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Commit f1bbe618 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (it87) Support disabling fan control for all pwm control and chips 



On/Off mode is only supported for pwm controls 0-2, and not supported at all for
IT8603E/IT8623E. For pwm controls 3-6 and for IT8603E/IT8623E, SmartGuardian mode
is always enabled. Use it and set the pwm value to the maximum if fan control
is disabled.

Tested-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent c962024e

drivers/hwmon/it87.c

+31 −21
Original line number Diff line number Diff line
@@ -1030,18 +1030,19 @@ static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type, 
static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,

			  set_temp_type, 2);



/* 3 Fans */

/* 6 Fans */



static int pwm_mode(const struct it87_data *data, int nr)

{

	int ctrl = data->fan_main_ctrl & BIT(nr);

	if (data->type != it8603 && nr < 3 && !(data->fan_main_ctrl & BIT(nr)))

		return 0;				/* Full speed */

	if (data->pwm_ctrl[nr] & 0x80)

		return 2;				/* Automatic mode */

	if ((data->type == it8603 || nr >= 3) &&

	    data->pwm_duty[nr] == pwm_to_reg(data, 0xff))

		return 0;			/* Full speed */



	if (ctrl == 0 && data->type != it8603)		/* Full speed */

		return 0;

	if (data->pwm_ctrl[nr] & 0x80)			/* Automatic mode */

		return 2;

	else						/* Manual mode */

		return 1;

	return 1;				/* Manual mode */

}



static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
@@ -1242,13 +1243,10 @@ static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr, 
			return -EINVAL;

	}



	/* IT8603E does not have on/off mode */

	if (val == 0 && data->type == it8603)

		return -EINVAL;



	mutex_lock(&data->update_lock);



	if (val == 0) {

		if (nr < 3 && data->type != it8603) {

			int tmp;

			/* make sure the fan is on when in on/off mode */

			tmp = it87_read_value(data, IT87_REG_FAN_CTL);
@@ -1257,6 +1255,18 @@ static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr, 
			data->fan_main_ctrl &= ~BIT(nr);

			it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,

					 data->fan_main_ctrl);

		} else {

			/* No on/off mode, set maximum pwm value */

			data->pwm_duty[nr] = pwm_to_reg(data, 0xff);

			it87_write_value(data, IT87_REG_PWM_DUTY[nr],

					 data->pwm_duty[nr]);

			/* and set manual mode */

			data->pwm_ctrl[nr] = has_newer_autopwm(data) ?

					     data->pwm_temp_map[nr] :

					     data->pwm_duty[nr];

			it87_write_value(data, IT87_REG_PWM[nr],

					 data->pwm_ctrl[nr]);

		}

	} else {

		if (val == 1)				/* Manual mode */

			data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
@@ -1266,7 +1276,7 @@ static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr, 
			data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];

		it87_write_value(data, IT87_REG_PWM[nr], data->pwm_ctrl[nr]);



		if (data->type != it8603) {

		if (data->type != it8603 && nr < 3) {

			/* set SmartGuardian mode */

			data->fan_main_ctrl |= BIT(nr);

			it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,