From c2c74f97afff9351077f2236ab6fa5638de9bd86 Mon Sep 17 00:00:00 2001
From: Patrick Delaunay <patrick.delaunay@st.com>
Date: Fri, 29 Mar 2019 15:42:16 +0100
Subject: [PATCH] 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>
---
drivers/usb/gadget/dwc2_udc_otg.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
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;
--
2.39.5