[PATCH] usb: xhci-dwc3: Bail out if "dr_mode" is "peripheral"

[Siddharth Vadapalli]

Since the compatible "snps,dwc3" can be specified in the device-tree for
the Designware USB Controller configured for not only Host and OTG modes
of operation, but also for Peripheral mode of operation, bail out if
"dr_mode" is "peripheral".

Signed-off-by: Siddharth Vadapalli <s-vadapalli at ti.com>
---

Hello,

This patch is based on commit
448add55297 Merge branch 'master' of https://source.denx.de/u-boot/custodians/u-boot-pmic
of the master branch of U-Boot.

Regards,
Siddharth.

 drivers/usb/host/xhci-dwc3.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index e3e0ceff43e..7b1311503fe 100644
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -208,6 +208,9 @@ static int xhci_dwc3_probe(struct udevice *dev)
 	writel(reg, &dwc3_reg->g_usb2phycfg[0]);
 
 	dr_mode = usb_get_dr_mode(dev_ofnode(dev));
+	if (dr_mode == USB_DR_MODE_PERIPHERAL)
+		return -ENODEV;
+
 	if (dr_mode == USB_DR_MODE_OTG &&
 	    dev_read_bool(dev, "usb-role-switch")) {
 		dr_mode = usb_get_role_switch_default_mode(dev_ofnode(dev));
-- 
2.43.0