OPT4060_CTRL_CONV_TIME_MASK
reg |= FIELD_PREP(OPT4060_CTRL_CONV_TIME_MASK, chip->int_time);
regval = FIELD_PREP(OPT4060_CTRL_CONV_TIME_MASK, chip->int_time);
OPT4060_CTRL_CONV_TIME_MASK, regval);