On Tue, 19 Mar 2024 at 17:52, Caleb Connolly caleb.connolly@linaro.org wrote:
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.
Can we send a fix for the Linux kernel DTS to correctly model it? We can then later get rid of this modification once that is accepted.
-Sumit
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 | 8 ++++++++ 1 file changed, 8 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..3c83e21251c4 --- /dev/null +++ b/arch/arm/dts/sdm845-db845c-u-boot.dtsi @@ -0,0 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0
+/* This GPIO must be turned on to enable the 5v VBUS
- supply on the USB port.
- */
+&usb_2_dwc3 {
vbus-supply = <&pcie0_3p3v_dual>;+};
-- 2.44.0