thermal: extend the cooling device API to include power information
Add three optional callbacks to the cooling device interface to allow
them to express power. In addition to the callbacks, add helpers to
identify cooling devices that implement the power cooling device API.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index edf9d53..bf3c55f 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -63,6 +63,7 @@
struct thermal_zone_device;
struct thermal_cooling_device;
+struct thermal_instance;
enum thermal_device_mode {
THERMAL_DEVICE_DISABLED = 0,
@@ -116,6 +117,12 @@
int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
+ int (*get_requested_power)(struct thermal_cooling_device *,
+ struct thermal_zone_device *, u32 *);
+ int (*state2power)(struct thermal_cooling_device *,
+ struct thermal_zone_device *, unsigned long, u32 *);
+ int (*power2state)(struct thermal_cooling_device *,
+ struct thermal_zone_device *, u32, unsigned long *);
};
struct thermal_cooling_device {
@@ -331,6 +338,16 @@
#endif
#if IS_ENABLED(CONFIG_THERMAL)
+static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
+{
+ return cdev->ops->get_requested_power && cdev->ops->state2power &&
+ cdev->ops->power2state;
+}
+
+int power_actor_get_max_power(struct thermal_cooling_device *,
+ struct thermal_zone_device *tz, u32 *max_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,
void *, struct thermal_zone_device_ops *,
const struct thermal_zone_params *, int, int);
@@ -359,6 +376,14 @@
void thermal_cdev_update(struct thermal_cooling_device *);
void thermal_notify_framework(struct thermal_zone_device *, int);
#else
+static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
+{ return false; }
+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_set_power(struct thermal_cooling_device *cdev,
+ struct thermal_instance *tz, u32 power)
+{ return 0; }
static inline struct thermal_zone_device *thermal_zone_device_register(
const char *type, int trips, int mask, void *devdata,
struct thermal_zone_device_ops *ops,