From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Date: Tue, 11 Jul 2017 10:25:13 +0000 (+0400)
Subject: usb: dwc2: gadget: On USB RESET reset device address to zero
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=307bc11fcdf9f911a1adacf9e77fe1c490041ee3;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

usb: dwc2: gadget: On USB RESET reset device address to zero

Reseted DEVADDR field in DCFG to zero on USB RESET.

Device address in DCFG register does not reset to zero,
which required to pass enumeration, after disconnect and
reconnect.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index bc3b3fda5000..c4066cd77e47 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3573,6 +3573,9 @@ irq_retry:
 		/* Report disconnection if it is not already done. */
 		dwc2_hsotg_disconnect(hsotg);
 
+		/* Reset device address to zero */
+		__bic32(hsotg->regs + DCFG, DCFG_DEVADDR_MASK);
+
 		if (usb_status & GOTGCTL_BSESVLD && connected)
 			dwc2_hsotg_core_init_disconnected(hsotg, true);
 	}