This quirk is necessary for the Amlogic GXL SoCs otherwise the Port 2 PHY doesn't get out of suspend and U-Boot resets the board after:

XHCI timeout on event type 33... cannot recover. BUG: failure at drivers/usb/host/xhci-ring.c:474/xhci_wait_for_event()! BUG!

This quirk is also handled in the dwc3 core code, but until the xhci-dwc3 driver uses the dwc3 core, the quirk must be handled here to fix USB support on the Amlogic libretech-cc and libretech-ac board when a device is only plugged in the OTG port.

Cc: Yuri Frolov crashing.kernel@gmail.com Cc: Bin Meng bmeng.cn@gmail.com Fixes: dc9cdf859e ("usb: dwc3: Add DWC3 controller driver support") Signed-off-by: Neil Armstrong narmstrong@baylibre.com --- 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 9e8cae7ae4..55a1b22cf6 100644 --- a/drivers/usb/host/xhci-dwc3.c +++ b/drivers/usb/host/xhci-dwc3.c @@ -150,6 +150,9 @@ static int xhci_dwc3_probe(struct udevice *dev) if (dev_read_bool(dev, "snps,dis-u2-freeclk-exists-quirk")) reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;

+ if (dev_read_bool(dev, "snps,dis_u2_susphy_quirk")) + reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; + writel(reg, &dwc3_reg->g_usb2phycfg[0]);

dr_mode = usb_get_dr_mode(dev_of_offset(dev));