ov9282_read_reg
ret = ov9282_read_reg(ov9282, OV9282_REG_ID, 2, &val);
int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_2, 1,
int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_1, 1,
ret = ov9282_read_reg(ov9282, OV9282_REG_OUTPUT_ENABLE6, 1, ¤t_val);