linux-kernel - Re: [PATCH v2 4/6] arm64: dts: qcom: sc8280xp: Add reference device

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Message-ID: <YrMUkL3fh2vcmo4l@hovoldconsulting.com>
Date:   Wed, 22 Jun 2022 15:09:36 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Jassi Brar <jassisinghbrar@...il.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/6] arm64: dts: qcom: sc8280xp: Add reference device

On Tue, Jun 21, 2022 at 09:12:22PM -0700, Bjorn Andersson wrote:
> Add basic support for the SC8280XP reference device, which allows it to
> boot to a shell (using EFIFB) with functional storage (UFS), USB,
> keyboard, touchpad, touchscreen, backlight and remoteprocs.
> 
> The PMICs are, per socinfo, reused from other platforms. But given that
> the address of the PMICs doesn't match other cases and that it's
> desirable to label things according to the schematics a new dtsi file is
> created to represent the reference combination of PMICs.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
> 
> Changes since v1:
> - Reordered "status" last
> - Fixed invalid PMIC gpio 0
> - Replaced "hid" name with touchscreen, touchpad and keyboard
> - Added &xo_board_clk frequency

> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> @@ -0,0 +1,432 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) 2021, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2022, Linaro Limited
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/gpio/gpio.h>

> +#include <dt-bindings/input/gpio-keys.h>

This one is unused and should be dropped.

> +#include <dt-bindings/input/input.h>

And this one belongs in sc8280xp-pmics.dtsi where it's used.

> +#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
> +
> +#include "sc8280xp.dtsi"
> +#include "sc8280xp-pmics.dtsi"
> +
> +/ {
> +	model = "Qualcomm SC8280XP CRD";
> +	compatible = "qcom,sc8280xp-crd", "qcom,sc8280xp";
> +
> +	aliases {
> +		serial0 = &qup2_uart17;
> +	};
> +
> +	backlight {
> +		compatible = "pwm-backlight";
> +		pwms = <&pmc8280c_lpg 3 1000000>;
> +		enable-gpios = <&pmc8280_1_gpios 8 GPIO_ACTIVE_HIGH>;
> +		power-supply = <&vreg_edp_bl>;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_bl_en>, <&edp_bl_pwm>;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +
> +	vreg_edp_bl: edp-bl-regulator {

The fixed regulator nodes should be renamed "regulator-edp-bl"...

> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "VREG_EDP_BL";
> +		regulator-min-microvolt = <3600000>;
> +		regulator-max-microvolt = <3600000>;
> +
> +		gpio = <&pmc8280_1_gpios 9 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_bl_reg_en>;
> +
> +		regulator-boot-on;
> +	};
> +
> +	vreg_misc_3p3: misc-3p3-regulator {

...and "regulator-misc-3p3" (e.g. so we have a common prefix to sort
by).

> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "VREG_MISC_3P3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +
> +		gpio = <&pmc8280_1_gpios 1 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&misc_3p3_reg_en>;
> +
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
> +
> +	reserved-memory {
> +	};
> +};

Johan