am335x-evmsk设备树解析

相关名词

1. 节点名称 是一个“<名称>[@<设备地址>]”形式的名字，[]中的名字不是必需的。如果节点描述的设备有一个地址就应该加上单元地址，并且该地址在reg属性中列出。同级节点的名称必须是唯一的，但只要地址不同多个节点也可以使用一样的名称。
   例如：memory@80000000
   vbat: fixedregulator0 节点前的冒号之前的是标签，只出现在DTS文件中，而不会出现在DTB文件里。而靠近大括号的字符串为目录名
2. 系统中每个设备都表示为一个设备树节点，并且它一定要有compatible属性，因为这将作为驱动和设备（设备节点）的匹配依据。
3. compatible属性决定了系统使用哪个驱动来和设备绑定。他是一个字符串列表，格式为"<制造商>,<型号>"，其余字符串则表示为其他与之兼容的设备。
   例如：compatible = “ti,am335x-evmsk”, “ti,am33xx”;

am335x-evmsk.dts解析

本文以am335x开发板的设备树为例进行解析，参考了程昌南老师的《ARM Linux入门与实践一书》，在此表示感谢。设备树源文件在目录 arch/arm/boot/dts/am335x-evmsk.dts

#include "am33xx.dtsi"		/* 包含am33xx系列处理器公用的部分 */
#include 
#include 

/ {							/* 跟节点 */
	model = "TI AM335x EVM-SK";						/* 板级名称 */
	compatible = "ti,am335x-evmsk", "ti,am33xx";	/* Linux通过根节点下的 compatible 属性即可判断它启动的是什么机器，此处定义为TI的am335x-evmsk，兼容TI的am33xx系列 */

	cpus {									/* 描述CPU的个数和类别，该板为单核，只有一个CPU */
		cpu@0 {								/* CPU0 */
			cpu0-supply = <&vdd1_reg>;		/* 指定了CPU的供电电源，vdd1_reg会在下面单独定义 */
		};
	};

	memory@80000000 {						/* 定义了内存的地址和大小 节点名称，形式是: <名称>[@<设备地址>] */
		device_type = "memory";				/* device_type属性用来表示设备类型，用字符串表示 */
		reg = <0x80000000 0x10000000>; 		/* 基地址=0x80000000，大小=0x10000000=256MB */
	};

	chosen {
		stdout-path = &uart0;				/* 指定标准输入输出设备，使用串口0作为输出，串口0在下面有定义 */
	};

	vbat: fixedregulator0 {					/* 固定电压调节器0，输入电源vbat。参考板子原理图VBAT为外部输入电源给电源管理芯片TPS65910A3供电 */
		compatible = "regulator-fixed";		/* compatible属性是用来匹配驱动的，类型是字符串数组，每个字符串表示一种设备的类型 */
		regulator-name = "vbat";			/* 名称 */
		regulator-min-microvolt = <5000000>;/* 固定电压值5V */
		regulator-max-microvolt = <5000000>;
		regulator-boot-on;					/* 默认上电boot就打开ON */
	};

	lis3_reg: fixedregulator1 {				/* 固定电压调节器1，加速度计LIS331DLH供电电源 */
		compatible = "regulator-fixed";		/* 节点前的冒号之前的是标签，只出现在DTS文件中，而不会出现在DTB文件里。而靠近大括号的字符串为目录名 */
		regulator-name = "lis3_reg";
		regulator-boot-on;
	};

	wl12xx_vmmc: fixedregulator2 {			/* 固定电压调节器2，wl12xx_vmmc */
		pinctrl-names = "default";			/* pinctrl-names属性，有default、sleep、idle和init */
		pinctrl-0 = <&wl12xx_gpio>;			/* GPIO引脚复用 */
		compatible = "regulator-fixed";		/* 匹配的驱动 */
		regulator-name = "vwl1271";
		regulator-min-microvolt = <1800000>;/* 固定电压1.8V */
		regulator-max-microvolt = <1800000>;
		gpio = <&gpio1 29 0>;				/* GPIO1_29 最后一个1表示低电平有效，0表示高电平有效 */
		startup-delay-us = <70000>;
		enable-active-high;					/* 高电平有效 */
	};

	vtt_fixed: fixedregulator3 {			/* 固定电压调节器3，vtt_fixed */
		compatible = "regulator-fixed";
		regulator-name = "vtt";
		regulator-min-microvolt = <1500000>;/* 固定电压1.5V */
		regulator-max-microvolt = <1500000>;
		gpio = <&gpio0 7 GPIO_ACTIVE_HIGH>;	/* GPIO0_7 */
		regulator-always-on;
		regulator-boot-on;
		enable-active-high;
	};

	leds {
		pinctrl-names = "default";
		pinctrl-0 = <&user_leds_s0>;			/* 引脚复用，对应pinctrl-names中的default */

		compatible = "gpio-leds";				/* 匹配的驱动 */

		led1 {									
			label = "evmsk:green:usr0";			/* 用户自定义LED */
			gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;/* GPIO1_4，高电平有效，查原理图可知 */
			default-state = "off";				/* 默认状态为灭 */
		};

		led2 {
			label = "evmsk:green:usr1";
			gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
			default-state = "off";
		};

		led3 {
			label = "evmsk:green:mmc0";			/* mmc0指示灯 */
			gpios = <&gpio1 6 GPIO_ACTIVE_HIGH>;
			linux,default-trigger = "mmc0";
			default-state = "off";
		};

		led4 {
			label = "evmsk:green:heartbeat";	/* 心跳指示灯 */
			gpios = <&gpio1 7 GPIO_ACTIVE_HIGH>;
			linux,default-trigger = "heartbeat";
			default-state = "off";
		};
	};

	gpio_buttons: gpio_buttons0 {
		compatible = "gpio-keys";
		#address-cells = <1>;		/* 用来描述子节点中reg属性中address的多少 */
		#size-cells = <0>;			/* 用来描述子节点中reg属性中地址长度的多少 */

		switch1 {
			label = "button0";
			linux,code = <0x100>;	/* 一个address-cells，首地址为0x100 */
			gpios = <&gpio2 3 GPIO_ACTIVE_HIGH>;
		};

		switch2 {
			label = "button1";
			linux,code = <0x101>;
			gpios = <&gpio2 2 GPIO_ACTIVE_HIGH>;
		};

		switch3 {
			label = "button2";
			linux,code = <0x102>;
			gpios = <&gpio0 30 GPIO_ACTIVE_HIGH>;
			wakeup-source;
		};

		switch4 {
			label = "button3";
			linux,code = <0x103>;
			gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
		};
	};

	lcd_bl: backlight {										/* lcd背光电源PWM控制输出 */
		compatible = "pwm-backlight";
		pwms = <&ecap2 0 50000 PWM_POLARITY_INVERTED>;		/*  */
		brightness-levels = <0 58 61 66 75 90 125 170 255>;	/* 0-255，共9个level */
		default-brightness-level = <8>;						/* 默认level */
	};

	sound {		/* 声卡 */
		compatible = "simple-audio-card";
		simple-audio-card,name = "AM335x-EVMSK";
		simple-audio-card,widgets =
			"Headphone", "Headphone Jack";
		simple-audio-card,routing =
			"Headphone Jack",	"HPLOUT",
			"Headphone Jack",	"HPROUT";
		simple-audio-card,format = "dsp_b";
		simple-audio-card,bitclock-master = <&sound_master>;
		simple-audio-card,frame-master = <&sound_master>;
		simple-audio-card,bitclock-inversion;

		simple-audio-card,cpu {
			sound-dai = <&mcasp1>;
		};

		sound_master: simple-audio-card,codec {
			sound-dai = <&tlv320aic3106>;
			system-clock-frequency = <24000000>;
		};
	};

	panel {									/* LCD */
		compatible = "ti,tilcdc,panel";		/* 匹配的驱动 */
		pinctrl-names = "default", "sleep";
		pinctrl-0 = <&lcd_pins_default>;	/* 对应pinctrl-names中的default */
		pinctrl-1 = <&lcd_pins_sleep>;		/* 对应pinctrl-names中的sleep   */
		backlight = <&lcd_bl>;				/* 背光电源 */
		status = "okay";
		panel-info {						/* LCD硬件配置信息 */
			ac-bias		= <255>;			/* 偏置电压，该数代表使用多少个电压参考点来驱动LCD */
			ac-bias-intrpt	= <0>;			/*  */
			dma-burst-sz	= <16>;			/* DMA传输请求时 */
			bpp		= <32>;					/* 颜色分辨率 */
			fdd		= <0x80>;				/* FIFO DMA Request Delay */
			sync-edge	= <0>;				/* LCD_HSYNC脉冲和LCD_VSYNC脉冲下降沿有效 */
			sync-ctrl	= <1>;				/* 允许配置同步脉冲上升沿还是下降沿有效，即配置sync-edge有效 */
			raster-order	= <0>;			/* 行扫顺序 */
			fifo-th		= <0>;				/* FIFO阈值 */
		};
		display-timings {					/* LCD时序 */
			480x272 {						/* LCD分辨率 */
				hactive		= <480>;		/* 水平(行)方向有效像素点数 */
				vactive		= <272>;		/* 垂直(场)方向有效像素点数 */
				hback-porch	= <43>;			/* 水平方向后肩消影时间 */
				hfront-porch	= <8>;		/* 水平方向前肩消影时间 */
				hsync-len	= <4>;			/* 水平同步的长度 */
				vback-porch	= <12>;			/* 垂直方向后肩消影时间 */
				vfront-porch	= <4>;		/* 垂直方向前肩消影时间 */
				vsync-len	= <10>;			/* 垂直同步的长度 */
				clock-frequency = <9000000>;/* 像素时钟频率 */
				hsync-active	= <0>;		/* 水平方向同步的有效像素点 */
				vsync-active	= <0>;		/* 垂直方向同步的有效像素点 */
			};
		};
	};
};			/* 根节点结束 */

&am33xx_pinmux {	/* 引脚复用配置信息 */
	pinctrl-names = "default";
	pinctrl-0 = <&gpio_keys_s0 &clkout2_pin &ddr3_vtt_toggle>;

	ddr3_vtt_toggle: ddr3_vtt_toggle {
		pinctrl-single,pins = <
			0x164 (PIN_OUTPUT | MUX_MODE7)	/* ecap0_in_pwm0_out.gpio0_7 */
		>;
	};	/* 芯片引脚的复用使用pinctrl-single,pins这个驱动。格式是pinctrl-single,pins =  */
		/* 内核解析该属性后根据offset和function配置对应的寄存器，为GPIO引脚配置为指定的复用功能 */
		
	lcd_pins_default: lcd_pins_default {	/* 默认状态下，LCD相关的多功能复用引脚的功能设置为LCD */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x820, PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad8.lcd_data23 */
			AM33XX_IOPAD(0x824, PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad9.lcd_data22 */
			AM33XX_IOPAD(0x828, PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad10.lcd_data21 */
			AM33XX_IOPAD(0x82c, PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad11.lcd_data20 */
			AM33XX_IOPAD(0x830, PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad12.lcd_data19 */
			AM33XX_IOPAD(0x834, PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad13.lcd_data18 */
			AM33XX_IOPAD(0x838, PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad14.lcd_data17 */
			AM33XX_IOPAD(0x83c, PIN_OUTPUT | MUX_MODE1)	/* gpmc_ad15.lcd_data16 */
			AM33XX_IOPAD(0x8a0, PIN_OUTPUT | MUX_MODE0)	/* lcd_data0.lcd_data0 */
			AM33XX_IOPAD(0x8a4, PIN_OUTPUT | MUX_MODE0)	/* lcd_data1.lcd_data1 */
			AM33XX_IOPAD(0x8a8, PIN_OUTPUT | MUX_MODE0)	/* lcd_data2.lcd_data2 */
			AM33XX_IOPAD(0x8ac, PIN_OUTPUT | MUX_MODE0)	/* lcd_data3.lcd_data3 */
			AM33XX_IOPAD(0x8b0, PIN_OUTPUT | MUX_MODE0)	/* lcd_data4.lcd_data4 */
			AM33XX_IOPAD(0x8b4, PIN_OUTPUT | MUX_MODE0)	/* lcd_data5.lcd_data5 */
			AM33XX_IOPAD(0x8b8, PIN_OUTPUT | MUX_MODE0)	/* lcd_data6.lcd_data6 */
			AM33XX_IOPAD(0x8bc, PIN_OUTPUT | MUX_MODE0)	/* lcd_data7.lcd_data7 */
			AM33XX_IOPAD(0x8c0, PIN_OUTPUT | MUX_MODE0)	/* lcd_data8.lcd_data8 */
			AM33XX_IOPAD(0x8c4, PIN_OUTPUT | MUX_MODE0)	/* lcd_data9.lcd_data9 */
			AM33XX_IOPAD(0x8c8, PIN_OUTPUT | MUX_MODE0)	/* lcd_data10.lcd_data10 */
			AM33XX_IOPAD(0x8cc, PIN_OUTPUT | MUX_MODE0)	/* lcd_data11.lcd_data11 */
			AM33XX_IOPAD(0x8d0, PIN_OUTPUT | MUX_MODE0)	/* lcd_data12.lcd_data12 */
			AM33XX_IOPAD(0x8d4, PIN_OUTPUT | MUX_MODE0)	/* lcd_data13.lcd_data13 */
			AM33XX_IOPAD(0x8d8, PIN_OUTPUT | MUX_MODE0)	/* lcd_data14.lcd_data14 */
			AM33XX_IOPAD(0x8dc, PIN_OUTPUT | MUX_MODE0)	/* lcd_data15.lcd_data15 */
			AM33XX_IOPAD(0x8e0, PIN_OUTPUT | MUX_MODE0)	/* lcd_vsync.lcd_vsync */
			AM33XX_IOPAD(0x8e4, PIN_OUTPUT | MUX_MODE0)	/* lcd_hsync.lcd_hsync */
			AM33XX_IOPAD(0x8e8, PIN_OUTPUT | MUX_MODE0)	/* lcd_pclk.lcd_pclk */
			AM33XX_IOPAD(0x8ec, PIN_OUTPUT | MUX_MODE0)	/* lcd_ac_bias_en.lcd_ac_bias_en */
		>;
	};

	lcd_pins_sleep: lcd_pins_sleep {	/* 待机休眠下，LCD相关的多功能复用引脚的功能设置为GPIO输入 */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x820, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad8.lcd_data23   */
			AM33XX_IOPAD(0x824, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad9.lcd_data22   */
			AM33XX_IOPAD(0x828, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad10.lcd_data21  */
			AM33XX_IOPAD(0x82c, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad11.lcd_data20  */
			AM33XX_IOPAD(0x830, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad12.lcd_data19  */
			AM33XX_IOPAD(0x834, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad13.lcd_data18  */
			AM33XX_IOPAD(0x838, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad14.lcd_data17  */
			AM33XX_IOPAD(0x83c, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ad15.lcd_data16  */
			AM33XX_IOPAD(0x8a0, PULL_DISABLE | MUX_MODE7)		/* lcd_data0.lcd_data0   */
			AM33XX_IOPAD(0x8a4, PULL_DISABLE | MUX_MODE7)		/* lcd_data1.lcd_data1   */
			AM33XX_IOPAD(0x8a8, PULL_DISABLE | MUX_MODE7)		/* lcd_data2.lcd_data2   */
			AM33XX_IOPAD(0x8ac, PULL_DISABLE | MUX_MODE7)		/* lcd_data3.lcd_data3   */
			AM33XX_IOPAD(0x8b0, PULL_DISABLE | MUX_MODE7)		/* lcd_data4.lcd_data4   */
			AM33XX_IOPAD(0x8b4, PULL_DISABLE | MUX_MODE7)		/* lcd_data5.lcd_data5   */
			AM33XX_IOPAD(0x8b8, PULL_DISABLE | MUX_MODE7)		/* lcd_data6.lcd_data6   */
			AM33XX_IOPAD(0x8bc, PULL_DISABLE | MUX_MODE7)		/* lcd_data7.lcd_data7   */
			AM33XX_IOPAD(0x8c0, PULL_DISABLE | MUX_MODE7)		/* lcd_data8.lcd_data8   */
			AM33XX_IOPAD(0x8c4, PULL_DISABLE | MUX_MODE7)		/* lcd_data9.lcd_data9   */
			AM33XX_IOPAD(0x8c8, PULL_DISABLE | MUX_MODE7)		/* lcd_data10.lcd_data10 */
			AM33XX_IOPAD(0x8cc, PULL_DISABLE | MUX_MODE7)		/* lcd_data11.lcd_data11 */
			AM33XX_IOPAD(0x8d0, PULL_DISABLE | MUX_MODE7)		/* lcd_data12.lcd_data12 */
			AM33XX_IOPAD(0x8d4, PULL_DISABLE | MUX_MODE7)		/* lcd_data13.lcd_data13 */
			AM33XX_IOPAD(0x8d8, PULL_DISABLE | MUX_MODE7)		/* lcd_data14.lcd_data14 */
			AM33XX_IOPAD(0x8dc, PULL_DISABLE | MUX_MODE7)		/* lcd_data15.lcd_data15 */
			AM33XX_IOPAD(0x8e0, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* lcd_vsync.lcd_vsync 	 */
			AM33XX_IOPAD(0x8e4, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* lcd_hsync.lcd_hsync   */
			AM33XX_IOPAD(0x8e8, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* lcd_pclk.lcd_pclk     */
			AM33XX_IOPAD(0x8ec, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* lcd_ac_bias_en.lcd_ac_bias_en */
		>;
	};


	user_leds_s0: user_leds_s0 {	/* 默认LED引脚配置成GPIO输出且上拉 */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x810, PIN_OUTPUT_PULLDOWN | MUX_MODE7)/* gpmc_ad4.gpio1_4 */
			AM33XX_IOPAD(0x814, PIN_OUTPUT_PULLDOWN | MUX_MODE7)/* gpmc_ad5.gpio1_5 */
			AM33XX_IOPAD(0x818, PIN_OUTPUT_PULLDOWN | MUX_MODE7)/* gpmc_ad6.gpio1_6 */
			AM33XX_IOPAD(0x81c, PIN_OUTPUT_PULLDOWN | MUX_MODE7)/* gpmc_ad7.gpio1_7 */
		>;
	};

	gpio_keys_s0: gpio_keys_s0 {	/* 默认按键引脚配置为输入 */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x894, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_oen_ren.gpio2_3  */
			AM33XX_IOPAD(0x890, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_advn_ale.gpio2_2 */
			AM33XX_IOPAD(0x870, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_wait0.gpio0_30   */
			AM33XX_IOPAD(0x89c, PIN_INPUT_PULLDOWN | MUX_MODE7)	/* gpmc_ben0_cle.gpio2_5 */
		>;
	};

	i2c0_pins: pinmux_i2c0_pins {	/* I2c0引脚 */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x988, PIN_INPUT_PULLUP | MUX_MODE0)	/* i2c0_sda.i2c0_sda */
			AM33XX_IOPAD(0x98c, PIN_INPUT_PULLUP | MUX_MODE0)	/* i2c0_scl.i2c0_scl */
		>;
	};

	uart0_pins: pinmux_uart0_pins {	/* UART0引脚 */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x970, PIN_INPUT_PULLUP | MUX_MODE0)	/* uart0_rxd.uart0_rxd */
			AM33XX_IOPAD(0x974, PIN_OUTPUT_PULLDOWN | MUX_MODE0)/* uart0_txd.uart0_txd */
		>;
	};

	clkout2_pin: pinmux_clkout2_pin {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x9b4, PIN_OUTPUT_PULLDOWN | MUX_MODE3)/* xdma_event_intr1.clkout2 */
		>;
	};

	ecap2_pins: backlight_pins {	/* LCD背光电源调节引脚 */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x99c, MUX_MODE4)	/* mcasp0_ahclkr.ecap2_in_pwm2_out */
		>;
	};

	cpsw_default: cpsw_default {	/* 以太网接口 */
		pinctrl-single,pins = <
			/* Slave 1 */
			AM33XX_IOPAD(0x914, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txen.rgmii1_tctl  */
			AM33XX_IOPAD(0x918, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* mii1_rxdv.rgmii1_rctl  */
			AM33XX_IOPAD(0x91c, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txd3.rgmii1_td3   */
			AM33XX_IOPAD(0x920, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txd2.rgmii1_td2   */
			AM33XX_IOPAD(0x924, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txd1.rgmii1_td1   */
			AM33XX_IOPAD(0x928, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txd0.rgmii1_td0   */
			AM33XX_IOPAD(0x92c, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* mii1_txclk.rgmii1_tclk */
			AM33XX_IOPAD(0x930, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* mii1_rxclk.rgmii1_rclk */
			AM33XX_IOPAD(0x934, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* mii1_rxd3.rgmii1_rd3   */
			AM33XX_IOPAD(0x938, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* mii1_rxd2.rgmii1_rd2   */
			AM33XX_IOPAD(0x93c, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* mii1_rxd1.rgmii1_rd1   */
			AM33XX_IOPAD(0x940, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* mii1_rxd0.rgmii1_rd0   */

			/* Slave 2 */
			AM33XX_IOPAD(0x840, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* gpmc_a0.rgmii2_tctl */
			AM33XX_IOPAD(0x844, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* gpmc_a1.rgmii2_rctl */
			AM33XX_IOPAD(0x848, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* gpmc_a2.rgmii2_td3  */
			AM33XX_IOPAD(0x84c, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* gpmc_a3.rgmii2_td2  */
			AM33XX_IOPAD(0x850, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* gpmc_a4.rgmii2_td1  */
			AM33XX_IOPAD(0x854, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* gpmc_a5.rgmii2_td0  */
			AM33XX_IOPAD(0x858, PIN_OUTPUT_PULLDOWN | MUX_MODE2)	/* gpmc_a6.rgmii2_tclk */
			AM33XX_IOPAD(0x85c, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* gpmc_a7.rgmii2_rclk */
			AM33XX_IOPAD(0x860, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* gpmc_a8.rgmii2_rd3  */
			AM33XX_IOPAD(0x864, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* gpmc_a9.rgmii2_rd2  */
			AM33XX_IOPAD(0x868, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* gpmc_a10.rgmii2_rd1 */
			AM33XX_IOPAD(0x86c, PIN_INPUT_PULLDOWN  | MUX_MODE2)	/* gpmc_a11.rgmii2_rd0 */
		>;
	};

	cpsw_sleep: cpsw_sleep {		/* 待机休眠状态下，双千兆以太网接口配制成GPIO输入 */
		pinctrl-single,pins = <
			/* Slave 1 reset value */
			AM33XX_IOPAD(0x914, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x918, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x91c, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x920, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x924, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x928, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x92c, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x930, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x934, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x938, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x93c, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x940, PIN_INPUT_PULLDOWN | MUX_MODE7)

			/* Slave 2 reset value*/
			AM33XX_IOPAD(0x840, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x844, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x848, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x84c, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x850, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x854, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x858, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x85c, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x860, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x864, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x868, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x86c, PIN_INPUT_PULLDOWN | MUX_MODE7)
		>;
	};

	davinci_mdio_default: davinci_mdio_default {
		pinctrl-single,pins = <
			/* MDIO */
			AM33XX_IOPAD(0x948, PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE0)/* mdio_data.mdio_data */
			AM33XX_IOPAD(0x94c, PIN_OUTPUT_PULLUP | MUX_MODE0)				 /* mdio_clk.mdio_clk   */
		>;
	};

	davinci_mdio_sleep: davinci_mdio_sleep {
		pinctrl-single,pins = <
			/* MDIO reset value */
			AM33XX_IOPAD(0x948, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x94c, PIN_INPUT_PULLDOWN | MUX_MODE7)
		>;
	};

	mmc1_pins: pinmux_mmc1_pins {	/* MIcroSD写保护检测输入引脚配置 */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x960, PIN_INPUT | MUX_MODE7) 			/* spi0_cs1.gpio0_6    */
			AM33XX_IOPAD(0x8fc, PIN_INPUT_PULLUP | MUX_MODE0)	/* mmc0_dat0.mmc0_dat0 */
			AM33XX_IOPAD(0x8f8, PIN_INPUT_PULLUP | MUX_MODE0)	/* mmc0_dat1.mmc0_dat1 */
			AM33XX_IOPAD(0x8f4, PIN_INPUT_PULLUP | MUX_MODE0)	/* mmc0_dat2.mmc0_dat2 */
			AM33XX_IOPAD(0x8f0, PIN_INPUT_PULLUP | MUX_MODE0)	/* mmc0_dat3.mmc0_dat3 */
			AM33XX_IOPAD(0x904, PIN_INPUT_PULLUP | MUX_MODE0)	/* mmc0_cmd.mmc0_cmd   */
			AM33XX_IOPAD(0x900, PIN_INPUT_PULLUP | MUX_MODE0)	/* mmc0_clk.mmc0_clk   */
			AM33XX_IOPAD(0x9a0, PIN_INPUT | MUX_MODE4)			/* mcasp0_aclkr.mmc0_sdwp */
		>;
	};

	mcasp1_pins: mcasp1_pins {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x90c, PIN_INPUT_PULLDOWN | MUX_MODE4) /* mii1_crs.mcasp1_aclkx */
			AM33XX_IOPAD(0x910, PIN_INPUT_PULLDOWN | MUX_MODE4) /* mii1_rxerr.mcasp1_fsx */
			AM33XX_IOPAD(0x908, PIN_OUTPUT_PULLDOWN| MUX_MODE4) /* mii1_col.mcasp1_axr2 */
			AM33XX_IOPAD(0x944, PIN_INPUT_PULLDOWN | MUX_MODE4) /* rmii1_ref_clk.mcasp1_axr3 */
		>;
	};

	mcasp1_pins_sleep: mcasp1_pins_sleep {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x90c, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x910, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x908, PIN_INPUT_PULLDOWN | MUX_MODE7)
			AM33XX_IOPAD(0x944, PIN_INPUT_PULLDOWN | MUX_MODE7)
		>;
	};

	mmc2_pins: pinmux_mmc2_pins {	/* WLAN接口 */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x874, PIN_INPUT_PULLUP | MUX_MODE7) /* gpmc_wpn.gpio0_31  */
			AM33XX_IOPAD(0x880, PIN_INPUT_PULLUP | MUX_MODE2) /* gpmc_csn1.mmc1_clk */
			AM33XX_IOPAD(0x884, PIN_INPUT_PULLUP | MUX_MODE2) /* gpmc_csn2.mmc1_cmd */
			AM33XX_IOPAD(0x800, PIN_INPUT_PULLUP | MUX_MODE1) /* gpmc_ad0.mmc1_dat0 */
			AM33XX_IOPAD(0x804, PIN_INPUT_PULLUP | MUX_MODE1) /* gpmc_ad1.mmc1_dat1 */
			AM33XX_IOPAD(0x808, PIN_INPUT_PULLUP | MUX_MODE1) /* gpmc_ad2.mmc1_dat2 */
			AM33XX_IOPAD(0x80c, PIN_INPUT_PULLUP | MUX_MODE1) /* gpmc_ad3.mmc1_dat3 */
		>;
	};

	wl12xx_gpio: pinmux_wl12xx_gpio {	/* WLAN_EN */
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x87c, PIN_OUTPUT_PULLUP | MUX_MODE7) /* gpmc_csn0.gpio1_29 */
		>;
	};
};	/* 引脚复用配置结束 */

&uart0 {
	pinctrl-names = "default";
	pinctrl-0 = <&uart0_pins>;	/* UART0引脚复用配置，指向之前的uart0_pins */

	status = "okay";
};

&i2c0 {
	pinctrl-names = "default";
	pinctrl-0 = <&i2c0_pins>;

	status = "okay";
	clock-frequency = <400000>;	/* I2C0时钟频率 */

	tps: tps@2d {				/* 电源管理芯片 TPS65910A3 */
		reg = <0x2d>;			/* TPS65910A3芯片I2C接口器件地址 */
	};
	
	mpu6050: mpu6050@68 {
		compatible = "ti,mpu6050";
		reg = <0x68>;
	};

	mpu6050_1: mpu6050_1@69 {
		compatible = "ti,mpu6050_1";
		reg = <0x69>;
	};

	lis331dlh: lis331dlh@18 {			/* 加速度计 LIS331DLH */
		compatible = "st,lis331dlh", "st,lis3lv02d";
		reg = <0x18>;					/* LIS331DLH 芯片I2C接口器件地址 */
		Vdd-supply = <&lis3_reg>;		/* 指定了加速度计的供电电源 */
		Vdd_IO-supply = <&lis3_reg>;

		st,click-single-x;
		st,click-single-y;
		st,click-single-z;
		st,click-thresh-x = <10>;
		st,click-thresh-y = <10>;
		st,click-thresh-z = <10>;
		st,irq1-click;
		st,irq2-click;
		st,wakeup-x-lo;
		st,wakeup-x-hi;
		st,wakeup-y-lo;
		st,wakeup-y-hi;
		st,wakeup-z-lo;
		st,wakeup-z-hi;
		st,min-limit-x = <120>;
		st,min-limit-y = <120>;
		st,min-limit-z = <140>;
		st,max-limit-x = <550>;
		st,max-limit-y = <550>;
		st,max-limit-z = <750>;
	};

	tlv320aic3106: tlv320aic3106@1b {	/* 音频编解码器 TLV320AIC3106 */
		#sound-dai-cells = <0>;
		compatible = "ti,tlv320aic3106";/* 音频驱动 */
		reg = <0x1b>;					/* TLV320AIC3106 芯片I2C接口器件地址 */
		status = "okay";

		/* Regulators */
		AVDD-supply = <&vaux2_reg>;
		IOVDD-supply = <&vaux2_reg>;
		DRVDD-supply = <&vaux2_reg>;
		DVDD-supply = <&vbat>;
	};
};

&usb {
	status = "okay";
};

&usb_ctrl_mod {
	status = "okay";
};

&usb0_phy {
	status = "okay";
};

&usb1_phy {
	status = "okay";
};

&usb0 {
	status = "okay";
};

&usb1 {
	status = "okay";
	dr_mode = "host";
};

&cppi41dma  {
	status = "okay";
};

&epwmss2 {	/* PWM2 LCD背光调节输出 */
	status = "okay";

	ecap2: ecap@48304100 {
		status = "okay";
		pinctrl-names = "default";
		pinctrl-0 = <&ecap2_pins>;
	};
};

&wkup_m3_ipc {
	ti,needs-vtt-toggle;
	ti,vtt-gpio-pin = <7>;
	ti,scale-data-fw = "am335x-evm-scale-data.bin";
};

#include "tps65910.dtsi"

&tps {		/* 电源管理芯片 TPS65910A3 */
	vcc1-supply = <&vbat>;
	vcc2-supply = <&vbat>;
	vcc3-supply = <&vbat>;
	vcc4-supply = <&vbat>;
	vcc5-supply = <&vbat>;
	vcc6-supply = <&vbat>;
	vcc7-supply = <&vbat>;	/* vcc1~vcc7的电源输入都由vbat提供 */
	vccio-supply = <&vbat>;

	regulators {
		vrtc_reg: regulator@0 {
			regulator-always-on;
		};

		vio_reg: regulator@1 {
			regulator-always-on;
		};

		vdd1_reg: regulator@2 {
			/* VDD_MPU voltage limits 0.95V - 1.26V with +/-4% tolerance */
			regulator-name = "vdd_mpu";
			regulator-min-microvolt = <912500>;
			regulator-max-microvolt = <1351500>;
			regulator-boot-on;
			regulator-always-on;
		};

		vdd2_reg: regulator@3 {
			/* VDD_CORE voltage limits 0.95V - 1.1V with +/-4% tolerance */
			regulator-name = "vdd_core";
			regulator-min-microvolt = <912500>;
			regulator-max-microvolt = <1150000>;
			regulator-boot-on;
			regulator-always-on;
		};

		vdd3_reg: regulator@4 {
			regulator-always-on;
		};

		vdig1_reg: regulator@5 {
			regulator-always-on;
		};

		vdig2_reg: regulator@6 {
			regulator-always-on;
		};

		vpll_reg: regulator@7 {
			regulator-always-on;
		};

		vdac_reg: regulator@8 {
			regulator-always-on;
		};

		vaux1_reg: regulator@9 {
			regulator-always-on;
		};

		vaux2_reg: regulator@10 {
			regulator-always-on;
		};

		vaux33_reg: regulator@11 {
			regulator-always-on;
		};

		vmmc_reg: regulator@12 {
			regulator-min-microvolt = <1800000>;
			regulator-max-microvolt = <3300000>;
			regulator-always-on;
		};
	};
};

&mac {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&cpsw_default>;
	pinctrl-1 = <&cpsw_sleep>;
	dual_emac = <1>;
	status = "okay";
};

&davinci_mdio {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&davinci_mdio_default>;
	pinctrl-1 = <&davinci_mdio_sleep>;
	status = "okay";
};

&cpsw_emac0 {
	phy_id = <&davinci_mdio>, <0>;
	phy-mode = "rgmii-txid";
	dual_emac_res_vlan = <1>;
};

&cpsw_emac1 {
	phy_id = <&davinci_mdio>, <1>;
	phy-mode = "rgmii-txid";
	dual_emac_res_vlan = <2>;
};

&mmc1 {
	status = "okay";
	vmmc-supply = <&vmmc_reg>;
	bus-width = <4>;
	pinctrl-names = "default";
	pinctrl-0 = <&mmc1_pins>;
	cd-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
};

&sham {
	status = "okay";
};

&aes {
	status = "okay";
};

&gpio0 {
	ti,no-reset-on-init;
};

&mmc2 {
	status = "okay";
	vmmc-supply = <&wl12xx_vmmc>;
	ti,non-removable;
	bus-width = <4>;
	cap-power-off-card;
	keep-power-in-suspend;
	pinctrl-names = "default";
	pinctrl-0 = <&mmc2_pins>;

	#address-cells = <1>;
	#size-cells = <0>;
	wlcore: wlcore@2 {
		compatible = "ti,wl1271";
		reg = <2>;
		interrupt-parent = <&gpio0>;
		interrupts = <31 IRQ_TYPE_LEVEL_HIGH>; /* gpio 31 */
		ref-clock-frequency = <38400000>;
	};
};

&mcasp1 {
	#sound-dai-cells = <0>;
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&mcasp1_pins>;
	pinctrl-1 = <&mcasp1_pins_sleep>;

	status = "okay";

	op-mode = <0>;          /* MCASP_IIS_MODE */
	tdm-slots = <2>;
	/* 4 serializers */
	serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX */
		0 0 1 2
	>;
	tx-num-evt = <32>;
	rx-num-evt = <32>;
};

&tscadc {
	status = "okay";
	tsc {
		ti,wires = <4>;
		ti,x-plate-resistance = <200>;
		ti,coordinate-readouts = <5>;
		ti,wire-config = <0x00 0x11 0x22 0x33>;
	};
};

&lcdc {
	status = "okay";

	blue-and-red-wiring = "crossed";
};

&sgx {
	status = "okay";
};

&rtc {
	clocks = <&clk_32768_ck>, <&clkdiv32k_ick>;
	clock-names = "ext-clk", "int-clk";
};

&pruss_soc_bus {
	status = "okay";

	pruss: pruss@0 {
		status = "okay";
	};
};