camera上电时序

今天有空去研究camera的上电时序，对了，如果你喜欢文学，历史，哲学，可以关注公众号：二校五叔

1.高通平台对于camera的代码组织，大体上还是遵循Android的框架：
即上层应用和HAL层交互，高通平台在HAL层里面实现自己的一套管理策略；
在kernel中实现sensor的底层驱动；
对于最核心的sensor端的底层设置、ISP效果相关等代码则是单独进行了抽离，放在vendor中。

2.vendor中：
\vendor\qcom\proprietary\mm-camera\mm-camera2\media-controller\modules\sensors\sensor_libs\ov5648_q5v22e

下面这个结构体便是上电时序

static struct msm_sensor_power_setting ov5648_q5v22e_power_setting[] = {
	{
		.seq_type = SENSOR_GPIO,
		.seq_val = SENSOR_GPIO_STANDBY,
		.config_val = GPIO_OUT_LOW,
		.delay = 2,
	},
	{
		.seq_type = SENSOR_GPIO,
		.seq_val = SENSOR_GPIO_RESET,
		.config_val = GPIO_OUT_LOW,
		.delay = 2,
	},
	{
		.seq_type = SENSOR_VREG,
		.seq_val = CAM_VIO,
		.config_val = 0,
		.delay = 0,
	},
	{
		.seq_type = SENSOR_GPIO,
		.seq_val = SENSOR_GPIO_VANA,
		.config_val = GPIO_OUT_HIGH,
		.delay = 1,
	},
	{
		.seq_type = SENSOR_GPIO,
		.seq_val = SENSOR_GPIO_VDIG,
		.config_val = GPIO_OUT_HIGH,
		.delay = 5,
	},

	{
		.seq_type = SENSOR_GPIO,
		.seq_val = SENSOR_GPIO_STANDBY,
		.config_val = GPIO_OUT_HIGH,
		.delay = 10,
	},

	{
		.seq_type = SENSOR_GPIO,
		.seq_val = SENSOR_GPIO_RESET,
		.config_val = GPIO_OUT_HIGH,
		.delay = 5,
	},
	{
		.seq_type = SENSOR_CLK,
		.seq_val = SENSOR_CAM_MCLK,
		.config_val = 23880000,//24000000,//19200000,//23880000,
		.del