linux-kernel - Re: [PATCH V3 05/11] arm64: tegra: Add regulators required for PCIe

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Date:   Wed, 29 Jun 2022 08:34:38 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Vidya Sagar <vidyas@...dia.com>, bhelgaas@...gle.com,
        lorenzo.pieralisi@....com, robh+dt@...nel.org,
        thierry.reding@...il.com, jonathanh@...dia.com
Cc:     kishon@...com, vkoul@...nel.org, kw@...ux.com,
        p.zabel@...gutronix.de, mperttunen@...dia.com,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org, kthota@...dia.com,
        mmaddireddy@...dia.com, sagar.tv@...il.com
Subject: Re: [PATCH V3 05/11] arm64: tegra: Add regulators required for PCIe

On 29/06/2022 08:04, Vidya Sagar wrote:
> Add regulator supplies required for PCIe functionality. The supplies
> include 1.8V, 3.3V and 12V.
> 
> Signed-off-by: Vidya Sagar <vidyas@...dia.com>
> ---
> V3:
> * New patch in this series
> 
>  .../boot/dts/nvidia/tegra234-p3701-0000.dtsi  | 24 +++++++++++++++++++
>  .../boot/dts/nvidia/tegra234-p3737-0000.dtsi  | 23 ++++++++++++++++++
>  2 files changed, 47 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/nvidia/tegra234-p3701-0000.dtsi b/arch/arm64/boot/dts/nvidia/tegra234-p3701-0000.dtsi
> index 798de9226ba5..d53901ba45f6 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra234-p3701-0000.dtsi
> +++ b/arch/arm64/boot/dts/nvidia/tegra234-p3701-0000.dtsi
> @@ -6,6 +6,30 @@
>  	model = "NVIDIA Jetson AGX Orin";
>  	compatible = "nvidia,p3701-0000", "nvidia,tegra234";
>  
> +	fixed-regulators {
> +		compatible = "simple-bus";
> +		device_type = "fixed-regulators";
> +		#address-cells = <0x1>;
> +		#size-cells = <0x0>;

This is not a bus, fixed regulators are not part of some bus.

> +
> +		p3701_vdd_1v8_ls: regulator@3 {
> +			compatible = "regulator-fixed";
> +			reg = <3>;

This fails schema. No.

> +			regulator-name = "vdd-1v8-ls-sw5";
> +			regulator-min-microvolt = <1800000>;
> +			regulator-max-microvolt = <1800000>;
> +			regulator-always-on;
> +		};

Missing blank line.

> +		p3701_vdd_AO_1v8: regulator@5 {
> +			compatible = "regulator-fixed";
> +			reg = <5>;
> +			regulator-name = "vdd-AO-1v8-sw2";
> +			regulator-min-microvolt = <1800000>;
> +			regulator-max-microvolt = <1800000>;
> +			regulator-always-on;
> +		};
> +	};
> +
>  	bus@0 {
>  		spi@...0000 {
>  			status = "okay";
> diff --git a/arch/arm64/boot/dts/nvidia/tegra234-p3737-0000.dtsi b/arch/arm64/boot/dts/nvidia/tegra234-p3737-0000.dtsi
> index a85993c85e45..bb503643dd38 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra234-p3737-0000.dtsi
> +++ b/arch/arm64/boot/dts/nvidia/tegra234-p3737-0000.dtsi
> @@ -2,4 +2,27 @@
>  
>  / {
>  	compatible = "nvidia,p3737-0000";
> +
> +	fixed-regulators {
> +		p3737_vdd_3v3_pcie: regulator@105 {
> +			compatible = "regulator-fixed";
> +			reg = <105>;
> +			regulator-name = "vdd-3v3-pcie";
> +			regulator-min-microvolt = <3300000>;
> +			regulator-max-microvolt = <3300000>;
> +			gpio = <&gpio TEGRA234_MAIN_GPIO(Z, 2) 0>;
> +			enable-active-high;
> +			regulator-boot-on;
> +		};

Same comments.

> +		p3737_vdd_12v_pcie: regulator@114 {
> +			compatible = "regulator-fixed";
> +			reg = <114>;
> +			regulator-name = "vdd-12v-pcie";
> +			regulator-min-microvolt = <12000000>;
> +			regulator-max-microvolt = <12000000>;
> +			gpio = <&gpio TEGRA234_MAIN_GPIO(A, 1) 1>;
> +			regulator-boot-on;
> +			enable-active-low;
> +		};
> +	};
>  };


Best regards,
Krzysztof