[PATCH 3/5] usb: dwc2: add reset controller dependency for probe via oftree

[Michael Grzeschik]

The dwc2 controller is connected to one reset controller which needs to be
triggered before it is able to operate. This patch adds the referenced reset
controller in the devicetree to be used.

Signed-off-by: Michael Grzeschik <m.grzeschik at pengutronix.de>
---
 drivers/usb/dwc2/dwc2.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/dwc2/dwc2.c b/drivers/usb/dwc2/dwc2.c
index 13455479ef..6f5127fc3b 100644
--- a/drivers/usb/dwc2/dwc2.c
+++ b/drivers/usb/dwc2/dwc2.c
@@ -12,6 +12,7 @@
 #include <errno.h>
 #include <driver.h>
 #include <linux/clk.h>
+#include <linux/reset.h>
 
 #include "dwc2.h"
 
@@ -61,6 +62,10 @@ static int dwc2_probe(struct device_d *dev)
 	if (ret)
 		goto clk_put;
 
+	ret = device_reset_us(dev, 2);
+	if (ret)
+		goto clk_disable;
+
 	dwc2->phy = phy_optional_get(dev, "usb2-phy");
 	if (IS_ERR(dwc2->phy)) {
 		ret = PTR_ERR(dwc2->phy);
-- 
2.29.2