linux-kernel - Re: [PATCH 1/6] dt-bindings: power: pd-samsung: Add Exynos850 support

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Date:   Thu, 9 Mar 2023 10:15:14 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sam Protsenko <semen.protsenko@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Alim Akhtar <alim.akhtar@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Chanho Park <chanho61.park@...sung.com>,
        David Virag <virag.david003@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] dt-bindings: power: pd-samsung: Add Exynos850 support

On 09/03/2023 00:09, Sam Protsenko wrote:
> Document the compatible string for Exynos850 power domains controller.
> Also add power domain indices which can be used in "samsung,pd-index"

There is no such property...

> property to specify a particular power domain in the device tree.
> 
> Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
> ---
>  .../devicetree/bindings/power/pd-samsung.yaml   |  1 +
>  MAINTAINERS                                     |  1 +
>  .../dt-bindings/power/samsung,exynos850-power.h | 17 +++++++++++++++++
>  3 files changed, 19 insertions(+)
>  create mode 100644 include/dt-bindings/power/samsung,exynos850-power.h
> 
> diff --git a/Documentation/devicetree/bindings/power/pd-samsung.yaml b/Documentation/devicetree/bindings/power/pd-samsung.yaml
> index 9c2c51133457..a353a705292c 100644
> --- a/Documentation/devicetree/bindings/power/pd-samsung.yaml
> +++ b/Documentation/devicetree/bindings/power/pd-samsung.yaml
> @@ -21,6 +21,7 @@ properties:
>      enum:
>        - samsung,exynos4210-pd
>        - samsung,exynos5433-pd
> +      - samsung,exynos850-pd
>  
>    reg:
>      maxItems: 1
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 8d5bc223f305..53e11e48639c 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -2720,6 +2720,7 @@ F:	drivers/pwm/pwm-samsung.c
>  F:	drivers/soc/samsung/
>  F:	drivers/tty/serial/samsung*
>  F:	include/clocksource/samsung_pwm.h
> +F:	include/dt-bindings/power/samsung,*
>  F:	include/linux/platform_data/*s3c*
>  F:	include/linux/serial_s3c.h
>  F:	include/linux/soc/samsung/
> diff --git a/include/dt-bindings/power/samsung,exynos850-power.h b/include/dt-bindings/power/samsung,exynos850-power.h
> new file mode 100644
> index 000000000000..a8d877b5515a
> --- /dev/null
> +++ b/include/dt-bindings/power/samsung,exynos850-power.h

Filename matching compatible, so samsung,exynos850-pd.h... but I
actually wonder why do we need it. How power domains are organized in
Exynos850?

Best regards,
Krzysztof