Hi Krzysztof
On 23. 7. 14. 14:26, Krzysztof Kozlowski wrote:
> On 14/07/2023 07:15, Jaewon Kim wrote:
>> Add pwm node to support fan on exynosautov9-sadk board.
>> PWM channel 3 of ExynosAutov9 is connected to fan for SoC cooling
>> in SADK board.
>>
>> Signed-off-by: Jaewon Kim <jaewon02.kim@xxxxxxxxxxx>
>> ---
>> arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts | 6 ++++++
>> arch/arm64/boot/dts/exynos/exynosautov9.dtsi | 9 +++++++++
>> 2 files changed, 15 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts b/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts
>> index 898c2fc345ed..e717bb1cad81 100644
>> --- a/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts
>> +++ b/arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts
>> @@ -50,6 +50,12 @@
>> };
>> };
>>
>> +&pwm {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pwm_tout3>;
>> + status = "okay";
>> +};
>> +
>> &serial_0 {
>> pinctrl-0 = <&uart0_bus_dual>;
>> status = "okay";
>> diff --git a/arch/arm64/boot/dts/exynos/exynosautov9.dtsi b/arch/arm64/boot/dts/exynos/exynosautov9.dtsi
>> index d3c5cdeff47f..e8860b03fe89 100644
>> --- a/arch/arm64/boot/dts/exynos/exynosautov9.dtsi
>> +++ b/arch/arm64/boot/dts/exynos/exynosautov9.dtsi
>> @@ -1560,6 +1560,15 @@
>> samsung,syscon-phandle = <&pmu_system_controller>;
>> samsung,cluster-index = <1>;
>> };
>> +
>> + pwm: pwm@103f0000 {
>> + compatible = "samsung,exynos4210-pwm";
> Thanks for the patch. I think we should change existing practice for
> Samsung SoC and start adding dedicated specific compatible for such
> blocks. It's the same practice we follow in other SoCs. It's also
> recommendation I give to other platforms.
>
> Therefore this should be "samsung,exynosautov9-pwm",
> "samsung,exynos4210-pwm". Feel free to update other DTS as well.
Okay, I will update "samsung,exynosautov9-pwm" compatible in next version.
>
>> + reg = <0x103f0000 0x100>;
>> + samsung,pwm-outputs = <0>, <1>, <2>, <3>;
>> + #pwm-cells = <3>;
>> + clocks = <&xtcxo>;
> This does not look like correct clock. Are you sure XTCXO goes to PWM?
>
>
>
> Best regards,
> Krzysztof
>
>
Thanks
Jaewon Kim
