Commit 3d44a509 authored by Daniel Lezcano's avatar Daniel Lezcano
Browse files

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: default avatarZhang Rui <rui.zhang@intel.com>
Reviewed-by: default avatarAmit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200706105538.2159-1-daniel.lezcano@linaro.org
parent 514acd00

drivers/thermal/thermal_core.c

+51 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/thermal/thermal_core.h

+9 −0
Original line number Diff line number Diff line
@@ -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];

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