linux-kernel - Re: [PATCH v2 8/8] arm64: dts: mediatek: cherry: Enable MT6315 regulators on SPMI bus

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Message-ID: <CAGXv+5Gn4CP=iJ2M8vfstdHLb6JRsgYGXQiV5WtHzv3cFWSjqA@mail.gmail.com>
Date:   Mon, 25 Jul 2022 17:08:10 +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,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Tinghan Shen <tinghan.shen@...iatek.com>
Subject: Re: [PATCH v2 8/8] arm64: dts: mediatek: cherry: Enable MT6315
 regulators on SPMI bus

On Thu, Jul 21, 2022 at 10:54 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> All machines in the Cherry platform use MT6315 over SPMI: add the
> two instances, providing Vbcpu and Vgpu regulators.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Tested-by: Chen-Yu Tsai <wenst@...omium.org>

> ---
>  .../boot/dts/mediatek/mt8195-cherry.dtsi      | 42 +++++++++++++++++++
>  1 file changed, 42 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> index 9086a440a995..6219544e9912 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> @@ -5,6 +5,7 @@
>
>  #include <dt-bindings/gpio/gpio.h>
>  #include <dt-bindings/leds/common.h>
> +#include <dt-bindings/spmi/spmi.h>
>  #include "mt8195.dtsi"
>  #include "mt6359.dtsi"
>
> @@ -979,6 +980,47 @@ usb_c1: connector@1 {
>         };
>  };
>
> +&spmi {
> +       #address-cells = <2>;
> +       #size-cells = <0>;
> +
> +       mt6315@6 {
> +               compatible = "mediatek,mt6315-regulator";
> +               reg = <0x6 SPMI_USID>;
> +
> +               regulators {
> +                       mt6315_6_vbuck1: vbuck1 {
> +                               regulator-compatible = "vbuck1";
> +                               regulator-name = "Vbcpu";
> +                               regulator-min-microvolt = <300000>;
> +                               regulator-max-microvolt = <1193750>;

Tinghan,

Could you help confirm these numbers? They must be valid for the
big cluster supply, not the PMIC.

> +                               regulator-enable-ramp-delay = <256>;
> +                               regulator-ramp-delay = <6250>;
> +                               regulator-allowed-modes = <0 1 2>;
> +                               regulator-always-on;
> +                       };
> +               };
> +       };
> +
> +       mt6315@7 {
> +               compatible = "mediatek,mt6315-regulator";
> +               reg = <0x7 SPMI_USID>;
> +
> +               regulators {
> +                       mt6315_7_vbuck1: vbuck1 {
> +                               regulator-compatible = "vbuck1";
> +                               regulator-name = "Vgpu";
> +                               regulator-min-microvolt = <625000>;
> +                               regulator-max-microvolt = <1193750>;

Same here for the GPU.


Thanks
ChenYu


> +                               regulator-enable-ramp-delay = <256>;
> +                               regulator-ramp-delay = <6250>;
> +                               regulator-allowed-modes = <0 1 2>;
> +                               regulator-always-on;
> +                       };
> +               };
> +       };
> +};
> +
>  &u3phy0 {
>         status = "okay";
>  };
> --
> 2.35.1
>
>