Re: [PATCH v13 08/10] arm64: dts: qcom: sc8280xp: Add multiport controller node for SC8280

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On 23/10/2023 18:09, Johan Hovold wrote:
> On Sat, Oct 07, 2023 at 09:18:04PM +0530, Krishna Kurapati wrote:
>> Add USB and DWC3 node for tertiary port of SC8280 along with multiport
>> IRQ's and phy's. This will be used as a base for SA8295P and SA8295-Ride
>> platforms.
>>
>> Signed-off-by: Krishna Kurapati <quic_kriskura@xxxxxxxxxxx>
>> ---
>>  arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 84 ++++++++++++++++++++++++++
>>  1 file changed, 84 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
>> index cad59af7ccef..5f64f75b07db 100644
>> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
>> @@ -3330,6 +3330,90 @@ system-cache-controller@9200000 {
>>  			interrupts = <GIC_SPI 582 IRQ_TYPE_LEVEL_HIGH>;
>>  		};
>>  
>> +		usb_2: usb@a4f8800 {
>> +			compatible = "qcom,sc8280xp-dwc3-mp", "qcom,dwc3";
> 
> So you went with a dedicated compatible even though you are now
> inferring the number of ports from the interrupts property.
> 
> Should we drop that compatible again or is there any other reason to
> keep a separate one?

Please keep the dedicated compatible even if currently it is not used.
https://elixir.bootlin.com/linux/v6.1-rc1/source/Documentation/devicetree/bindings/writing-bindings.rst#L42

Best regards,
Krzysztof




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