高通平台Camera Dtsi解析

参考文件：Documentation/devicetree/bindings/media/video/msm-cam-cci.txt

qcom,cam-sensor@0 {
    /*摄像头唯一区分标志，添加新的camera，该ID顺次加1，通过该ID会与camera_config.xml里的ID匹配，这样才会去加载该ID对应模组的驱动。*/
    cell-index = <0>;
    /*匹配节点，驱动和设备的compatible属性相同时，才会调用probe函数。*/
    compatible = "qcom,cam-sensor";
    /*只要配置成唯一即可，一般是从0开始往下顺延, 一般配置为Sensor I2C Slave address*/
    reg = <0x0>;
    /*硬件csi phy配置，用于接收传感器数据的csiphy、csid核心实例可以配置的值：0,1,2
    这个值的确认就看原理图连的是哪一路的CSI，连的是哪一路就设置成几。*/
    csiphy-sd-index = <0>;
    /*欧拉角pitch、yaw，roll，三维视角*/
    /*旋转角度*/
    sensor-position-roll = <90>;
    /*俯仰角度*/
    sensor-position-pitch = <0>;
    /*偏航角度*/
    sensor-position-yaw = <180>;
    /*摄像头供电，LDO电源配置*/
    cam_vio-supply = <&pm8150_1_s4>;
    cam_bob-supply = <&pm8150_1_s4>;
    cam_vana-supply = <&pm8150_1_s4>;
    cam_vdig-supply = <&pm8150_1_s4>;
    cam_clk-supply = <&titan_top_gdsc>;
    /*ldo 电源对应的regulator名称*/
    regulator-names = "cam_vio", "cam_vana", "cam_vdig",
        "cam_clk", "cam_bob";
    /*gpio 配置*/
    gpios = <&tlmm 13 0>,
        <&tlmm 21 0>;
    /*reset gpio 索引 id*/
    gpio-reset = <1>;
    /*gpio对应的索引数字*/
    gpio-req-tbl-num = <0 1>;
    /*gpio默认状态，默认输出高/低电平*/
    gpio-req-tbl-flags = <1 0>;
    /*gpio名称*/
    gpio-req-tbl-label = "CAMIF_MCLK0",
                "CAM_RESET0";
    /*
    传感器模式：
    0 -> back camera 2D
    1 -> front camera 2D
    2 -> back camera 3D
    3 -> back camera int 3D
    */
    sensor-mode = <0>;
    /*
    sensor使用的master id。
    可选值：
    0 -> MASTER 0
    1 -> MASTER 1
    需要看原理图，看下对应摄像头用的是哪一路的I2C，如果配置不对，I2C不通。
    */
    cci-master = <0>;
    status = "ok";
    /*时钟配置*/
    clocks = <&clock_camcc CAM_CC_MCLK0_CLK>;
    clock-names = "cam_clk";
    clock-cntl-level = "turbo";
    clock-rates = <24000000>;
};