linux-kernel - Re: [PATCH] arm64: dts: meson-s4-s805x2: add 12V/3.3V/1.8V/vddcpu nodes for Regulator

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Date:   Mon, 7 Nov 2022 18:27:05 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Chao Zhang <chao.zhang@...ogic.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Rob Herring <robh+dt@...nel.org>,
        Amjad Ouled-Ameur <aouledameur@...libre.com>
Subject: Re: [PATCH] arm64: dts: meson-s4-s805x2: add 12V/3.3V/1.8V/vddcpu
 nodes for Regulator

Hi,

On 07/11/2022 03:11, Chao Zhang wrote:
> From: "chao.zhang" <chao.zhang@...ogic.com>
> 
> Add 12V/3.3V/1.8V/vddcpu nodes for Regulator on Amlogic S4 SoCs.
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> Signed-off-by: Amjad Ouled-Ameur <aouledameur@...libre.com>
> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> Link: https://lore.kernel.org/r/20221004-up-aml-fix-spi-v4-3-0342d8e10c49@baylibre.com
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>

I think you did a bad copy paste because those lines comes from another already applied commit.

Please add your own Signed-off-by.

> ---
>   .../dts/amlogic/meson-s4-s805x2-aq222.dts     | 85 +++++++++++++++++++
>   arch/arm64/boot/dts/amlogic/meson-s4.dtsi     |  4 +
>   2 files changed, 89 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/meson-s4-s805x2-aq222.dts b/arch/arm64/boot/dts/amlogic/meson-s4-s805x2-aq222.dts
> index 8ffbcb2b1ac5..80c959766b79 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-s4-s805x2-aq222.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-s4-s805x2-aq222.dts
> @@ -22,6 +22,91 @@ memory@0 {
>   		device_type = "memory";
>   		reg = <0x0 0x0 0x0 0x40000000>;
>   	};
> +	main_12v: regulator-main_12v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "12V";
> +		regulator-min-microvolt = <12000000>;
> +		regulator-max-microvolt = <12000000>;
> +		regulator-always-on;
> +	};
> +
> +	vddao_3v3: regulator-vddao_3v3 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VDDAO_3V3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		vin-supply = <&main_12v>;
> +		regulator-always-on;
> +	};
> +
> +	vddio_ao1v8: regulator-vddio_ao1v8 {
> +	       compatible = "regulator-fixed";
> +	       regulator-name = "VDDIO_AO1V8";
> +	       regulator-min-microvolt = <1800000>;
> +	       regulator-max-microvolt = <1800000>;
> +	       vin-supply = <&vddao_3v3>;
> +	       regulator-always-on;
> +	};
> +
> +	vddcpu: regulator-vddcpu {
> +		/*
> +		 * SY8120B1ABC DC/DC Regulator.
> +		 */
> +		compatible = "pwm-regulator";
> +
> +		regulator-name = "VDDCPU";
> +		regulator-min-microvolt = <689000>;
> +		regulator-max-microvolt = <1049000>;
> +
> +		vin-supply = <&main_12v>;
> +
> +		pwms = <&pwm_ij 1 1500 0>;

Without the PWM node this won't apply.

> +		pwm-dutycycle-range = <100 0>;
> +
> +		regulator-boot-on;
> +		regulator-always-on;
> +		max-duty-cycle = <1500>;
> +		/* Voltage Duty-Cycle */
> +		voltage-table = <1049000 0>,
> +				<1039000 3>,
> +				<1029000 6>,
> +				<1019000 9>,
> +				<1009000 12>,
> +				<999000 14>,
> +				<989000 17>,
> +				<979000 20>,
> +				<969000 23>,
> +				<959000 26>,
> +				<949000 29>,
> +				<939000 31>,
> +				<929000 34>,
> +				<919000 37>,
> +				<909000 40>,
> +				<899000 43>,
> +				<889000 45>,
> +				<879000 48>,
> +				<869000 51>,
> +				<859000 54>,
> +				<849000 56>,
> +				<839000 59>,
> +				<829000 62>,
> +				<819000 65>,
> +				<809000 68>,
> +				<799000 70>,
> +				<789000 73>,
> +				<779000 76>,
> +				<769000 79>,
> +				<759000 81>,
> +				<749000 84>,
> +				<739000 87>,
> +				<729000 89>,
> +				<719000 92>,
> +				<709000 95>,
> +				<699000 98>,
> +				<689000 100>;

This is wrong, the regulator-min-microvolt and regulator-max-microvolt + pwm-dutycycle-range is enough.

> +		status = "okay";
> +	};
> +
>   
>   };
>   
> diff --git a/arch/arm64/boot/dts/amlogic/meson-s4.dtsi b/arch/arm64/boot/dts/amlogic/meson-s4.dtsi
> index ad50cba42d19..405a5af9ac1d 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-s4.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-s4.dtsi
> @@ -17,6 +17,7 @@ cpu0: cpu@0 {
>   			compatible = "arm,cortex-a35";
>   			reg = <0x0 0x0>;
>   			enable-method = "psci";
> +			cpu-supply = <&vddcpu>;
>   		};
>   
>   		cpu1: cpu@1 {
> @@ -24,6 +25,7 @@ cpu1: cpu@1 {
>   			compatible = "arm,cortex-a35";
>   			reg = <0x0 0x1>;
>   			enable-method = "psci";
> +			cpu-supply = <&vddcpu>;
>   		};
>   
>   		cpu2: cpu@2 {
> @@ -31,6 +33,7 @@ cpu2: cpu@2 {
>   			compatible = "arm,cortex-a35";
>   			reg = <0x0 0x2>;
>   			enable-method = "psci";
> +			cpu-supply = <&vddcpu>;
>   		};
>   
>   		cpu3: cpu@3 {
> @@ -38,6 +41,7 @@ cpu3: cpu@3 {
>   			compatible = "arm,cortex-a35";
>   			reg = <0x0 0x3>;
>   			enable-method = "psci";
> +			cpu-supply = <&vddcpu>;
>   		};
>   	};
>   

Without a clock, this is useless.

Neil