linux-kernel - Re: [PATCH v2 2/3] arm64: dts: qcom: sm8650: add support for the SM8650-HDK board

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Date: Mon, 18 Mar 2024 16:30:23 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>
Cc: Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>
Subject: Re: [PATCH v2 2/3] arm64: dts: qcom: sm8650: add support for the
 SM8650-HDK board

On 18/03/2024 15:43, Bjorn Andersson wrote:
> On Mon, Mar 18, 2024 at 10:51:54AM +0100, Neil Armstrong wrote:
> [..]
>> diff --git a/arch/arm64/boot/dts/qcom/sm8650-hdk.dts b/arch/arm64/boot/dts/qcom/sm8650-hdk.dts
> [..]
>> +	vph_pwr: vph-pwr-regulator {
>> +		compatible = "regulator-fixed";
>> +
>> +		regulator-name = "vph_pwr";
>> +		regulator-min-microvolt = <3700000>;
>> +		regulator-max-microvolt = <3700000>;
>> +
>> +		regulator-always-on;
>> +		regulator-boot-on;
>> +	};
>> +
>> +	vreg_bob_3v3: regulator-vreg-bob-3v3 {
> 
> It would be nice if these nodes where sorted alphabetically.

damn, ok

> 
>> +		compatible = "regulator-fixed";
>> +
>> +		regulator-name = "VREG_BOB_3P3";
>> +		regulator-min-microvolt = <3300000>;
>> +		regulator-max-microvolt = <3300000>;
>> +
>> +		vin-supply = <&vph_pwr>;
>> +	};
>> +
>> +	wcd939x: audio-codec {
>> +		compatible = "qcom,wcd9395-codec", "qcom,wcd9390-codec";
>> +
>> +		pinctrl-0 = <&wcd_default>;
>> +		pinctrl-names = "default";
>> +
>> +		qcom,micbias1-microvolt = <1800000>;
>> +		qcom,micbias2-microvolt = <1800000>;
>> +		qcom,micbias3-microvolt = <1800000>;
>> +		qcom,micbias4-microvolt = <1800000>;
>> +		qcom,mbhc-buttons-vthreshold-microvolt = <75000 150000 237000 500000 500000 500000 500000 500000>;
>> +		qcom,mbhc-headset-vthreshold-microvolt = <1700000>;
>> +		qcom,mbhc-headphone-vthreshold-microvolt = <50000>;
>> +		qcom,rx-device = <&wcd_rx>;
>> +		qcom,tx-device = <&wcd_tx>;
>> +
>> +		reset-gpios = <&tlmm 107 GPIO_ACTIVE_LOW>;
>> +
>> +		vdd-buck-supply = <&vreg_l15b_1p8>;
>> +		vdd-rxtx-supply = <&vreg_l15b_1p8>;
>> +		vdd-io-supply = <&vreg_l15b_1p8>;
>> +		vdd-mic-bias-supply = <&vreg_bob1>;
>> +
>> +		#sound-dai-cells = <1>;
>> +	};
>> +};
> [..]
>> +&mdss_mdp {
>> +	status = "okay";
> 
> On other platforms we left status = okay on the mdp child node, as it's
> pretty rare that you want mdss okay, but mdp disabled...

Sure, but this is quite unrelated to HDK

> 
>> +};
>> +
>> +&pcie0 {
>> +	wake-gpios = <&tlmm 96 GPIO_ACTIVE_HIGH>;
>> +	perst-gpios = <&tlmm 94 GPIO_ACTIVE_LOW>;
>> +
>> +	pinctrl-0 = <&pcie0_default_state>;
>> +	pinctrl-names = "default";
>> +
>> +	status = "okay";
>> +};
>> +
>> +&pcie0_phy {
>> +	vdda-phy-supply = <&vreg_l1i_0p88>;
>> +	vdda-pll-supply = <&vreg_l3i_1p2>;
>> +
>> +	status = "okay";
>> +};
>> +
>> +&pcie1 {
>> +	wake-gpios = <&tlmm 99 GPIO_ACTIVE_HIGH>;
>> +	perst-gpios = <&tlmm 97 GPIO_ACTIVE_LOW>;
>> +
>> +	pinctrl-0 = <&pcie1_default_state>;
>> +	pinctrl-names = "default";
>> +
>> +	status = "okay";
>> +};
>> +
>> +&pcie1_phy {
>> +	vdda-phy-supply = <&vreg_l3e_0p9>;
>> +	vdda-pll-supply = <&vreg_l3i_1p2>;
>> +	vdda-qref-supply = <&vreg_l1i_0p88>;
>> +
>> +	status = "okay";
>> +};
>> +
>> +&pcie_1_phy_aux_clk {
>> +	clock-frequency = <1000>;
> 
> Is that so?

This is how the pcie_1_phy_aux_clk was documented on SM8550 and SM8650
and downstream uses the same clock-frequency.

Neil
> 
>> +};
>> +
> 
> Regards,
> Bjorn