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Commit c973c3bc authored by Javi Merino's avatar Javi Merino Committed by Eduardo Valentin
Browse files

thermal: Add a function to get the minimum power 



The thermal core already has a function to get the maximum power of a
cooling device: power_actor_get_max_power().  Add a function to get the
minimum power of a cooling device.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Reviewed-by: default avatarDaniel Kurtz <djkurtz@chromium.org>
Signed-off-by: default avatarJavi Merino <javi.merino@arm.com>
Signed-off-by: default avatarEduardo Valentin <edubezval@gmail.com>
parent eba4f88d

drivers/thermal/thermal_core.c

+28 −0
Original line number Original line Diff line number Diff line
@@ -1012,6 +1012,34 @@ int power_actor_get_max_power(struct thermal_cooling_device *cdev, 
	return cdev->ops->state2power(cdev, tz, 0, max_power);

	return cdev->ops->state2power(cdev, tz, 0, max_power);

}

}





/**

 * power_actor_get_min_power() - get the mainimum power that a cdev can consume

 * @cdev:	pointer to &thermal_cooling_device

 * @tz:		a valid thermal zone device pointer

 * @min_power:	pointer in which to store the minimum power

 *

 * Calculate the minimum power consumption in milliwatts that the

 * cooling device can currently consume and store it in @min_power.

 *

 * Return: 0 on success, -EINVAL if @cdev doesn't support the

 * power_actor API or -E* on other error.

 */

int power_actor_get_min_power(struct thermal_cooling_device *cdev,

			      struct thermal_zone_device *tz, u32 *min_power)

{

	unsigned long max_state;

	int ret;



	if (!cdev_is_power_actor(cdev))

		return -EINVAL;



	ret = cdev->ops->get_max_state(cdev, &max_state);

	if (ret)

		return ret;



	return cdev->ops->state2power(cdev, tz, max_state, min_power);

}



/**

/**

 * power_actor_set_power() - limit the maximum power that a cooling device can consume

 * power_actor_set_power() - limit the maximum power that a cooling device can consume

 * @cdev:	pointer to &thermal_cooling_device

 * @cdev:	pointer to &thermal_cooling_device

include/linux/thermal.h

+6 −0
Original line number Original line Diff line number Diff line
@@ -380,6 +380,8 @@ static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev) 




int power_actor_get_max_power(struct thermal_cooling_device *,

int power_actor_get_max_power(struct thermal_cooling_device *,

			      struct thermal_zone_device *tz, u32 *max_power);

			      struct thermal_zone_device *tz, u32 *max_power);

int power_actor_get_min_power(struct thermal_cooling_device *,

			      struct thermal_zone_device *tz, u32 *min_power);

int power_actor_set_power(struct thermal_cooling_device *,

int power_actor_set_power(struct thermal_cooling_device *,

			  struct thermal_instance *, u32);

			  struct thermal_instance *, u32);

struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,

struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
@@ -415,6 +417,10 @@ static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev) 
static inline int power_actor_get_max_power(struct thermal_cooling_device *cdev,

static inline int power_actor_get_max_power(struct thermal_cooling_device *cdev,

			      struct thermal_zone_device *tz, u32 *max_power)

			      struct thermal_zone_device *tz, u32 *max_power)

{ return 0; }

{ return 0; }

static inline int power_actor_get_min_power(struct thermal_cooling_device *cdev,

					    struct thermal_zone_device *tz,

					    u32 *min_power)

{ return -ENODEV; }

static inline int power_actor_set_power(struct thermal_cooling_device *cdev,

static inline int power_actor_set_power(struct thermal_cooling_device *cdev,

			  struct thermal_instance *tz, u32 power)

			  struct thermal_instance *tz, u32 power)

{ return 0; }

{ return 0; }