mips: dts: Add PCIe to EcoNet EN751221

Add PCIe based on EN7528 PCIe driver, also add two MT76 wifi devices
to SmartFiber XP8421-B.

Signed-off-by: Caleb James DeLisle <cjd@cjdns.fr>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/boot/dts/econet/en751221.dtsi

@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 /dts-v1/;
 
+#include <dt-bindings/clock/econet,en751221-scu.h>
+
 / {
 	compatible = "econet,en751221";
 	#address-cells = <1>;
@@ -30,6 +32,30 @@
 		#interrupt-cells = <1>;
 	};
 
+	chip_scu: syscon@1fa20000 {
+		compatible = "econet,en751221-chip-scu", "syscon";
+		reg = <0x1fa20000 0x388>;
+	};
+
+	pcie_phy1: pcie-phy@1fac0000 {
+		compatible = "econet,en751221-pcie-gen2";
+		reg = <0x1fac0000 0x1000>;
+		#phy-cells = <0>;
+	};
+
+	pcie_phy0: pcie-phy@1faf2000 {
+		compatible = "econet,en751221-pcie-gen1";
+		reg = <0x1faf2000 0x1000>;
+		#phy-cells = <0>;
+	};
+
+	scuclk: clock-controller@1fb00000 {
+		compatible = "econet,en751221-scu";
+		reg = <0x1fb00000 0x970>;
+		#clock-cells = <1>;
+		#reset-cells = <1>;
+	};
+
 	intc: interrupt-controller@1fb40000 {
 		compatible = "econet,en751221-intc";
 		reg = <0x1fb40000 0x100>;
@@ -41,6 +67,94 @@
 		econet,shadow-interrupts = <7 2>, <8 3>, <13 12>, <30 29>;
 	};
 
+	pciecfg: pciecfg@1fb80000 {
+		compatible = "mediatek,generic-pciecfg", "syscon";
+		reg = <0x1fb80000 0x1000>;
+	};
+
+	pcie0: pcie@1fb81000 {
+		compatible = "econet,en7528-pcie";
+		device_type = "pci";
+		reg = <0x1fb81000 0x1000>;
+		reg-names = "port0";
+		linux,pci-domain = <0>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		interrupt-parent = <&intc>;
+		interrupts = <23>;
+		interrupt-names = "pcie_irq";
+		clocks = <&scuclk EN751221_CLK_PCIE>;
+		clock-names = "sys_ck0";
+		phys = <&pcie_phy0>;
+		phy-names = "pcie-phy0";
+		bus-range = <0x00 0xff>;
+		ranges = <0x01000000 0 0x00000000 0x1f600000 0 0x00008000>,
+			 <0x82000000 0 0x20000000 0x20000000 0 0x08000000>;
+		status = "disabled";
+
+		#interrupt-cells = <1>;
+		interrupt-map-mask = <0 0 0 7>;
+		interrupt-map = <0 0 0 1 &pcie_intc0 0>,
+				<0 0 0 2 &pcie_intc0 1>,
+				<0 0 0 3 &pcie_intc0 2>,
+				<0 0 0 4 &pcie_intc0 3>;
+
+		pcie_intc0: interrupt-controller {
+			interrupt-controller;
+			#address-cells = <0>;
+			#interrupt-cells = <1>;
+		};
+
+		slot0: pcie@0,0 {
+			reg = <0x0000 0 0 0 0>;
+			device_type = "pci";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			ranges;
+		};
+	};
+
+	pcie1: pcie@1fb83000 {
+		compatible = "econet,en7528-pcie";
+		device_type = "pci";
+		reg = <0x1fb83000 0x1000>;
+		reg-names = "port1";
+		linux,pci-domain = <1>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		interrupt-parent = <&intc>;
+		interrupts = <24>;
+		interrupt-names = "pcie_irq";
+		clocks = <&scuclk EN751221_CLK_PCIE>;
+		clock-names = "sys_ck1";
+		phys = <&pcie_phy1>;
+		phy-names = "pcie-phy1";
+		bus-range = <0x00 0xff>;
+		ranges = <0x81000000 0 0x00000000 0x1f608000 0 0x00008000>,
+			 <0x82000000 0 0x28000000 0x28000000 0 0x08000000>;
+		status = "disabled";
+
+		#interrupt-cells = <1>;
+		interrupt-map-mask = <0 0 0 7>;
+		interrupt-map = <0 0 0 1 &pcie_intc1 0>,
+				<0 0 0 2 &pcie_intc1 1>,
+				<0 0 0 3 &pcie_intc1 2>,
+				<0 0 0 4 &pcie_intc1 3>;
+
+		pcie_intc1: interrupt-controller {
+			interrupt-controller;
+			#address-cells = <0>;
+			#interrupt-cells = <1>;
+		};
+
+		slot1: pcie@1,0 {
+			reg = <0x0800 0 0 0 0>;
+			#address-cells = <3>;
+			#size-cells = <2>;
+			ranges;
+		};
+	};
+
 	uart: serial@1fbf0000 {
 		compatible = "ns16550";
 		reg = <0x1fbf0000 0x30>;

arch/mips/boot/dts/econet/en751221_smartfiber_xp8421-b.dts

@@ -17,3 +17,24 @@
 		linux,usable-memory-range = <0x00020000 0x1bfe0000>;
 	};
 };
+
+&pcie0 {
+	status = "okay";
+};
+&slot0 {
+	wifi@0,0 {
+		/* MT7612E */
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+	};
+};
+&pcie1 {
+	status = "okay";
+};
+&slot1 {
+	wifi@0,0 {
+		/* MT7592 */
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+	};
+};

arch/mips/econet/Kconfig

@@ -13,7 +13,9 @@ choice
 		bool "EN751221 family"
 		select COMMON_CLK
 		select ECONET_EN751221_INTC
+		select HAVE_PCI
 		select IRQ_MIPS_CPU
+		select PCI_DRIVERS_GENERIC
 		select SMP
 		select SMP_UP
 		select SYS_SUPPORTS_SMP