ARM: dts: aspeed: Add device tree for Ampere's Mt. Mitchell BMC

The Mt. Mitchell BMC is an ASPEED AST2600-based BMC for the Mt. Mitchell
hardware reference platform with AmpereOne(TM) processor.
Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com>
Signed-off-by: Phong Vo <phong@os.amperecomputing.com>
Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20220817071539.176110-3-quan@os.amperecomputing.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/Makefile

@@ -1576,6 +1576,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
 	aspeed-ast2600-evb.dtb \
 	aspeed-bmc-amd-ethanolx.dtb \
 	aspeed-bmc-ampere-mtjade.dtb \
+	aspeed-bmc-ampere-mtmitchell.dtb \
 	aspeed-bmc-arm-stardragon4800-rep2.dtb \
 	aspeed-bmc-asrock-e3c246d4i.dtb \
 	aspeed-bmc-asrock-romed8hm3.dtb \

arch/arm/boot/dts/aspeed-bmc-ampere-mtmitchell.dts

+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2022, Ampere Computing LLC
+
+/dts-v1/;
+
+#include "aspeed-g6.dtsi"
+#include <dt-bindings/gpio/aspeed-gpio.h>
+
+/ {
+	model = "Ampere Mt.Mitchell BMC";
+	compatible = "ampere,mtmitchell-bmc", "aspeed,ast2600";
+
+	chosen {
+		stdout-path = &uart5;
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x80000000 0x80000000>;
+	};
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		gfx_memory: framebuffer {
+			size = <0x01000000>;
+			alignment = <0x01000000>;
+			compatible = "shared-dma-pool";
+			reusable;
+		};
+
+		video_engine_memory: video {
+			size = <0x04000000>;
+			alignment = <0x01000000>;
+			compatible = "shared-dma-pool";
+			reusable;
+		};
+
+		vga_memory: region@bf000000 {
+			no-map;
+			compatible = "shared-dma-pool";
+			reg = <0xbf000000 0x01000000>;  /* 16M */
+		};
+	};
+
+	voltage_mon_reg: voltage-mon-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "ltc2497_reg";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
+
+	gpioI5mux: mux-controller {
+		compatible = "gpio-mux";
+		#mux-control-cells = <0>;
+		mux-gpios = <&gpio0 ASPEED_GPIO(I, 5) GPIO_ACTIVE_HIGH>;
+	};
+
+	adc0mux: adc0mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc0 0>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc1mux: adc1mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc0 1>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc2mux: adc2mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc0 2>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc3mux: adc3mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc0 3>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc4mux: adc4mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc0 4>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc5mux: adc5mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc0 5>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc6mux: adc6mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc0 6>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc7mux: adc7mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc0 7>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc8mux: adc8mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc1 0>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc9mux: adc9mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc1 1>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc10mux: adc10mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc1 2>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc11mux: adc11mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc1 3>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc12mux: adc12mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc1 4>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc13mux: adc13mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc1 5>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc14mux: adc14mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc1 6>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	adc15mux: adc15mux {
+		compatible = "io-channel-mux";
+		io-channels = <&adc1 7>;
+		#io-channel-cells = <1>;
+		io-channel-names = "parent";
+		mux-controls = <&gpioI5mux>;
+		channels = "s0", "s1";
+	};
+
+	iio-hwmon {
+		compatible = "iio-hwmon";
+		io-channels = <&adc0mux 0>, <&adc0mux 1>,
+			<&adc1mux 0>, <&adc1mux 1>,
+			<&adc2mux 0>, <&adc2mux 1>,
+			<&adc3mux 0>, <&adc3mux 1>,
+			<&adc4mux 0>, <&adc4mux 1>,
+			<&adc5mux 0>, <&adc5mux 1>,
+			<&adc6mux 0>, <&adc6mux 1>,
+			<&adc7mux 0>, <&adc7mux 1>,
+			<&adc8mux 0>, <&adc8mux 1>,
+			<&adc9mux 0>, <&adc9mux 1>,
+			<&adc10mux 0>, <&adc10mux 1>,
+			<&adc11mux 0>, <&adc11mux 1>,
+			<&adc12mux 0>, <&adc12mux 1>,
+			<&adc13mux 0>, <&adc13mux 1>,
+			<&adc14mux 0>, <&adc14mux 1>,
+			<&adc15mux 0>, <&adc15mux 1>,
+			<&adc_i2c 0>, <&adc_i2c 1>,
+			<&adc_i2c 2>, <&adc_i2c 3>,
+			<&adc_i2c 4>, <&adc_i2c 5>,
+			<&adc_i2c 6>, <&adc_i2c 7>,
+			<&adc_i2c 8>, <&adc_i2c 9>,
+			<&adc_i2c 10>, <&adc_i2c 11>,
+			<&adc_i2c 12>, <&adc_i2c 13>,
+			<&adc_i2c 14>, <&adc_i2c 15>;
+	};
+};
+
+&mdio0 {
+	status = "okay";
+
+	ethphy0: ethernet-phy@0 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0>;
+	};
+};
+
+&mac0 {
+	status = "okay";
+
+	phy-mode = "rgmii";
+	phy-handle = <&ethphy0>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_rgmii1_default>;
+};
+
+&fmc {
+	status = "okay";
+	flash@0 {
+		status = "okay";
+		m25p,fast-read;
+		label = "bmc";
+		spi-max-frequency = <50000000>;
+#include "openbmc-flash-layout-64.dtsi"
+	};
+
+	flash@1 {
+		status = "okay";
+		m25p,fast-read;
+		label = "alt-bmc";
+		spi-max-frequency = <50000000>;
+#include "openbmc-flash-layout-64-alt.dtsi"
+	};
+};
+
+&spi1 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spi1_default>;
+
+	flash@0 {
+		status = "okay";
+		m25p,fast-read;
+		label = "pnor";
+		spi-max-frequency = <20000000>;
+	};
+};
+
+&uart1 {
+	status = "okay";
+};
+
+&uart2 {
+	status = "okay";
+};
+
+&uart3 {
+	status = "okay";
+};
+
+&uart4 {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+
+	temperature-sensor@2e {
+		compatible = "adi,adt7490";
+		reg = <0x2e>;
+	};
+};
+
+&i2c1 {
+	status = "okay";
+};
+
+&i2c2 {
+	status = "okay";
+
+	psu@58 {
+		compatible = "pmbus";
+		reg = <0x58>;
+	};
+
+	psu@59 {
+		compatible = "pmbus";
+		reg = <0x59>;
+	};
+};
+
+&i2c3 {
+	status = "okay";
+};
+
+&i2c4 {
+	status = "okay";
+
+	adc_i2c: adc@16 {
+		compatible = "lltc,ltc2497";
+		reg = <0x16>;
+		vref-supply = <&voltage_mon_reg>;
+		#io-channel-cells = <1>;
+	 };
+
+	eeprom@50 {
+		compatible = "atmel,24c64";
+		reg = <0x50>;
+		pagesize = <32>;
+	};
+
+	i2c-mux@70 {
+		compatible = "nxp,pca9545";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x70>;
+		i2c-mux-idle-disconnect;
+
+		i2c4_bus70_chn0: i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0>;
+
+			outlet_temp1: temperature-sensor@48 {
+				compatible = "ti,tmp75";
+				reg = <0x48>;
+			};
+			psu1_inlet_temp2: temperature-sensor@49 {
+				compatible = "ti,tmp75";
+				reg = <0x49>;
+			};
+		};
+
+		i2c4_bus70_chn1: i2c@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x1>;
+
+			pcie_zone_temp1: temperature-sensor@48 {
+				compatible = "ti,tmp75";
+				reg = <0x48>;
+			};
+			psu0_inlet_temp2: temperature-sensor@49 {
+				compatible = "ti,tmp75";
+				reg = <0x49>;
+			};
+		};
+
+		i2c4_bus70_chn2: i2c@2 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x2>;
+
+			pcie_zone_temp2: temperature-sensor@48 {
+				compatible = "ti,tmp75";
+				reg = <0x48>;
+			};
+			outlet_temp2: temperature-sensor@49 {
+				compatible = "ti,tmp75";
+				reg = <0x49>;
+			};
+		};
+
+		i2c4_bus70_chn3: i2c@3 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x3>;
+
+			mb_inlet_temp1: temperature-sensor@7c {
+				compatible = "microchip,emc1413";
+				reg = <0x7c>;
+			};
+			mb_inlet_temp2: temperature-sensor@4c {
+				compatible = "microchip,emc1413";
+				reg = <0x4c>;
+			};
+		};
+	};
+};
+
+&i2c5 {
+	status = "okay";
+
+	i2c-mux@70 {
+		compatible = "nxp,pca9548";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x70>;
+		i2c-mux-idle-disconnect;
+	};
+};
+
+&i2c6 {
+	status = "okay";
+	rtc@51 {
+		compatible = "nxp,pcf85063a";
+		reg = <0x51>;
+	};
+};
+
+&i2c7 {
+	status = "okay";
+};
+
+&i2c9 {
+	status = "okay";
+};
+
+&i2c11 {
+	status = "okay";
+};
+
+&i2c14 {
+	status = "okay";
+	eeprom@50 {
+		compatible = "atmel,24c64";
+		reg = <0x50>;
+		pagesize = <32>;
+	};
+
+	bmc_ast2600_cpu: temperature-sensor@35 {
+		compatible = "ti,tmp175";
+		reg = <0x35>;
+	};
+};
+
+&adc0 {
+	ref_voltage = <2500>;
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_adc0_default &pinctrl_adc1_default
+		&pinctrl_adc2_default &pinctrl_adc3_default
+		&pinctrl_adc4_default &pinctrl_adc5_default
+		&pinctrl_adc6_default &pinctrl_adc7_default>;
+};
+
+&adc1 {
+	ref_voltage = <2500>;
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_adc8_default &pinctrl_adc9_default
+		&pinctrl_adc10_default &pinctrl_adc11_default
+		&pinctrl_adc12_default &pinctrl_adc13_default
+		&pinctrl_adc14_default &pinctrl_adc15_default>;
+};
+
+&vhub {
+	status = "okay";
+};
+
+&video {
+	status = "okay";
+	memory-region = <&video_engine_memory>;
+};
+
+&gpio0 {
+	gpio-line-names =
+	/*A0-A7*/	"","","","","","i2c2-reset-n","i2c6-reset-n","i2c4-reset-n",
+	/*B0-B7*/	"","","","","host0-sysreset-n","host0-pmin-n","","",
+	/*C0-C7*/	"s0-vrd-fault-n","s1-vrd-fault-n","","",
+			"irq-n","","vrd-sel","spd-sel",
+	/*D0-D7*/	"presence-ps0","presence-ps1","hsc-12vmain-alt2-n","ext-high-temp-n",
+			"","bmc-ncsi-txen","","",
+	/*E0-E7*/	"","","clk50m-bmc-ncsi","","","","","",
+	/*F0-F7*/	"s0-pcp-oc-warn-n","s1-pcp-oc-warn-n","power-chassis-control",
+			"cpu-bios-recover","s0-heartbeat","hs-csout-prochot",
+			"s0-vr-hot-n","s1-vr-hot-n",
+	/*G0-G7*/	"","","hsc-12vmain-alt1-n","","","","","",
+	/*H0-H7*/	"","","wd-disable-n","power-chassis-good","","","","",
+	/*I0-I7*/	"","","","","","adc-sw","power-button","rtc-battery-voltage-read-enable",
+	/*J0-J7*/	"","","","","","","","",
+	/*K0-K7*/	"","","","","","","","",
+	/*L0-L7*/	"","","","","","","","",
+	/*M0-M7*/	"","s0-ddr-save","soc-spi-nor-access","presence-cpu0",
+			"s0-rtc-lock","","","",
+	/*N0-N7*/	"hpm-fw-recovery","hpm-stby-rst-n","jtag-sel-s0","led-sw-hb",
+			"jtag-dbgr-prsnt-n","s1-heartbeat","","",
+	/*O0-O7*/	"","","","","","","","",
+	/*P0-P7*/	"ps0-ac-loss-n","ps1-ac-loss-n","","",
+			"led-fault","cpld-user-mode","jtag-srst-n","led-bmc-hb",
+	/*Q0-Q7*/	"","","","","","","","",
+	/*R0-R7*/	"","","","","","","","",
+	/*S0-S7*/	"","","identify-button","led-identify",
+			"s1-ddr-save","spi-nor-access","sys-pgood","presence-cpu1",
+	/*T0-T7*/	"","","","","","","","",
+	/*U0-U7*/	"","","","","","","","",
+	/*V0-V7*/	"s0-hightemp-n","s0-fault-alert","s0-sys-auth-failure-n",
+			"host0-reboot-ack-n","host0-ready","host0-shd-req-n",
+			"host0-shd-ack-n","s0-overtemp-n",
+	/*W0-W7*/	"ocp-aux-pwren","ocp-main-pwren","ocp-pgood","",
+			"bmc-ok","bmc-ready","spi0-program-sel","spi0-backup-sel",
+	/*X0-X7*/	"i2c-backup-sel","s1-fault-alert","s1-fw-boot-ok",
+			"s1-hightemp-n","s0-spi-auth-fail-n","s1-sys-auth-failure-n",
+			"s1-overtemp-n","s1-spi-auth-fail-n",
+	/*Y0-Y7*/	"","","","","","","","host0-special-boot",
+	/*Z0-Z7*/	"reset-button","ps0-pgood","ps1-pgood","","","","","";
+};
+
+&gpio1 {
+	gpio-line-names =
+	/*18A0-18A7*/	"","","","","","","","",
+	/*18B0-18B7*/	"","","","","","","s0-soc-pgood","",
+	/*18C0-18C7*/	"uart1-mode0","uart1-mode1","uart2-mode0","uart2-mode1",
+			"uart3-mode0","uart3-mode1","uart4-mode0","uart4-mode1",
+	/*18D0-18D7*/	"","","","","","","","",
+	/*18E0-18E3*/	"","","","";
+};