DWC_usb31 controller has a different UsbRxPktCnt bit fields from
GRXTHRCFG register. Check for DWC_usb31 IP revision to read the
appropriate value.

Signed-off-by: Thinh Nguyen <thi...@synopsys.com>
---
 drivers/usb/dwc3/gadget.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 0bbc21ab6912..24cbd79481e8 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1858,7 +1858,11 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
         * bursts of data without going through any sort of endpoint throttling.
         */
        reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG);
-       reg &= ~DWC3_GRXTHRCFG_PKTCNTSEL;
+       if (dwc3_is_usb31(dwc))
+               reg &= ~DWC31_GRXTHRCFG_PKTCNTSEL;
+       else
+               reg &= ~DWC3_GRXTHRCFG_PKTCNTSEL;
+
        dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg);
 
        dwc3_gadget_setup_nump(dwc);
-- 
2.11.0

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