[PATCH] USB: dwc2: add a call to device_reset_optional()

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We need this for dwc2 to work on older ralink SoC like the rt3052.

Signed-off-by: John Crispin <blogic@xxxxxxxxxxx>
---
 drivers/usb/dwc2/hcd.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 4d918ed..8b5f966 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -47,6 +47,7 @@
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/usb.h>
+#include <linux/reset.h>
 
 #include <linux/usb/hcd.h>
 #include <linux/usb/ch11.h>
@@ -2764,6 +2765,11 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
 
 	dev_dbg(hsotg->dev, "DWC OTG HCD INIT\n");
 
+	/* reset the device if a reset controller is present */
+	retval = device_reset_optional(hsotg->dev);
+	if (retval && retval != -ENOSYS)
+		return retval;
+
 	/* Detect config values from hardware */
 	retval = dwc2_get_hwparams(hsotg);
 
-- 
1.7.10.4

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