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@xxxxxxxxx> --- drivers/thermal/thermal_sys.c | 42 ++++++++++++++++++++++++++++++++++++++--- 1 file changed, 39 insertions(+), 3 deletions(-) diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index a67c6c0..0948a60 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -454,10 +454,41 @@ passive_show(struct device *dev, struct device_attribute *attr, return sprintf(buf, "%d\n", tz->forced_passive); } +static ssize_t +policy_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret = -EINVAL; + struct thermal_zone_device *tz = to_thermal_zone(dev); + struct thermal_governor *gov; + + mutex_lock(&thermal_governor_lock); + + gov = __find_governor(buf); + if (!gov) + goto exit; + + tz->governor = gov; + ret = count; + +exit: + mutex_unlock(&thermal_governor_lock); + return ret; +} + +static ssize_t +policy_show(struct device *dev, struct device_attribute *devattr, char *buf) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + + return sprintf(buf, "%s\n", tz->governor->name); +} + static DEVICE_ATTR(type, 0444, type_show, NULL); static DEVICE_ATTR(temp, 0444, temp_show, NULL); static DEVICE_ATTR(mode, 0644, mode_show, mode_store); static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); +static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store); /* sys I/F for cooling device */ #define to_cooling_device(_dev) \ @@ -1512,10 +1543,14 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, passive = 1; } - if (!passive) - result = device_create_file(&tz->device, - &dev_attr_passive); + if (!passive) { + result = device_create_file(&tz->device, &dev_attr_passive); + if (result) + goto unregister; + } + /* Create policy attribute */ + result = device_create_file(&tz->device, &dev_attr_policy); if (result) goto unregister; @@ -1591,6 +1626,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) device_remove_file(&tz->device, &dev_attr_temp); if (tz->ops->get_mode) device_remove_file(&tz->device, &dev_attr_mode); + device_remove_file(&tz->device, &dev_attr_policy); remove_trip_attrs(tz); tz->governor = NULL; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html