usb: dwc3: core: Deprecate GCTL.CORESOFTRESET

[ Upstream commit afbd04e66e5d16ca3c7ea2e3c56eca25558eacf3 ]

Synopsys IP DWC_usb32 and DWC_usb31 version 1.90a and above deprecated
GCTL.CORESOFTRESET. The DRD mode switching flow is updated to remove the
GCTL soft reset. Add version checks to prevent using deprecated setting
in mode switching flow.

Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/9df529fde6e55f5508321b6bc26e92848044ef2b.1655338967.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 5cb1350ec66d1e42721daf33bce47c3aaf36b014..8adb2659979744ce93329e7bb179dd613357445d 100644 (file)
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -159,7 +159,8 @@ static void __dwc3_set_mode(struct work_struct *work)
        }
 
        /* For DRD host or device mode only */
-       if (dwc->desired_dr_role != DWC3_GCTL_PRTCAP_OTG) {
+       if ((DWC3_IP_IS(DWC3) || DWC3_VER_IS_PRIOR(DWC31, 190A)) &&
+           dwc->desired_dr_role != DWC3_GCTL_PRTCAP_OTG) {
                reg = dwc3_readl(dwc->regs, DWC3_GCTL);
                reg |= DWC3_GCTL_CORESOFTRESET;
                dwc3_writel(dwc->regs, DWC3_GCTL, reg);