6.15-stable review patch. If anyone has any objections, please let me know.
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From: Florin Leotescu florin.leotescu@nxp.com
[ Upstream commit 0429415a084a15466e87d504e8c2a502488184a5 ]
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.c... Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hwmon/emc2305.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/hwmon/emc2305.c b/drivers/hwmon/emc2305.c index 234c54956a4b..1dbe3f26467d 100644 --- a/drivers/hwmon/emc2305.c +++ b/drivers/hwmon/emc2305.c @@ -299,6 +299,12 @@ static int emc2305_set_single_tz(struct device *dev, int idx) 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); @@ -312,10 +318,10 @@ static int emc2305_set_single_tz(struct device *dev, int idx) } } 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; }