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FROMGIT: usb: dwc3: core: Deprecate GCTL.CORESOFTRESET

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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>

(cherry picked from commit afbd04e66e5d16ca3c7ea2e3c56eca25558eacf3 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-next)

BUG: 238836938
Change-Id: I69ea5ee3b9cf25d1d972b261c8dff59c50437c04
Signed-off-by: Udipto Goswami <quic_ugoswami@quicinc.com>
This commit is contained in:
Thinh Nguyen
2022-06-15 17:24:32 -07:00
committed by Udipto Goswami
parent c5eb0edfde
commit 321bf845e1
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/dwc3/core.c
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@@ -157,7 +157,8 @@ 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);