arm64: dts: imx8mp: Add PCIe support to DH electronics i.MX8M Plus DHCOM and PDK2

Add PCIe support for DH electronics i.MX8M Plus DHCOM SoM on PDK2 carrier board.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk2.dts b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk2.dts
index 382fbed..fdf18b7 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk2.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk2.dts
@@ -151,6 +151,20 @@
        status = "okay";
 };
 
+&pcie_phy {
+       clock-names = "ref";
+       clocks = <&clk IMX8MP_SYS_PLL2_100M>;
+       fsl,clkreq-unsupported;
+       fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_UNUSED>;
+       status = "okay";
+};
+
+&pcie {
+       fsl,max-link-speed = <1>;
+       reset-gpio = <&gpio1 6 GPIO_ACTIVE_LOW>;        /* GPIO J */
+       status = "okay";
+};
+
 &usb3_1 {
        fsl,over-current-active-low;
 };