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>

1 files changed, 166 insertions, 1 deletions

diff --git a/drivers/hwmon/f71805f.c b/drivers/hwmon/f71805f.c
index 8fe4d70d8f51..6f60715f34f8 100644
--- a/drivers/hwmon/f71805f.c
+++ b/drivers/hwmon/f71805f.c
@@ -127,6 +127,13 @@ superio_exit(int base)
 #define F71805F_REG_TEMP_HIGH(nr)       (0x54 + 2 * (nr))
 #define F71805F_REG_TEMP_HYST(nr)       (0x55 + 2 * (nr))
 #define F71805F_REG_TEMP_MODE           0x01
+/* pwm/fan pwmnr from 0 to 2, auto point apnr from 0 to 2 */
+/* map Fintek numbers to our numbers as follows: 9->0, 5->1, 1->2 */
+#define F71805F_REG_PWM_AUTO_POINT_TEMP(pwmnr, apnr) \
+                                        (0xA0 + 0x10 * (pwmnr) + (2 - (apnr)))
+#define F71805F_REG_PWM_AUTO_POINT_FAN(pwmnr, apnr) \
+                                        (0xA4 + 0x10 * (pwmnr) + \
+                                                2 * (2 - (apnr)))
 
 #define F71805F_REG_START               0x00
 /* status nr from 0 to 2 */
@@ -144,6 +151,11 @@ superio_exit(int base)
  * Data structures and manipulation thereof
  */
 
+struct f71805f_auto_point {
+        u8 temp[3];
+        u16 fan[3];
+};
+
 struct f71805f_data {
         unsigned short addr;
         const char *name;
@@ -170,6 +182,7 @@ struct f71805f_data {
         u8 temp_hyst[3];
         u8 temp_mode;
         unsigned long alarms;
+        struct f71805f_auto_point auto_points[3];
 };
 
 struct f71805f_sio_data {
@@ -312,7 +325,7 @@ static void f71805f_write16(struct f71805f_data *data, u8 reg, u16 val)
 static struct f71805f_data *f71805f_update_device(struct device *dev)
 {
         struct f71805f_data *data = dev_get_drvdata(dev);
-        int nr;
+        int nr, apnr;
 
         mutex_lock(&data->update_lock);
 
@@ -342,6 +355,18 @@ static struct f71805f_data *f71805f_update_device(struct device *dev)
                                               F71805F_REG_TEMP_HYST(nr));
                 }
                 data->temp_mode = f71805f_read8(data, F71805F_REG_TEMP_MODE);
+                for (nr = 0; nr < 3; nr++) {
+                        for (apnr = 0; apnr < 3; apnr++) {
+                                data->auto_points[nr].temp[apnr] =
+                                        f71805f_read8(data,
+                                        F71805F_REG_PWM_AUTO_POINT_TEMP(nr,
+                                                                        apnr));
+                                data->auto_points[nr].fan[apnr] =
+                                        f71805f_read16(data,
+                                        F71805F_REG_PWM_AUTO_POINT_FAN(nr,
+                                                                       apnr));
+                        }
+                }
 
                 data->last_limits = jiffies;
         }
@@ -705,6 +730,70 @@ static ssize_t set_pwm_freq(struct device *dev, struct device_attribute
         return count;
 }
 
+static ssize_t show_pwm_auto_point_temp(struct device *dev,
+                                        struct device_attribute *devattr,
+                                        char* buf)
+{
+        struct f71805f_data *data = dev_get_drvdata(dev);
+        struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
+        int pwmnr = attr->nr;
+        int apnr = attr->index;
+
+        return sprintf(buf, "%ld\n",
+                       temp_from_reg(data->auto_points[pwmnr].temp[apnr]));
+}
+
+static ssize_t set_pwm_auto_point_temp(struct device *dev,
+                                       struct device_attribute *devattr,
+                                       const char* buf, size_t count)
+{
+        struct f71805f_data *data = dev_get_drvdata(dev);
+        struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
+        int pwmnr = attr->nr;
+        int apnr = attr->index;
+        unsigned long val = simple_strtol(buf, NULL, 10);
+
+        mutex_lock(&data->update_lock);
+        data->auto_points[pwmnr].temp[apnr] = temp_to_reg(val);
+        f71805f_write8(data, F71805F_REG_PWM_AUTO_POINT_TEMP(pwmnr, apnr),
+                       data->auto_points[pwmnr].temp[apnr]);
+        mutex_unlock(&data->update_lock);
+
+        return count;
+}
+
+static ssize_t show_pwm_auto_point_fan(struct device *dev,
+                                       struct device_attribute *devattr,
+                                       char* buf)
+{
+        struct f71805f_data *data = dev_get_drvdata(dev);
+        struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
+        int pwmnr = attr->nr;
+        int apnr = attr->index;
+
+        return sprintf(buf, "%ld\n",
+                       fan_from_reg(data->auto_points[pwmnr].fan[apnr]));
+}
+
+static ssize_t set_pwm_auto_point_fan(struct device *dev,
+                                      struct device_attribute *devattr,
+                                      const char* buf, size_t count)
+{
+        struct f71805f_data *data = dev_get_drvdata(dev);
+        struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
+        int pwmnr = attr->nr;
+        int apnr = attr->index;
+        unsigned long val = simple_strtoul(buf, NULL, 10);
+
+        mutex_lock(&data->update_lock);
+        data->auto_points[pwmnr].fan[apnr] = fan_to_reg(val);
+        f71805f_write16(data, F71805F_REG_PWM_AUTO_POINT_FAN(pwmnr, apnr),
+                        data->auto_points[pwmnr].fan[apnr]);
+        mutex_unlock(&data->update_lock);
+
+        return count;
+}
+
 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
                          char *buf)
 {
@@ -932,6 +1021,63 @@ static SENSOR_DEVICE_ATTR(pwm3_freq, S_IRUGO | S_IWUSR,
                           show_pwm_freq, set_pwm_freq, 2);
 static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);
 
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
+                            0, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_fan, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
+                            0, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
+                            0, 1);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_fan, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
+                            0, 1);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
+                            0, 2);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_fan, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
+                            0, 2);
+
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
+                            1, 0);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_fan, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
+                            1, 0);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
+                            1, 1);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_fan, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
+                            1, 1);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
+                            1, 2);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_fan, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
+                            1, 2);
+
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
+                            2, 0);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_fan, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
+                            2, 0);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
+                            2, 1);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_fan, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
+                            2, 1);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
+                            2, 2);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_fan, S_IRUGO | S_IWUSR,
+                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
+                            2, 2);
+
 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
@@ -1014,6 +1160,25 @@ static struct attribute *f71805f_attributes[] = {
         &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
         &sensor_dev_attr_temp3_type.dev_attr.attr,
 
+        &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point1_fan.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point2_fan.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point3_fan.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point1_fan.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point2_fan.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point3_fan.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point1_fan.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point2_fan.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point3_fan.dev_attr.attr,
+
         &sensor_dev_attr_in0_alarm.dev_attr.attr,
         &sensor_dev_attr_in1_alarm.dev_attr.attr,
         &sensor_dev_attr_in2_alarm.dev_attr.attr,