Re: [PATCH 5/5] arm64: tegra: smaug: Add usb-role-switch support

Jon Hunter
2026-01-12T22:03:45Z

On 04/12/2025 21:27, Diogo Ivo wrote:
> The USB2 port on Smaug is configured for OTG operation but lacked the
> required 'usb-role-switch' property, leading to a failed probe and a
> non-functioning USB port. Add the property along with setting the default
> role to host.
>
> Signed-off-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
> ---
> arch/arm64/boot/dts/nvidia/tegra210-smaug.dts | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
> index b8d854f90be7..49bf23d6f593 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
> +++ b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
> @@ -1809,6 +1809,8 @@ usb2-0 {
> status = "okay";
> vbus-supply = <&usbc_vbus>;
> mode = "otg";
> + usb-role-switch;
> + role-switch-default-mode = "host";
> };

This change does add the following warning when building with CHECK_DTBS
...

arch/arm64/boot/dts/nvidia/tegra210-smaug.dtb: padctl@7009f000 (nvidia,tegra210-xusb-padctl): ports:usb2-0: 'role-switch-default-mode' does not match any of the regexes: '^pinctrl-[0-9]+$'
from schema $id: http://devicetree.org/schemas/phy/nvidia,tegra210-xusb-padctl.yaml

I know that there are many warnings seen for the smaug DTB, but it would
be good to ensure we don't add more.

Cheers
Jon

--
nvpublic