linux/arch/arm/boot/dts/aspeed-bmc-facebook-cmm.dts

// SPDX-License-Identifier: GPL-2.0+
// Copyright (c) 2018 Facebook Inc.
/dts-v1/;

#include "aspeed-g5.dtsi"

/ {
	model = "Facebook Backpack CMM BMC";
	compatible = "facebook,cmm-bmc", "aspeed,ast2500";

	aliases {
		/*
		 * Override the default uart aliases to avoid breaking
		 * the legacy applications.
		 */
		serial0 = &uart5;
		serial1 = &uart1;
		serial2 = &uart3;
		serial3 = &uart4;

		/*
		 * Hardcode the bus number of i2c switches' channels to
		 * avoid breaking the legacy applications.
		 */
		i2c16 = &imux16;
		i2c17 = &imux17;
		i2c18 = &imux18;
		i2c19 = &imux19;
		i2c20 = &imux20;
		i2c21 = &imux21;
		i2c22 = &imux22;
		i2c23 = &imux23;
		i2c24 = &imux24;
		i2c25 = &imux25;
		i2c26 = &imux26;
		i2c27 = &imux27;
		i2c28 = &imux28;
		i2c29 = &imux29;
		i2c30 = &imux30;
		i2c31 = &imux31;
		i2c32 = &imux32;
		i2c33 = &imux33;
		i2c34 = &imux34;
		i2c35 = &imux35;
		i2c36 = &imux36;
		i2c37 = &imux37;
		i2c38 = &imux38;
		i2c39 = &imux39;
	};

	chosen {
		stdout-path = &uart1;
		bootargs = "console=ttyS1,9600n8 root=/dev/ram rw earlyprintk";
	};

	memory@80000000 {
		reg = <0x80000000 0x20000000>;
	};

	ast-adc-hwmon {
		compatible = "iio-hwmon";
		io-channels = <&adc 0>, <&adc 1>, <&adc 2>, <&adc 3>,
			      <&adc 4>, <&adc 5>, <&adc 6>, <&adc 7>;
	};
};

&pinctrl {
	aspeed,external-nodes = <&gfx &lhc>;
};

/*
 * Update reset type to "system" (full chip) to fix warm reboot hang issue
 * when reset type is set to default ("soc", gated by reset mask registers).
 */
&wdt1 {
	status = "okay";
	aspeed,reset-type = "system";
};

/*
 * wdt2 is not used by Backpack CMM.
 */
&wdt2 {
	status = "disabled";
};

&fmc {
	status = "okay";
	flash@0 {
		status = "okay";
		m25p,fast-read;
		label = "bmc";
#include "facebook-bmc-flash-layout.dtsi"
	};
};

&uart1 {
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_txd1_default
		     &pinctrl_rxd1_default
		     &pinctrl_ncts1_default
		     &pinctrl_ndcd1_default
		     &pinctrl_ndsr1_default
		     &pinctrl_ndtr1_default
		     &pinctrl_nrts1_default>;
};

&uart3 {
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_txd3_default
		     &pinctrl_rxd3_default
		     &pinctrl_ncts3_default
		     &pinctrl_ndcd3_default
		     &pinctrl_nri3_default>;
};

&uart4 {
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_txd4_default
		     &pinctrl_rxd4_default>;
};

&uart5 {
	status = "okay";
};

&mac1 {
	status = "okay";
	no-hw-checksum;
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_rgmii2_default &pinctrl_mdio2_default>;
};

/*
 * I2C bus reserved for communication with COM-E.
 */
&i2c0 {
	status = "okay";
};

/*
 * I2C bus to Line Cards and Fabric Cards.
 */
&i2c1 {
	status = "okay";

	i2c-switch@77 {
		compatible = "nxp,pca9548";
		#address-cells = <1>;
		#size-cells = <0>;
		reg = <0x77>;

		imux16: i2c@0 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <0>;
		};

		imux17: i2c@1 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <1>;
		};

		imux18: i2c@2 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <2>;
		};

		imux19: i2c@3 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <3>;
		};

		imux20: i2c@4 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <4>;
		};

		imux21: i2c@5 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <5>;
		};

		imux22: i2c@6 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <6>;
		};

		imux23: i2c@7 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <7>;
		};
	};
};

/*
 * I2C bus to Power Distribution Board.
 */
&i2c2 {
	status = "okay";

	i2c-switch@71 {
		compatible = "nxp,pca9548";
		#address-cells = <1>;
		#size-cells = <0>;
		reg = <0x71>;

		imux24: i2c@0 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <0>;
		};

		imux25: i2c@1 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <1>;
		};

		imux26: i2c@2 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <2>;
		};

		imux27: i2c@3 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <3>;
		};

		imux28: i2c@4 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <4>;
		};

		imux29: i2c@5 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <5>;
		};

		imux30: i2c@6 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <6>;
		};

		imux31: i2c@7 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <7>;
		};
	};
};

/*
 * I2c bus connected with temperature sensors on CMM.
 */
&i2c3 {
	status = "okay";
};

/*
 * I2C bus reserved for communication with COM-E.
 */
&i2c4 {
	status = "okay";
};

/*
 * I2c bus connected with ADM1278.
 */
&i2c5 {
	status = "okay";
};

/*
 * I2c bus connected with I/O Expander.
 */
&i2c6 {
	status = "okay";
};

/*
 * I2c bus connected with I/O Expander and EPROMs.
 */
&i2c7 {
	status = "okay";
};

/*
 * I2C bus to Fan Control Board.
 */
&i2c8 {
	status = "okay";

	i2c-switch@77 {
		compatible = "nxp,pca9548";
		#address-cells = <1>;
		#size-cells = <0>;
		reg = <0x77>;

		imux32: i2c@0 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <0>;
		};

		imux33: i2c@1 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <1>;
		};

		imux34: i2c@2 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <2>;
		};

		imux35: i2c@3 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <3>;
		};

		imux36: i2c@4 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <4>;
		};

		imux37: i2c@5 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <5>;
		};

		imux38: i2c@6 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <6>;
		};

		imux39: i2c@7 {
			#address-cells = <1>;
			#size-cells = <0>;
			reg = <7>;
		};
	};
};

/*
 * I2C bus to CMM CPLD.
 */
&i2c13 {
	status = "okay";
};

&adc {
	status = "okay";
};