linux-kernel - Re: [PATCH v4 1/3] arm64: dts: qcom: sc8280xp-crd: model the PMU of the on-board wcn6855

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Message-ID: <Zv50l7U_Rq91I1Dw@hovoldconsulting.com>
Date: Thu, 3 Oct 2024 12:40:23 +0200
From: Johan Hovold <johan@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: 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>,
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v4 1/3] arm64: dts: qcom: sc8280xp-crd: model the PMU of
 the on-board wcn6855

On Mon, Sep 30, 2024 at 12:30:37PM +0200, Bartosz Golaszewski wrote:
> From: Konrad Dybcio <konradybcio@...nel.org>
> 
> Add nodes for the WCN6855 PMU, the WLAN module and relevant regulators
> and pin functions to fully describe how the wifi is actually wired on
> this platform.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Konrad Dybcio <konradybcio@...nel.org>
> [Bartosz:
>   - write the commit message,
>   - rebase Konrad's commit,
>   - fix one of the supplies' name]
> Co-developed-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

First, make sure to CC people that help review your patches.

> ---
>  arch/arm64/boot/dts/qcom/sc8280xp-crd.dts | 110 ++++++++++++++++++++++
>  1 file changed, 110 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> index 6020582b0a59..28721570c59f 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> @@ -177,6 +177,17 @@ vreg_misc_3p3: regulator-misc-3p3 {
>  		regulator-always-on;
>  	};
>  
> +	vreg_s10b: regulator-s10b {
> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "VREG_S10B";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};

Again, this is not a fixed regulator. It's an supply from one of the
PMICs that are already described in DT.

> +
>  	vreg_wlan: regulator-wlan {
>  		compatible = "regulator-fixed";
  
> +&pcie4_port0 {
> +	wifi@0 {
> +		compatible = "pci17cb,1103";
> +		reg = <0x10000 0x0 0x0 0x0 0x0>;
> +
> +		vddrfacmn-supply = <&vreg_pmu_rfa_cmn_0p8>;
> +		vddaon-supply = <&vreg_pmu_aon_0p8>;
> +		vddwlcx-supply = <&vreg_pmu_wlcx_0p8>;
> +		vddwlmx-supply = <&vreg_pmu_wlmx_0p8>;
> +		vddpcie1p8-supply = <&vreg_pmu_pcie_1p8>;
> +		vddpcie0p9-supply = <&vreg_pmu_pcie_0p9>;
> +		vddrfa0p8-supply = <&vreg_pmu_rfa_0p8>;
> +		vddrfa1p2-supply = <&vreg_pmu_rfa_1p2>;
> +		vddrfa1p8-supply = <&vreg_pmu_rfa_1p7>;
> +
> +		qcom,ath11k-calibration-variant = "QC_8280XP_CRD";

Not "SC8280XP"?

> +	};
> +};
> +
>  &pmc8280c_lpg {
>  	status = "okay";
>  };
> @@ -829,6 +933,12 @@ reset-pins {
>  		};
>  	};
>  
> +	wlan_en: wlan-en-state {
> +		pins = "gpio134";
> +		function = "gpio";
> +		bias-pull-down;

We don't want a pull-down enabled on an active high enable signal.

> +	};

Please keep the nodes sorted by name.

> +
>  	nvme_reg_en: nvme-reg-en-state {
>  		pins = "gpio135";
>  		function = "gpio";

Johan