linux-kernel - [PATCH 1/2] arm64: dts: qcom: x1e80100-romulus: Describe PCIe power supplies

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Message-Id: <20250812-topic-romulus_wifi_pci-v1-1-2adbed1b1f1d@oss.qualcomm.com>
Date: Tue, 12 Aug 2025 15:47:23 +0200
From: Konrad Dybcio <konradybcio@...nel.org>
To: 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>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH 1/2] arm64: dts: qcom: x1e80100-romulus: Describe PCIe
 power supplies

From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Describe the power plumbing to allow fully suspending the slot and the
connected SD controller.

Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
 .../boot/dts/qcom/x1e80100-microsoft-romulus.dtsi  | 71 ++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
index 0fd8516580b2679ee425438cb73fd4078cb20581..3a4df8f8066ae699eb7d889530f976fce565757e 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
@@ -331,6 +331,54 @@ vph_pwr: regulator-vph-pwr {
 		regulator-boot-on;
 	};
 
+	vreg_pcie_12v: regulator-pcie-12v {
+		compatible = "regulator-fixed";
+
+		regulator-name = "vreg_pcie_12v";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+
+		gpio = <&pm8550ve_8_gpios 8 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&vreg_12v_x8_en>;
+		pinctrl-names = "default";
+
+		regulator-boot-on;
+	};
+
+	vreg_pcie_3v3_aux: regulator-pcie-3v3-aux {
+		compatible = "regulator-fixed";
+
+		regulator-name = "vreg_pcie_3v3_aux";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&pmc8380_3_gpios 8 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&sde7_aux_reg_en>;
+		pinctrl-names = "default";
+
+		regulator-boot-on;
+	};
+
+	vreg_pcie_3v3_main: regulator-pcie-3v3-main {
+		compatible = "regulator-fixed";
+
+		regulator-name = "vreg_pcie_3v3_main";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&pmc8380_3_gpios 6 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&sde7_main_reg_en>;
+		pinctrl-names = "default";
+
+		regulator-boot-on;
+	};
+
 	sound {
 		compatible = "qcom,x1e80100-sndcard";
 		model = "X1E80100-Romulus";
@@ -1022,6 +1070,12 @@ &pcie3_phy {
 	status = "okay";
 };
 
+&pcie3_port {
+	vpcie12v-supply = <&vreg_pcie_12v>;
+	vpcie3v3-supply = <&vreg_pcie_3v3_main>;
+	vpcie3v3aux-supply = <&vreg_pcie_3v3_aux>;
+};
+
 &pcie4 {
 	status = "okay";
 };
@@ -1066,6 +1120,13 @@ rtmr0_3p3_reg_en: rtmr0-3p3-reg-en-state {
 	};
 };
 
+&pm8550ve_8_gpios {
+	vreg_12v_x8_en: 12v-x8-reg-en-state {
+		pins = "gpio8";
+		function = "normal";
+	};
+};
+
 &pm8550ve_9_gpios {
 	rtmr0_1p8_reg_en: rtmr0-1p8-reg-en-state {
 		pins = "gpio8";
@@ -1082,6 +1143,16 @@ edp_bl_en: edp-bl-en-state {
 		input-disable;
 		output-enable;
 	};
+
+	sde7_main_reg_en: sde7-main-reg-en-state {
+		pins = "gpio6";
+		function = "normal";
+	};
+
+	sde7_aux_reg_en: sde7-aux-reg-en-state {
+		pins = "gpio8";
+		function = "normal";
+	};
 };
 
 &pmc8380_5_gpios {

-- 
2.50.1