arm64: dts: rockchip: Add PCIe for RockPI N10

This patch adds support to enable PCIe for RockPI N10.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Link: https://lore.kernel.org/r/20200720110230.367985-3-jagan@amarulasolutions.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399pro-vmarc-som.dtsi

@@ -11,6 +11,18 @@
 
 / {
 	compatible = "vamrs,rk3399pro-vmarc-som", "rockchip,rk3399pro";
+
+	vcc3v3_pcie: vcc-pcie-regulator {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpio = <&gpio4 RK_PD4 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pcie_pwr>;
+		regulator-name = "vcc3v3_pcie";
+		regulator-always-on;
+		regulator-boot-on;
+		vin-supply = <&vcc5v0_sys>;
+	};
 };
 
 &cpu_l0 {
@@ -142,7 +154,8 @@ vcca_0v9: LDO_REG1 {
 				regulator-min-microvolt = <900000>;
 				regulator-max-microvolt = <900000>;
 				regulator-state-mem {
-					regulator-off-in-suspend;
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <900000>;
 				};
 			};
 
@@ -177,7 +190,8 @@ vcca_1v8: LDO_REG4 {
 				regulator-min-microvolt = <1850000>;
 				regulator-max-microvolt = <1850000>;
 				regulator-state-mem {
-					regulator-off-in-suspend;
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1850000>;
 				};
 			};
 
@@ -304,6 +318,22 @@ &io_domains {
 	sdmmc-supply = <&vccio_sd>;
 };
 
+&pcie_phy {
+	status = "okay";
+};
+
+&pcie0 {
+	ep-gpios = <&gpio0 RK_PB4 GPIO_ACTIVE_HIGH>;
+	max-link-speed = <2>;
+	num-lanes = <4>;
+	pinctrl-0 = <&pcie_clkreqnb_cpm>;
+	pinctrl-names = "default";
+	vpcie0v9-supply = <&vcca_0v9>;	/* VCC_0V9_S0 */
+	vpcie1v8-supply = <&vcca_1v8>;	/* VCC_1V8_S0 */
+	vpcie3v3-supply = <&vcc3v3_pcie>;
+	status = "okay";
+};
+
 &pinctrl {
 	hym8563 {
 		hym8563_int: hym8563-int {
@@ -311,6 +341,12 @@ hym8563_int: hym8563-int {
 		};
 	};
 
+	pcie {
+		pcie_pwr: pcie-pwr {
+			rockchip,pins =	<4 RK_PD4 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+
 	pmic {
 		pmic_int_l: pmic-int-l {
 			rockchip,pins = <1 RK_PC2 0 &pcfg_pull_up>;