linux-kernel - Re: [PATCH 3/3] ARM: dts: imx7d-remarkable2: Enable the rohm,bd71815

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Date:   Fri, 16 Dec 2022 11:56:03 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Alistair Francis <alistair@...stair23.me>,
        krzysztof.kozlowski+dt@...aro.org, shawnguo@...nel.org,
        robh+dt@...nel.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, s.hauer@...gutronix.de,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Cc:     jernej.skrabec@...il.com, alistair23@...il.com, festevam@...il.com,
        kernel@...gutronix.de, linux@...linux.org.uk, arnd@...db.de
Subject: Re: [PATCH 3/3] ARM: dts: imx7d-remarkable2: Enable the rohm,bd71815

On 15/12/2022 12:56, Alistair Francis wrote:
> Add support for the rohm,bd71815 power controller controller for the
> reMarkable 2.

Thank you for your patch. There is something to discuss/improve.

> 
> Signed-off-by: Alistair Francis <alistair@...stair23.me>
> ---
>  arch/arm/boot/dts/imx7d-remarkable2.dts | 158 ++++++++++++++++++++++++
>  1 file changed, 158 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/imx7d-remarkable2.dts b/arch/arm/boot/dts/imx7d-remarkable2.dts
> index a138b292ec6a..e61ef3bd2eb9 100644
> --- a/arch/arm/boot/dts/imx7d-remarkable2.dts
> +++ b/arch/arm/boot/dts/imx7d-remarkable2.dts
> @@ -92,6 +92,10 @@ wifi_pwrseq: wifi_pwrseq {
>  	};
>  };
>  
> +&cpu0 {
> +	cpu-supply = <&buck1_reg>;
> +};
> +
>  &clks {
>  	assigned-clocks = <&clks IMX7D_CLKO2_ROOT_SRC>,
>  			  <&clks IMX7D_CLKO2_ROOT_DIV>;
> @@ -119,6 +123,147 @@ wacom_digitizer: digitizer@9 {
>  	};
>  };
>  
> +&i2c2 {
> +	clock-frequency = <100000>;
> +	pinctrl-names = "default", "sleep";
> +	pinctrl-0 = <&pinctrl_i2c2>;
> +	pinctrl-1 = <&pinctrl_i2c2>;
> +	status = "okay";
> +
> +	bd71815: pmic@4b {
> +		#clock-cells = <0>;

compatible and reg are usually first properties.

> +
> +		compatible = "rohm,bd71815";
> +		reg = <0x4b>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_bd71815>;
> +		interrupt-parent = <&gpio6>; /* PMIC_INT_B GPIO6_IO16 */
> +		interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&clks IMX7D_CLKO2_ROOT_SRC>;
> +		clock-output-names = "bd71815-32k-out";
> +
> +		regulators {
> +			#address-cells = <1>;
> +			#size-cells = <0>;

Does not look like you tested the DTS against bindings. Please run `make
dtbs_check` (see Documentation/devicetree/bindings/writing-schema.rst
for instructions).
> +
> +			buck1_reg: regulator@0 {
> +				reg = <0>;
> +				regulator-compatible = "buck1";
> +				regulator-min-microvolt = <800000>;
> +				regulator-max-microvolt = <2000000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +				regulator-ramp-delay = <1250>;
> +			};
> +
> +			buck2_reg: regulator@1 {
> +				reg = <1>;
> +				regulator-compatible = "buck2";
> +				regulator-min-microvolt = <800000>;
> +				regulator-max-microvolt = <2000000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +				regulator-ramp-delay = <1250>;
> +			};
> +
> +			buck3_reg: regulator@2 {
> +				reg = <2>;
> +				regulator-compatible = "buck3";
> +				regulator-min-microvolt = <1200000>;
> +				regulator-max-microvolt = <2700000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			buck4_reg: regulator@3 {
> +				reg = <3>;
> +				regulator-compatible = "buck4";
> +				regulator-min-microvolt = <1100000>;
> +				regulator-max-microvolt = <1850000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			buck5_reg: regulator@4 {
> +				reg = <4>;
> +				regulator-compatible = "buck5";
> +				regulator-min-microvolt = <1800000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			ldo1_reg: regulator@5 {
> +				reg = <5>;
> +				regulator-compatible = "ldo1";
> +				regulator-min-microvolt = <800000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			ldo2_reg: regulator@6 {
> +				reg = <6>;
> +				regulator-compatible = "ldo2";
> +				regulator-min-microvolt = <800000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			ldo3_reg: regulator@7 {
> +				reg = <7>;
> +				regulator-compatible = "ldo3";
> +				regulator-min-microvolt = <800000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			ldo4_reg: regulator@8 {
> +				reg = <8>;
> +				regulator-compatible = "ldo4";
> +				regulator-min-microvolt = <800000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			ldo5_reg: regulator@9 {
> +				reg = <9>;
> +				regulator-compatible = "ldo5";
> +				regulator-min-microvolt = <800000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			dvref_reg: regulator@10 {
> +				reg = <10>;

Aren't you now mixing hex and dec numbers?

> +				regulator-compatible = "dvref";
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
Best regards,
Krzysztof