arm64: dts: verdin-imx8mp: add pcie support

Add PCIe support on the Verdin iMX8M Plus.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi

@@ -67,7 +67,14 @@ &i2c4 {
 	/* TODO: Audio Codec */
 };
 
-/* TODO: Verdin PCIE_1 */
+/* Verdin PCIE_1 */
+&pcie {
+	status = "okay";
+};
+
+&pcie_phy {
+	status = "okay";
+};
 
 /* Verdin PWM_1 */
 &pwm1 {

arch/arm64/boot/dts/freescale/imx8mp-verdin-dev.dtsi

@@ -91,7 +91,14 @@ &i2c4 {
 	/* TODO: Audio Codec */
 };
 
-/* TODO: Verdin PCIE_1 */
+/* Verdin PCIE_1 */
+&pcie {
+	status = "okay";
+};
+
+&pcie_phy {
+	status = "okay";
+};
 
 /* Verdin PWM_1 */
 &pwm1 {

arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi

@@ -748,7 +748,20 @@ eeprom_carrier_board: eeprom@57 {
 	};
 };
 
-/* TODO: Verdin PCIE_1 */
+/* Verdin PCIE_1 */
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pcie>;
+	/* PCIE_1_RESET# (SODIMM 244) */
+	reset-gpio = <&gpio4 19 GPIO_ACTIVE_LOW>;
+};
+
+&pcie_phy {
+	clocks = <&hsio_blk_ctrl>;
+	clock-names = "ref";
+	fsl,clkreq-unsupported;
+	fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_OUTPUT>;
+};
 
 /* Verdin PWM_1 */
 &pwm1 {