[PATCH] arm64: dts: rockchip: Add PCIe node on rk3399-roc-pc

[Markus Reichl <m.reichl@fivetechno.de>]

rk3399-roc-pc has a PCIe interface. Enable it for use with
the M.2 NGFF M_KEY slot on roc-rk3399-mezzanine board.
Tested with Samsung 970 evo plus SSD.

Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
---
 .../arm64/boot/dts/rockchip/rk3399-roc-pc.dts | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts
index 9313251765c7..2d637d54994b 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts
@@ -158,6 +158,21 @@
 		regulator-max-microvolt = <1400000>;
 		vin-supply = <&vcc_sys>;
 	};
+
+	/* on roc-rk3399-mezzanine board */
+	vcc3v3_pcie: vcc3v3-pcie {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc3v3_pcie";
+		enable-active-high;
+		gpio = <&gpio1 RK_PC1 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&vcc3v3_pcie_en>;
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&dc_12v>;
+	};
 };
 
 &cpu_l0 {
@@ -514,6 +529,19 @@
 	status = "okay";
 };
 
+&pcie_phy {
+	status = "okay";
+};
+
+&pcie0 {
+	ep-gpios = <&gpio4 RK_PD1 GPIO_ACTIVE_HIGH>;
+	num-lanes = <4>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie_perst>;
+	vpcie3v3-supply = <&vcc3v3_pcie>;
+	status = "okay";
+};
+
 &pinctrl {
 	lcd-panel {
 		lcd_panel_reset: lcd-panel-reset {
@@ -535,6 +563,16 @@
 		};
 	};
 
+	pcie {
+		vcc3v3_pcie_en: vcc3v3-pcie-en {
+			rockchip,pins = <1 RK_PC1 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		pcie_perst: pcie-perst {
+			rockchip,pins = <4 RK_PD1 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	pmic {
 		vsel1_gpio: vsel1-gpio {
 			rockchip,pins = <1 RK_PC2 RK_FUNC_GPIO &pcfg_pull_down>;
-- 
2.20.1