linux-kernel - Re: [PATCH v3 7/9] soc: samsung: Update the CHIP ID DT binding documentation

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Date:   Wed, 14 Aug 2019 15:00:50 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc:     robh+dt@...nel.org, vireshk@...nel.org, devicetree@...r.kernel.org,
        kgene@...nel.org, pankaj.dubey@...sung.com,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-pm@...r.kernel.org,
        Bartłomiej Żołnierkiewicz 
        <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH v3 7/9] soc: samsung: Update the CHIP ID DT binding documentation

On Tue, 13 Aug 2019 at 17:09, Sylwester Nawrocki <s.nawrocki@...sung.com> wrote:
>
> This patch adds documentation of a new optional "samsung,asv-bin"
> property in the chipid device node and documents requirement of
> "syscon" compatible string.  These additions are needed to support
> Exynos ASV (Adaptive Supply Voltage) feature.
>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
> ---
> Changes since v2:
>  - none
>
> Changes since v1 (RFC):
>  - new patch
> ---
>  .../devicetree/bindings/arm/samsung/exynos-chipid.txt  | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.txt b/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.txt
> index 85c5dfd4a720..be3657e6c00c 100644
> --- a/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.txt
> +++ b/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.txt
> @@ -1,12 +1,18 @@
> -SAMSUNG Exynos SoCs Chipid driver.
> +SAMSUNG Exynos SoC series CHIPID subsystem
>
>  Required properties:
> -- compatible : Should at least contain "samsung,exynos4210-chipid".
> +- compatible : Should at least contain "samsung,exynos4210-chipid", "syscon".
>
>  - reg: offset and length of the register set
>
> +Optional properties:
> + - samsung,asv-bin : Adaptive Supply Voltage bin selection. This can be used
> +   to determine the ASV bin of an SoC if respective information is missing
> +   in the CHIPID registers or in the OTP memory. Possible values: 0...3.
> +
>  Example:
>         chipid@...00000 {
>                 compatible = "samsung,exynos4210-chipid";

Please update the example with new required compatible.

Best regards,
Krzysztof

>                 reg = <0x10000000 0x100>;
> +               samsung,asv-bin = <2>;
>         };
> --
> 2.17.1
>