With knowledge of supported thermal policies from this attribute, it helps in setting the policy without failure from the available ones.
Signed-off-by: Sanjay Singh Rawat sanjay.rawat@linaro.org --- drivers/thermal/thermal_core.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 71b0ec0..6caefcd 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -772,6 +772,25 @@ policy_show(struct device *dev, struct device_attribute *devattr, char *buf) return sprintf(buf, "%s\n", tz->governor->name); }
+static ssize_t +available_policy_show(struct device *dev, struct device_attribute *devattr, + char *buf) +{ + ssize_t i = 0; + struct thermal_governor *temp; + struct thermal_zone_device *tz = to_thermal_zone(dev); + + mutex_lock(&tz->lock); + + list_for_each_entry(temp, &thermal_governor_list, governor_list) + i += sprintf(&buf[i], "%s ", temp->name); + + mutex_unlock(&tz->lock); + i += sprintf(&buf[i], "\n"); + + return i; +} + #ifdef CONFIG_THERMAL_EMULATION static ssize_t emul_temp_store(struct device *dev, struct device_attribute *attr, @@ -805,6 +824,7 @@ 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); +static DEVICE_ATTR(available_policy, S_IRUGO, available_policy_show, NULL);
/* sys I/F for cooling device */ #define to_cooling_device(_dev) \ @@ -1538,6 +1558,10 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, if (result) goto unregister;
+ result = device_create_file(&tz->device, &dev_attr_available_policy); + if (result) + goto unregister; + /* Update 'this' zone's governor information */ mutex_lock(&thermal_governor_lock);