arm64: dts: mt7986: add pcie related device nodes

This patch adds PCIe support for MT7986.

Signed-off-by: Jieyy Yang <jieyy.yang@mediatek.com>
Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230106152845.88717-5-linux@fw-web.de
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt7986a-rfb.dts

@@ -93,6 +93,15 @@
 	non-removable;
 	no-sd;
 	no-sdio;
+};
+
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie_pins>;
+	status = "okay";
+};
+
+&pcie_phy {
 	status = "okay";
 };
 
@@ -155,6 +164,13 @@
 		};
 	};
 
+	pcie_pins: pcie-pins {
+		mux {
+			function = "pcie";
+			groups = "pcie_clk", "pcie_wake", "pcie_pereset";
+		};
+	};
+
 	spi_flash_pins: spi-flash-pins {
 		mux {
 			function = "spi";

arch/arm64/boot/dts/mediatek/mt7986a.dtsi

@@ -8,6 +8,7 @@
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/clock/mt7986-clk.h>
 #include <dt-bindings/reset/mt7986-resets.h>
+#include <dt-bindings/phy/phy.h>
 
 / {
 	compatible = "mediatek,mt7986a";
@@ -361,6 +362,57 @@
 			status = "disabled";
 		};
 
+		pcie: pcie@11280000 {
+			compatible = "mediatek,mt7986-pcie",
+				     "mediatek,mt8192-pcie";
+			device_type = "pci";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			reg = <0x00 0x11280000 0x00 0x4000>;
+			reg-names = "pcie-mac";
+			interrupts = <GIC_SPI 168 IRQ_TYPE_LEVEL_HIGH>;
+			bus-range = <0x00 0xff>;
+			ranges = <0x82000000 0x00 0x20000000 0x00
+				  0x20000000 0x00 0x10000000>;
+			clocks = <&infracfg CLK_INFRA_IPCIE_PIPE_CK>,
+				 <&infracfg CLK_INFRA_IPCIE_CK>,
+				 <&infracfg CLK_INFRA_IPCIER_CK>,
+				 <&infracfg CLK_INFRA_IPCIEB_CK>;
+			clock-names = "pl_250m", "tl_26m", "peri_26m", "top_133m";
+			status = "disabled";
+
+			phys = <&pcie_port PHY_TYPE_PCIE>;
+			phy-names = "pcie-phy";
+
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 0x7>;
+			interrupt-map = <0 0 0 1 &pcie_intc 0>,
+					<0 0 0 2 &pcie_intc 1>,
+					<0 0 0 3 &pcie_intc 2>,
+					<0 0 0 4 &pcie_intc 3>;
+			pcie_intc: interrupt-controller {
+				#address-cells = <0>;
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+
+		pcie_phy: t-phy@11c00000 {
+			compatible = "mediatek,mt7986-tphy",
+				     "mediatek,generic-tphy-v2";
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges;
+			status = "disabled";
+
+			pcie_port: pcie-phy@11c00000 {
+				reg = <0 0x11c00000 0 0x20000>;
+				clocks = <&clk40m>;
+				clock-names = "ref";
+				#phy-cells = <1>;
+			};
+		};
+
 		usb_phy: t-phy@11e10000 {
 			compatible = "mediatek,mt7986-tphy",
 				     "mediatek,generic-tphy-v2";