hwmon: (it87) Expose the PWM/temperature mappings
Let the user read the PWM-to-temperature mappings. Until the trip
points are also exposed, this is essentially a way to know how the
BIOS has set things up. The ability to change the settings will be
added later, together with the trip points.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 49022bd..41b55a7 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -751,6 +751,59 @@
return count;
}
+static ssize_t show_pwm_temp_map(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+
+ struct it87_data *data = it87_update_device(dev);
+ int map;
+
+ if (data->pwm_temp_map[nr] < 3)
+ map = 1 << data->pwm_temp_map[nr];
+ else
+ map = 0; /* Should never happen */
+ return sprintf(buf, "%d\n", map);
+}
+static ssize_t set_pwm_temp_map(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+
+ struct it87_data *data = dev_get_drvdata(dev);
+ long val;
+ u8 reg;
+
+ if (strict_strtol(buf, 10, &val) < 0)
+ return -EINVAL;
+
+ switch (val) {
+ case (1 << 0):
+ reg = 0x00;
+ break;
+ case (1 << 1):
+ reg = 0x01;
+ break;
+ case (1 << 2):
+ reg = 0x02;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ mutex_lock(&data->update_lock);
+ data->pwm_temp_map[nr] = reg;
+ /* If we are in automatic mode, write the temp mapping immediately;
+ * otherwise, just store it for later use. */
+ if (data->pwm_ctrl[nr] & 0x80) {
+ data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
+ it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
+ }
+ mutex_unlock(&data->update_lock);
+ return count;
+}
#define show_fan_offset(offset) \
static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
@@ -771,7 +824,10 @@
show_pwm, set_pwm, offset - 1); \
static DEVICE_ATTR(pwm##offset##_freq, \
(offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
- show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));
+ show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
+static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
+ S_IRUGO, show_pwm_temp_map, set_pwm_temp_map, \
+ offset - 1);
show_pwm_offset(1);
show_pwm_offset(2);
@@ -995,6 +1051,9 @@
&dev_attr_pwm1_freq.attr,
&dev_attr_pwm2_freq.attr,
&dev_attr_pwm3_freq.attr,
+ &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
&dev_attr_vrm.attr,
&dev_attr_cpu0_vid.attr,
@@ -1268,7 +1327,9 @@
|| (err = device_create_file(dev,
&sensor_dev_attr_pwm1.dev_attr))
|| (err = device_create_file(dev,
- &dev_attr_pwm1_freq)))
+ &dev_attr_pwm1_freq))
+ || (err = device_create_file(dev,
+ &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr)))
goto ERROR4;
}
if (!(sio_data->skip_pwm & (1 << 1))) {
@@ -1277,7 +1338,9 @@
|| (err = device_create_file(dev,
&sensor_dev_attr_pwm2.dev_attr))
|| (err = device_create_file(dev,
- &dev_attr_pwm2_freq)))
+ &dev_attr_pwm2_freq))
+ || (err = device_create_file(dev,
+ &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr)))
goto ERROR4;
}
if (!(sio_data->skip_pwm & (1 << 2))) {
@@ -1286,7 +1349,9 @@
|| (err = device_create_file(dev,
&sensor_dev_attr_pwm3.dev_attr))
|| (err = device_create_file(dev,
- &dev_attr_pwm3_freq)))
+ &dev_attr_pwm3_freq))
+ || (err = device_create_file(dev,
+ &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr)))
goto ERROR4;
}
}