linux-kernel - Re: [PATCH 2/4] arm64: dts: qcom: add sdm845-google-blueline (Pixel 3)

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Date:   Tue, 19 Jul 2022 10:45:19 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Caleb Connolly <caleb@...nolly.tech>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Cc:     Amit Pundir <amit.pundir@...aro.org>, Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH 2/4] arm64: dts: qcom: add sdm845-google-blueline (Pixel
 3)

On 18/07/2022 23:30, Caleb Connolly wrote:
> From: Amit Pundir <amit.pundir@...aro.org>
> 
> This adds an initial dts for the Blueline (Pixel 3). Supported
> functionality includes display, Debug UART, UFS, USB-C (peripheral), WiFi,
> Bluetooth and modem.
> 

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

(...)

> +	volume-keys {
> +		compatible = "gpio-keys";
> +		label = "Volume keys";
> +		autorepeat;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&volume_up_gpio>;
> +
> +		vol-up {

key-vol-up
(DT schema requires it now)

> +			label = "Volume Up";
> +			linux,code = <KEY_VOLUMEUP>;
> +			gpios = <&pm8998_gpio 6 GPIO_ACTIVE_LOW>;
> +			debounce-interval = <15>;
> +		};
> +	};
> +
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		mpss_region: memory@...00000 {
> +			reg = <0 0x8e000000 0 0x9800000>;
> +			no-map;
> +		};
> +
> +		venus_mem: venus@...00000 {
> +			reg = <0 0x97800000 0 0x500000>;
> +			no-map;
> +		};
> +
> +		cdsp_mem: cdsp-mem@...00000 {
> +			reg = <0 0x97D00000 0 0x800000>;
> +			no-map;
> +		};
> +
> +		mba_region: mba@...00000 {
> +			reg = <0 0x98500000 0 0x200000>;
> +			no-map;
> +		};
> +
> +		slpi_mem: slpi@...00000 {
> +			reg = <0 0x98700000 0 0x1400000>;
> +			no-map;
> +		};
> +
> +		spss_mem: spss@...00000 {
> +			reg = <0 0x99B00000 0 0x100000>;
> +			no-map;
> +		};
> +
> +		/* rmtfs lower guard */
> +		memory@...00000 {
> +			reg = <0 0xf2700000 0 0x1000>;
> +			no-map;
> +		};
> +
> +		rmtfs_mem: memory@...01000 {
> +			compatible = "qcom,rmtfs-mem";
> +			reg = <0 0xf2701000 0 0x200000>;
> +			no-map;
> +
> +			qcom,client-id = <1>;
> +			qcom,vmid = <15>;
> +		};
> +
> +		/* rmtfs upper guard */
> +		memory@...01000 {
> +			reg = <0 0xf2901000 0 0x1000>;
> +			no-map;
> +		};
> +	};
> +
> +	vph_pwr: vph-pwr-regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vph_pwr";
> +		regulator-min-microvolt = <3700000>;
> +		regulator-max-microvolt = <3700000>;
> +	};
> +
> +	vreg_s4a_1p8: vreg-s4a-1p8 {

Please use consistent naming, so if previous was "xxx-regulator", keep
similar pattern here.

> +		compatible = "regulator-fixed";
> +		regulator-name = "vreg_s4a_1p8";
> +
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +
> +		vin-supply = <&vph_pwr>;
> +	};
> +};
> +
> +&adsp_pas {

(...)

> +
> +&pm8998_gpio {
> +	volume_up_gpio: vol-up-active {

The bindings require node name to finish with "-state"

> +		pins = "gpio6";
> +		function = "normal";
> +		input-enable;
> +		bias-pull-up;
> +		qcom,drive-strength = <0>;
> +	};
> +
> +	panel_pmgpio_pins: panel-pmgpio-active {

Ditto.

> +		pins = "gpio2", "gpio5";
> +		function = "normal";
> +		input-enable;
> +		bias-disable;
> +		power-source = <0>;
> +	};
> +};
> +
> +&pm8998_pon {
> +	resin {
> +		compatible = "qcom,pm8941-resin";
> +		interrupts = <0x0 0x8 1 IRQ_TYPE_EDGE_BOTH>;
> +		debounce = <15625>;
> +		bias-pull-up;
> +		linux,code = <KEY_VOLUMEDOWN>;
> +	};
> +};
> +
Best regards,
Krzysztof