OV2740_REG_ISP_CTRL01
ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, &isp_ctrl01);
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1,
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, isp_ctrl01);