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

[FUKAUMI Naoki]

Hi Diederik,

On 10/29/25 02:24, Diederik de Haas wrote:
> 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?

Oh, yes, it should be "5 ITX" :)

Thanks!

Best regards,

--
FUKAUMI Naoki
Radxa Computer (Shenzhen) Co., Ltd.

> 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>;
> 
>