The commit a4180c369607 ("arm64: zynqmp: Add mode-pin GPIO controller DT node") added usb phy reset over bootmode pins by default on usb0 only. zcu100 is using usb0 as peripheral and usb1 as host. Unfortunately reset line is shared for both usb ulpi phys but usb_rst_b is connected to usb5744 hub which is used only in host mode. Especially this chip requires reset to operate properly that's why better assign gpio reset to usb1 instead of usb0. Without this change usb start crashed when runs.
Signed-off-by: Michal Simek michal.simek@amd.com ---
arch/arm/dts/zynqmp-zcu100-revC.dts | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm/dts/zynqmp-zcu100-revC.dts b/arch/arm/dts/zynqmp-zcu100-revC.dts index 78c325076006..a84cd86694e2 100644 --- a/arch/arm/dts/zynqmp-zcu100-revC.dts +++ b/arch/arm/dts/zynqmp-zcu100-revC.dts @@ -569,6 +569,7 @@ pinctrl-0 = <&pinctrl_usb0_default>; phy-names = "usb3-phy"; phys = <&psgtr 2 PHY_TYPE_USB3 0 0>; + /delete-property/ reset-gpios; };
&dwc3_0 { @@ -584,6 +585,7 @@ pinctrl-0 = <&pinctrl_usb1_default>; phy-names = "usb3-phy"; phys = <&psgtr 3 PHY_TYPE_USB3 1 0>; + reset-gpios = <&modepin_gpio 1 GPIO_ACTIVE_LOW>; };
&dwc3_1 {