diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-22 22:15:59 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-22 22:15:59 +0300 |
commit | 8ff546b801e5cca0337c0f0a7234795d0a6309a1 (patch) | |
tree | fbda2c8e8e5aa9b82d389091f7945e28cdb67418 /drivers/usb/common/ulpi.c | |
parent | ca78d3173cff3503bcd15723b049757f75762d15 (diff) | |
parent | 0df8a3dbacb585bb9c8b2e55de43c6aac9d86488 (diff) | |
download | linux-8ff546b801e5cca0337c0f0a7234795d0a6309a1.tar.xz |
Merge tag 'usb-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB/PHY updates from Greg KH:
"Here is the big USB and PHY driver updates for 4.11-rc1.
Nothing major, just the normal amount of churn in the usb gadget and
dwc and xhci controllers, new device ids, new phy drivers, a new
usb-serial driver, and a few other minor changes in different USB
drivers.
All have been in linux-next for a long time with no reported issues"
* tag 'usb-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (265 commits)
usb: cdc-wdm: remove logically dead code
USB: serial: keyspan: drop header file
USB: serial: io_edgeport: drop io-tables header file
usb: musb: add code comment for clarification
usb: misc: add USB251xB/xBi Hi-Speed Hub Controller Driver
usb: misc: usbtest: remove redundant check on retval < 0
USB: serial: upd78f0730: sort device ids
USB: serial: upd78f0730: add ID for EVAL-ADXL362Z
ohci-hub: fix typo in dbg_port macro
usb: musb: dsps: Manage CPPI 4.1 DMA interrupt in DSPS
usb: musb: tusb6010: Clean up tusb_omap_dma structure
usb: musb: cppi_dma: Clean up cppi41_dma_controller structure
usb: musb: cppi_dma: Clean up cppi structure
usb: musb: cppi41: Detect aborted transfers in cppi41_dma_callback()
usb: musb: dma: Add a DMA completion platform callback
drivers: usb: usbip: Add missing break statement to switch
usb: mtu3: remove redundant dev_err call in get_ssusb_rscs()
USB: serial: mos7840: fix another NULL-deref at open
USB: serial: console: clean up sanity checks
USB: serial: console: fix uninitialised spinlock
...
Diffstat (limited to 'drivers/usb/common/ulpi.c')
-rw-r--r-- | drivers/usb/common/ulpi.c | 79 |
1 files changed, 73 insertions, 6 deletions
diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c index 8b317702d761..c9480d77810c 100644 --- a/drivers/usb/common/ulpi.c +++ b/drivers/usb/common/ulpi.c @@ -16,6 +16,9 @@ #include <linux/module.h> #include <linux/slab.h> #include <linux/acpi.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/clk/clk-conf.h> /* -------------------------------------------------------------------------- */ @@ -39,6 +42,10 @@ static int ulpi_match(struct device *dev, struct device_driver *driver) struct ulpi *ulpi = to_ulpi_dev(dev); const struct ulpi_device_id *id; + /* Some ULPI devices don't have a vendor id so rely on OF match */ + if (ulpi->id.vendor == 0) + return of_driver_match_device(dev, driver); + for (id = drv->id_table; id->vendor; id++) if (id->vendor == ulpi->id.vendor && id->product == ulpi->id.product) @@ -50,6 +57,11 @@ static int ulpi_match(struct device *dev, struct device_driver *driver) static int ulpi_uevent(struct device *dev, struct kobj_uevent_env *env) { struct ulpi *ulpi = to_ulpi_dev(dev); + int ret; + + ret = of_device_uevent_modalias(dev, env); + if (ret != -ENODEV) + return ret; if (add_uevent_var(env, "MODALIAS=ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product)) @@ -60,6 +72,11 @@ static int ulpi_uevent(struct device *dev, struct kobj_uevent_env *env) static int ulpi_probe(struct device *dev) { struct ulpi_driver *drv = to_ulpi_driver(dev->driver); + int ret; + + ret = of_clk_set_defaults(dev->of_node, false); + if (ret < 0) + return ret; return drv->probe(to_ulpi_dev(dev)); } @@ -87,8 +104,13 @@ static struct bus_type ulpi_bus = { static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { + int len; struct ulpi *ulpi = to_ulpi_dev(dev); + len = of_device_get_modalias(dev, buf, PAGE_SIZE - 1); + if (len != -ENODEV) + return len; + return sprintf(buf, "ulpi:v%04xp%04x\n", ulpi->id.vendor, ulpi->id.product); } @@ -153,23 +175,45 @@ EXPORT_SYMBOL_GPL(ulpi_unregister_driver); /* -------------------------------------------------------------------------- */ -static int ulpi_register(struct device *dev, struct ulpi *ulpi) +static int ulpi_of_register(struct ulpi *ulpi) { - int ret; + struct device_node *np = NULL, *child; + struct device *parent; + + /* Find a ulpi bus underneath the parent or the grandparent */ + parent = ulpi->dev.parent; + if (parent->of_node) + np = of_find_node_by_name(parent->of_node, "ulpi"); + else if (parent->parent && parent->parent->of_node) + np = of_find_node_by_name(parent->parent->of_node, "ulpi"); + if (!np) + return 0; + + child = of_get_next_available_child(np, NULL); + of_node_put(np); + if (!child) + return -EINVAL; - ulpi->dev.parent = dev; /* needed early for ops */ + ulpi->dev.of_node = child; + + return 0; +} + +static int ulpi_read_id(struct ulpi *ulpi) +{ + int ret; /* Test the interface */ ret = ulpi_write(ulpi, ULPI_SCRATCH, 0xaa); if (ret < 0) - return ret; + goto err; ret = ulpi_read(ulpi, ULPI_SCRATCH); if (ret < 0) return ret; if (ret != 0xaa) - return -ENODEV; + goto err; ulpi->id.vendor = ulpi_read(ulpi, ULPI_VENDOR_ID_LOW); ulpi->id.vendor |= ulpi_read(ulpi, ULPI_VENDOR_ID_HIGH) << 8; @@ -177,13 +221,35 @@ static int ulpi_register(struct device *dev, struct ulpi *ulpi) ulpi->id.product = ulpi_read(ulpi, ULPI_PRODUCT_ID_LOW); ulpi->id.product |= ulpi_read(ulpi, ULPI_PRODUCT_ID_HIGH) << 8; + /* Some ULPI devices don't have a vendor id so rely on OF match */ + if (ulpi->id.vendor == 0) + goto err; + + request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product); + return 0; +err: + of_device_request_module(&ulpi->dev); + return 0; +} + +static int ulpi_register(struct device *dev, struct ulpi *ulpi) +{ + int ret; + + ulpi->dev.parent = dev; /* needed early for ops */ ulpi->dev.bus = &ulpi_bus; ulpi->dev.type = &ulpi_dev_type; dev_set_name(&ulpi->dev, "%s.ulpi", dev_name(dev)); ACPI_COMPANION_SET(&ulpi->dev, ACPI_COMPANION(dev)); - request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product); + ret = ulpi_of_register(ulpi); + if (ret) + return ret; + + ret = ulpi_read_id(ulpi); + if (ret) + return ret; ret = device_register(&ulpi->dev); if (ret) @@ -234,6 +300,7 @@ EXPORT_SYMBOL_GPL(ulpi_register_interface); */ void ulpi_unregister_interface(struct ulpi *ulpi) { + of_node_put(ulpi->dev.of_node); device_unregister(&ulpi->dev); } EXPORT_SYMBOL_GPL(ulpi_unregister_interface); |