airoha: Introduce EN7581 SoC support

Introduce EN7581 SoC support with currently rfb board supported.

This is a new 64bit SoC from Airoha that is currently almost fully
supported upstream with only the DTS missing. Setting source-only
waiting for the full upstream support to be completed.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

target/linux/airoha/Makefile

@@ -3,8 +3,8 @@ include $(TOPDIR)/rules.mk
 ARCH:=arm
 BOARD:=airoha
 BOARDNAME:=Airoha ARM
-SUBTARGETS:=en7523
-FEATURES:=dt squashfs nand ramdisk gpio source-only
+SUBTARGETS:=en7523 en7581
+FEATURES:=dt squashfs nand ramdisk gpio
 
 KERNEL_PATCHVER:=6.6
 

target/linux/airoha/dts/en7581-evb-emmc.dts

@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/dts-v1/;
+
+/* Bootloader installs ATF here */
+/memreserve/ 0x80000000 0x200000;
+
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/gpio/gpio.h>
+#include "en7581.dtsi"
+
+/ {
+	model = "Airoha EN7581 Evaluation Board";
+	compatible = "airoha,en7581-evb", "airoha,en7581";
+
+	aliases {
+		serial0 = &uart1;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200 earlycon";
+		stdout-path = "serial0:115200n8";
+		linux,usable-memory-range = <0x0 0x80200000 0x0 0x1fe00000>;
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x2 0x00000000>;
+	};
+};
+
+&en7581_pinctrl {
+	gpio-ranges = <&en7581_pinctrl 0 13 47>;
+
+	mdio_pins: mdio-pins {
+		mux {
+			function = "mdio";
+			groups = "mdio";
+		};
+
+		conf {
+			pins = "gpio2";
+			output-high;
+		};
+	};
+
+	pcie0_rst_pins: pcie0-rst-pins {
+		conf {
+			pins = "pcie_reset0";
+			drive-open-drain = <1>;
+		};
+	};
+
+	pcie1_rst_pins: pcie1-rst-pins {
+		conf {
+			pins = "pcie_reset1";
+			drive-open-drain = <1>;
+		};
+	};
+
+	gswp1_led0_pins: gswp1-led0-pins {
+		mux {
+			function = "phy1_led0";
+			pins = "gpio33";
+		};
+	};
+
+	gswp2_led0_pins: gswp2-led0-pins {
+		mux {
+			function = "phy2_led0";
+			pins = "gpio34";
+		};
+	};
+
+	gswp3_led0_pins: gswp3-led0-pins {
+		mux {
+			function = "phy3_led0";
+			pins = "gpio35";
+		};
+	};
+
+	gswp4_led0_pins: gswp4-led0-pins {
+		mux {
+			function = "phy4_led0";
+			pins = "gpio42";
+		};
+	};
+
+	pwm_gpio18_idx10_pins: pwm-gpio18-idx10-pins {
+		function = "pwm";
+		pins = "gpio18";
+		output-enable;
+	};
+
+	mmc_pins: mmc-pins {
+		mux {
+			function = "emmc";
+			groups = "emmc";
+		};
+	};
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc_pins>;
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	card@0 {
+		compatible = "mmc-card";
+		reg = <0>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			bootloader@0 {
+				label = "bootloader";
+				reg = <0x00000000 0x00080000>;
+			};
+
+			tclinux@80000 {
+				label = "tclinux";
+				reg = <0x00080000 0x02800000>;
+			};
+
+			tclinux_slave@2880000 {
+				label = "tclinux_slave";
+				reg = <0x02880000 0x02800000>;
+			};
+
+			rootfs_data@5080000 {
+				label = "rootfs_data";
+				reg = <0x5080000 0x00800000>;
+			};
+		};
+	};
+};
+
+&i2c0 {
+	status = "okay";
+};
+
+&pcie0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie0_rst_pins>;
+	status = "okay";
+};
+
+&pcie1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie1_rst_pins>;
+	status = "okay";
+};
+
+&eth {
+	status = "okay";
+};
+
+&gdm1 {
+	status = "okay";
+};
+
+&switch {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mdio_pins>;
+	status = "okay";
+};
+
+&gsw_phy1 {
+	pinctrl-names = "led";
+	pinctrl-0 = <&gswp1_led0_pins>;
+	status = "okay";
+};
+
+&gsw_phy1_led0 {
+	status = "okay";
+};
+
+&gsw_phy2 {
+	pinctrl-names = "led";
+	pinctrl-0 = <&gswp2_led0_pins>;
+	status = "okay";
+};
+
+&gsw_phy2_led0 {
+	status = "okay";
+};
+
+&gsw_phy3 {
+	pinctrl-names = "led";
+	pinctrl-0 = <&gswp3_led0_pins>;
+	status = "okay";
+};
+
+&gsw_phy3_led0 {
+	status = "okay";
+};
+
+&gsw_phy4 {
+	pinctrl-names = "led";
+	pinctrl-0 = <&gswp4_led0_pins>;
+	status = "okay";
+};
+
+&gsw_phy4_led0 {
+	status = "okay";
+};