[PATCH v2 4/4] arm64: dts: qcom: Add PCIe 3 regulators for HAMOA-IOT-EVK board

[Ziyue Zhang]

HAMOA-IOT-EVK board includes a PCIe3 controller and x8 slot that require
proper power rail and control signal configuration. This update adds
`vddpe-3v3-supply` and `regulator-pcie-12v` to provide 3.3V to the PHY
and 12V to the slot for external devices.

It also introduces PM GPIOs to manage power enable and reset signals,
ensuring stable power sequencing and reliable PCIe3 operation.

Signed-off-by: Ziyue Zhang <ziyue.zhang at oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 79 ++++++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
index 24c2dcef0ba8..0984a6eed226 100644
--- a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
+++ b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
@@ -414,6 +414,48 @@ vreg_wwan: regulator-wwan {
 		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 = <&pcie_x8_12v>;
+		pinctrl-names = "default";
+	};
+
+	vreg_pcie_3v3_aux: regulator-pcie-3v3-aux {
+		compatible = "regulator-fixed";
+
+		regulator-name = "VREG_PCIE_3P3_AUX";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&pmc8380_3_gpios 8 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&pm_sde7_aux_3p3_en>;
+		pinctrl-names = "default";
+	};
+
+	vreg_pcie_3v3: regulator-pcie-3v3 {
+		compatible = "regulator-fixed";
+
+		regulator-name = "VREG_PCIE_3P3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&pmc8380_3_gpios 6 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&pm_sde7_main_3p3_en>;
+		pinctrl-names = "default";
+};
+
 	sound {
 		compatible = "qcom,x1e80100-sndcard";
 		model = "X1E80100-EVK";
@@ -844,6 +886,12 @@ &mdss_dp3_phy {
 	status = "okay";
 };
 
+&pcie3_port {
+	vpcie12v-supply = <&vreg_pcie_12v>;
+	vpcie3v3-supply = <&vreg_pcie_3v3>;
+	vpcie3v3aux-supply = <&vreg_pcie_3v3_aux>;
+};
+
 &pcie5 {
 	vddpe-3v3-supply = <&vreg_wwan>;
 };
@@ -872,6 +920,17 @@ usb0_3p3_reg_en: usb0-3p3-reg-en-state {
 	};
 };
 
+&pm8550ve_8_gpios {
+	pcie_x8_12v: pcie-12v-default-state {
+		pins = "gpio8";
+		function = "normal";
+		output-enable;
+		output-high;
+		bias-pull-down;
+		power-source = <0>;
+	};
+};
+
 &pm8550ve_9_gpios {
 	usb0_1p8_reg_en: usb0-1p8-reg-en-state {
 		pins = "gpio8";
@@ -883,6 +942,26 @@ usb0_1p8_reg_en: usb0-1p8-reg-en-state {
 	};
 };
 
+&pmc8380_3_gpios {
+	pm_sde7_aux_3p3_en: pcie-aux-3p3-default-state {
+		pins = "gpio8";
+		function = "normal";
+		output-enable;
+		output-high;
+		bias-pull-down;
+		power-source = <0>;
+	};
+
+	pm_sde7_main_3p3_en: pcie-main-3p3-default-state {
+		pins = "gpio6";
+		function = "normal";
+		output-enable;
+		output-high;
+		bias-pull-down;
+		power-source = <0>;
+	};
+};
+
 &pmc8380_5_gpios {
 	usb0_pwr_1p15_reg_en: usb0-pwr-1p15-reg-en-state {
 		pins = "gpio8";
-- 
2.34.1