usb_hcd *hcd;
 
 	if (udev->speed >= USB_SPEED_SUPER)
-		hcd = xhci->shared_hcd;
+		hcd = xhci_get_usb3_hcd(xhci);
 	else
 		hcd = xhci->main_hcd;
 
@@ -2362,10 +2354,11 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags)
 		xhci->usb2_rhub.num_ports = USB_MAXCHILDREN;
 	}
 
-	/*
-	 * Note we could have all USB 3.0 ports, or all USB 2.0 ports.
-	 * Not sure how the USB core will handle a hub with no ports...
-	 */
+	if (!xhci->usb2_rhub.num_ports)
+		xhci_info(xhci, "USB2 root hub has no ports\n");
+
+	if (!xhci->usb3_rhub.num_ports)
+		xhci_info(xhci, "USB3 root hub has no ports\n");
 
 	xhci_create_rhub_port_array(xhci, &xhci->usb2_rhub, flags);
 	xhci_create_rhub_port_array(xhci, &xhci->usb3_rhub, flags);
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index d7e0e6ebf080..fac9492a8bda 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -59,6 +59,7 @@
 #define PCI_DEVICE_ID_INTEL_TIGER_LAKE_XHCI		0x9a13
 #define PCI_DEVICE_ID_INTEL_MAPLE_RIDGE_XHCI		0x1138
 #define PCI_DEVICE_ID_INTEL_ALDER_LAKE_XHCI		0x461e
+#define PCI_DEVICE_ID_INTEL_ALDER_LAKE_N_XHCI		0x464e
 #define PCI_DEVICE_ID_INTEL_ALDER_LAKE_PCH_XHCI	0x51ed
 
 #define PCI_DEVICE_ID_AMD_RENOIR_XHCI			0x1639
@@ -129,8 +130,7 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 				pdev->revision == 0x0) {
 			xhci->quirks |= XHCI_RESET_EP_QUIRK;
 			xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
-				"QUIRK: Fresco Logic xHC needs configure"
-				" endpoint cmd after reset endpoint");
+				"XHCI_RESET_EP_QUIRK for this evaluation HW is deprecated");
 		}
 		if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
 				pdev->revision == 0x4) {
@@ -268,6 +268,7 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 	     pdev->device == PCI_DEVICE_ID_INTEL_TIGER_LAKE_XHCI ||
 	     pdev->device == PCI_DEVICE_ID_INTEL_MAPLE_RIDGE_XHCI ||
 	     pdev->device == PCI_DEVICE_ID_INTEL_ALDER_LAKE_XHCI ||
+	     pdev->device == PCI_DEVICE_ID_INTEL_ALDER_LAKE_N_XHCI ||
 	     pdev->device == PCI_DEVICE_ID_INTEL_ALDER_LAKE_PCH_XHCI))
 		xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
 
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 649ffd861b44..044855818cb1 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -180,7 +180,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	struct device		*sysdev, *tmpdev;
 	struct xhci_hcd		*xhci;
 	struct resource         *res;
-	struct usb_hcd		*hcd;
+	struct usb_hcd		*hcd, *usb3_hcd;
 	int			ret;
 	int			irq;
 	struct xhci_plat_priv	*priv = NULL;
@@ -245,6 +245,8 @@ static int xhci_plat_probe(struct platform_device *pdev)
 
 	xhci = hcd_to_xhci(hcd);
 
+	xhci->allow_single_roothub = 1;
+
 	/*
 	 * Not all platforms have clks so it is not an error if the
 	 * clock do not exist.
@@ -283,12 +285,6 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	device_set_wakeup_capable(&pdev->dev, true);
 
 	xhci->main_hcd = hcd;
-	xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
-			dev_name(&pdev->dev), hcd);
-	if (!xhci->shared_hcd) {
-		ret = -ENOMEM;
-		goto disable_clk;
-	}
 
 	/* imod_interval is the interrupt moderation value in nanoseconds. */
 	xhci->imod_interval = 40000;
@@ -313,16 +309,16 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (IS_ERR(hcd->usb_phy)) {
 		ret = PTR_ERR(hcd->usb_phy);
 		if (ret == -EPROBE_DEFER)
-			goto put_usb3_hcd;
+			goto disable_clk;
 		hcd->usb_phy = NULL;
 	} else {
 		ret = usb_phy_init(hcd->usb_phy);
 		if (ret)
-			goto put_usb3_hcd;
+			goto disable_clk;
 	}
 
 	hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node);
-	xhci->shared_hcd->tpl_support = hcd->tpl_support;
+
 	if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))
 		hcd->skip_phy_initialization = 1;
 
@@ -333,12 +329,26 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (ret)
 		goto disable_usb_phy;
 
-	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
-		xhci->shared_hcd->can_do_streams = 1;
+	if (!xhci_has_one_roothub(xhci)) {
+		xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
+						    dev_name(&pdev->dev), hcd);
+		if (!xhci->shared_hcd) {
+			ret = -ENOMEM;
+			goto dealloc_usb2_hcd;
+		}
 
-	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
-	if (ret)
-		goto dealloc_usb2_hcd;
+		xhci->shared_hcd->tpl_support = hcd->tpl_support;
+	}
+
+	usb3_hcd = xhci_get_usb3_hcd(xhci);
+	if (usb3_hcd && HCC_MAX_PSA(xhci->hcc_params) >= 4)
+		usb3_hcd->can_do_streams = 1;
+
+	if (xhci->shared_hcd) {
+		ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
+		if (ret)
+			goto put_usb3_hcd;
+	}
 
 	device_enable_async_suspend(&pdev->dev);
 	pm_runtime_put_noidle(&pdev->dev);
@@ -352,15 +362,15 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	return 0;
 
 
+put_usb3_hcd:
+	usb_put_hcd(xhci->shared_hcd);
+
 dealloc_usb2_hcd:
 	usb_remove_hcd(hcd);
 
 disable_usb_phy:
 	usb_phy_shutdown(hcd->usb_phy);
 
-put_usb3_hcd:
-	usb_put_hcd(xhci->shared_hcd);
-
 disable_clk:
 	clk_disable_unprepare(xhci->clk);
 
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index f9707997969d..46d0b9ad6f74 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -740,14 +740,6 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
 	}
 }
 
-static void xhci_stop_watchdog_timer_in_irq(struct xhci_hcd *xhci,
-		struct xhci_virt_ep *ep)
-{
-	ep->ep_state &= ~EP_STOP_CMD_PENDING;
-	/* Can't del_timer_sync in interrupt */
-	del_timer(&ep->stop_cmd_timer);
-}
-
 /*
  * Must be called with xhci->lock held in interrupt context,
  * releases and re-acquires xhci->lock
@@ -1122,18 +1114,17 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
 							  reset_type);
 			if (err)
 				break;
-			xhci_stop_watchdog_timer_in_irq(xhci, ep);
+			ep->ep_state &= ~EP_STOP_CMD_PENDING;
 			return;
 		case EP_STATE_RUNNING:
 			/* Race, HW handled stop ep cmd before ep was running */
 			xhci_dbg(xhci, "Stop ep completion ctx error, ep is running\n");
 
 			command = xhci_alloc_command(xhci, false, GFP_ATOMIC);
-			if (!command)
-				xhci_stop_watchdog_timer_in_irq(xhci, ep);
-
-			mod_timer(&ep->stop_cmd_timer,
-				  jiffies + XHCI_STOP_EP_CMD_TIMEOUT * HZ);
+			if (!command) {
+				ep->ep_state &= ~EP_STOP_CMD_PENDING;
+				return;
+			}
 			xhci_queue_stop_endpoint(xhci, command, slot_id, ep_index, 0);
 			xhci_ring_cmd_db(xhci);
 
@@ -1142,9 +1133,10 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
 			break;
 		}
 	}
+
 	/* will queue a set TR deq if stopped on a cancelled, uncleared TD */
 	xhci_invalidate_cancelled_tds(ep);
-	xhci_stop_watchdog_timer_in_irq(xhci, ep);
+	ep->ep_state &= ~EP_STOP_CMD_PENDING;
 
 	/* Otherwise ring the doorbell(s) to restart queued transfers */
 	xhci_giveback_invalidated_tds(ep);
@@ -1248,61 +1240,6 @@ void xhci_hc_died(struct xhci_hcd *xhci)
 		usb_hc_died(xhci_to_hcd(xhci));
 }
 
-/* Watchdog timer function for when a stop endpoint command fails to complete.
- * In this case, we assume the host controller is broken or dying or dead.  The
- * host may still be completing some other events, so we have to be careful to
- * let the event ring handler and the URB dequeueing/enqueueing functions know
- * through xhci->state.
- *
- * The timer may also fire if the host takes a very long time to respond to the
- * command, and the stop endpoint command completion handler cannot delete the
- * timer before the timer function is called.  Another endpoint cancellation may
- * sneak in before the timer function can grab the lock, and that may queue
- * another stop endpoint command and add the timer back.  So we cannot use a
- * simple flag to say whether there is a pending stop endpoint command for a
- * particular endpoint.
- *
- * Instead we use a combination of that flag and checking if a new timer is
- * pending.
- */
-void xhci_stop_endpoint_command_watchdog(struct timer_list *t)
-{
-	struct xhci_virt_ep *ep = from_timer(ep, t, stop_cmd_timer);
-	struct xhci_hcd *xhci = ep->xhci;
-	unsigned long flags;
-	u32 usbsts;
-	char str[XHCI_MSG_MAX];
-
-	spin_lock_irqsave(&xhci->lock, flags);
-
-	/* bail out if cmd completed but raced with stop ep watchdog timer.*/
-	if (!(ep->ep_state & EP_STOP_CMD_PENDING) ||
-	    timer_pending(&ep->stop_cmd_timer)) {
-		spin_unlock_irqrestore(&xhci->lock, flags);
-		xhci_dbg(xhci, "Stop EP timer raced with cmd completion, exit");
-		return;
-	}
-	usbsts = readl(&xhci->op_regs->status);
-
-	xhci_warn(xhci, "xHCI host not responding to stop endpoint command.\n");
-	xhci_warn(xhci, "USBSTS:%s\n", xhci_decode_usbsts(str, usbsts));
-
-	ep->ep_state &= ~EP_STOP_CMD_PENDING;
-
-	xhci_halt(xhci);
-
-	/*
-	 * handle a stop endpoint cmd timeout as if host died (-ENODEV).
-	 * In the future we could distinguish between -ENODEV and -ETIMEDOUT
-	 * and try to recover a -ETIMEDOUT with a host controller reset
-	 */
-	xhci_hc_died(xhci);
-
-	spin_unlock_irqrestore(&xhci->lock, flags);
-	xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
-			"xHCI host controller is dead.");
-}
-
 static void update_ring_for_set_deq_completion(struct xhci_hcd *xhci,
 		struct xhci_virt_device *dev,
 		struct xhci_ring *ep_ring,
@@ -1489,8 +1426,6 @@ static void xhci_handle_cmd_reset_ep(struct xhci_hcd *xhci, int slot_id,
 	/* Cleanup cancelled TDs as ep is stopped. May queue a Set TR Deq cmd */
 	xhci_invalidate_cancelled_tds(ep);
 
-	if (xhci->quirks & XHCI_RESET_EP_QUIRK)
-		xhci_dbg(xhci, "Note: Removed workaround to queue config ep for this hw");
 	/* Clear our internal halted state */
 	ep->ep_state &= ~EP_HALTED;
 
@@ -1534,17 +1469,13 @@ static void xhci_handle_cmd_config_ep(struct xhci_hcd *xhci, int slot_id,
 	struct xhci_input_control_ctx *ctrl_ctx;
 	struct xhci_ep_ctx *ep_ctx;
 	unsigned int ep_index;
-	unsigned int ep_state;
-	u32 add_flags, drop_flags;
+	u32 add_flags;
 
 	/*
-	 * Configure endpoint commands can come from the USB core
-	 * configuration or alt setting changes, or because the HW
-	 * needed an extra configure endpoint command after a reset
-	 * endpoint command or streams were being configured.
-	 * If the command was for a halted endpoint, the xHCI driver
-	 * is not waiting on the configure endpoint command.
+	 * Configure endpoint commands can come from the USB core configuration
+	 * or alt setting changes, or when streams were being configured.
 	 */
+
 	virt_dev = xhci->devs[slot_id];
 	if (!virt_dev)
 		return;
@@ -1555,34 +1486,13 @@ static void xhci_handle_cmd_config_ep(struct xhci_hcd *xhci, int slot_id,
 	}
 
 	add_flags = le32_to_cpu(ctrl_ctx->add_flags);
-	drop_flags = le32_to_cpu(ctrl_ctx->drop_flags);
+
 	/* Input ctx add_flags are the endpoint index plus one */
 	ep_index = xhci_last_valid_endpoint(add_flags) - 1;
 
 	ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->out_ctx, ep_index);
 	trace_xhci_handle_cmd_config_ep(ep_ctx);
 
-	/* A usb_set_interface() call directly after clearing a halted
-	 * condition may race on this quirky hardware.  Not worth
-	 * worrying about, since this is prototype hardware.  Not sure
-	 * if this will work for streams, but streams support was
-	 * untested on this prototype.
-	 */
-	if (xhci->quirks & XHCI_RESET_EP_QUIRK &&
-			ep_index != (unsigned int) -1 &&
-			add_flags - SLOT_FLAG == drop_flags) {
-		ep_state = virt_dev->eps[ep_index].ep_state;
-		if (!(ep_state & EP_HALTED))
-			return;
-		xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
-				"Completed config ep cmd - "
-				"last ep index = %d, state = %d",
-				ep_index, ep_state);
-		/* Clear internal halted state and restart ring(s) */
-		virt_dev->eps[ep_index].ep_state &= ~EP_HALTED;
-		ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
-		return;
-	}
 	return;
 }
 
@@ -1650,9 +1560,12 @@ void xhci_cleanup_command_queue(struct xhci_hcd *xhci)
 
 void xhci_handle_command_timeout(struct work_struct *work)
 {
-	struct xhci_hcd *xhci;
-	unsigned long flags;
-	u64 hw_ring_state;
+	struct xhci_hcd	*xhci;
+	unsigned long	flags;
+	char		str[XHCI_MSG_MAX];
+	u64		hw_ring_state;
+	u32		cmd_field3;
+	u32		usbsts;
 
 	xhci = container_of(to_delayed_work(work), struct xhci_hcd, cmd_timer);
 
@@ -1666,6 +1579,27 @@ void xhci_handle_command_timeout(struct work_struct *work)
 		spin_unlock_irqrestore(&xhci->lock, flags);
 		return;
 	}
+
+	cmd_field3 = le32_to_cpu(xhci->current_cmd->command_trb->generic.field[3]);
+	usbsts = readl(&xhci->op_regs->status);
+	xhci_dbg(xhci, "Command timeout, USBSTS:%s\n", xhci_decode_usbsts(str, usbsts));
+
+	/* Bail out and tear down xhci if a stop endpoint command failed */
+	if (TRB_FIELD_TO_TYPE(cmd_field3) == TRB_STOP_RING) {
+		struct xhci_virt_ep	*ep;
+
+		xhci_warn(xhci, "xHCI host not responding to stop endpoint command\n");
+
+		ep = xhci_get_virt_ep(xhci, TRB_TO_SLOT_ID(cmd_field3),
+				      TRB_TO_EP_INDEX(cmd_field3));
+		if (ep)
+			ep->ep_state &= ~EP_STOP_CMD_PENDING;
+
+		xhci_halt(xhci);
+		xhci_hc_died(xhci);
+		goto time_out_completed;
+	}
+
 	/* mark this command to be cancelled */
 	xhci->current_cmd->status = COMP_COMMAND_ABORTED;
 
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 25b87e99b4dd..f0ab63138016 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -486,6 +486,10 @@ static void compliance_mode_recovery(struct timer_list *t)
 
 	xhci = from_timer(xhci, t, comp_mode_recovery_timer);
 	rhub = &xhci->usb3_rhub;
+	hcd = rhub->hcd;
+
+	if (!hcd)
+		return;
 
 	for (i = 0; i < rhub->num_ports; i++) {
 		temp = readl(rhub->ports[i]->addr);
@@ -499,7 +503,6 @@ static void compliance_mode_recovery(struct timer_list *t)
 					i + 1);
 			xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
 					"Attempting compliance mode recovery");
-			hcd = xhci->shared_hcd;
 
 			if (hcd->state == HC_STATE_SUSPENDED)
 				usb_hcd_resume_root_hub(hcd);
@@ -612,14 +615,11 @@ static int xhci_run_finished(struct xhci_hcd *xhci)
 		xhci_halt(xhci);
 		return -ENODEV;
 	}
-	xhci->shared_hcd->state = HC_STATE_RUNNING;
 	xhci->cmd_ring_state = CMD_RING_STATE_RUNNING;
 
 	if (xhci->quirks & XHCI_NEC_HOST)
 		xhci_ring_cmd_db(xhci);
 
-	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
-			"Finished xhci_run for USB3 roothub");
 	return 0;
 }
 
@@ -694,12 +694,17 @@ int xhci_run(struct usb_hcd *hcd)
 			xhci_free_command(xhci, command);
 	}
 	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
-			"Finished xhci_run for USB2 roothub");
+			"Finished %s for main hcd", __func__);
 
 	xhci_create_dbc_dev(xhci);
 
 	xhci_debugfs_init(xhci);
 
+	if (xhci_has_one_roothub(xhci))
+		return xhci_run_finished(xhci);
+
+	set_bit(HCD_FLAG_DEFER_RH_REGISTER, &hcd->flags);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(xhci_run);
@@ -992,7 +997,7 @@ int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup)
 		return 0;
 
 	if (hcd->state != HC_STATE_SUSPENDED ||
-			xhci->shared_hcd->state != HC_STATE_SUSPENDED)
+	    (xhci->shared_hcd && xhci->shared_hcd->state != HC_STATE_SUSPENDED))
 		return -EINVAL;
 
 	/* Clear root port wake on bits if wakeup not allowed. */
@@ -1009,15 +1014,18 @@ int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup)
 		 __func__, hcd->self.busnum);
 	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 	del_timer_sync(&hcd->rh_timer);
-	clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
-	del_timer_sync(&xhci->shared_hcd->rh_timer);
+	if (xhci->shared_hcd) {
+		clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
+		del_timer_sync(&xhci->shared_hcd->rh_timer);
+	}
 
 	if (xhci->quirks & XHCI_SUSPEND_DELAY)
 		usleep_range(1000, 1500);
 
 	spin_lock_irq(&xhci->lock);
 	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
-	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags);
+	if (xhci->shared_hcd)
+		clear_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags);
 	/* step 1: stop endpoint */
 	/* skipped assuming that port suspend has done */
 
@@ -1117,7 +1125,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 		msleep(100);
 
 	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
-	set_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags);
+	if (xhci->shared_hcd)
+		set_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags);
 
 	spin_lock_irq(&xhci->lock);
 
@@ -1177,7 +1186,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 
 		/* Let the USB core know _both_ roothubs lost power. */
 		usb_root_hub_lost_power(xhci->main_hcd->self.root_hub);
-		usb_root_hub_lost_power(xhci->shared_hcd->self.root_hub);
+		if (xhci->shared_hcd)
+			usb_root_hub_lost_power(xhci->shared_hcd->self.root_hub);
 
 		xhci_dbg(xhci, "Stop HCD\n");
 		xhci_halt(xhci);
@@ -1217,12 +1227,13 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 
 		xhci_dbg(xhci, "Start the primary HCD\n");
 		retval = xhci_run(hcd->primary_hcd);
-		if (!retval) {
+		if (!retval && secondary_hcd) {
 			xhci_dbg(xhci, "Start the secondary HCD\n");
 			retval = xhci_run(secondary_hcd);
 		}
 		hcd->state = HC_STATE_SUSPENDED;
-		xhci->shared_hcd->state = HC_STATE_SUSPENDED;
+		if (xhci->shared_hcd)
+			xhci->shared_hcd->state = HC_STATE_SUSPENDED;
 		goto done;
 	}
 
@@ -1260,7 +1271,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 		}
 
 		if (pending_portevent) {
-			usb_hcd_resume_root_hub(xhci->shared_hcd);
+			if (xhci->shared_hcd)
+				usb_hcd_resume_root_hub(xhci->shared_hcd);
 			usb_hcd_resume_root_hub(hcd);
 		}
 	}
@@ -1279,8 +1291,10 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 	/* Re-enable port polling. */
 	xhci_dbg(xhci, "%s: starting usb%d port polling.\n",
 		 __func__, hcd->self.busnum);
-	set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
-	usb_hcd_poll_rh_status(xhci->shared_hcd);
+	if (xhci->shared_hcd) {
+		set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
+		usb_hcd_poll_rh_status(xhci->shared_hcd);
+	}
 	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 	usb_hcd_poll_rh_status(hcd);
 
@@ -1860,9 +1874,6 @@ static int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 			goto done;
 		}
 		ep->ep_state |= EP_STOP_CMD_PENDING;
-		ep->stop_cmd_timer.expires = jiffies +
-			XHCI_STOP_EP_CMD_TIMEOUT * HZ;
-		add_timer(&ep->stop_cmd_timer);
 		xhci_queue_stop_endpoint(xhci, command, urb->dev->slot_id,
 					 ep_index, 0);
 		xhci_ring_cmd_db(xhci);
@@ -3972,10 +3983,8 @@ static void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
 	trace_xhci_free_dev(slot_ctx);
 
 	/* Stop any wayward timer functions (which may grab the lock) */
-	for (i = 0; i < 31; i++) {
+	for (i = 0; i < 31; i++)
 		virt_dev->eps[i].ep_state &= ~EP_STOP_CMD_PENDING;
-		del_timer_sync(&virt_dev->eps[i].stop_cmd_timer);
-	}
 	virt_dev->udev = NULL;
 	xhci_disable_slot(xhci, udev->slot_id);
 	xhci_free_virt_device(xhci, udev->slot_id);
@@ -4879,9 +4888,6 @@ static int xhci_check_intel_tier_policy(struct usb_device *udev,
 	struct usb_device *parent;
 	unsigned int num_hubs;
 
-	if (state == USB3_LPM_U2)
-		return 0;
-
 	/* Don't enable U1 if the device is on a 2nd tier hub or lower. */
 	for (parent = udev->parent, num_hubs = 0; parent->parent;
 			parent = parent->parent)
@@ -4890,7 +4896,7 @@ static int xhci_check_intel_tier_policy(struct usb_device *udev,
 	if (num_hubs < 2)
 		return 0;
 
-	dev_dbg(&udev->dev, "Disabling U1 link state for device"
+	dev_dbg(&udev->dev, "Disabling U1/U2 link state for device"
 			" below second-tier hub.\n");
 	dev_dbg(&udev->dev, "Plug device into first-tier hub "
 			"to decrease power consumption.\n");
@@ -4931,9 +4937,6 @@ static u16 xhci_calculate_lpm_timeout(struct usb_hcd *hcd,
 		return timeout;
 	}
 
-	if (xhci_check_tier_policy(xhci, udev, state) < 0)
-		return timeout;
-
 	/* Gather some information about the currently installed configuration
 	 * and alternate interface settings.
 	 */
@@ -5040,6 +5043,9 @@ static int xhci_enable_usb3_lpm_timeout(struct usb_hcd *hcd,
 			!xhci->devs[udev->slot_id])
 		return USB3_LPM_DISABLED;
 
+	if (xhci_check_tier_policy(xhci, udev, state) < 0)
+		return USB3_LPM_DISABLED;
+
 	hub_encoded_timeout = xhci_calculate_lpm_timeout(hcd, udev, state);
 	mel = calculate_max_exit_latency(udev, state, hub_encoded_timeout);
 	if (mel < 0) {
@@ -5207,6 +5213,57 @@ static int xhci_get_frame(struct usb_hcd *hcd)
 	return readl(&xhci->run_regs->microframe_index) >> 3;
 }
 
+static void xhci_hcd_init_usb2_data(struct xhci_hcd *xhci, struct usb_hcd *hcd)
+{
+	xhci->usb2_rhub.hcd = hcd;
+	hcd->speed = HCD_USB2;
+	hcd->self.root_hub->speed = USB_SPEED_HIGH;
+	/*
+	 * USB 2.0 roothub under xHCI has an integrated TT,
+	 * (rate matching hub) as opposed to having an OHCI/UHCI
+	 * companion controller.
+	 */
+	hcd->has_tt = 1;
+}
+
+static void xhci_hcd_init_usb3_data(struct xhci_hcd *xhci, struct usb_hcd *hcd)
+{
+	unsigned int minor_rev;
+
+	/*
+	 * Early xHCI 1.1 spec did not mention USB 3.1 capable hosts
+	 * should return 0x31 for sbrn, or that the minor revision
+	 * is a two digit BCD containig minor and sub-minor numbers.
+	 * This was later clarified in xHCI 1.2.
+	 *
+	 * Some USB 3.1 capable hosts therefore have sbrn 0x30, and
+	 * minor revision set to 0x1 instead of 0x10.
+	 */
+	if (xhci->usb3_rhub.min_rev == 0x1)
+		minor_rev = 1;
+	else
+		minor_rev = xhci->usb3_rhub.min_rev / 0x10;
+
+	switch (minor_rev) {
+	case 2:
+		hcd->speed = HCD_USB32;
+		hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS;
+		hcd->self.root_hub->rx_lanes = 2;
+		hcd->self.root_hub->tx_lanes = 2;
+		hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x2;
+		break;
+	case 1:
+		hcd->speed = HCD_USB31;
+		hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS;
+		hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x1;
+		break;
+	}
+	xhci_info(xhci, "Host supports USB 3.%x %sSuperSpeed\n",
+		  minor_rev, minor_rev ? "Enhanced " : "");
+
+	xhci->usb3_rhub.hcd = hcd;
+}
+
 int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
 {
 	struct xhci_hcd		*xhci;
@@ -5215,7 +5272,6 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
 	 * quirks
 	 */
 	struct device		*dev = hcd->self.sysdev;
-	unsigned int		minor_rev;
 	int			retval;
 
 	/* Accept arbitrarily long scatter-gather lists */
@@ -5229,61 +5285,13 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
 
 	xhci = hcd_to_xhci(hcd);
 
-	if (usb_hcd_is_primary_hcd(hcd)) {
-		xhci->main_hcd = hcd;
-		xhci->usb2_rhub.hcd = hcd;
-		/* Mark the first roothub as being USB 2.0.
-		 * The xHCI driver will register the USB 3.0 roothub.
-		 */
-		hcd->speed = HCD_USB2;
-		hcd->self.root_hub->speed = USB_SPEED_HIGH;
-		/*
-		 * USB 2.0 roothub under xHCI has an integrated TT,
-		 * (rate matching hub) as opposed to having an OHCI/UHCI
-		 * companion controller.
-		 */
-		hcd->has_tt = 1;
-	} else {
-		/*
-		 * Early xHCI 1.1 spec did not mention USB 3.1 capable hosts
-		 * should return 0x31 for sbrn, or that the minor revision
-		 * is a two digit BCD containig minor and sub-minor numbers.
-		 * This was later clarified in xHCI 1.2.
-		 *
-		 * Some USB 3.1 capable hosts therefore have sbrn 0x30, and
-		 * minor revision set to 0x1 instead of 0x10.
-		 */
-		if (xhci->usb3_rhub.min_rev == 0x1)
-			minor_rev = 1;
-		else
-			minor_rev = xhci->usb3_rhub.min_rev / 0x10;
-
-		switch (minor_rev) {
-		case 2:
-			hcd->speed = HCD_USB32;
-			hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS;
-			hcd->self.root_hub->rx_lanes = 2;
-			hcd->self.root_hub->tx_lanes = 2;
-			hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x2;
-			break;
-		case 1:
-			hcd->speed = HCD_USB31;
-			hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS;
-			hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x1;
-			break;
-		}
-		xhci_info(xhci, "Host supports USB 3.%x %sSuperSpeed\n",
-			  minor_rev,
-			  minor_rev ? "Enhanced " : "");
-
-		xhci->usb3_rhub.hcd = hcd;
-		/* xHCI private pointer was set in xhci_pci_probe for the second
-		 * registered roothub.
-		 */
+	if (!usb_hcd_is_primary_hcd(hcd)) {
+		xhci_hcd_init_usb3_data(xhci, hcd);
 		return 0;
 	}
 
 	mutex_init(&xhci->mutex);
+	xhci->main_hcd = hcd;
 	xhci->cap_regs = hcd->regs;
 	xhci->op_regs = hcd->regs +
 		HC_LENGTH(readl(&xhci->cap_regs->hc_capbase));
@@ -5358,6 +5366,11 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
 		return retval;
 	xhci_dbg(xhci, "Called HCD init\n");
 
+	if (xhci_hcd_is_usb3(hcd))
+		xhci_hcd_init_usb3_data(xhci, hcd);
+	else
+		xhci_hcd_init_usb2_data(xhci, hcd);
+
 	xhci_info(xhci, "hcc params 0x%08x hci version 0x%x quirks 0x%016llx\n",
 		  xhci->hcc_params, xhci->hci_version, xhci->quirks);
 
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 473a33ce299e..0bd76c94a4b1 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -948,8 +948,6 @@ struct xhci_virt_ep {
 #define EP_CLEARING_TT		(1 << 8)
 	/* ----  Related to URB cancellation ---- */
 	struct list_head	cancelled_td_list;
-	/* Watchdog timer for stop endpoint command to cancel URBs */
-	struct timer_list	stop_cmd_timer;
 	struct xhci_hcd		*xhci;
 	/* Dequeue pointer and dequeue segment for a submitted Set TR Dequeue
 	 * command.  We'll need to update the ring's dequeue segment and dequeue
@@ -1848,7 +1846,7 @@ struct xhci_hcd {
 #define XHCI_STATE_REMOVING	(1 << 2)
 	unsigned long long	quirks;
 #define	XHCI_LINK_TRB_QUIRK	BIT_ULL(0)
-#define XHCI_RESET_EP_QUIRK	BIT_ULL(1)
+#define XHCI_RESET_EP_QUIRK	BIT_ULL(1) /* Deprecated */
 #define XHCI_NEC_HOST		BIT_ULL(2)
 #define XHCI_AMD_PLL_FIX	BIT_ULL(3)
 #define XHCI_SPURIOUS_SUCCESS	BIT_ULL(4)
@@ -1911,6 +1909,8 @@ struct xhci_hcd {
 	unsigned		hw_lpm_support:1;
 	/* Broken Suspend flag for SNPS Suspend resume issue */
 	unsigned		broken_suspend:1;
+	/* Indicates that omitting hcd is supported if root hub has no ports */
+	unsigned		allow_single_roothub:1;
 	/* cached usb2 extened protocol capabilites */
 	u32                     *ext_caps;
 	unsigned int            num_ext_caps;
@@ -1966,6 +1966,30 @@ static inline struct usb_hcd *xhci_to_hcd(struct xhci_hcd *xhci)
 	return xhci->main_hcd;
 }
 
+static inline struct usb_hcd *xhci_get_usb3_hcd(struct xhci_hcd *xhci)
+{
+	if (xhci->shared_hcd)
+		return xhci->shared_hcd;
+
+	if (!xhci->usb2_rhub.num_ports)
+		return xhci->main_hcd;
+
+	return NULL;
+}
+
+static inline bool xhci_hcd_is_usb3(struct usb_hcd *hcd)
+{
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+	return hcd == xhci_get_usb3_hcd(xhci);
+}
+
+static inline bool xhci_has_one_roothub(struct xhci_hcd *xhci)
+{
+	return xhci->allow_single_roothub &&
+	       (!xhci->usb2_rhub.num_ports || !xhci->usb3_rhub.num_ports);
+}
+
 #define xhci_dbg(xhci, fmt, args...) \
 	dev_dbg(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
 #define xhci_err(xhci, fmt, args...) \
diff --git a/drivers/usb/isp1760/isp1760-core.c b/drivers/usb/isp1760/isp1760-core.c
index d1d9a7d5da17..af88f4fe00d2 100644
--- a/drivers/usb/isp1760/isp1760-core.c
+++ b/drivers/usb/isp1760/isp1760-core.c
@@ -251,6 +251,8 @@ static const struct reg_field isp1760_hc_reg_fields[] = {
 	[HW_DM_PULLDOWN]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 2, 2),
 	[HW_DP_PULLDOWN]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 1, 1),
 	[HW_DP_PULLUP]		= REG_FIELD(ISP176x_HC_OTG_CTRL, 0, 0),
+	/* Make sure the array is sized properly during compilation */
+	[HC_FIELD_MAX]		= {},
 };
 
 static const struct reg_field isp1763_hc_reg_fields[] = {
@@ -321,6 +323,8 @@ static const struct reg_field isp1763_hc_reg_fields[] = {
 	[HW_DM_PULLDOWN_CLEAR]	= REG_FIELD(ISP1763_HC_OTG_CTRL_CLEAR, 2, 2),
 	[HW_DP_PULLDOWN_CLEAR]	= REG_FIELD(ISP1763_HC_OTG_CTRL_CLEAR, 1, 1),
 	[HW_DP_PULLUP_CLEAR]	= REG_FIELD(ISP1763_HC_OTG_CTRL_CLEAR, 0, 0),
+	/* Make sure the array is sized properly during compilation */
+	[HC_FIELD_MAX]		= {},
 };
 
 static const struct regmap_range isp1763_hc_volatile_ranges[] = {
@@ -405,6 +409,8 @@ static const struct reg_field isp1761_dc_reg_fields[] = {
 	[DC_CHIP_ID_HIGH]	= REG_FIELD(ISP176x_DC_CHIPID, 16, 31),
 	[DC_CHIP_ID_LOW]	= REG_FIELD(ISP176x_DC_CHIPID, 0, 15),
 	[DC_SCRATCH]		= REG_FIELD(ISP176x_DC_SCRATCH, 0, 15),
+	/* Make sure the array is sized properly during compilation */
+	[DC_FIELD_MAX]		= {},
 };
 
 static const struct regmap_range isp1763_dc_volatile_ranges[] = {
@@ -458,6 +464,8 @@ static const struct reg_field isp1763_dc_reg_fields[] = {
 	[DC_CHIP_ID_HIGH]	= REG_FIELD(ISP1763_DC_CHIPID_HIGH, 0, 15),
 	[DC_CHIP_ID_LOW]	= REG_FIELD(ISP1763_DC_CHIPID_LOW, 0, 15),
 	[DC_SCRATCH]		= REG_FIELD(ISP1763_DC_SCRATCH, 0, 15),
+	/* Make sure the array is sized properly during compilation */
+	[DC_FIELD_MAX]		= {},
 };
 
 static const struct regmap_config isp1763_dc_regmap_conf = {
diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c
index 893becb077d3..76862ba40f35 100644
--- a/drivers/usb/isp1760/isp1760-hcd.c
+++ b/drivers/usb/isp1760/isp1760-hcd.c
@@ -825,8 +825,7 @@ static void create_ptd_atl(struct isp1760_qh *qh,
 	memset(ptd, 0, sizeof(*ptd));
 
 	/* according to 3.6.2, max packet len can not be > 0x400 */
-	maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe,
-						usb_pipeout(qtd->urb->pipe));
+	maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe);
 	multi =  1 + ((maxpacket >> 11) & 0x3);
 	maxpacket &= 0x7ff;
 
@@ -1808,8 +1807,7 @@ static void packetize_urb(struct usb_hcd *hcd,
 			packet_type = IN_PID;
 	}
 
-	maxpacketsize = usb_maxpacket(urb->dev, urb->pipe,
-				      usb_pipeout(urb->pipe));
+	maxpacketsize = usb_maxpacket(urb->dev, urb->pipe);
 
 	/*
 	 * buffer gets wrapped in one or more qtds;
diff --git a/drivers/usb/misc/ftdi-elan.c b/drivers/usb/misc/ftdi-elan.c
index 6c38c62d29b2..b2f980409d0b 100644
--- a/drivers/usb/misc/ftdi-elan.c
+++ b/drivers/usb/misc/ftdi-elan.c
@@ -1449,8 +1449,7 @@ wait:if (ftdi->disconnected > 0) {
 			command->length = 0x8007;
 			command->address = (toggle_bits << 6) | (ep_number << 2)
 				| (address << 0);
-			command->width = usb_maxpacket(urb->dev, urb->pipe,
-						       usb_pipeout(urb->pipe));
+			command->width = usb_maxpacket(urb->dev, urb->pipe);
 			command->follows = 8;
 			command->value = 0;
 			command->buffer = urb->setup_packet;
@@ -1514,8 +1513,7 @@ wait:if (ftdi->disconnected > 0) {
 							    1);
 			command->address = (toggle_bits << 6) | (ep_number << 2)
 				| (address << 0);
-			command->width = usb_maxpacket(urb->dev, urb->pipe,
-						       usb_pipeout(urb->pipe));
+			command->width = usb_maxpacket(urb->dev, urb->pipe);
 			command->follows = 0;
 			command->value = 0;
 			command->buffer = NULL;
@@ -1571,8 +1569,7 @@ wait:if (ftdi->disconnected > 0) {
 			command->length = 0x0000;
 			command->address = (toggle_bits << 6) | (ep_number << 2)
 				| (address << 0);
-			command->width = usb_maxpacket(urb->dev, urb->pipe,
-						       usb_pipeout(urb->pipe));
+			command->width = usb_maxpacket(urb->dev, urb->pipe);
 			command->follows = 0;
 			command->value = 0;
 			command->buffer = NULL;
@@ -1634,8 +1631,7 @@ wait:if (ftdi->disconnected > 0) {
 			command->header = 0x81 | (ed << 5);
 			command->address = (toggle_bits << 6) | (ep_number << 2)
 				| (address << 0);
-			command->width = usb_maxpacket(urb->dev, urb->pipe,
-						       usb_pipeout(urb->pipe));
+			command->width = usb_maxpacket(urb->dev, urb->pipe);
 			command->follows = min_t(u32, 1024,
 						 urb->transfer_buffer_length -
 						 urb->actual_length);
@@ -1715,8 +1711,7 @@ wait:if (ftdi->disconnected > 0) {
 							    1);
 			command->address = (toggle_bits << 6) | (ep_number << 2)
 				| (address << 0);
-			command->width = usb_maxpacket(urb->dev, urb->pipe,
-						       usb_pipeout(urb->pipe));
+			command->width = usb_maxpacket(urb->dev, urb->pipe);
 			command->follows = 0;
 			command->value = 0;
 			command->buffer = NULL;
diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c
index f8686139d6f3..25ec5666a75e 100644
--- a/drivers/usb/misc/lvstest.c
+++ b/drivers/usb/misc/lvstest.c
@@ -437,7 +437,7 @@ static int lvs_rh_probe(struct usb_interface *intf,
 	INIT_WORK(&lvs->rh_work, lvs_rh_work);
 
 	pipe = usb_rcvintpipe(hdev, endpoint->bEndpointAddress);
-	maxp = usb_maxpacket(hdev, pipe, usb_pipeout(pipe));
+	maxp = usb_maxpacket(hdev, pipe);
 	usb_fill_int_urb(lvs->urb, hdev, pipe, &lvs->buffer[0], maxp,
 			lvs_rh_irq, lvs, endpoint->bInterval);
 
diff --git a/drivers/usb/musb/mediatek.c b/drivers/usb/musb/mediatek.c
index 1aeb34dbe24f..cad991380b0c 100644
--- a/drivers/usb/musb/mediatek.c
+++ b/drivers/usb/musb/mediatek.c
@@ -36,6 +36,8 @@
 #define DMA_INTR_STATUS_MSK	GENMASK(7, 0)
 #define DMA_INTR_UNMASK_SET_MSK	GENMASK(31, 24)
 
+#define MTK_MUSB_CLKS_NUM	3
+
 struct mtk_glue {
 	struct device *dev;
 	struct musb *musb;
@@ -44,9 +46,7 @@ struct mtk_glue {
 	struct phy *phy;
 	struct usb_phy *xceiv;
 	enum phy_mode phy_mode;
-	struct clk *main;
-	struct clk *mcu;
-	struct clk *univpll;
+	struct clk_bulk_data clks[MTK_MUSB_CLKS_NUM];
 	enum usb_role role;
 	struct usb_role_switch *role_sw;
 };
@@ -55,64 +55,11 @@ static int mtk_musb_clks_get(struct mtk_glue *glue)
 {
 	struct device *dev = glue->dev;
 
-	glue->main = devm_clk_get(dev, "main");
-	if (IS_ERR(glue->main)) {
-		dev_err(dev, "fail to get main clock\n");
-		return PTR_ERR(glue->main);
-	}
-
-	glue->mcu = devm_clk_get(dev, "mcu");
-	if (IS_ERR(glue->mcu)) {
-		dev_err(dev, "fail to get mcu clock\n");
-		return PTR_ERR(glue->mcu);
-	}
-
-	glue->univpll = devm_clk_get(dev, "univpll");
-	if (IS_ERR(glue->univpll)) {
-		dev_err(dev, "fail to get univpll clock\n");
-		return PTR_ERR(glue->univpll);
-	}
-
-	return 0;
-}
+	glue->clks[0].id = "main";
+	glue->clks[1].id = "mcu";
+	glue->clks[2].id = "univpll";
 
-static int mtk_musb_clks_enable(struct mtk_glue *glue)
-{
-	int ret;
-
-	ret = clk_prepare_enable(glue->main);
-	if (ret) {
-		dev_err(glue->dev, "failed to enable main clock\n");
-		goto err_main_clk;
-	}
-
-	ret = clk_prepare_enable(glue->mcu);
-	if (ret) {
-		dev_err(glue->dev, "failed to enable mcu clock\n");
-		goto err_mcu_clk;
-	}
-
-	ret = clk_prepare_enable(glue->univpll);
-	if (ret) {
-		dev_err(glue->dev, "failed to enable univpll clock\n");
-		goto err_univpll_clk;
-	}
-
-	return 0;
-
-err_univpll_clk:
-	clk_disable_unprepare(glue->mcu);
-err_mcu_clk:
-	clk_disable_unprepare(glue->main);
-err_main_clk:
-	return ret;
-}
-
-static void mtk_musb_clks_disable(struct mtk_glue *glue)
-{
-	clk_disable_unprepare(glue->univpll);
-	clk_disable_unprepare(glue->mcu);
-	clk_disable_unprepare(glue->main);
+	return devm_clk_bulk_get(dev, MTK_MUSB_CLKS_NUM, glue->clks);
 }
 
 static int mtk_otg_switch_set(struct mtk_glue *glue, enum usb_role role)
@@ -390,7 +337,7 @@ static int mtk_musb_exit(struct musb *musb)
 	mtk_otg_switch_exit(glue);
 	phy_power_off(glue->phy);
 	phy_exit(glue->phy);
-	mtk_musb_clks_disable(glue);
+	clk_bulk_disable_unprepare(MTK_MUSB_CLKS_NUM, glue->clks);
 
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);
@@ -528,7 +475,7 @@ static int mtk_musb_probe(struct platform_device *pdev)
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 
-	ret = mtk_musb_clks_enable(glue);
+	ret = clk_bulk_prepare_enable(MTK_MUSB_CLKS_NUM, glue->clks);
 	if (ret)
 		goto err_enable_clk;
 
@@ -551,7 +498,7 @@ static int mtk_musb_probe(struct platform_device *pdev)
 	return 0;
 
 err_device_register:
-	mtk_musb_clks_disable(glue);
+	clk_bulk_disable_unprepare(MTK_MUSB_CLKS_NUM, glue->clks);
 err_enable_clk:
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index d2b7e613eb34..f571a65ae6ee 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -362,6 +362,7 @@ static int omap2430_probe(struct platform_device *pdev)
 	control_node = of_parse_phandle(np, "ctrl-module", 0);
 	if (control_node) {
 		control_pdev = of_find_device_by_node(control_node);
+		of_node_put(control_node);
 		if (!control_pdev) {
 			dev_err(&pdev->dev, "Failed to get control device\n");
 			ret = -EINVAL;
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 49c08f07c969..b440d338a895 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1671,7 +1671,7 @@ static ssize_t latency_timer_show(struct device *dev,
 	if (priv->flags & ASYNC_LOW_LATENCY)
 		return sprintf(buf, "1\n");
 	else
-		return sprintf(buf, "%i\n", priv->latency);
+		return sprintf(buf, "%u\n", priv->latency);
 }
 
 /* Write a new value of the latency timer, in units of milliseconds. */
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 152ad882657d..e60425bbf537 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1137,6 +1137,8 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EM12, 0xff, 0, 0) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, 0x0620, 0xff, 0xff, 0x30) },	/* EM160R-GL */
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, 0x0620, 0xff, 0, 0) },
+	{ USB_DEVICE_INTERFACE_CLASS(QUECTEL_VENDOR_ID, 0x0700, 0xff), /* BG95 */
+	  .driver_info = RSVD(3) | ZLP },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_RM500Q, 0xff, 0xff, 0x30) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_RM500Q, 0xff, 0, 0) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_RM500Q, 0xff, 0xff, 0x10),
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 1d878d05a658..3506c47e1eef 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -421,6 +421,9 @@ static int pl2303_detect_type(struct usb_serial *serial)
 	bcdUSB = le16_to_cpu(desc->bcdUSB);
 
 	switch (bcdUSB) {
+	case 0x101:
+		/* USB 1.0.1? Let's assume they meant 1.1... */
+		fallthrough;
 	case 0x110:
 		switch (bcdDevice) {
 		case 0x300:
diff --git a/drivers/usb/storage/alauda.c b/drivers/usb/storage/alauda.c
index 20b857e97e60..747be69e5e69 100644
--- a/drivers/usb/storage/alauda.c
+++ b/drivers/usb/storage/alauda.c
@@ -1104,7 +1104,7 @@ static int init_alauda(struct us_data *us)
 
 	us->extra = kzalloc(sizeof(struct alauda_info), GFP_NOIO);
 	if (!us->extra)
-		return USB_STOR_TRANSPORT_ERROR;
+		return -ENOMEM;
 
 	info = (struct alauda_info *) us->extra;
 	us->extra_destructor = alauda_info_destructor;
@@ -1113,7 +1113,7 @@ static int init_alauda(struct us_data *us)
 		altsetting->endpoint[0].desc.bEndpointAddress
 		& USB_ENDPOINT_NUMBER_MASK);
 
-	return USB_STOR_TRANSPORT_GOOD;
+	return 0;
 }
 
 static int alauda_transport(struct scsi_cmnd *srb, struct us_data *us)
diff --git a/drivers/usb/storage/isd200.c b/drivers/usb/storage/isd200.c
index 05429f1f69f9..4e0eef1440b7 100644
--- a/drivers/usb/storage/isd200.c
+++ b/drivers/usb/storage/isd200.c
@@ -1449,7 +1449,7 @@ static void isd200_free_info_ptrs(void *info_)
  * Allocates (if necessary) and initializes the driver structure.
  *
  * RETURNS:
- *    ISD status code
+ *    error status code
  */
 static int isd200_init_info(struct us_data *us)
 {
@@ -1457,7 +1457,7 @@ static int isd200_init_info(struct us_data *us)
 
 	info = kzalloc(sizeof(struct isd200_info), GFP_KERNEL);
 	if (!info)
-		return ISD200_ERROR;
+		return -ENOMEM;
 
 	info->id = kzalloc(ATA_ID_WORDS * 2, GFP_KERNEL);
 	info->RegsBuf = kmalloc(sizeof(info->ATARegs), GFP_KERNEL);
@@ -1466,13 +1466,13 @@ static int isd200_init_info(struct us_data *us)
 	if (!info->id || !info->RegsBuf || !info->srb.sense_buffer) {
 		isd200_free_info_ptrs(info);
 		kfree(info);
-		return ISD200_ERROR;
+		return -ENOMEM;
 	}
 
 	us->extra = info;
 	us->extra_destructor = isd200_free_info_ptrs;
 
-	return ISD200_GOOD;
+	return 0;
 }
 
 /**************************************************************************
diff --git a/drivers/usb/storage/karma.c b/drivers/usb/storage/karma.c
index 05cec81dcd3f..38ddfedef629 100644
--- a/drivers/usb/storage/karma.c
+++ b/drivers/usb/storage/karma.c
@@ -174,24 +174,25 @@ static void rio_karma_destructor(void *extra)
 
 static int rio_karma_init(struct us_data *us)
 {
-	int ret = 0;
 	struct karma_data *data = kzalloc(sizeof(struct karma_data), GFP_NOIO);
 
 	if (!data)
-		goto out;
+		return -ENOMEM;
 
 	data->recv = kmalloc(RIO_RECV_LEN, GFP_NOIO);
 	if (!data->recv) {
 		kfree(data);
-		goto out;
+		return -ENOMEM;
 	}
 
 	us->extra = data;
 	us->extra_destructor = rio_karma_destructor;
-	ret = rio_karma_send_command(RIO_ENTER_STORAGE, us);
-	data->in_storage = (ret == 0);
-out:
-	return ret;
+	if (rio_karma_send_command(RIO_ENTER_STORAGE, us))
+		return -EIO;
+
+	data->in_storage = 1;
+
+	return 0;
 }
 
 static struct scsi_host_template karma_host_template;
diff --git a/drivers/usb/storage/onetouch.c b/drivers/usb/storage/onetouch.c
index a989fe930e21..1db2eefeea22 100644
--- a/drivers/usb/storage/onetouch.c
+++ b/drivers/usb/storage/onetouch.c
@@ -180,7 +180,7 @@ static int onetouch_connect_input(struct us_data *ss)
 		return -ENODEV;
 
 	pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
-	maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
+	maxp = usb_maxpacket(udev, pipe);
 	maxp = min(maxp, ONETOUCH_PKT_LEN);
 
 	onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL);
diff --git a/drivers/usb/storage/shuttle_usbat.c b/drivers/usb/storage/shuttle_usbat.c
index 54aa1392c9ca..f0d0ca37163d 100644
--- a/drivers/usb/storage/shuttle_usbat.c
+++ b/drivers/usb/storage/shuttle_usbat.c
@@ -1456,7 +1456,7 @@ static int init_usbat(struct us_data *us, int devicetype)
 
 	us->extra = kzalloc(sizeof(struct usbat_info), GFP_NOIO);
 	if (!us->extra)
-		return 1;
+		return -ENOMEM;
 
 	info = (struct usbat_info *) (us->extra);
 
@@ -1465,7 +1465,7 @@ static int init_usbat(struct us_data *us, int devicetype)
 				 USBAT_UIO_OE1 | USBAT_UIO_OE0,
 				 USBAT_UIO_EPAD | USBAT_UIO_1);
 	if (rc != USB_STOR_XFER_GOOD)
-		return USB_STOR_TRANSPORT_ERROR;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 1\n");
 
@@ -1473,42 +1473,42 @@ static int init_usbat(struct us_data *us, int devicetype)
 
 	rc = usbat_read_user_io(us, status);
 	if (rc != USB_STOR_TRANSPORT_GOOD)
-		return rc;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 2\n");
 
 	rc = usbat_read_user_io(us, status);
 	if (rc != USB_STOR_XFER_GOOD)
-		return USB_STOR_TRANSPORT_ERROR;
+		return -EIO;
 
 	rc = usbat_read_user_io(us, status);
 	if (rc != USB_STOR_XFER_GOOD)
-		return USB_STOR_TRANSPORT_ERROR;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 3\n");
 
 	rc = usbat_select_and_test_registers(us);
 	if (rc != USB_STOR_TRANSPORT_GOOD)
-		return rc;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 4\n");
 
 	rc = usbat_read_user_io(us, status);
 	if (rc != USB_STOR_XFER_GOOD)
-		return USB_STOR_TRANSPORT_ERROR;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 5\n");
 
 	/* Enable peripheral control signals and card detect */
 	rc = usbat_device_enable_cdt(us);
 	if (rc != USB_STOR_TRANSPORT_GOOD)
-		return rc;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 6\n");
 
 	rc = usbat_read_user_io(us, status);
 	if (rc != USB_STOR_XFER_GOOD)
-		return USB_STOR_TRANSPORT_ERROR;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 7\n");
 
@@ -1516,19 +1516,19 @@ static int init_usbat(struct us_data *us, int devicetype)
 
 	rc = usbat_read_user_io(us, status);
 	if (rc != USB_STOR_XFER_GOOD)
-		return USB_STOR_TRANSPORT_ERROR;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 8\n");
 
 	rc = usbat_select_and_test_registers(us);
 	if (rc != USB_STOR_TRANSPORT_GOOD)
-		return rc;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 9\n");
 
 	/* At this point, we need to detect which device we are using */
 	if (usbat_set_transport(us, info, devicetype))
-		return USB_STOR_TRANSPORT_ERROR;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 10\n");
 
@@ -1539,11 +1539,11 @@ static int init_usbat(struct us_data *us, int devicetype)
 	rc = usbat_set_shuttle_features(us, (USBAT_FEAT_ETEN | USBAT_FEAT_ET2 | USBAT_FEAT_ET1),
 									0x00, 0x88, 0x08, subcountH, subcountL);
 	if (rc != USB_STOR_XFER_GOOD)
-		return USB_STOR_TRANSPORT_ERROR;
+		return -EIO;
 
 	usb_stor_dbg(us, "INIT 11\n");
 
-	return USB_STOR_TRANSPORT_GOOD;
+	return 0;
 }
 
 /*
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c
index 1928b3918242..64d96d210e02 100644
--- a/drivers/usb/storage/transport.c
+++ b/drivers/usb/storage/transport.c
@@ -363,7 +363,7 @@ static int usb_stor_intr_transfer(struct us_data *us, void *buf,
 	usb_stor_dbg(us, "xfer %u bytes\n", length);
 
 	/* calculate the max packet size */
-	maxp = usb_maxpacket(us->pusb_dev, pipe, usb_pipeout(pipe));
+	maxp = usb_maxpacket(us->pusb_dev, pipe);
 	if (maxp > length)
 		maxp = length;
 
diff --git a/drivers/usb/typec/bus.c b/drivers/usb/typec/bus.c
index 78e0e78954f2..26ea2fdec17d 100644
--- a/drivers/usb/typec/bus.c
+++ b/drivers/usb/typec/bus.c
@@ -24,7 +24,7 @@ typec_altmode_set_mux(struct altmode *alt, unsigned long conf, void *data)
 	state.mode = conf;
 	state.data = data;
 
-	return alt->mux->set(alt->mux, &state);
+	return typec_mux_set(alt->mux, &state);
 }
 
 static int typec_altmode_set_state(struct typec_altmode *adev,
diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c
index c8340de0ed49..fd55c2c516a5 100644
--- a/drivers/usb/typec/mux.c
+++ b/drivers/usb/typec/mux.c
@@ -17,9 +17,16 @@
 #include "class.h"
 #include "mux.h"
 
+#define TYPEC_MUX_MAX_DEVS	3
+
+struct typec_switch {
+	struct typec_switch_dev *sw_devs[TYPEC_MUX_MAX_DEVS];
+	unsigned int num_sw_devs;
+};
+
 static int switch_fwnode_match(struct device *dev, const void *fwnode)
 {
-	if (!is_typec_switch(dev))
+	if (!is_typec_switch_dev(dev))
 		return 0;
 
 	return dev_fwnode(dev) == fwnode;
@@ -49,7 +56,7 @@ static void *typec_switch_match(struct fwnode_handle *fwnode, const char *id,
 	dev = class_find_device(&typec_mux_class, NULL, fwnode,
 				switch_fwnode_match);
 
-	return dev ? to_typec_switch(dev) : ERR_PTR(-EPROBE_DEFER);
+	return dev ? to_typec_switch_dev(dev) : ERR_PTR(-EPROBE_DEFER);
 }
 
 /**
@@ -63,14 +70,50 @@ static void *typec_switch_match(struct fwnode_handle *fwnode, const char *id,
  */
 struct typec_switch *fwnode_typec_switch_get(struct fwnode_handle *fwnode)
 {
+	struct typec_switch_dev *sw_devs[TYPEC_MUX_MAX_DEVS];
 	struct typec_switch *sw;
+	int count;
+	int err;
+	int i;
+
+	sw = kzalloc(sizeof(*sw), GFP_KERNEL);
+	if (!sw)
+		return ERR_PTR(-ENOMEM);
+
+	count = fwnode_connection_find_matches(fwnode, "orientation-switch", NULL,
+					       typec_switch_match,
+					       (void **)sw_devs,
+					       ARRAY_SIZE(sw_devs));
+	if (count <= 0) {
+		kfree(sw);
+		return NULL;
+	}
 
-	sw = fwnode_connection_find_match(fwnode, "orientation-switch", NULL,
-					  typec_switch_match);
-	if (!IS_ERR_OR_NULL(sw))
-		WARN_ON(!try_module_get(sw->dev.parent->driver->owner));
+	for (i = 0; i < count; i++) {
+		if (IS_ERR(sw_devs[i])) {
+			err = PTR_ERR(sw_devs[i]);
+			goto put_sw_devs;
+		}
+	}
+
+	for (i = 0; i < count; i++) {
+		WARN_ON(!try_module_get(sw_devs[i]->dev.parent->driver->owner));
+		sw->sw_devs[i] = sw_devs[i];
+	}
+
+	sw->num_sw_devs = count;
 
 	return sw;
+
+put_sw_devs:
+	for (i = 0; i < count; i++) {
+		if (!IS_ERR(sw_devs[i]))
+			put_device(&sw_devs[i]->dev);
+	}
+
+	kfree(sw);
+
+	return ERR_PTR(err);
 }
 EXPORT_SYMBOL_GPL(fwnode_typec_switch_get);
 
@@ -82,16 +125,25 @@ EXPORT_SYMBOL_GPL(fwnode_typec_switch_get);
  */
 void typec_switch_put(struct typec_switch *sw)
 {
-	if (!IS_ERR_OR_NULL(sw)) {
-		module_put(sw->dev.parent->driver->owner);
-		put_device(&sw->dev);
+	struct typec_switch_dev *sw_dev;
+	unsigned int i;
+
+	if (IS_ERR_OR_NULL(sw))
+		return;
+
+	for (i = 0; i < sw->num_sw_devs; i++) {
+		sw_dev = sw->sw_devs[i];
+
+		module_put(sw_dev->dev.parent->driver->owner);
+		put_device(&sw_dev->dev);
 	}
+	kfree(sw);
 }
 EXPORT_SYMBOL_GPL(typec_switch_put);
 
 static void typec_switch_release(struct device *dev)
 {
-	kfree(to_typec_switch(dev));
+	kfree(to_typec_switch_dev(dev));
 }
 
 const struct device_type typec_switch_dev_type = {
@@ -109,82 +161,102 @@ const struct device_type typec_switch_dev_type = {
  * connector to the USB controllers. USB Type-C plugs can be inserted
  * right-side-up or upside-down.
  */
-struct typec_switch *
+struct typec_switch_dev *
 typec_switch_register(struct device *parent,
 		      const struct typec_switch_desc *desc)
 {
-	struct typec_switch *sw;
+	struct typec_switch_dev *sw_dev;
 	int ret;
 
 	if (!desc || !desc->set)
 		return ERR_PTR(-EINVAL);
 
-	sw = kzalloc(sizeof(*sw), GFP_KERNEL);
-	if (!sw)
+	sw_dev = kzalloc(sizeof(*sw_dev), GFP_KERNEL);
+	if (!sw_dev)
 		return ERR_PTR(-ENOMEM);
 
-	sw->set = desc->set;
+	sw_dev->set = desc->set;
 
-	device_initialize(&sw->dev);
-	sw->dev.parent = parent;
-	sw->dev.fwnode = desc->fwnode;
-	sw->dev.class = &typec_mux_class;
-	sw->dev.type = &typec_switch_dev_type;
-	sw->dev.driver_data = desc->drvdata;
-	dev_set_name(&sw->dev, "%s-switch",
-		     desc->name ? desc->name : dev_name(parent));
+	device_initialize(&sw_dev->dev);
+	sw_dev->dev.parent = parent;
+	sw_dev->dev.fwnode = desc->fwnode;
+	sw_dev->dev.class = &typec_mux_class;
+	sw_dev->dev.type = &typec_switch_dev_type;
+	sw_dev->dev.driver_data = desc->drvdata;
+	ret = dev_set_name(&sw_dev->dev, "%s-switch", desc->name ? desc->name : dev_name(parent));
+	if (ret) {
+		put_device(&sw_dev->dev);
+		return ERR_PTR(ret);
+	}
 
-	ret = device_add(&sw->dev);
+	ret = device_add(&sw_dev->dev);
 	if (ret) {
 		dev_err(parent, "failed to register switch (%d)\n", ret);
-		put_device(&sw->dev);
+		put_device(&sw_dev->dev);
 		return ERR_PTR(ret);
 	}
 
-	return sw;
+	return sw_dev;
 }
 EXPORT_SYMBOL_GPL(typec_switch_register);
 
 int typec_switch_set(struct typec_switch *sw,
 		     enum typec_orientation orientation)
 {
+	struct typec_switch_dev *sw_dev;
+	unsigned int i;
+	int ret;
+
 	if (IS_ERR_OR_NULL(sw))
 		return 0;
 
-	return sw->set(sw, orientation);
+	for (i = 0; i < sw->num_sw_devs; i++) {
+		sw_dev = sw->sw_devs[i];
+
+		ret = sw_dev->set(sw_dev, orientation);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
 }
 EXPORT_SYMBOL_GPL(typec_switch_set);
 
 /**
  * typec_switch_unregister - Unregister USB Type-C orientation switch
- * @sw: USB Type-C orientation switch
+ * @sw_dev: USB Type-C orientation switch
  *
  * Unregister switch that was registered with typec_switch_register().
  */
-void typec_switch_unregister(struct typec_switch *sw)
+void typec_switch_unregister(struct typec_switch_dev *sw_dev)
 {
-	if (!IS_ERR_OR_NULL(sw))
-		device_unregister(&sw->dev);
+	if (!IS_ERR_OR_NULL(sw_dev))
+		device_unregister(&sw_dev->dev);
 }
 EXPORT_SYMBOL_GPL(typec_switch_unregister);
 
-void typec_switch_set_drvdata(struct typec_switch *sw, void *data)
+void typec_switch_set_drvdata(struct typec_switch_dev *sw_dev, void *data)
 {
-	dev_set_drvdata(&sw->dev, data);
+	dev_set_drvdata(&sw_dev->dev, data);
 }
 EXPORT_SYMBOL_GPL(typec_switch_set_drvdata);
 
-void *typec_switch_get_drvdata(struct typec_switch *sw)
+void *typec_switch_get_drvdata(struct typec_switch_dev *sw_dev)
 {
-	return dev_get_drvdata(&sw->dev);
+	return dev_get_drvdata(&sw_dev->dev);
 }
 EXPORT_SYMBOL_GPL(typec_switch_get_drvdata);
 
 /* ------------------------------------------------------------------------- */
 
+struct typec_mux {
+	struct typec_mux_dev *mux_devs[TYPEC_MUX_MAX_DEVS];
+	unsigned int num_mux_devs;
+};
+
 static int mux_fwnode_match(struct device *dev, const void *fwnode)
 {
-	if (!is_typec_mux(dev))
+	if (!is_typec_mux_dev(dev))
 		return 0;
 
 	return dev_fwnode(dev) == fwnode;
@@ -246,7 +318,7 @@ find_mux:
 	dev = class_find_device(&typec_mux_class, NULL, fwnode,
 				mux_fwnode_match);
 
-	return dev ? to_typec_mux(dev) : ERR_PTR(-EPROBE_DEFER);
+	return dev ? to_typec_mux_dev(dev) : ERR_PTR(-EPROBE_DEFER);
 }
 
 /**
@@ -262,14 +334,50 @@ find_mux:
 struct typec_mux *fwnode_typec_mux_get(struct fwnode_handle *fwnode,
 				       const struct typec_altmode_desc *desc)
 {
+	struct typec_mux_dev *mux_devs[TYPEC_MUX_MAX_DEVS];
 	struct typec_mux *mux;
+	int count;
+	int err;
+	int i;
+
+	mux = kzalloc(sizeof(*mux), GFP_KERNEL);
+	if (!mux)
+		return ERR_PTR(-ENOMEM);
+
+	count = fwnode_connection_find_matches(fwnode, "mode-switch",
+					       (void *)desc, typec_mux_match,
+					       (void **)mux_devs,
+					       ARRAY_SIZE(mux_devs));
+	if (count <= 0) {
+		kfree(mux);
+		return NULL;
+	}
 
-	mux = fwnode_connection_find_match(fwnode, "mode-switch", (void *)desc,
-					   typec_mux_match);
-	if (!IS_ERR_OR_NULL(mux))
-		WARN_ON(!try_module_get(mux->dev.parent->driver->owner));
+	for (i = 0; i < count; i++) {
+		if (IS_ERR(mux_devs[i])) {
+			err = PTR_ERR(mux_devs[i]);
+			goto put_mux_devs;
+		}
+	}
+
+	for (i = 0; i < count; i++) {
+		WARN_ON(!try_module_get(mux_devs[i]->dev.parent->driver->owner));
+		mux->mux_devs[i] = mux_devs[i];
+	}
+
+	mux->num_mux_devs = count;
 
 	return mux;
+
+put_mux_devs:
+	for (i = 0; i < count; i++) {
+		if (!IS_ERR(mux_devs[i]))
+			put_device(&mux_devs[i]->dev);
+	}
+
+	kfree(mux);
+
+	return ERR_PTR(err);
 }
 EXPORT_SYMBOL_GPL(fwnode_typec_mux_get);
 
@@ -281,25 +389,45 @@ EXPORT_SYMBOL_GPL(fwnode_typec_mux_get);
  */
 void typec_mux_put(struct typec_mux *mux)
 {
-	if (!IS_ERR_OR_NULL(mux)) {
-		module_put(mux->dev.parent->driver->owner);
-		put_device(&mux->dev);
+	struct typec_mux_dev *mux_dev;
+	unsigned int i;
+
+	if (IS_ERR_OR_NULL(mux))
+		return;
+
+	for (i = 0; i < mux->num_mux_devs; i++) {
+		mux_dev = mux->mux_devs[i];
+		module_put(mux_dev->dev.parent->driver->owner);
+		put_device(&mux_dev->dev);
 	}
+	kfree(mux);
 }
 EXPORT_SYMBOL_GPL(typec_mux_put);
 
 int typec_mux_set(struct typec_mux *mux, struct typec_mux_state *state)
 {
+	struct typec_mux_dev *mux_dev;
+	unsigned int i;
+	int ret;
+
 	if (IS_ERR_OR_NULL(mux))
 		return 0;
 
-	return mux->set(mux, state);
+	for (i = 0; i < mux->num_mux_devs; i++) {
+		mux_dev = mux->mux_devs[i];
+
+		ret = mux_dev->set(mux_dev, state);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
 }
 EXPORT_SYMBOL_GPL(typec_mux_set);
 
 static void typec_mux_release(struct device *dev)
 {
-	kfree(to_typec_mux(dev));
+	kfree(to_typec_mux_dev(dev));
 }
 
 const struct device_type typec_mux_dev_type = {
@@ -317,63 +445,66 @@ const struct device_type typec_mux_dev_type = {
  * the pins on the connector need to be reconfigured. This function registers
  * multiplexer switches routing the pins on the connector.
  */
-struct typec_mux *
+struct typec_mux_dev *
 typec_mux_register(struct device *parent, const struct typec_mux_desc *desc)
 {
-	struct typec_mux *mux;
+	struct typec_mux_dev *mux_dev;
 	int ret;
 
 	if (!desc || !desc->set)
 		return ERR_PTR(-EINVAL);
 
-	mux = kzalloc(sizeof(*mux), GFP_KERNEL);
-	if (!mux)
+	mux_dev = kzalloc(sizeof(*mux_dev), GFP_KERNEL);
+	if (!mux_dev)
 		return ERR_PTR(-ENOMEM);
 
-	mux->set = desc->set;
+	mux_dev->set = desc->set;
 
-	device_initialize(&mux->dev);
-	mux->dev.parent = parent;
-	mux->dev.fwnode = desc->fwnode;
-	mux->dev.class = &typec_mux_class;
-	mux->dev.type = &typec_mux_dev_type;
-	mux->dev.driver_data = desc->drvdata;
-	dev_set_name(&mux->dev, "%s-mux",
-		     desc->name ? desc->name : dev_name(parent));
+	device_initialize(&mux_dev->dev);
+	mux_dev->dev.parent = parent;
+	mux_dev->dev.fwnode = desc->fwnode;
+	mux_dev->dev.class = &typec_mux_class;
+	mux_dev->dev.type = &typec_mux_dev_type;
+	mux_dev->dev.driver_data = desc->drvdata;
+	ret = dev_set_name(&mux_dev->dev, "%s-mux", desc->name ? desc->name : dev_name(parent));
+	if (ret) {
+		put_device(&mux_dev->dev);
+		return ERR_PTR(ret);
+	}
 
-	ret = device_add(&mux->dev);
+	ret = device_add(&mux_dev->dev);
 	if (ret) {
 		dev_err(parent, "failed to register mux (%d)\n", ret);
-		put_device(&mux->dev);
+		put_device(&mux_dev->dev);
 		return ERR_PTR(ret);
 	}
 
-	return mux;
+	return mux_dev;
 }
 EXPORT_SYMBOL_GPL(typec_mux_register);
 
 /**
  * typec_mux_unregister - Unregister Multiplexer Switch
- * @mux: USB Type-C Connector Multiplexer/DeMultiplexer
+ * @mux_dev: USB Type-C Connector Multiplexer/DeMultiplexer
  *
  * Unregister mux that was registered with typec_mux_register().
  */
-void typec_mux_unregister(struct typec_mux *mux)
+void typec_mux_unregister(struct typec_mux_dev *mux_dev)
 {
-	if (!IS_ERR_OR_NULL(mux))
-		device_unregister(&mux->dev);
+	if (!IS_ERR_OR_NULL(mux_dev))
+		device_unregister(&mux_dev->dev);
 }
 EXPORT_SYMBOL_GPL(typec_mux_unregister);
 
-void typec_mux_set_drvdata(struct typec_mux *mux, void *data)
+void typec_mux_set_drvdata(struct typec_mux_dev *mux_dev, void *data)
 {
-	dev_set_drvdata(&mux->dev, data);
+	dev_set_drvdata(&mux_dev->dev, data);
 }
 EXPORT_SYMBOL_GPL(typec_mux_set_drvdata);
 
-void *typec_mux_get_drvdata(struct typec_mux *mux)
+void *typec_mux_get_drvdata(struct typec_mux_dev *mux_dev)
 {
-	return dev_get_drvdata(&mux->dev);
+	return dev_get_drvdata(&mux_dev->dev);
 }
 EXPORT_SYMBOL_GPL(typec_mux_get_drvdata);
 
diff --git a/drivers/usb/typec/mux.h b/drivers/usb/typec/mux.h
index b1d6e837cb74..58f0f28b6dc8 100644
--- a/drivers/usb/typec/mux.h
+++ b/drivers/usb/typec/mux.h
@@ -5,23 +5,23 @@
 
 #include <linux/usb/typec_mux.h>
 
-struct typec_switch {
+struct typec_switch_dev {
 	struct device dev;
 	typec_switch_set_fn_t set;
 };
 
-struct typec_mux {
+struct typec_mux_dev {
 	struct device dev;
 	typec_mux_set_fn_t set;
 };
 
-#define to_typec_switch(_dev_) container_of(_dev_, struct typec_switch, dev)
-#define to_typec_mux(_dev_) container_of(_dev_, struct typec_mux, dev)
+#define to_typec_switch_dev(_dev_) container_of(_dev_, struct typec_switch_dev, dev)
+#define to_typec_mux_dev(_dev_) container_of(_dev_, struct typec_mux_dev, dev)
 
 extern const struct device_type typec_switch_dev_type;
 extern const struct device_type typec_mux_dev_type;
 
-#define is_typec_switch(dev) ((dev)->type == &typec_switch_dev_type)
-#define is_typec_mux(dev) ((dev)->type == &typec_mux_dev_type)
+#define is_typec_switch_dev(dev) ((dev)->type == &typec_switch_dev_type)
+#define is_typec_mux_dev(dev) ((dev)->type == &typec_mux_dev_type)
 
 #endif /* __USB_TYPEC_MUX__ */
diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig
index edead555835e..5eb2c17d72c1 100644
--- a/drivers/usb/typec/mux/Kconfig
+++ b/drivers/usb/typec/mux/Kconfig
@@ -2,6 +2,16 @@
 
 menu "USB Type-C Multiplexer/DeMultiplexer Switch support"
 
+config TYPEC_MUX_FSA4480
+	tristate "ON Semi FSA4480 Analog Audio Switch driver"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Driver for the ON Semiconductor FSA4480 Analog Audio Switch, which
+	  provides support for muxing analog audio and sideband signals on a
+	  common USB Type-C connector.
+	  If compiled as a module, the module will be named fsa4480.
+
 config TYPEC_MUX_PI3USB30532
 	tristate "Pericom PI3USB30532 Type-C cross switch driver"
 	depends on I2C
diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile
index 280a6f553115..e52a56c16bfb 100644
--- a/drivers/usb/typec/mux/Makefile
+++ b/drivers/usb/typec/mux/Makefile
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 
+obj-$(CONFIG_TYPEC_MUX_FSA4480)		+= fsa4480.o
 obj-$(CONFIG_TYPEC_MUX_PI3USB30532)	+= pi3usb30532.o
 obj-$(CONFIG_TYPEC_MUX_INTEL_PMC)	+= intel_pmc_mux.o
diff --git a/drivers/usb/typec/mux/fsa4480.c b/drivers/usb/typec/mux/fsa4480.c
new file mode 100644
index 000000000000..6184f5367190
--- /dev/null
+++ b/drivers/usb/typec/mux/fsa4480.c
@@ -0,0 +1,218 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021-2022 Linaro Ltd.
+ * Copyright (C) 2018-2020 The Linux Foundation
+ */
+
+#include <linux/bits.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/usb/typec_dp.h>
+#include <linux/usb/typec_mux.h>
+
+#define FSA4480_SWITCH_ENABLE	0x04
+#define FSA4480_SWITCH_SELECT	0x05
+#define FSA4480_SWITCH_STATUS1	0x07
+#define FSA4480_SLOW_L		0x08
+#define FSA4480_SLOW_R		0x09
+#define FSA4480_SLOW_MIC	0x0a
+#define FSA4480_SLOW_SENSE	0x0b
+#define FSA4480_SLOW_GND	0x0c
+#define FSA4480_DELAY_L_R	0x0d
+#define FSA4480_DELAY_L_MIC	0x0e
+#define FSA4480_DELAY_L_SENSE	0x0f
+#define FSA4480_DELAY_L_AGND	0x10
+#define FSA4480_RESET		0x1e
+#define FSA4480_MAX_REGISTER	0x1f
+
+#define FSA4480_ENABLE_DEVICE	BIT(7)
+#define FSA4480_ENABLE_SBU	GENMASK(6, 5)
+#define FSA4480_ENABLE_USB	GENMASK(4, 3)
+
+#define FSA4480_SEL_SBU_REVERSE	GENMASK(6, 5)
+#define FSA4480_SEL_USB		GENMASK(4, 3)
+
+struct fsa4480 {
+	struct i2c_client *client;
+
+	/* used to serialize concurrent change requests */
+	struct mutex lock;
+
+	struct typec_switch_dev *sw;
+	struct typec_mux_dev *mux;
+
+	struct regmap *regmap;
+
+	u8 cur_enable;
+	u8 cur_select;
+};
+
+static const struct regmap_config fsa4480_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = FSA4480_MAX_REGISTER,
+	/* Accesses only done under fsa4480->lock */
+	.disable_locking = true,
+};
+
+static int fsa4480_switch_set(struct typec_switch_dev *sw,
+			      enum typec_orientation orientation)
+{
+	struct fsa4480 *fsa = typec_switch_get_drvdata(sw);
+	u8 new_sel;
+
+	mutex_lock(&fsa->lock);
+	new_sel = FSA4480_SEL_USB;
+	if (orientation == TYPEC_ORIENTATION_REVERSE)
+		new_sel |= FSA4480_SEL_SBU_REVERSE;
+
+	if (new_sel == fsa->cur_select)
+		goto out_unlock;
+
+	if (fsa->cur_enable & FSA4480_ENABLE_SBU) {
+		/* Disable SBU output while re-configuring the switch */
+		regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE,
+			     fsa->cur_enable & ~FSA4480_ENABLE_SBU);
+
+		/* 35us to allow the SBU switch to turn off */
+		usleep_range(35, 1000);
+	}
+
+	regmap_write(fsa->regmap, FSA4480_SWITCH_SELECT, new_sel);
+	fsa->cur_select = new_sel;
+
+	if (fsa->cur_enable & FSA4480_ENABLE_SBU) {
+		regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, fsa->cur_enable);
+
+		/* 15us to allow the SBU switch to turn on again */
+		usleep_range(15, 1000);
+	}
+
+out_unlock:
+	mutex_unlock(&fsa->lock);
+
+	return 0;
+}
+
+static int fsa4480_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state)
+{
+	struct fsa4480 *fsa = typec_mux_get_drvdata(mux);
+	u8 new_enable;
+
+	mutex_lock(&fsa->lock);
+
+	new_enable = FSA4480_ENABLE_DEVICE | FSA4480_ENABLE_USB;
+	if (state->mode >= TYPEC_DP_STATE_A)
+		new_enable |= FSA4480_ENABLE_SBU;
+
+	if (new_enable == fsa->cur_enable)
+		goto out_unlock;
+
+	regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, new_enable);
+	fsa->cur_enable = new_enable;
+
+	if (new_enable & FSA4480_ENABLE_SBU) {
+		/* 15us to allow the SBU switch to turn off */
+		usleep_range(15, 1000);
+	}
+
+out_unlock:
+	mutex_unlock(&fsa->lock);
+
+	return 0;
+}
+
+static int fsa4480_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct typec_switch_desc sw_desc = { };
+	struct typec_mux_desc mux_desc = { };
+	struct fsa4480 *fsa;
+
+	fsa = devm_kzalloc(dev, sizeof(*fsa), GFP_KERNEL);
+	if (!fsa)
+		return -ENOMEM;
+
+	fsa->client = client;
+	mutex_init(&fsa->lock);
+
+	fsa->regmap = devm_regmap_init_i2c(client, &fsa4480_regmap_config);
+	if (IS_ERR(fsa->regmap))
+		return dev_err_probe(dev, PTR_ERR(fsa->regmap), "failed to initialize regmap\n");
+
+	fsa->cur_enable = FSA4480_ENABLE_DEVICE | FSA4480_ENABLE_USB;
+	fsa->cur_select = FSA4480_SEL_USB;
+
+	/* set default settings */
+	regmap_write(fsa->regmap, FSA4480_SLOW_L, 0x00);
+	regmap_write(fsa->regmap, FSA4480_SLOW_R, 0x00);
+	regmap_write(fsa->regmap, FSA4480_SLOW_MIC, 0x00);
+	regmap_write(fsa->regmap, FSA4480_SLOW_SENSE, 0x00);
+	regmap_write(fsa->regmap, FSA4480_SLOW_GND, 0x00);
+	regmap_write(fsa->regmap, FSA4480_DELAY_L_R, 0x00);
+	regmap_write(fsa->regmap, FSA4480_DELAY_L_MIC, 0x00);
+	regmap_write(fsa->regmap, FSA4480_DELAY_L_SENSE, 0x00);
+	regmap_write(fsa->regmap, FSA4480_DELAY_L_AGND, 0x09);
+	regmap_write(fsa->regmap, FSA4480_SWITCH_SELECT, fsa->cur_select);
+	regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, fsa->cur_enable);
+
+	sw_desc.drvdata = fsa;
+	sw_desc.fwnode = dev_fwnode(dev);
+	sw_desc.set = fsa4480_switch_set;
+
+	fsa->sw = typec_switch_register(dev, &sw_desc);
+	if (IS_ERR(fsa->sw))
+		return dev_err_probe(dev, PTR_ERR(fsa->sw), "failed to register typec switch\n");
+
+	mux_desc.drvdata = fsa;
+	mux_desc.fwnode = dev_fwnode(dev);
+	mux_desc.set = fsa4480_mux_set;
+
+	fsa->mux = typec_mux_register(dev, &mux_desc);
+	if (IS_ERR(fsa->mux)) {
+		typec_switch_unregister(fsa->sw);
+		return dev_err_probe(dev, PTR_ERR(fsa->mux), "failed to register typec mux\n");
+	}
+
+	i2c_set_clientdata(client, fsa);
+	return 0;
+}
+
+static int fsa4480_remove(struct i2c_client *client)
+{
+	struct fsa4480 *fsa = i2c_get_clientdata(client);
+
+	typec_mux_unregister(fsa->mux);
+	typec_switch_unregister(fsa->sw);
+
+	return 0;
+}
+
+static const struct i2c_device_id fsa4480_table[] = {
+	{ "fsa4480" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, fsa4480_table);
+
+static const struct of_device_id fsa4480_of_table[] = {
+	{ .compatible = "fcs,fsa4480" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, fsa4480_of_table);
+
+static struct i2c_driver fsa4480_driver = {
+	.driver = {
+		.name = "fsa4480",
+		.of_match_table = fsa4480_of_table,
+	},
+	.probe_new	= fsa4480_probe,
+	.remove		= fsa4480_remove,
+	.id_table	= fsa4480_table,
+};
+module_i2c_driver(fsa4480_driver);
+
+MODULE_DESCRIPTION("ON Semiconductor FSA4480 driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
index 2cdd22130834..47b733f78fb0 100644
--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -121,8 +121,8 @@ struct pmc_usb_port {
 	int num;
 	u32 iom_status;
 	struct pmc_usb *pmc;
-	struct typec_mux *typec_mux;
-	struct typec_switch *typec_sw;
+	struct typec_mux_dev *typec_mux;
+	struct typec_switch_dev *typec_sw;
 	struct usb_role_switch *usb_sw;
 
 	enum typec_orientation orientation;
@@ -173,7 +173,7 @@ static int hsl_orientation(struct pmc_usb_port *port)
 	return port->orientation - 1;
 }
 
-static int pmc_usb_command(struct pmc_usb_port *port, u8 *msg, u32 len)
+static int pmc_usb_send_command(struct intel_scu_ipc_dev *ipc, u8 *msg, u32 len)
 {
 	u8 response[4];
 	u8 status_res;
@@ -184,7 +184,7 @@ static int pmc_usb_command(struct pmc_usb_port *port, u8 *msg, u32 len)
 	 * Status can be checked from the response message if the
 	 * function intel_scu_ipc_dev_command succeeds.
 	 */
-	ret = intel_scu_ipc_dev_command(port->pmc->ipc, PMC_USBC_CMD, 0, msg,
+	ret = intel_scu_ipc_dev_command(ipc, PMC_USBC_CMD, 0, msg,
 					len, response, sizeof(response));
 
 	if (ret)
@@ -203,6 +203,23 @@ static int pmc_usb_command(struct pmc_usb_port *port, u8 *msg, u32 len)
 	return 0;
 }
 
+static int pmc_usb_command(struct pmc_usb_port *port, u8 *msg, u32 len)
+{
+	int retry_count = 3;
+	int ret;
+
+	/*
+	 * If PMC is busy then retry the command once again
+	 */
+	while (retry_count--) {
+		ret = pmc_usb_send_command(port->pmc->ipc, msg, len);
+		if (ret != -EBUSY)
+			break;
+	}
+
+	return ret;
+}
+
 static int
 pmc_usb_mux_dp_hpd(struct pmc_usb_port *port, struct typec_displayport_data *dp)
 {
@@ -416,7 +433,7 @@ static int pmc_usb_connect(struct pmc_usb_port *port, enum usb_role role)
 }
 
 static int
-pmc_usb_mux_set(struct typec_mux *mux, struct typec_mux_state *state)
+pmc_usb_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state)
 {
 	struct pmc_usb_port *port = typec_mux_get_drvdata(mux);
 
@@ -452,7 +469,7 @@ pmc_usb_mux_set(struct typec_mux *mux, struct typec_mux_state *state)
 	return -EOPNOTSUPP;
 }
 
-static int pmc_usb_set_orientation(struct typec_switch *sw,
+static int pmc_usb_set_orientation(struct typec_switch_dev *sw,
 				   enum typec_orientation orientation)
 {
 	struct pmc_usb_port *port = typec_switch_get_drvdata(sw);
diff --git a/drivers/usb/typec/mux/pi3usb30532.c b/drivers/usb/typec/mux/pi3usb30532.c
index 7afe275b17d0..6ce9f282594e 100644
--- a/drivers/usb/typec/mux/pi3usb30532.c
+++ b/drivers/usb/typec/mux/pi3usb30532.c
@@ -23,8 +23,8 @@
 struct pi3usb30532 {
 	struct i2c_client *client;
 	struct mutex lock; /* protects the cached conf register */
-	struct typec_switch *sw;
-	struct typec_mux *mux;
+	struct typec_switch_dev *sw;
+	struct typec_mux_dev *mux;
 	u8 conf;
 };
 
@@ -45,7 +45,7 @@ static int pi3usb30532_set_conf(struct pi3usb30532 *pi, u8 new_conf)
 	return 0;
 }
 
-static int pi3usb30532_sw_set(struct typec_switch *sw,
+static int pi3usb30532_sw_set(struct typec_switch_dev *sw,
 			      enum typec_orientation orientation)
 {
 	struct pi3usb30532 *pi = typec_switch_get_drvdata(sw);
@@ -74,7 +74,7 @@ static int pi3usb30532_sw_set(struct typec_switch *sw,
 }
 
 static int
-pi3usb30532_mux_set(struct typec_mux *mux, struct typec_mux_state *state)
+pi3usb30532_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state)
 {
 	struct pi3usb30532 *pi = typec_mux_get_drvdata(mux);
 	u8 new_conf;
diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index 16b4560216ba..dfbba5ae9487 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -93,6 +93,8 @@ struct tps6598x {
 	struct power_supply *psy;
 	struct power_supply_desc psy_desc;
 	enum power_supply_usb_type usb_type;
+
+	u16 pwr_status;
 };
 
 static enum power_supply_property tps6598x_psy_props[] = {
@@ -230,17 +232,12 @@ static int tps6598x_connect(struct tps6598x *tps, u32 status)
 {
 	struct typec_partner_desc desc;
 	enum typec_pwr_opmode mode;
-	u16 pwr_status;
 	int ret;
 
 	if (tps->partner)
 		return 0;
 
-	ret = tps6598x_read16(tps, TPS_REG_POWER_STATUS, &pwr_status);
-	if (ret < 0)
-		return ret;
-
-	mode = TPS_POWER_STATUS_PWROPMODE(pwr_status);
+	mode = TPS_POWER_STATUS_PWROPMODE(tps->pwr_status);
 
 	desc.usb_pd = mode == TYPEC_PWR_MODE_PD;
 	desc.accessory = TYPEC_ACCESSORY_NONE; /* XXX: handle accessories */
@@ -455,6 +452,7 @@ static bool tps6598x_read_power_status(struct tps6598x *tps)
 		dev_err(tps->dev, "failed to read power status: %d\n", ret);
 		return false;
 	}
+	tps->pwr_status = pwr_status;
 	trace_tps6598x_power_status(pwr_status);
 
 	return true;
@@ -601,15 +599,8 @@ static const struct regmap_config tps6598x_regmap_config = {
 static int tps6598x_psy_get_online(struct tps6598x *tps,
 				   union power_supply_propval *val)
 {
-	int ret;
-	u16 pwr_status;
-
-	ret = tps6598x_read16(tps, TPS_REG_POWER_STATUS, &pwr_status);
-	if (ret < 0)
-		return ret;
-
-	if (TPS_POWER_STATUS_CONNECTION(pwr_status) &&
-	    TPS_POWER_STATUS_SOURCESINK(pwr_status)) {
+	if (TPS_POWER_STATUS_CONNECTION(tps->pwr_status) &&
+	    TPS_POWER_STATUS_SOURCESINK(tps->pwr_status)) {
 		val->intval = 1;
 	} else {
 		val->intval = 0;
@@ -622,15 +613,11 @@ static int tps6598x_psy_get_prop(struct power_supply *psy,
 				 union power_supply_propval *val)
 {
 	struct tps6598x *tps = power_supply_get_drvdata(psy);
-	u16 pwr_status;
 	int ret = 0;
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_USB_TYPE:
-		ret = tps6598x_read16(tps, TPS_REG_POWER_STATUS, &pwr_status);
-		if (ret < 0)
-			return ret;
-		if (TPS_POWER_STATUS_PWROPMODE(pwr_status) == TYPEC_PWR_MODE_PD)
+		if (TPS_POWER_STATUS_PWROPMODE(tps->pwr_status) == TYPEC_PWR_MODE_PD)
 			val->intval = POWER_SUPPLY_USB_TYPE_PD;
 		else
 			val->intval = POWER_SUPPLY_USB_TYPE_C;
@@ -837,6 +824,11 @@ static int tps6598x_probe(struct i2c_client *client)
 	fwnode_handle_put(fwnode);
 
 	if (status & TPS_STATUS_PLUG_PRESENT) {
+		ret = tps6598x_read16(tps, TPS_REG_POWER_STATUS, &tps->pwr_status);
+		if (ret < 0) {
+			dev_err(tps->dev, "failed to read power status: %d\n", ret);
+			goto err_role_put;
+		}
 		ret = tps6598x_connect(tps, status);
 		if (ret)
 			dev_err(&client->dev, "failed to register partner\n");
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index a6045aef0d04..cbd862f9f2a1 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -1063,6 +1063,14 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 	con->num = index + 1;
 	con->ucsi = ucsi;
 
+	cap->fwnode = ucsi_find_fwnode(con);
+	con->usb_role_sw = fwnode_usb_role_switch_get(cap->fwnode);
+	if (IS_ERR(con->usb_role_sw)) {
+		dev_err(ucsi->dev, "con%d: failed to get usb role switch\n",
+			con->num);
+		return PTR_ERR(con->usb_role_sw);
+	}
+
 	/* Delay other interactions with the con until registration is complete */
 	mutex_lock(&con->lock);
 
@@ -1098,7 +1106,6 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 	if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DEBUG_ACCESSORY)
 		*accessory = TYPEC_ACCESSORY_DEBUG;
 
-	cap->fwnode = ucsi_find_fwnode(con);
 	cap->driver_data = con;
 	cap->ops = &ucsi_ops;
 
@@ -1156,13 +1163,6 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 		ucsi_port_psy_changed(con);
 	}
 
-	con->usb_role_sw = fwnode_usb_role_switch_get(cap->fwnode);
-	if (IS_ERR(con->usb_role_sw)) {
-		dev_err(ucsi->dev, "con%d: failed to get usb role switch\n",
-			con->num);
-		con->usb_role_sw = NULL;
-	}
-
 	/* Only notify USB controller if partner supports USB data */
 	if (!(UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) & UCSI_CONSTAT_PARTNER_FLAG_USB))
 		u_role = USB_ROLE_NONE;
@@ -1196,6 +1196,32 @@ out_unlock:
 	return ret;
 }
 
+static void ucsi_unregister_connectors(struct ucsi *ucsi)
+{
+	struct ucsi_connector *con;
+	int i;
+
+	if (!ucsi->connector)
+		return;
+
+	for (i = 0; i < ucsi->cap.num_connectors; i++) {
+		con = &ucsi->connector[i];
+
+		if (!con->wq)
+			break;
+
+		cancel_work_sync(&con->work);
+		ucsi_unregister_partner(con);
+		ucsi_unregister_altmodes(con, UCSI_RECIPIENT_CON);
+		ucsi_unregister_port_psy(con);
+		destroy_workqueue(con->wq);
+		typec_unregister_port(con->port);
+	}
+
+	kfree(ucsi->connector);
+	ucsi->connector = NULL;
+}
+
 /**
  * ucsi_init - Initialize UCSI interface
  * @ucsi: UCSI to be initialized
@@ -1204,7 +1230,6 @@ out_unlock:
  */
 static int ucsi_init(struct ucsi *ucsi)
 {
-	struct ucsi_connector *con;
 	u64 command;
 	int ret;
 	int i;
@@ -1235,7 +1260,7 @@ static int ucsi_init(struct ucsi *ucsi)
 	}
 
 	/* Allocate the connectors. Released in ucsi_unregister() */
-	ucsi->connector = kcalloc(ucsi->cap.num_connectors + 1,
+	ucsi->connector = kcalloc(ucsi->cap.num_connectors,
 				  sizeof(*ucsi->connector), GFP_KERNEL);
 	if (!ucsi->connector) {
 		ret = -ENOMEM;
@@ -1259,15 +1284,7 @@ static int ucsi_init(struct ucsi *ucsi)
 	return 0;
 
 err_unregister:
-	for (con = ucsi->connector; con->port; con++) {
-		ucsi_unregister_partner(con);
-		ucsi_unregister_altmodes(con, UCSI_RECIPIENT_CON);
-		ucsi_unregister_port_psy(con);
-		if (con->wq)
-			destroy_workqueue(con->wq);
-		typec_unregister_port(con->port);
-		con->port = NULL;
-	}
+	ucsi_unregister_connectors(ucsi);
 
 err_reset:
 	memset(&ucsi->cap, 0, sizeof(ucsi->cap));
@@ -1278,12 +1295,20 @@ err:
 
 static void ucsi_init_work(struct work_struct *work)
 {
-	struct ucsi *ucsi = container_of(work, struct ucsi, work);
+	struct ucsi *ucsi = container_of(work, struct ucsi, work.work);
 	int ret;
 
 	ret = ucsi_init(ucsi);
 	if (ret)
 		dev_err(ucsi->dev, "PPM init failed (%d)\n", ret);
+
+	if (ret == -EPROBE_DEFER) {
+		if (ucsi->work_count++ > UCSI_ROLE_SWITCH_WAIT_COUNT)
+			return;
+
+		queue_delayed_work(system_long_wq, &ucsi->work,
+				   UCSI_ROLE_SWITCH_INTERVAL);
+	}
 }
 
 /**
@@ -1323,7 +1348,7 @@ struct ucsi *ucsi_create(struct device *dev, const struct ucsi_operations *ops)
 	if (!ucsi)
 		return ERR_PTR(-ENOMEM);
 
-	INIT_WORK(&ucsi->work, ucsi_init_work);
+	INIT_DELAYED_WORK(&ucsi->work, ucsi_init_work);
 	mutex_init(&ucsi->ppm_lock);
 	ucsi->dev = dev;
 	ucsi->ops = ops;
@@ -1358,7 +1383,7 @@ int ucsi_register(struct ucsi *ucsi)
 	if (!ucsi->version)
 		return -ENODEV;
 
-	queue_work(system_long_wq, &ucsi->work);
+	queue_delayed_work(system_long_wq, &ucsi->work, 0);
 
 	return 0;
 }
@@ -1373,26 +1398,14 @@ EXPORT_SYMBOL_GPL(ucsi_register);
 void ucsi_unregister(struct ucsi *ucsi)
 {
 	u64 cmd = UCSI_SET_NOTIFICATION_ENABLE;
-	int i;
 
 	/* Make sure that we are not in the middle of driver initialization */
-	cancel_work_sync(&ucsi->work);
+	cancel_delayed_work_sync(&ucsi->work);
 
 	/* Disable notifications */
 	ucsi->ops->async_write(ucsi, UCSI_CONTROL, &cmd, sizeof(cmd));
 
-	for (i = 0; i < ucsi->cap.num_connectors; i++) {
-		cancel_work_sync(&ucsi->connector[i].work);
-		ucsi_unregister_partner(&ucsi->connector[i]);
-		ucsi_unregister_altmodes(&ucsi->connector[i],
-					 UCSI_RECIPIENT_CON);
-		ucsi_unregister_port_psy(&ucsi->connector[i]);
-		if (ucsi->connector[i].wq)
-			destroy_workqueue(ucsi->connector[i].wq);
-		typec_unregister_port(ucsi->connector[i].port);
-	}
-
-	kfree(ucsi->connector);
+	ucsi_unregister_connectors(ucsi);
 }
 EXPORT_SYMBOL_GPL(ucsi_unregister);
 
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index 280f1e1bda2c..8eb391e3e592 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -287,7 +287,11 @@ struct ucsi {
 	struct ucsi_capability cap;
 	struct ucsi_connector *connector;
 
-	struct work_struct work;
+	struct delayed_work work;
+	int work_count;
+#define UCSI_ROLE_SWITCH_RETRY_PER_HZ	10
+#define UCSI_ROLE_SWITCH_INTERVAL	(HZ / UCSI_ROLE_SWITCH_RETRY_PER_HZ)
+#define UCSI_ROLE_SWITCH_WAIT_COUNT	(10 * UCSI_ROLE_SWITCH_RETRY_PER_HZ)
 
 	/* PPM Communication lock */
 	struct mutex ppm_lock;
diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c
index d8d3892e5a69..3c6d452e3bf4 100644
--- a/drivers/usb/usbip/stub_dev.c
+++ b/drivers/usb/usbip/stub_dev.c
@@ -393,7 +393,6 @@ static int stub_probe(struct usb_device *udev)
 
 err_port:
 	dev_set_drvdata(&udev->dev, NULL);
-	usb_put_dev(udev);
 
 	/* we already have busid_priv, just lock busid_lock */
 	spin_lock(&busid_priv->busid_lock);
@@ -408,6 +407,7 @@ call_put_busid_priv:
 	put_busid_priv(busid_priv);
 
 sdev_free:
+	usb_put_dev(udev);
 	stub_device_free(sdev);
 
 	return rc;
diff --git a/drivers/usb/usbip/stub_rx.c b/drivers/usb/usbip/stub_rx.c
index 325c22008e53..5dd41e8215e0 100644
--- a/drivers/usb/usbip/stub_rx.c
+++ b/drivers/usb/usbip/stub_rx.c
@@ -138,7 +138,9 @@ static int tweak_set_configuration_cmd(struct urb *urb)
 	req = (struct usb_ctrlrequest *) urb->setup_packet;
 	config = le16_to_cpu(req->wValue);
 
+	usb_lock_device(sdev->udev);
 	err = usb_set_configuration(sdev->udev, config);
+	usb_unlock_device(sdev->udev);
 	if (err && err != -ENODEV)
 		dev_err(&sdev->udev->dev, "can't set config #%d, error %d\n",
 			config, err);