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.
> + 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
