BoardType（以TSB为例）

电源管理

芯片为AXP803，完整电源轨定义。

pmu0: pmu@34 {
    compatible = "x-powers,axp803";
    ...
    regulator0: regulators@0 {
        reg_dcdc1: dcdc1 { regulator-name = "axp803-dcdc1"; ... };
        reg_dcdc2: dcdc2 { regulator-name = "axp803-dcdc2"; ... };
        ...
    };
};

GPIO

    //#define GPIO_FUNCTION_OUTPUT 0 （可设置高低电平）
    //#define GPIO_FUNCTION_INPUT 1 （可读取状态）
    //#define GPIO_FUNCTION_IRQ 2     中断功能（触发）
    //#define GPIO_FUNCTION_FLASH 3     用作 Flash IO
    //#define GPIO_FUNCTION_OUTPUT_CTRL 4    受控输出（可能由其他信号控制）
    status = "okay";
    compatible = "yz_gpio";        //定义了一个自定义的 yz_gpio 节点。
yz_gpio {         //gpio_function = <num>  0: 输出，1: 输入，2: 中断
    PB3 { gpio_function = <0>; }; // 输出  
    PE3 { gpio_function = <1>; }; // 输入
    ...
};

I²C

twi1: twi@0x05002400 {     //twi设备，上挂了RTC时钟电池
    status = "okay";
    pcf8563 {
        compatible = "nxp,pcf8563";  // RTC 芯片
        reg = <0x51>;
    };
};
twi2: twi@0x05002800 {      //上挂触摸芯片GT911
    status = "okay";
    ctp {
        compatible = "allwinner,goodix"; // GT911 触摸屏
        reg = <0x14>;
        ctp_name = "GT911_1024x600";     //分辨率1024x600
    };
};
twi3: twi@0x05002c00{
            clock-frequency = <200000>;
            pinctrl-0 = <&twi3_pins_a>;
            pinctrl-1 = <&twi3_pins_b>;
            status = "disabled";    //默认为禁用

SPI

可挂 MCP2515 CAN 控制器（默认禁用）

spi1: spi@05011000 {           //SPI1总线上挂两个can控制器
            pinctrl-0 = <&spi1_pins_a &spi1_pins_b>;
            pinctrl-1 = <&spi1_pins_c>;
            spi_slave_mode = <0>;
            spi1_cs_bitmap = <3>; 
            spi1_cs_number = <2>; 
            status = "disabled";
            can0 {
                device_type = "can0";
                ...
                status = "disabled";    //默认状态为禁用，TSI需改成“okay"
            };
            can1{
                device_type = "can1";
                ...
                status = "disabled";
            };
            spidev {
                compatible      = "helpera133_spidev";
                spi-max-frequency = <10000000>;
                reg             =<0x0>;
                status = "disabled";
            };
        };spi1: spi@05011000 {
    can0 { compatible = "microchip,mcp2515"; ... };
    can1 { compatible = "microchip,mcp2515"; ... };
    spidev { compatible = "helpera133_spidev"; ... };
};

存储

sdc2: sdmmc@04022000 {             //板载emmc
            non-removable;
            bus-width = <8>;       //8bit总线
            ...
            status = "disabled";   //默认禁用
        };
sdc0: sdmmc@04020000 {              //TF卡槽配置
            bus-width = <4>;        //4bit总线
            cd-gpios = <&pio PF 6 6 1 3 0xffffffff>;       // 卡检测引脚
            ...
            status = "okay";        //默认启用
        };

USB

 *usb_port_type: usb mode. 0-device, 1-host, 2-otg.      #USB模式
 *usb_detect_type: usb hotplug detect mode. 0-none, 1-vbus/id detect, 2-id/dpdm detect.   #USB 热插拔检测方式
 *usb_id_gpio: gpio for id detect.
 *usb_det_vbus_gpio: gpio for id detect. gpio or "axp_ctrl";  
 *usb_wakeup_suspend：0-SUPER_STANDBY, 1-USB_STANDBY.    #USB 唤醒模式

usbc0:usbc0@0 {
            device_type = "usbc0";        
            usb_port_type = <0x2>;           //OTG模式
            ...
            status = "okay";
        };
        ...
        usbc1:usbc1@0 {
            ...
            status = "okay";         //HOST模式
        };

音频

Audio Driver Modules

codec:codec@0x05096000 {
            /* MIC and headphone gain setting */   //耳机和MIC
            mic1gain     = <0x1F>;                 //MIC1 增益 (最大 0x1F = 31)
            mic2gain     = <0x1F>;
            ... 
            status = "okay";      //默认启用
        };
        ...

显示

配置方法查看屏参配置文件

        lcd0: lcd0@01c0c000 {

        };

模拟键盘

使用 ADC 电压检测来模拟按键输入

/********************************************   
voltage        function
115            KEY_VOLUMEUP
114            KEY_VOLUMEDOWN
102            KEY_HOME
158            KEY_BACK
139            KEY_MENU 
*********************************************/
        keyboard {                        
            compatible = "allwinner,keyboard_1350mv";
            status = "disabled";    //默认禁用
            key_cnt = <5>;      //5个按键
            key0 = <115 115>;
            key1 = <236 114>;
            key2 = <361 102>;
            key3 = <477 158>;
            key4 = <591 139>;
        };

WIFI

wlan: wlan@0 {
    compatible    = "allwinner,sunxi-wlan";
    wlan_busnum   = <0x1>;     // 使用 SDIO1 总线
    wlan_power    = "axp803-dcdc1";   // 电源
    wlan_io_regulator = "axp803-dldo1"; 
    wlan_regon    = <&r_pio PL 5 1 ...>; // 模块电源控制脚
    wlan_hostwake = <&r_pio PL 6 6 ...>; // 模块唤醒主机 GPIO
    chip_en;
    power_en;
    status        = "okay";       //默认启用
};

蓝牙

//bt节点：蓝牙电源和复位引脚配置
bt: bt@0 {             
    compatible    = "allwinner,sunxi-bt";
    bt_power      = "axp803-dldo1"; // 电源
    bt_rst_n      = <&r_pio PL 2 1 ...>; // 复位引脚
    status = "okay";        //默认打开
};
//btlpm节点：蓝牙低功耗管理（LPM），指定 UART1 通信，GPIO 用于 wake/hostwake
btlpm: btlpm@0 {
    compatible  = "allwinner,sunxi-btlpm";
    uart_index  = <0x1>; // 使用 UART1
    bt_wake     = <&r_pio PL 4 1 ...>;
    bt_hostwake = <&r_pio PL 3 6 ...>;
    status      = "okay";
};

地址管理 (addr_mgt)

addr_mgt: addr_mgt@0 {                         //负责 WiFi/BT/Ethernet MAC 地址管理，避免冲突。
    compatible     = "allwinner,sunxi-addr_mgt";
    type_addr_wifi = <0x0>;          //0x0通常表示随机生成或者使用eFuse/OTP地址
    type_addr_bt   = <0x0>;
    type_addr_eth  = <0x0>;
    status         = "okay";
};

UART 串口

uart0: uart@05000000 {
    uart-supply = <&reg_dcdc1>; // 电源
};
uart1: uart@05000400 {
    uart1_type = <4>;  // 蓝牙 UART
    uart1_port = <1>;
    status = "okay";
};
uart2: uart@05000800 {
    uart2_type = <2>;  // 通用 UART
    uart2_port = <2>;
    use_dma = <2>;     // 启用 DMA
    status = "okay";
};
uart3: uart@05000c00 {
    pinctrl-0 = <&uart3_pins_a>;
    pinctrl-1 = <&uart3_pins_b>;
    uart3_type = <2>;
    status = "disabled";    
};
uart4: uart@05001000 {
    pinctrl-0 = <&uart4_pins_a>;
    pinctrl-1 = <&uart4_pins_b>;
    uart4_type = <2>;
    status = "disabled";
};

以太网

启动流程：上电供电 → 时钟初始化 → PHY 复位 → 驱动绑定 → eth0 就绪

gmac0: eth@05020000 {                //GMAC0 = 千兆以太网控制器
    compatible = "allwinner,sunxi-gmac";
    ...
    phy-mode = "rgmii";    // RGMII 接口
    tx-delay = <2>;        // TX 时钟延时
    rx-delay = <2>;        // RX 时钟延时
    phy-rst = <&pio PH 11 1 0 1 0>; // PHY 复位引脚
    gmac-power0 = "axp803-dldo2:2500000"; // 2.5V
    gmac-power1 = "axp803-eldo2:1800000"; // 1.8V
    gmac-power2 = "axp803-fldo1:1200000"; // 1.2V
    pinctrl-0 = <&gmac_pins_baijie>;
    status = "okay";
};

GPU

gpu: gpu@0x01800000 {
            gpu_idle = <0>;           //0：默认不进入idle低功耗状态； 1：GPU在空闲时会自动降频或关断
            dvfs_status = <1>;        //1:启用DVFS功能（动态电压频率调整）
            pll_rate = <504000>;      //默认工作频率
            independent_power = <0>;     //0:GPU和CPU共用电源域； 1:GPU独立电源控制（支持单独上电/关断）
            operating-points = <            //定义4个运行点（频率/电压对）
                 /* KHz   uV */
                504000 950000              //504MHz 0.95V
                472500 950000
                441000 950000              //只有频率变化，电压不随频率变化
                252000 950000
             >;               
             gpu-supply = <&reg_dcdc4>;
    };

CPU电源

&cpu0 {
    cpu-supply = <&reg_dcdc2>;              //CPU电源由DCDC2提供
};