ARM: dts: Add some initial IXP4xx device trees

This adds a device tree for the IXP4xx-based Linksys
NSLU2 and Gateworks GW2358 which encompass the Gateworks
Cambria family.

These will be the first IXP4xx device tree platforms.

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

7 files changed, 338 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index f4f5aeaf3298..7af4e3289a89 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -229,6 +229,9 @@ dtb-$(CONFIG_ARCH_HIX5HD2) += \
 dtb-$(CONFIG_ARCH_INTEGRATOR) += \
 	integratorap.dtb \
 	integratorcp.dtb
+dtb-$(CONFIG_ARCH_IXP4XX) += \
+	intel-ixp42x-linksys-nslu2.dtb \
+	intel-ixp43x-gateworks-gw2358.dtb
 dtb-$(CONFIG_ARCH_KEYSTONE) += \
 	keystone-k2hk-evm.dtb \
 	keystone-k2l-evm.dtb \
diff --git a/arch/arm/boot/dts/intel-ixp42x-linksys-nslu2.dts b/arch/arm/boot/dts/intel-ixp42x-linksys-nslu2.dts
new file mode 100644
index 000000000000..8fcd95805ff4
--- /dev/null
+++ b/arch/arm/boot/dts/intel-ixp42x-linksys-nslu2.dts
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Device Tree file for Linksys NSLU2
+ */
+
+/dts-v1/;
+
+#include "intel-ixp42x.dtsi"
+#include <dt-bindings/input/input.h>
+
+/ {
+	model = "Linksys NSLU2 (Network Storage Link for USB 2.0 Disk Drives)";
+	compatible = "linksys,nslu2", "intel,ixp42x";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	memory@0 {
+		/* 32 MB SDRAM */
+		device_type = "memory";
+		reg = <0x00000000 0x2000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8 root=/dev/mtdblock2 rw rootfstype=squashfs,jffs2 rootwait";
+		stdout-path = "uart0:115200n8";
+	};
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led-status {
+			label = "nslu2:red:status";
+			gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+			linux,default-trigger = "heartbeat";
+		};
+		led-ready {
+			label = "nslu2:green:ready";
+			gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+		led-disk-1 {
+			label = "nslu2:green:disk-1";
+			gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+		led-disk-2 {
+			label = "nslu2:green:disk-2";
+			gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		button-power {
+			wakeup-source;
+			linux,code = <KEY_POWER>;
+			label = "power";
+			gpios = <&gpio0 5 GPIO_ACTIVE_HIGH>;
+		};
+		button-reset {
+			wakeup-source;
+			linux,code = <KEY_ESC>;
+			label = "reset";
+			gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	i2c {
+		compatible = "i2c-gpio";
+		sda-gpios = <&gpio0 7 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+		scl-gpios = <&gpio0 6 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		rtc@6f {
+			compatible = "xicor,x1205";
+			reg = <0x6f>;
+		};
+	};
+
+	gpio-poweroff {
+		compatible = "gpio-poweroff";
+		gpios = <&gpio0 8 GPIO_ACTIVE_HIGH>;
+		timeout-ms = <5000>;
+	};
+
+	/* The first 16MB region on the expansion bus */
+	flash@50000000 {
+		compatible = "intel,ixp4xx-flash", "cfi-flash";
+		bank-width = <2>;
+		/*
+		 * 8 MB of Flash in 0x20000 byte blocks
+		 * mapped in at 0x50000000
+		 */
+		reg = <0x50000000 0x800000>;
+
+		partitions {
+			compatible = "redboot-fis";
+			/* Eraseblock at 0x7e0000 */
+			fis-index-block = <0x3f>;
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/intel-ixp42x.dtsi b/arch/arm/boot/dts/intel-ixp42x.dtsi
new file mode 100644
index 000000000000..a9622ca850cc
--- /dev/null
+++ b/arch/arm/boot/dts/intel-ixp42x.dtsi
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Device Tree file for Intel XScale Network Processors
+ * in the IXP 42x series. This series has 32 interrupts.
+ */
+#include "intel-ixp4xx.dtsi"
+
+/ {
+	soc {
+		interrupt-controller@c8003000 {
+			compatible = "intel,ixp42x-interrupt";
+		};
+
+		/*
+		 * This is the USB Device Mode (UDC) controller, which is used
+		 * to present the IXP4xx as a device on a USB bus.
+		 */
+		usb@c800b000 {
+			compatible = "intel,ixp4xx-udc";
+			reg = <0xc800b000 0x1000>;
+			interrupts = <12 IRQ_TYPE_LEVEL_HIGH>;
+			status = "disabled";
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/intel-ixp43x-gateworks-gw2358.dts b/arch/arm/boot/dts/intel-ixp43x-gateworks-gw2358.dts
new file mode 100644
index 000000000000..ba1163a1e1e7
--- /dev/null
+++ b/arch/arm/boot/dts/intel-ixp43x-gateworks-gw2358.dts
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Device Tree file for Gateworks IXP43x-based Cambria GW2358
+ */
+
+/dts-v1/;
+
+#include "intel-ixp43x.dtsi"
+
+/ {
+	model = "Gateworks Cambria GW2358";
+	compatible = "gateworks,gw2358", "intel,ixp43x";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	memory@0 {
+		/* 128 MB SDRAM */
+		device_type = "memory";
+		reg = <0x00000000 0x8000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8 root=/dev/mtdblock2 rw rootfstype=squashfs,jffs2 rootwait";
+		stdout-path = "uart0:115200n8";
+	};
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led-user {
+			label = "gw2358:green:LED";
+			gpios = <&pld1 0 GPIO_ACTIVE_LOW>;
+			default-state = "on";
+			linux,default-trigger = "heartbeat";
+		};
+	};
+
+
+	i2c {
+		compatible = "i2c-gpio";
+		sda-gpios = <&gpio0 7 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+		scl-gpios = <&gpio0 6 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hwmon@28 {
+			compatible = "adi,ad7418";
+			reg = <0x28>;
+		};
+		rtc: ds1672@68 {
+			compatible = "dallas,ds1672";
+			reg = <0x68>;
+		};
+		eeprom@51 {
+			compatible = "atmel,24c08";
+			reg = <0x51>;
+			pagesize = <16>;
+			size = <1024>;
+			read-only;
+		};
+		pld0: pld@56 {
+			compatible = "gateworks,pld-gpio";
+			reg = <0x56>;
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+		/* This PLD just handles the LED and user button */
+		pld1: pld@57 {
+			compatible = "gateworks,pld-gpio";
+			reg = <0x57>;
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+	};
+
+	flash@50000000 {
+		compatible = "intel,ixp4xx-flash", "cfi-flash";
+		bank-width = <2>;
+		/*
+		 * 32 MB of Flash in 0x20000 byte blocks
+		 * mapped in at 0x50000000
+		 */
+		reg = <0x50000000 0x2000000>;
+
+		partitions {
+			compatible = "redboot-fis";
+			/* Eraseblock at 0x1fe0000 */
+			fis-index-block = <0xff>;
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/intel-ixp43x.dtsi b/arch/arm/boot/dts/intel-ixp43x.dtsi
new file mode 100644
index 000000000000..494fb2ff57a0
--- /dev/null
+++ b/arch/arm/boot/dts/intel-ixp43x.dtsi
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Device Tree file for Intel XScale Network Processors
+ * in the IXP 43x series. This series has 64 interrupts and adds a few more
+ * peripherals over the 42x series.
+ */
+#include "intel-ixp4xx.dtsi"
+
+/ {
+	soc {
+		interrupt-controller@c8003000 {
+			compatible = "intel,ixp43x-interrupt";
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/intel-ixp45x-ixp46x.dtsi b/arch/arm/boot/dts/intel-ixp45x-ixp46x.dtsi
new file mode 100644
index 000000000000..f8cd506659dc
--- /dev/null
+++ b/arch/arm/boot/dts/intel-ixp45x-ixp46x.dtsi
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Device Tree file for Intel XScale Network Processors
+ * in the IXP45x and IXP46x series. This series has 64 interrupts and adds a
+ * few more peripherals over the 42x and 43x series so this extends the
+ * basic IXP4xx DTSI.
+ */
+#include "intel-ixp4xx.dtsi"
+
+/ {
+	soc {
+		interrupt-controller@c8003000 {
+			compatible = "intel,ixp43x-interrupt";
+		};
+
+		/*
+		 * This is the USB Device Mode (UDC) controller, which is used
+		 * to present the IXP4xx as a device on a USB bus.
+		 */
+		usb@c800b000 {
+			compatible = "intel,ixp4xx-udc";
+			reg = <0xc800b000 0x1000>;
+			interrupts = <12 IRQ_TYPE_LEVEL_HIGH>;
+			status = "disabled";
+		};
+
+		i2c@c8011000 {
+			compatible = "intel,ixp4xx-i2c";
+			reg = <0xc8011000 0x18>;
+			interrupts = <33 IRQ_TYPE_LEVEL_HIGH>;
+			status = "disabled";
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/intel-ixp4xx.dtsi b/arch/arm/boot/dts/intel-ixp4xx.dtsi
new file mode 100644
index 000000000000..9edd49509af8
--- /dev/null
+++ b/arch/arm/boot/dts/intel-ixp4xx.dtsi
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Device Tree file for Intel XScale Network Processors
+ * in the IXP 4xx series.
+ */
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+		compatible = "simple-bus";
+		interrupt-parent = <&intcon>;
+
+		uart0: serial@c8000000 {
+			compatible = "intel,xscale-uart";
+			reg = <0xc8000000 0x1000>;
+			/*
+			 * The reg-offset and reg-shift is a side effect
+			 * of running the platform in big endian mode.
+			 */
+			reg-offset = <3>;
+			reg-shift = <2>;
+			interrupts = <15 IRQ_TYPE_LEVEL_HIGH>;
+			clock-frequency = <14745600>;
+			no-loopback-test;
+		};
+
+		gpio0: gpio@c8004000 {
+			compatible = "intel,ixp4xx-gpio";
+			reg = <0xc8004000 0x1000>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+
+		intcon: interrupt-controller@c8003000 {
+			/*
+			 * Note: no compatible string. The subvariant of the
+			 * chip needs to define what version it is. The
+			 * location of the interrupt controller is fixed in
+			 * memory across all variants.
+			 */
+			reg = <0xc8003000 0x100>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+
+		timer@c8005000 {
+			compatible = "intel,ixp4xx-timer";
+			reg = <0xc8005000 0x100>;
+			interrupts = <5 IRQ_TYPE_LEVEL_HIGH>;
+		};
+	};
+};