Thermal: Add a policy sysfs attribute
This patch adds a policy sysfs attribute to a thermal zone. This attribute denotes the throttling governor used for the zone. This is a RW attribute. Signed-off-by: Durgadoss R <durgadoss.r@intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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@ -454,10 +454,41 @@ passive_show(struct device *dev, struct device_attribute *attr,
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return sprintf(buf, "%d\n", tz->forced_passive);
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return sprintf(buf, "%d\n", tz->forced_passive);
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}
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}
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static ssize_t
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policy_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int ret = -EINVAL;
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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struct thermal_governor *gov;
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mutex_lock(&thermal_governor_lock);
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gov = __find_governor(buf);
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if (!gov)
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goto exit;
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tz->governor = gov;
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ret = count;
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exit:
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mutex_unlock(&thermal_governor_lock);
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return ret;
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}
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static ssize_t
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policy_show(struct device *dev, struct device_attribute *devattr, char *buf)
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{
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struct thermal_zone_device *tz = to_thermal_zone(dev);
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return sprintf(buf, "%s\n", tz->governor->name);
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}
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static DEVICE_ATTR(type, 0444, type_show, NULL);
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static DEVICE_ATTR(type, 0444, type_show, NULL);
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static DEVICE_ATTR(temp, 0444, temp_show, NULL);
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static DEVICE_ATTR(temp, 0444, temp_show, NULL);
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static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
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static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
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static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store);
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static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store);
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static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store);
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/* sys I/F for cooling device */
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/* sys I/F for cooling device */
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#define to_cooling_device(_dev) \
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#define to_cooling_device(_dev) \
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@ -1509,10 +1540,14 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
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passive = 1;
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passive = 1;
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}
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}
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if (!passive)
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if (!passive) {
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result = device_create_file(&tz->device,
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result = device_create_file(&tz->device, &dev_attr_passive);
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&dev_attr_passive);
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if (result)
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goto unregister;
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}
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/* Create policy attribute */
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result = device_create_file(&tz->device, &dev_attr_policy);
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if (result)
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if (result)
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goto unregister;
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goto unregister;
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@ -1588,6 +1623,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
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device_remove_file(&tz->device, &dev_attr_temp);
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device_remove_file(&tz->device, &dev_attr_temp);
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if (tz->ops->get_mode)
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if (tz->ops->get_mode)
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device_remove_file(&tz->device, &dev_attr_mode);
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device_remove_file(&tz->device, &dev_attr_mode);
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device_remove_file(&tz->device, &dev_attr_policy);
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remove_trip_attrs(tz);
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remove_trip_attrs(tz);
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tz->governor = NULL;
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tz->governor = NULL;
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