LGM_PWM_FAN_DC_MSK
duty = FIELD_GET(LGM_PWM_FAN_DC_MSK, val);
ret = regmap_update_bits(pc->regmap, LGM_PWM_FAN_CON0, LGM_PWM_FAN_DC_MSK,
FIELD_PREP(LGM_PWM_FAN_DC_MSK, val));