On Tue, 19 Mar 2024 at 17:52, Caleb Connolly <caleb.conno...@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.conno...@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
>
