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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: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Javi Merino 2015-09-14 14:23:50 +01:00 committed by Eduardo Valentin
parent eba4f88d5a
commit c973c3bcec
2 changed files with 34 additions and 0 deletions
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28
drivers/thermal/thermal_core.c
View File

@ -1012,6 +1012,34 @@ int power_actor_get_max_power(struct thermal_cooling_device *cdev,
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
* @cdev: pointer to &thermal_cooling_device

6
include/linux/thermal.h
View File

@ -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 *,
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 *,
struct thermal_instance *, u32);
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,
struct thermal_zone_device *tz, u32 *max_power)
{ 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,
struct thermal_instance *tz, u32 power)
{ return 0; }