diff mbox series

[v1,07/14] usb: dwc2: Reset DEVADDR after exiting gadget hibernation.

Message ID 15df61e95536a74b636f19ec142f27b62bb2f5e5.1555672441.git.arturp@synopsys.com (mailing list archive)
State New, archived
Headers show
Series usb: dwc2: Fix and improve power saving modes. | expand

Commit Message

Artur Petrosyan April 19, 2019, 11:24 a.m. UTC 
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.

Signed-off-by: Artur Petrosyan <arturp@synopsys.com>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
---
 drivers/usb/dwc2/gadget.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index dcb0fbb8bc42..8c3e1f1c1b0f 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -5234,6 +5234,10 @@  int dwc2_gadget_exit_hibernation(struct dwc2_hsotg *hsotg,
 	/* Restore GUSBCFG, DCFG and DCTL */
 	dwc2_writel(hsotg, gr->gusbcfg, GUSBCFG);
 	dwc2_writel(hsotg, dr->dcfg, DCFG);
+
+	/* On USB Reset, reset device address to zero */
+	if (reset)
+		dwc2_clear_bit(hsotg, DCFG, DCFG_DEVADDR_MASK);
 	dwc2_writel(hsotg, dr->dctl, DCTL);
 
 	/* De-assert Wakeup Logic */