Since commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"), the USB ports on odroid-XU4 don't work anymore. Inserting an usb key (USB2.0) on the USB3.0 port result in: [ 64.488264] xhci-hcd xhci-hcd.2.auto: Port resume took longer than 20000 msec, port status = 0xc400fe3 [ 74.568156] xhci-hcd xhci-hcd.2.auto: xHCI host not responding to stop endpoint command. [ 74.574806] xhci-hcd xhci-hcd.2.auto: Assuming host is dying, halting host. [ 74.601970] xhci-hcd xhci-hcd.2.auto: HC died; cleaning up [ 74.606276] usb 3-1: USB disconnect, device number 2 [ 74.613565] usb 4-1: USB disconnect, device number 2 [ 74.621208] usb usb3-port1: couldn't allocate usb_device NB: it's not related to USB2.0 devices, I get the same result with an USB3.0 device (SATA to USB3 for instance). NB2: it doesn't happen on an odriod-XU3 board, that doesn't have the realtek RTL8153 chip. If the lines: if (dwc->revision > DWC3_REVISION_194A) reg |= DWC3_GUSB3PIPECTL_SUSPHY; are commented out, the USB3.0 start working. For a full analyse: https://lkml.org/lkml/2017/1/18/678 Felipe suggested that suspend should be disabled temporarily while what's wrong with DCW3 is figured out. Tested on Odroid XU4 Suggested-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Tested-by: Richard Genoud <richard.genoud@xxxxxxxxx> Signed-off-by: Richard Genoud <richard.genoud@xxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # 4.4+ Fixes: 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores") --- arch/arm/boot/dts/exynos5422-odroidxu4.dts | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/boot/dts/exynos5422-odroidxu4.dts b/arch/arm/boot/dts/exynos5422-odroidxu4.dts index 2faf88627a48..f62dbd9b5ad3 100644 --- a/arch/arm/boot/dts/exynos5422-odroidxu4.dts +++ b/arch/arm/boot/dts/exynos5422-odroidxu4.dts @@ -43,6 +43,15 @@ status = "okay"; }; +&usbdrd_dwc3_0 { + /* + * without that, usb devices are not recognized when + * they are plugged. + * cf: https://lkml.org/lkml/2017/1/18/678 + */ + snps,dis_u3_susphy_quirk; +}; + &usbdrd_dwc3_1 { dr_mode = "host"; }; -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html