The USB VBUS supply for the type-A port is enabled via a GPIO regulator. This is incorrectly modelled in Linux where only the PCIe dependency is expressed. Add a U-Boot specific dtsi snippet so that this supply will get enabled when initialising USB.
Signed-off-by: Caleb Connolly caleb.connolly@linaro.org --- arch/arm/dts/sdm845-db845c-u-boot.dtsi | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/arch/arm/dts/sdm845-db845c-u-boot.dtsi b/arch/arm/dts/sdm845-db845c-u-boot.dtsi new file mode 100644 index 000000000000..8d55d5dd7632 --- /dev/null +++ b/arch/arm/dts/sdm845-db845c-u-boot.dtsi @@ -0,0 +1,16 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Needed for Linux to boot from USB, otherwise if PCIe driver is not in initramfs + * the VBUS supply will never get turned on. + * https://lore.kernel.org/linux-arm-msm/20240320122515.3243711-1-caleb.connoll... + */ +&pcie0_3p3v_dual { + regulator-always-on; +}; + +/* This GPIO must be turned on to enable the 5v VBUS + * supply on the USB port. + */ +&usb_2_dwc3 { + vbus-supply = <&pcie0_3p3v_dual>; +};