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authorDaniel Lezcano <daniel.lezcano@linaro.org>2020-07-06 12:55:35 +0200
committerDaniel Lezcano <daniel.lezcano@linaro.org>2020-07-07 15:55:20 +0200
commit3d44a509c1dafb75adfe218f022ad216885c135e (patch)
tree364a25f7bc0a939092b0bc7757ad1562bf05efe0 /drivers/thermal
parent514acd00f957afa9b2a1fd521b2f180a950ee5e3 (diff)
downloadlwn-3d44a509c1dafb75adfe218f022ad216885c135e.tar.gz
lwn-3d44a509c1dafb75adfe218f022ad216885c135e.zip
thermal: core: Add helpers to browse the cdev, tz and governor list
The cdev, tz and governor list, as well as their respective locks are statically defined in the thermal_core.c file. In order to give a sane access to these list, like browsing all the thermal zones or all the cooling devices, let's define a set of helpers where we pass a callback as a parameter to be called for each thermal entity. We keep the self-encapsulation and ensure the locks are correctly taken when looking at the list. Acked-by: Zhang Rui <rui.zhang@intel.com> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200706105538.2159-1-daniel.lezcano@linaro.org
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/thermal_core.c51
-rw-r--r--drivers/thermal/thermal_core.h9
2 files changed, 60 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 052343c59b0a..438edd173eed 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -681,6 +681,57 @@ void thermal_zone_device_rebind_exception(struct thermal_zone_device *tz,
mutex_unlock(&thermal_list_lock);
}
+int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *),
+ void *data)
+{
+ struct thermal_governor *gov;
+ int ret = 0;
+
+ mutex_lock(&thermal_governor_lock);
+ list_for_each_entry(gov, &thermal_governor_list, governor_list) {
+ ret = cb(gov, data);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&thermal_governor_lock);
+
+ return ret;
+}
+
+int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *,
+ void *), void *data)
+{
+ struct thermal_cooling_device *cdev;
+ int ret = 0;
+
+ mutex_lock(&thermal_list_lock);
+ list_for_each_entry(cdev, &thermal_cdev_list, node) {
+ ret = cb(cdev, data);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&thermal_list_lock);
+
+ return ret;
+}
+
+int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *),
+ void *data)
+{
+ struct thermal_zone_device *tz;
+ int ret = 0;
+
+ mutex_lock(&thermal_list_lock);
+ list_for_each_entry(tz, &thermal_tz_list, node) {
+ ret = cb(tz, data);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&thermal_list_lock);
+
+ return ret;
+}
+
void thermal_zone_device_unbind_exception(struct thermal_zone_device *tz,
const char *cdev_type, size_t size)
{
diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
index b1464b3a21e2..fc8990c22704 100644
--- a/drivers/thermal/thermal_core.h
+++ b/drivers/thermal/thermal_core.h
@@ -41,6 +41,15 @@ extern struct thermal_governor *__governor_thermal_table_end[];
__governor < __governor_thermal_table_end; \
__governor++)
+int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *),
+ void *);
+
+int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *,
+ void *), void *);
+
+int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *),
+ void *thermal_governor);
+
struct thermal_attr {
struct device_attribute attr;
char name[THERMAL_NAME_LENGTH];