From ef1e322f3e1d9a221a1ee6109f6571429ee9fb4a Mon Sep 17 00:00:00 2001
From: Caleb Connolly <caleb.connolly@linaro.org>
Date: Tue, 23 Apr 2024 16:15:06 +0200
Subject: [PATCH] usb: dwc3: support USB 3.1 controllers
The revision is different for these, add the additional check as in
xhci-dwc3 core_init code.
Equivalent upstream Linux patch:
690fb3718a70 ("usb: dwc3: Support Synopsys USB 3.1 IP")
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
Reviewed-by: Marek Vasut <marex@denx.de>
---
drivers/usb/dwc3/core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index c443d56746..a35b8c2f64 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -594,7 +594,8 @@ static int dwc3_core_init(struct dwc3 *dwc)
reg = dwc3_readl(dwc->regs, DWC3_GSNPSID);
/* This should read as U3 followed by revision number */
- if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) {
+ if ((reg & DWC3_GSNPSID_MASK) != 0x55330000 &&
+ (reg & DWC3_GSNPSID_MASK) != 0x33310000) {
dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
ret = -ENODEV;
goto err0;
--
2.39.5