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hwmon: (emc2305) Set initial PWM minimum value during probe based on thermal state 

Prevent the PWM value from being set to minimum when thermal zone
temperature exceeds any trip point during driver probe. Otherwise, the
PWM fan speed will remains at minimum speed and not respond to
temperature changes.

Signed-off-by: Florin Leotescu <florin.leotescu@nxp.com>
Link: https://lore.kernel.org/r/20250603113125.3175103-5-florin.leotescu@oss.nxp.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Florin Leotescu 2025-06-03 14:31:25 +03:00 committed by Guenter Roeck
parent ef8b1b4eb7
commit 0429415a08
1 changed files with 8 additions and 2 deletions
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10
drivers/hwmon/emc2305.c
View File

@ -317,6 +317,12 @@ static int emc2305_set_single_tz(struct device *dev, struct device_node *fan_nod
dev_err(dev, "Failed to register cooling device %s\n", emc2305_fan_name[idx]);
return PTR_ERR(data->cdev_data[cdev_idx].cdev);
}
if (data->cdev_data[cdev_idx].cur_state > 0)
/* Update pwm when temperature is above trips */
pwm = EMC2305_PWM_STATE2DUTY(data->cdev_data[cdev_idx].cur_state,
data->max_state, EMC2305_FAN_MAX);
/* Set minimal PWM speed. */
if (data->pwm_separate) {
ret = emc2305_set_pwm(dev, pwm, cdev_idx);
@ -330,10 +336,10 @@ static int emc2305_set_single_tz(struct device *dev, struct device_node *fan_nod
}
}
data->cdev_data[cdev_idx].cur_state =
EMC2305_PWM_DUTY2STATE(data->pwm_min[cdev_idx], data->max_state,
EMC2305_PWM_DUTY2STATE(pwm, data->max_state,
EMC2305_FAN_MAX);
data->cdev_data[cdev_idx].last_hwmon_state =
EMC2305_PWM_DUTY2STATE(data->pwm_min[cdev_idx], data->max_state,
EMC2305_PWM_DUTY2STATE(pwm, data->max_state,
EMC2305_FAN_MAX);
return 0;
}