ARM: dts: ixp4xx: Add devicetree for Linksys WRV54G

This adds a device tree for the Linksys WRV54G also known as
Gemtek GTWX5715. Some enhancements have been folded in from the
OpenWrt patches.

This supports everything in the upstream kernel with placeholders
for the out-of-tree multiphy which exist in OpenWrt.

Cc: phj@phj.hu
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/Makefile

@@ -241,6 +241,7 @@ dtb-$(CONFIG_ARCH_INTEGRATOR) += \
 	integratorcp.dtb
 dtb-$(CONFIG_ARCH_IXP4XX) += \
 	intel-ixp42x-linksys-nslu2.dtb \
+	intel-ixp42x-linksys-wrv54g.dtb \
 	intel-ixp42x-welltech-epbx100.dtb \
 	intel-ixp42x-ixdp425.dtb \
 	intel-ixp43x-kixrp435.dtb \

arch/arm/boot/dts/intel-ixp42x-linksys-wrv54g.dts

@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Device Tree file for the Linksys WRV54G router
+ * Also known as Gemtek GTWX5715
+ * Based on a board file by George T. Joseph and other patches.
+ * This machine is based on IXP425.
+ */
+
+/dts-v1/;
+
+#include "intel-ixp42x.dtsi"
+#include <dt-bindings/input/input.h>
+
+/ {
+	model = "Linksys WRV54G / Gemtek GTWX5715";
+	compatible = "linksys,wrv54g", "gemtek,gtwx5715", "intel,ixp42x";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	memory@0 {
+		/* 32 MB memory */
+		device_type = "memory";
+		reg = <0x00000000 0x2000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+		stdout-path = "uart1:115200n8";
+	};
+
+	aliases {
+		/* UART2 is the primary console */
+		serial0 = &uart1;
+		serial1 = &uart0;
+	};
+
+	/* There is an unpopulated LED slot (3) connected to GPIO 8 */
+	leds {
+		compatible = "gpio-leds";
+		led-power {
+			label = "wrv54g:yellow:power";
+			gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+			default-state = "on";
+			linux,default-trigger = "heartbeat";
+		};
+		led-wireless {
+			label = "wrv54g:yellow:wireless";
+			gpios = <&gpio0 9 GPIO_ACTIVE_LOW>;
+			default-state = "on";
+		};
+		led-internet {
+			label = "wrv54g:yellow:internet";
+			gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+			default-state = "on";
+		};
+		led-dmz {
+			label = "wrv54g:green:dmz";
+			gpios = <&gpio0 4 GPIO_ACTIVE_LOW>;
+			default-state = "on";
+		};
+	};
+
+	/* This set-up comes from an OpenWrt patch */
+	spi {
+		compatible = "spi-gpio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		sck-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
+		miso-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
+		mosi-gpios = <&gpio0 6 GPIO_ACTIVE_HIGH>;
+		cs-gpios = <&gpio0 5 GPIO_ACTIVE_LOW>;
+		num-chipselects = <1>;
+
+		switch@0 {
+			compatible = "micrel,ks8995";
+			reg = <0>;
+			spi-max-frequency = <50000000>;
+		};
+	};
+
+	soc {
+		bus@c4000000 {
+			flash@0,0 {
+				compatible = "intel,ixp4xx-flash", "cfi-flash";
+				bank-width = <2>;
+				/* Enable writes on the expansion bus */
+				intel,ixp4xx-eb-write-enable = <1>;
+				/* 8 MB of Flash mapped in at CS0 */
+				reg = <0 0x00000000 0x00800000>;
+
+				partitions {
+					compatible = "fixed-partitions";
+					/*
+					 * Partition info from a boot log
+					 * CHECKME: not using redboot? FIS index 0x3f @7e00000?
+					 */
+					#address-cells = <1>;
+					#size-cells = <1>;
+					partition@0 {
+						label = "boot";
+						reg = <0x0 0x140000>;
+						read-only;
+					};
+					partition@140000 {
+						label = "linux";
+						reg = <0x140000 0x100000>;
+						read-only;
+					};
+					partition@240000 {
+						label = "root";
+						reg = <0x240000 0x480000>;
+						read-write;
+					};
+				};
+			};
+		};
+
+		pci@c0000000 {
+			status = "ok";
+
+			/*
+			 * We have up to 2 slots (IDSEL) with 2 swizzled IRQs.
+			 * Derived from the GTWX5715 PCI boardfile.
+			 */
+			interrupt-map =
+			/* IDSEL 0 */
+			<0x0000 0 0 1 &gpio0 10 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 0 is irq 10 */
+			<0x0000 0 0 2 &gpio0 11 IRQ_TYPE_LEVEL_LOW>, /* INT B on slot 0 is irq 11 */
+			/* IDSEL 1 */
+			<0x0800 0 0 1 &gpio0 11 IRQ_TYPE_LEVEL_LOW>, /* INT A on slot 1 is irq 11 */
+			<0x0800 0 0 2 &gpio0 10 IRQ_TYPE_LEVEL_LOW>; /* INT B on slot 1 is irq 10 */
+		};
+
+		/*
+		 * EthB - connected to the KS8995 switch ports 1-4
+		 * FIXME: the boardfile defines .phy_mask = 0x1e for this port to enable output to
+		 * all four switch ports, also using an out of tree multiphy patch.
+		 * Do we need a new binding and property for this?
+		 */
+		ethernet@c8009000 {
+			status = "ok";
+			queue-rx = <&qmgr 3>;
+			queue-txready = <&qmgr 20>;
+			phy-mode = "rgmii";
+			phy-handle = <&phy4>;
+
+			mdio {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				/* Should be ports 1-4 on the KS8995 switch */
+				phy4: ethernet-phy@4 {
+					reg = <4>;
+				};
+
+				/* Should be port 5 on the KS8995 switch */
+				phy5: ethernet-phy@5 {
+					reg = <5>;
+				};
+			};
+		};
+
+		/* EthC - connected to KS8995 switch port 5 */
+		ethernet@c800a000 {
+			status = "ok";
+			queue-rx = <&qmgr 4>;
+			queue-txready = <&qmgr 21>;
+			phy-mode = "rgmii";
+			phy-handle = <&phy5>;
+		};
+	};
+};