From: Patrick Delaunay <patrick.delaunay@st.com>
Date: Fri, 29 Mar 2019 14:42:16 +0000 (+0100)
Subject: usb: dwc2: force reset assert before to probe the driver
X-Git-Tag: v2019.07-rc1~13^2~12
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=c2c74f97afff9351077f2236ab6fa5638de9bd86;p=oweals%2Fu-boot.git

usb: dwc2: force reset assert before to probe the driver

Reset the hardware to be sure of the device state.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
---

diff --git a/drivers/usb/gadget/dwc2_udc_otg.c b/drivers/usb/gadget/dwc2_udc_otg.c
index af16fc1ed4..8169fdbb11 100644
--- a/drivers/usb/gadget/dwc2_udc_otg.c
+++ b/drivers/usb/gadget/dwc2_udc_otg.c
@@ -1049,7 +1049,12 @@ static int dwc2_udc_otg_reset_init(struct udevice *dev,
 	if (ret)
 		return ret;
 
-	ret = reset_deassert_bulk(resets);
+	ret = reset_assert_bulk(resets);
+
+	if (!ret) {
+		udelay(2);
+		ret = reset_deassert_bulk(resets);
+	}
 	if (ret) {
 		reset_release_bulk(resets);
 		return ret;