硬件原理图

CAM_GPIO是摄像头电源控制引脚，连接芯片GPIO4_C2
CAM_LEDON是摄像头led灯控制引脚，连接芯片GPIO4_C3

编写设备树

/ {ext_cam_clk: external-camera-clock {compatible = "fixed-clock";clock-frequency = <25000000>;clock-output-names = "CLK_CAMERA_25MHZ";#clock-cells = <0>;};
}；&pinctrl {camera {ov5647_default_pin: ov5647-default-pin {rockchip,pins =<4 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>,<4 RK_PC3 RK_FUNC_GPIO &pcfg_pull_up>;};ov5647_sleep_pin: ov5647-sleep-pin {rockchip,pins =//<4 RK_PB2