arm: mvebu: Add Allied Telesis x220

Add the Allied Telesis x220 board. There are a number of other variants
with the same CPU block that are sold under some different brand names
but the x220 was first.

The x220 uses the AlleyCat3 switch chip with integrated ARMv7 CPU.
Because of this it is reliant on a binary blob for the DDR training. In
upstream u-boot this is replaced by an empty file.

Signed-off-by: Chris Packham <[email protected]>
Reviewed-by: Stefan Roese <[email protected]>

3 files changed, 170 insertions, 0 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index b75f3ee4386..722a7a662b1 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -137,6 +137,7 @@ dtb-$(CONFIG_ARCH_MVEBU) +=			\
 	armada-388-gp.dtb			\
 	armada-388-helios4.dtb			\
 	armada-38x-controlcenterdc.dtb		\
+	armada-xp-atl-x220.dtb			\
 	armada-xp-crs305-1g-4s.dtb		\
 	armada-xp-crs305-1g-4s-bit.dtb		\
 	armada-xp-crs326-24g-2s.dtb		\
diff --git a/arch/arm/dts/armada-xp-atl-x220.dts b/arch/arm/dts/armada-xp-atl-x220.dts
new file mode 100644
index 00000000000..5b3307ed288
--- /dev/null
+++ b/arch/arm/dts/armada-xp-atl-x220.dts
@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Device Tree file for x220 board
+ *
+ * Copyright (C) 2025 Allied Telesis Labs
+ */
+
+/dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
+#include "armada-xp-98dx3236.dtsi"
+#include "mvebu-u-boot.dtsi"
+
+/ {
+	model = "x220";
+	compatible = "marvell,armadaxp-98dx3236", "marvell,armadaxp-mv78260",
+		     "marvell,armadaxp", "marvell,armada-370-xp";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs = "console=ttyS0,115200";
+	};
+
+	aliases {
+		i2c0 = &i2c0;
+		spi0 = &spi0;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x00000000 0x00000000 0x20000000>;
+	};
+};
+
+&L2 {
+	arm,parity-enable;
+	marvell,ecc-enable;
+};
+
+&devbus_bootcs {
+	status = "okay";
+
+	/* Device Bus parameters are required */
+
+	/* Read parameters */
+	devbus,bus-width    = <16>;
+	devbus,turn-off-ps  = <60000>;
+	devbus,badr-skew-ps = <0>;
+	devbus,acc-first-ps = <124000>;
+	devbus,acc-next-ps  = <248000>;
+	devbus,rd-setup-ps  = <0>;
+	devbus,rd-hold-ps   = <0>;
+
+	/* Write parameters */
+	devbus,sync-enable = <0>;
+	devbus,wr-high-ps  = <60000>;
+	devbus,wr-low-ps   = <60000>;
+	devbus,ale-wr-ps   = <60000>;
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&i2c0 {
+	clock-frequency = <100000>;
+	status = "okay";
+
+	rtc@68 {
+		compatible = "dallas,ds1340";
+		reg = <0x68>;
+	};
+
+	adt7476a@2e {
+		compatible = "adi,adt7476";
+		reg = <0x2e>;
+	};
+
+	sfpgpio: gpio@27 {
+		#address-cells = <2>;
+		#size-cells = <0>;
+		compatible = "nxp,pca9555";
+		reg = <0x27>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
+	systemgpio: gpio@25 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "nxp,pca9555";
+		reg = <0x25>;
+		gpio-controller;
+		#gpio-cells = <2>;
+
+		nand-protect {
+			gpio-hog;
+			gpios = <6 GPIO_ACTIVE_HIGH>;
+			output-high;
+			line-name = "nand-protect";
+		};
+
+		usb-enable {
+			gpio-hog;
+			gpios = <9 GPIO_ACTIVE_HIGH>;
+			output-high;
+			line-name = "usb-enable";
+		};
+
+		phy-reset {
+			gpio-hog;
+			gpios = <5 GPIO_ACTIVE_LOW>;
+			output-high;
+			line-name = "phy-reset";
+		};
+
+		led-enable {
+			gpio-hog;
+			gpios = <13 GPIO_ACTIVE_HIGH>;
+			output-low;
+			line-name = "led-enable";
+		};
+	};
+};
+
+&watchdog {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+
+	spi-flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "spi-flash", "jedec,spi-nor";
+		reg = <0>; /* Chip select 0 */
+		spi-max-frequency = <20000000>;
+	};
+};
+
+&nand_controller {
+	compatible = "marvell,armada370-nand-controller";
+	label = "pxa3xx_nand-0";
+	status = "okay";
+	nand-rb = <0>;
+	nand-on-flash-bbt;
+	nand-ecc-strength = <4>;
+	nand-ecc-step-size = <512>;
+};
+
+&{/} {
+	boot-board {
+		compatible = "atl,boot-board";
+		present-gpio = <&systemgpio 12 GPIO_ACTIVE_HIGH>;
+		override-gpio = <&gpio0 31 GPIO_ACTIVE_HIGH>;
+	};
+};
+
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 4afaee234ea..0b4df8e7be9 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -226,6 +226,10 @@ config TARGET_X240
 	select ALLEYCAT_5
 	imply BOOTSTD_DEFAULTS
 
+config TARGET_X220
+	bool "Support Allied Telesis x220"
+	select 98DX3336
+
 config TARGET_DB_XC3_24G4XG
 	bool "Support DB-XC3-24G4XG"
 	select 98DX3336
@@ -310,6 +314,7 @@ config SYS_BOARD
 	default "x530" if TARGET_X530
 	default "x250" if TARGET_X250
 	default "x240" if TARGET_X240
+	default "x220" if TARGET_X220
 	default "db-xc3-24g4xg" if TARGET_DB_XC3_24G4XG
 	default "crs3xx-98dx3236" if TARGET_CRS3XX_98DX3236
 	default "mvebu_alleycat-5" if TARGET_MVEBU_ALLEYCAT5
@@ -335,6 +340,7 @@ config SYS_CONFIG_NAME
 	default "x530" if TARGET_X530
 	default "x250" if TARGET_X250
 	default "x240" if TARGET_X240
+	default "x220" if TARGET_X220
 	default "db-xc3-24g4xg" if TARGET_DB_XC3_24G4XG
 	default "crs3xx-98dx3236" if TARGET_CRS3XX_98DX3236
 	default "mvebu_alleycat-5" if TARGET_MVEBU_ALLEYCAT5
@@ -360,6 +366,7 @@ config SYS_VENDOR
 	default "alliedtelesis" if TARGET_X530
 	default "alliedtelesis" if TARGET_X250
 	default "alliedtelesis" if TARGET_X240
+	default "alliedtelesis" if TARGET_X220
 	default "mikrotik" if TARGET_CRS3XX_98DX3236
 	default "Marvell" if TARGET_MVEBU_ALLEYCAT5