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. The correct way to handle this will be through a usb-connector node, but for now we'll just mark the regulator as always-on so that it will be enabled automatically during boot.
Reviewed-by: Sumit Garg sumit.garg@linaro.org Reviewed-by: Neil Armstrong neil.armstrong@linaro.org Signed-off-by: Caleb Connolly caleb.connolly@linaro.org --- arch/arm/dts/sdm845-db845c-u-boot.dtsi | 9 +++++++++ 1 file changed, 9 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..906f9faa5451 --- /dev/null +++ b/arch/arm/dts/sdm845-db845c-u-boot.dtsi @@ -0,0 +1,9 @@ +// 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; +};