OV5640_REG_SC_PLL_CTRL1
ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1, 0xff,
ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL1, &temp1);