[PATCH 2/2] arm64: dts: rockchip: Fix USB Type-C host mode for Radxa ROCK 5 ITX

[Diederik de Haas]

On Tue Oct 28, 2025 at 12:50 PM CET, FUKAUMI Naoki wrote:
> The USB Type-C port on the Radxa ROCK 5B+/5T supports Dual-Role-Data
> and Dual-Role-Power. However, currently it cannot operate as host/
> source.

You describe the ROCK 5B+/5T while modifying the 5 ITX. If the exact
same logic applies to the 5 ITX, then ``s/5B+\/5T/5 ITX/`` above?

Cheers,
  Diederik

> By setting "power-role" to "dual" and "try-power-role" to "sink"
> (along with adding related properties), the data role can operate as
> host.
>
> Unfortunately, a remaining issue is that when a USB 3.0 SuperSpeed
> device's orientation is reverse, the root port is detected but the
> device itself is not. This must be addressed separately.
> (USB 2.0/1.1 devices operate even in reverse orientation.)
>
> Fixes: 31390eb8ffbf2 ("arm64: dts: rockchip: add ROCK 5 ITX board")
> Signed-off-by: FUKAUMI Naoki <naoki at radxa.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
> index bc8140883de47..1664f85db4aaa 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
> @@ -484,9 +484,14 @@ usb_con: connector {
>  			compatible = "usb-c-connector";
>  			data-role = "dual";
>  			label = "USB-C";
> -			power-role = "source";
> +			op-sink-microwatt = <50000>;
> +			/* fusb302 supports PD Rev 2.0 Ver 1.2 */
> +			pd-revision = /bits/ 8 <0x2 0x0 0x1 0x2>;
> +			power-role = "dual";
> +			sink-pdos = <PDO_FIXED(5000, 10, PDO_FIXED_USB_COMM)>;
>  			source-pdos =
>  				<PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)>;
> +			try-power-role = "sink";
>  
>  			ports {
>  				#address-cells = <1>;