MLXREG_FAN_PWM_DUTY2STATE
pwm->last_hwmon_state = MLXREG_FAN_PWM_DUTY2STATE(val);
*state = MLXREG_FAN_PWM_DUTY2STATE(regval);
pwm->last_hwmon_state = MLXREG_FAN_PWM_DUTY2STATE(MLXREG_FAN_MIN_DUTY);