ov5648_read
ret = ov5648_read(sensor, address, &value);
ret = ov5648_read(sensor, regs[i], &value);
ret = ov5648_read(sensor, OV5648_EXPOSURE_CTRL_HH_REG, &exposure_hh);
ret = ov5648_read(sensor, OV5648_EXPOSURE_CTRL_H_REG, &exposure_h);
ret = ov5648_read(sensor, OV5648_EXPOSURE_CTRL_L_REG, &exposure_l);
ret = ov5648_read(sensor, OV5648_GAIN_CTRL_H_REG, &gain_h);
ret = ov5648_read(sensor, OV5648_GAIN_CTRL_L_REG, &gain_l);