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authorArtur Petrosyan <Arthur.Petrosyan@synopsys.com>2021-04-16 15:46:58 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-04-22 12:55:33 +0300
commitb29b494bcc2e612e3abcd1b136db25433eaeee1d (patch)
treeab8981f9aae455ff0b14b81eb93406dcfcd56e9d /drivers/usb/dwc2
parentc363af9ce3db7e374b37e0509ccf31f8da4da404 (diff)
downloadlinux-b29b494bcc2e612e3abcd1b136db25433eaeee1d.tar.xz
usb: dwc2: Reset DEVADDR after exiting gadget hibernation.
Initially resetting device address was done in dwc2_hsotg_irq() interrupt handler. However, when core is hibernated USB RESET is not handled in dwc2_hsotg_irq() handler, instead USB RESET interrupt is handled in dwc2_handle_gpwrdn_intr() handler. - Added reset device address to zero when core exits from gadget hibernation. Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> Signed-off-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> Link: https://lore.kernel.org/r/20210416124659.652CFA005C@mailhost.synopsys.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2')
-rw-r--r--drivers/usb/dwc2/gadget.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 2f50f3e62caa..e6bb1bdb2760 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -5305,6 +5305,10 @@ int dwc2_gadget_exit_hibernation(struct dwc2_hsotg *hsotg,
dwc2_writel(hsotg, dr->dcfg, DCFG);
dwc2_writel(hsotg, dr->dctl, DCTL);
+ /* On USB Reset, reset device address to zero */
+ if (reset)
+ dwc2_clear_bit(hsotg, DCFG, DCFG_DEVADDR_MASK);
+
/* De-assert Wakeup Logic */
gpwrdn = dwc2_readl(hsotg, GPWRDN);
gpwrdn &= ~GPWRDN_PMUACTV;