hwmon/f71805f: Add temperature-tracking fan control mode
Add support for the "temperature mode" fan speed control. In this mode, the user can define 3 temperature/speed trip points, and the chip will set the speed automatically according to the temperature changes. Signed-off-by: Phil Endecott <kernel@chezphil.org> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
This commit is contained in:
Phil Endecott
Mark M. Hoffman
Родитель
158ce07564
Коммит
aba5073d3f
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@ -5,11 +5,11 @@ Supported chips:
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* Fintek F71805F/FG
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Prefix: 'f71805f'
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Addresses scanned: none, address read from Super I/O config space
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Datasheet: Provided by Fintek on request
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Datasheet: Available from the Fintek website
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* Fintek F71872F/FG
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Prefix: 'f71872f'
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Addresses scanned: none, address read from Super I/O config space
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Datasheet: Provided by Fintek on request
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Datasheet: Available from the Fintek website
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Author: Jean Delvare <khali@linux-fr.org>
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@ -128,7 +128,9 @@ it.
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When the PWM method is used, you can select the operating frequency,
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from 187.5 kHz (default) to 31 Hz. The best frequency depends on the
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fan model. As a rule of thumb, lower frequencies seem to give better
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control, but may generate annoying high-pitch noise. Fintek recommends
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control, but may generate annoying high-pitch noise. So a frequency just
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above the audible range, such as 25 kHz, may be a good choice; if this
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doesn't give you good linear control, try reducing it. Fintek recommends
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not going below 1 kHz, as the fan tachometers get confused by lower
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frequencies as well.
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@ -136,16 +138,23 @@ When the DC method is used, Fintek recommends not going below 5 V, which
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corresponds to a pwm value of 106 for the driver. The driver doesn't
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enforce this limit though.
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Three different fan control modes are supported:
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Three different fan control modes are supported; the mode number is written
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to the pwm<n>_enable file.
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* Manual mode
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You ask for a specific PWM duty cycle or DC voltage.
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* 1: Manual mode
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You ask for a specific PWM duty cycle or DC voltage by writing to the
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pwm<n> file.
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* Fan speed mode
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You ask for a specific fan speed. This mode assumes that pwm1
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corresponds to fan1, pwm2 to fan2 and pwm3 to fan3.
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* 2: Temperature mode
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You define 3 temperature/fan speed trip points using the
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pwm<n>_auto_point<m>_temp and _fan files. These define a staircase
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relationship between temperature and fan speed with two additional points
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interpolated between the values that you define. When the temperature
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is below auto_point1_temp the fan is switched off.
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* Temperature mode
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You define 3 temperature/fan speed trip points, and the fan speed is
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adjusted depending on the measured temperature, using interpolation.
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This mode is not yet supported by the driver.
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* 3: Fan speed mode
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You ask for a specific fan speed by writing to the fan<n>_target file.
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Both of the automatic modes require that pwm1 corresponds to fan1, pwm2 to
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fan2 and pwm3 to fan3. Temperature mode also requires that temp1 corresponds
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to pwm1 and fan1, etc.
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@ -127,6 +127,13 @@ superio_exit(int base)
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#define F71805F_REG_TEMP_HIGH(nr) (0x54 + 2 * (nr))
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#define F71805F_REG_TEMP_HYST(nr) (0x55 + 2 * (nr))
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#define F71805F_REG_TEMP_MODE 0x01
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/* pwm/fan pwmnr from 0 to 2, auto point apnr from 0 to 2 */
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/* map Fintek numbers to our numbers as follows: 9->0, 5->1, 1->2 */
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#define F71805F_REG_PWM_AUTO_POINT_TEMP(pwmnr, apnr) \
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(0xA0 + 0x10 * (pwmnr) + (2 - (apnr)))
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#define F71805F_REG_PWM_AUTO_POINT_FAN(pwmnr, apnr) \
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(0xA4 + 0x10 * (pwmnr) + \
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2 * (2 - (apnr)))
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#define F71805F_REG_START 0x00
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/* status nr from 0 to 2 */
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@ -144,6 +151,11 @@ superio_exit(int base)
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* Data structures and manipulation thereof
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*/
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struct f71805f_auto_point {
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u8 temp[3];
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u16 fan[3];
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};
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struct f71805f_data {
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unsigned short addr;
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const char *name;
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@ -170,6 +182,7 @@ struct f71805f_data {
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u8 temp_hyst[3];
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u8 temp_mode;
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unsigned long alarms;
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struct f71805f_auto_point auto_points[3];
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};
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struct f71805f_sio_data {
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@ -312,7 +325,7 @@ static void f71805f_write16(struct f71805f_data *data, u8 reg, u16 val)
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static struct f71805f_data *f71805f_update_device(struct device *dev)
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{
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struct f71805f_data *data = dev_get_drvdata(dev);
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int nr;
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int nr, apnr;
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mutex_lock(&data->update_lock);
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@ -342,6 +355,18 @@ static struct f71805f_data *f71805f_update_device(struct device *dev)
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F71805F_REG_TEMP_HYST(nr));
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}
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data->temp_mode = f71805f_read8(data, F71805F_REG_TEMP_MODE);
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for (nr = 0; nr < 3; nr++) {
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for (apnr = 0; apnr < 3; apnr++) {
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data->auto_points[nr].temp[apnr] =
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f71805f_read8(data,
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F71805F_REG_PWM_AUTO_POINT_TEMP(nr,
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apnr));
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data->auto_points[nr].fan[apnr] =
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f71805f_read16(data,
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F71805F_REG_PWM_AUTO_POINT_FAN(nr,
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apnr));
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}
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}
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data->last_limits = jiffies;
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}
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@ -705,6 +730,70 @@ static ssize_t set_pwm_freq(struct device *dev, struct device_attribute
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return count;
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}
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static ssize_t show_pwm_auto_point_temp(struct device *dev,
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struct device_attribute *devattr,
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char* buf)
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{
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struct f71805f_data *data = dev_get_drvdata(dev);
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struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
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int pwmnr = attr->nr;
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int apnr = attr->index;
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return sprintf(buf, "%ld\n",
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temp_from_reg(data->auto_points[pwmnr].temp[apnr]));
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}
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static ssize_t set_pwm_auto_point_temp(struct device *dev,
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struct device_attribute *devattr,
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const char* buf, size_t count)
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{
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struct f71805f_data *data = dev_get_drvdata(dev);
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struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
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int pwmnr = attr->nr;
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int apnr = attr->index;
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unsigned long val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->auto_points[pwmnr].temp[apnr] = temp_to_reg(val);
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f71805f_write8(data, F71805F_REG_PWM_AUTO_POINT_TEMP(pwmnr, apnr),
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data->auto_points[pwmnr].temp[apnr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_pwm_auto_point_fan(struct device *dev,
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struct device_attribute *devattr,
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char* buf)
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{
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struct f71805f_data *data = dev_get_drvdata(dev);
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struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
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int pwmnr = attr->nr;
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int apnr = attr->index;
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return sprintf(buf, "%ld\n",
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fan_from_reg(data->auto_points[pwmnr].fan[apnr]));
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}
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static ssize_t set_pwm_auto_point_fan(struct device *dev,
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struct device_attribute *devattr,
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const char* buf, size_t count)
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{
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struct f71805f_data *data = dev_get_drvdata(dev);
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struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
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int pwmnr = attr->nr;
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int apnr = attr->index;
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->auto_points[pwmnr].fan[apnr] = fan_to_reg(val);
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f71805f_write16(data, F71805F_REG_PWM_AUTO_POINT_FAN(pwmnr, apnr),
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data->auto_points[pwmnr].fan[apnr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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@ -932,6 +1021,63 @@ static SENSOR_DEVICE_ATTR(pwm3_freq, S_IRUGO | S_IWUSR,
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show_pwm_freq, set_pwm_freq, 2);
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static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);
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static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_temp, set_pwm_auto_point_temp,
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0, 0);
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static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_fan, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_fan, set_pwm_auto_point_fan,
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0, 0);
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static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_temp, set_pwm_auto_point_temp,
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0, 1);
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static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_fan, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_fan, set_pwm_auto_point_fan,
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0, 1);
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static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_temp, set_pwm_auto_point_temp,
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0, 2);
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static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_fan, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_fan, set_pwm_auto_point_fan,
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0, 2);
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static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_temp, set_pwm_auto_point_temp,
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1, 0);
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static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_fan, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_fan, set_pwm_auto_point_fan,
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1, 0);
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static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_temp, set_pwm_auto_point_temp,
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1, 1);
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static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_fan, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_fan, set_pwm_auto_point_fan,
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1, 1);
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static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_temp, set_pwm_auto_point_temp,
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1, 2);
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static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_fan, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_fan, set_pwm_auto_point_fan,
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1, 2);
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static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_temp, set_pwm_auto_point_temp,
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2, 0);
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static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_fan, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_fan, set_pwm_auto_point_fan,
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2, 0);
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static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_temp, set_pwm_auto_point_temp,
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2, 1);
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static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_fan, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_fan, set_pwm_auto_point_fan,
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2, 1);
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static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_temp, set_pwm_auto_point_temp,
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2, 2);
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static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_fan, S_IRUGO | S_IWUSR,
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show_pwm_auto_point_fan, set_pwm_auto_point_fan,
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2, 2);
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static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
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static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
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static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
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@ -1014,6 +1160,25 @@ static struct attribute *f71805f_attributes[] = {
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&sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
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&sensor_dev_attr_temp3_type.dev_attr.attr,
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&sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
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&sensor_dev_attr_pwm1_auto_point1_fan.dev_attr.attr,
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&sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
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&sensor_dev_attr_pwm1_auto_point2_fan.dev_attr.attr,
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&sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
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&sensor_dev_attr_pwm1_auto_point3_fan.dev_attr.attr,
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&sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
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&sensor_dev_attr_pwm2_auto_point1_fan.dev_attr.attr,
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&sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
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&sensor_dev_attr_pwm2_auto_point2_fan.dev_attr.attr,
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&sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
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&sensor_dev_attr_pwm2_auto_point3_fan.dev_attr.attr,
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&sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
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&sensor_dev_attr_pwm3_auto_point1_fan.dev_attr.attr,
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&sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
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&sensor_dev_attr_pwm3_auto_point2_fan.dev_attr.attr,
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&sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
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&sensor_dev_attr_pwm3_auto_point3_fan.dev_attr.attr,
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&sensor_dev_attr_in0_alarm.dev_attr.attr,
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&sensor_dev_attr_in1_alarm.dev_attr.attr,
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&sensor_dev_attr_in2_alarm.dev_attr.attr,
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