linux-kernel - Re: [PATCH v2 02/16] arm64: dts: mediatek: mt8183-kukui: Override vgpu/vsram

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Date:   Fri, 24 Feb 2023 17:50:52 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     matthias.bgg@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v2 02/16] arm64: dts: mediatek: mt8183-kukui: Override
 vgpu/vsram_gpu constraints

On Thu, Feb 23, 2023 at 9:43 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> Override the PMIC-default voltage constraints for VGPU and VSRAM_GPU
> with the platform specific vmin/vmax for the highest possible SoC
> binning.

The maximum voltage numbers don't match the existing OPP table though.

> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> index de9778c85b94..63952c1251df 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
> @@ -401,6 +401,9 @@ &mt6358codec {
>  };
>
>  &mt6358_vgpu_reg {
> +       regulator-min-microvolt = <625000>;
> +       regulator-max-microvolt = <900000>;
> +
>         regulator-coupled-with = <&mt6358_vsram_gpu_reg>;
>         regulator-coupled-max-spread = <100000>;
>  };
> @@ -416,6 +419,9 @@ &mt6358_vsim2_reg {
>  };
>
>  &mt6358_vsram_gpu_reg {
> +       regulator-min-microvolt = <850000>;
> +       regulator-max-microvolt = <1000000>;
> +
>         regulator-coupled-with = <&mt6358_vgpu_reg>;
>         regulator-coupled-max-spread = <100000>;
>  };
> --
> 2.39.2
>