usb: dwc3: gadget: fix GCTL programming

ensure a few bits are cleared before enabling
what we need.

Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 3 insertions, 6 deletions

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 1de4d3f87569..6c64c7385314 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1150,13 +1150,10 @@ static int dwc3_gadget_start(struct usb_gadget *g,
 
         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 
-        /*
-         * REVISIT: power down scale might be different
-         * depending on PHY used, need to pass that via platform_data
-         */
-        reg |= DWC3_GCTL_PWRDNSCALE(0x61a)
-                | DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_DEVICE);
+        reg &= ~DWC3_GCTL_SCALEDOWN(3);
+        reg &= ~DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG);
         reg &= ~DWC3_GCTL_DISSCRAMBLE;
+        reg |= DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_DEVICE);
 
         /*
          * WORKAROUND: DWC3 revisions <1.90a have a bug