linux-kernel - Re: [PATCH v6 3/3] arm64: dts: qcom: sc8280xp-blackrock: dt definition for WDK2023

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Message-ID: <0bceeb9c-1604-408a-a465-e7ac4d05b3f3@oss.qualcomm.com>
Date: Thu, 31 Oct 2024 21:15:36 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: jens.glathe@...schoolsolutions.biz,
        Bjorn Andersson
 <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Kalle Valo <kvalo@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Merck Hung <merckhung@...il.com>
Subject: Re: [PATCH v6 3/3] arm64: dts: qcom: sc8280xp-blackrock: dt
 definition for WDK2023

On 30.10.2024 12:02 PM, Jens Glathe via B4 Relay wrote:
> From: Jens Glathe <jens.glathe@...schoolsolutions.biz>
> 
> Device tree for the Microsoft Windows Dev Kit 2023. This work
> is based on the initial work of Merck Hung <merckhung@...il.com>.
> 
> Original work: https://github.com/merckhung/linux_ms_dev_kit/blob/ms-dev-kit-2023-v6.3.0/arch/arm64/boot/dts/qcom/sc8280xp-microsoft-dev-kit-2023.dts
> 
> The Windows Dev Kit 2023 is a nice little desktop based on sc8280xp.
> Link: https://learn.microsoft.com/en-us/windows/arm/dev-kit/
> 
> Supported features:
> - USB type-c and type-a ports
> - minidp connector
> - built-in r8152 Ethernet adapter
> - PCIe devices
> - nvme
> - ath11k WiFi (WCN6855)
> - WCN6855 Bluetooth
> - A690 GPU
> - ADSP and CDSP
> - GPIO keys
> - Audio definition (works via USB)
> 
> Signed-off-by: Jens Glathe <jens.glathe@...schoolsolutions.biz>
> ---

[...]

> +	wcn6855-pmu {
> +		compatible = "qcom,wcn6855-pmu";
> +
> +		pinctrl-0 = <&bt_default>, <&wlan_en>;
> +		pinctrl-names = "default";
> +
> +		wlan-enable-gpios = <&tlmm 134 GPIO_ACTIVE_HIGH>;
> +		bt-enable-gpios = <&tlmm 133 GPIO_ACTIVE_HIGH>;
> +
> +		vddio-supply = <&vreg_s10b>;
> +		vddaon-supply = <&vreg_s12b>;
> +		vddpmu-supply = <&vreg_s12b>;
> +		vddrfa0p95-supply = <&vreg_s12b>;
> +		vddrfa1p3-supply = <&vreg_s11b>;
> +		vddrfa1p9-supply = <&vreg_s1c>;
> +		vddpcie1p3-supply = <&vreg_s11b>;
> +		vddpcie1p9-supply = <&vreg_s1c>;

Please update this atop

<20241018-sc8280xp-pwrseq-v6-0-8da8310d9564@...aro.org>

most notably including a new supply (which will likely be identical)

> +	compatible = "qcom,sc8280xp-sndcard";
> +	model = "microsoft/blackrock";
> +	audio-routing =

Please don't break the line, see e.g. x1e80100-crd.dts

> +		"SpkrLeft IN", "WSA_SPK1 OUT",
> +		"SpkrRight IN", "WSA_SPK2 OUT",

Oh, this thing has a speaker!

[...]

> +&pmc8280_1_gpios {
> +	edp_bl_en: edp-bl-en-state {
> +		pins = "gpio8";
> +		function = "normal";
> +	};
> +
> +	edp_bl_reg_en: edp-bl-reg-en-state {
> +		pins = "gpio9";
> +		function = "normal";
> +	};
> +
> +	misc_3p3_reg_en: misc-3p3-reg-en-state {
> +		pins = "gpio1";
> +		function = "normal";
> +	};

Sorting GPIOs by their number is preferred

https://docs.kernel.org/devicetree/bindings/dts-coding-style.html#order-of-nodes

[...]

> +&tlmm {
> +	gpio-reserved-ranges = <70 2>, <74 6>, <125 2>, <128 2>, <154 4>;

Do we know what these are for? If so, please describe it (also
like in x1e80100-crd.dts)

Konrad