diff options
Diffstat (limited to 'include/linux/thermal.h')
| -rw-r--r-- | include/linux/thermal.h | 242 |
1 files changed, 200 insertions, 42 deletions
diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 1de8b9eb841..f7e11c7ea7d 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -25,10 +25,40 @@ #ifndef __THERMAL_H__ #define __THERMAL_H__ +#include <linux/of.h> #include <linux/idr.h> #include <linux/device.h> #include <linux/workqueue.h> +#define THERMAL_TRIPS_NONE -1 +#define THERMAL_MAX_TRIPS 12 +#define THERMAL_NAME_LENGTH 20 + +/* invalid cooling state */ +#define THERMAL_CSTATE_INVALID -1UL + +/* No upper/lower limit requirement */ +#define THERMAL_NO_LIMIT THERMAL_CSTATE_INVALID + +/* Unit conversion macros */ +#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \ + ((long)t-2732+5)/10 : ((long)t-2732-5)/10) +#define CELSIUS_TO_KELVIN(t) ((t)*10+2732) + +/* Adding event notification support elements */ +#define THERMAL_GENL_FAMILY_NAME "thermal_event" +#define THERMAL_GENL_VERSION 0x01 +#define THERMAL_GENL_MCAST_GROUP_NAME "thermal_mc_grp" + +/* Default Thermal Governor */ +#if defined(CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE) +#define DEFAULT_THERMAL_GOVERNOR "step_wise" +#elif defined(CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE) +#define DEFAULT_THERMAL_GOVERNOR "fair_share" +#elif defined(CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE) +#define DEFAULT_THERMAL_GOVERNOR "user_space" +#endif + struct thermal_zone_device; struct thermal_cooling_device; @@ -44,6 +74,38 @@ enum thermal_trip_type { THERMAL_TRIP_CRITICAL, }; +enum thermal_trend { + THERMAL_TREND_STABLE, /* temperature is stable */ + THERMAL_TREND_RAISING, /* temperature is raising */ + THERMAL_TREND_DROPPING, /* temperature is dropping */ + THERMAL_TREND_RAISE_FULL, /* apply highest cooling action */ + THERMAL_TREND_DROP_FULL, /* apply lowest cooling action */ +}; + +/* Events supported by Thermal Netlink */ +enum events { + THERMAL_AUX0, + THERMAL_AUX1, + THERMAL_CRITICAL, + THERMAL_DEV_FAULT, +}; + +/* attributes of thermal_genl_family */ +enum { + THERMAL_GENL_ATTR_UNSPEC, + THERMAL_GENL_ATTR_EVENT, + __THERMAL_GENL_ATTR_MAX, +}; +#define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1) + +/* commands supported by the thermal_genl_family */ +enum { + THERMAL_GENL_CMD_UNSPEC, + THERMAL_GENL_CMD_EVENT, + __THERMAL_GENL_CMD_MAX, +}; +#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1) + struct thermal_zone_device_ops { int (*bind) (struct thermal_zone_device *, struct thermal_cooling_device *); @@ -58,7 +120,16 @@ struct thermal_zone_device_ops { enum thermal_trip_type *); int (*get_trip_temp) (struct thermal_zone_device *, int, unsigned long *); + int (*set_trip_temp) (struct thermal_zone_device *, int, + unsigned long); + int (*get_trip_hyst) (struct thermal_zone_device *, int, + unsigned long *); + int (*set_trip_hyst) (struct thermal_zone_device *, int, + unsigned long); int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *); + int (*set_emul_temp) (struct thermal_zone_device *, unsigned long); + int (*get_trend) (struct thermal_zone_device *, int, + enum thermal_trend *); int (*notify) (struct thermal_zone_device *, int, enum thermal_trip_type); }; @@ -69,82 +140,169 @@ struct thermal_cooling_device_ops { int (*set_cur_state) (struct thermal_cooling_device *, unsigned long); }; -#define THERMAL_TRIPS_NONE -1 -#define THERMAL_MAX_TRIPS 12 -#define THERMAL_NAME_LENGTH 20 struct thermal_cooling_device { int id; char type[THERMAL_NAME_LENGTH]; struct device device; + struct device_node *np; void *devdata; - struct thermal_cooling_device_ops *ops; + const struct thermal_cooling_device_ops *ops; + bool updated; /* true if the cooling device does not need update */ + struct mutex lock; /* protect thermal_instances list */ + struct list_head thermal_instances; struct list_head node; }; -#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \ - ((long)t-2732+5)/10 : ((long)t-2732-5)/10) -#define CELSIUS_TO_KELVIN(t) ((t)*10+2732) - -#if defined(CONFIG_THERMAL_HWMON) -/* thermal zone devices with the same type share one hwmon device */ -struct thermal_hwmon_device { - char type[THERMAL_NAME_LENGTH]; - struct device *device; - int count; - struct list_head tz_list; - struct list_head node; -}; - -struct thermal_hwmon_attr { +struct thermal_attr { struct device_attribute attr; - char name[16]; + char name[THERMAL_NAME_LENGTH]; }; -#endif struct thermal_zone_device { int id; char type[THERMAL_NAME_LENGTH]; struct device device; + struct thermal_attr *trip_temp_attrs; + struct thermal_attr *trip_type_attrs; + struct thermal_attr *trip_hyst_attrs; void *devdata; int trips; - int tc1; - int tc2; int passive_delay; int polling_delay; + int temperature; int last_temperature; - bool passive; + int emul_temperature; + int passive; unsigned int forced_passive; struct thermal_zone_device_ops *ops; - struct list_head cooling_devices; + const struct thermal_zone_params *tzp; + struct thermal_governor *governor; + struct list_head thermal_instances; struct idr idr; - struct mutex lock; /* protect cooling devices list */ + struct mutex lock; /* protect thermal_instances list */ struct list_head node; struct delayed_work poll_queue; -#if defined(CONFIG_THERMAL_HWMON) - struct list_head hwmon_node; - struct thermal_hwmon_device *hwmon; - struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ - struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ -#endif }; -struct thermal_zone_device *thermal_zone_device_register(char *, int, void *, - struct - thermal_zone_device_ops - *, int tc1, int tc2, - int passive_freq, - int polling_freq); +/* Structure that holds thermal governor information */ +struct thermal_governor { + char name[THERMAL_NAME_LENGTH]; + int (*throttle)(struct thermal_zone_device *tz, int trip); + struct list_head governor_list; +}; + +/* Structure that holds binding parameters for a zone */ +struct thermal_bind_params { + struct thermal_cooling_device *cdev; + + /* + * This is a measure of 'how effectively these devices can + * cool 'this' thermal zone. The shall be determined by platform + * characterization. This is on a 'percentage' scale. + * See Documentation/thermal/sysfs-api.txt for more information. + */ + int weight; + + /* + * This is a bit mask that gives the binding relation between this + * thermal zone and cdev, for a particular trip point. + * See Documentation/thermal/sysfs-api.txt for more information. + */ + int trip_mask; + + /* + * This is an array of cooling state limits. Must have exactly + * 2 * thermal_zone.number_of_trip_points. It is an array consisting + * of tuples <lower-state upper-state> of state limits. Each trip + * will be associated with one state limit tuple when binding. + * A NULL pointer means <THERMAL_NO_LIMITS THERMAL_NO_LIMITS> + * on all trips. + */ + unsigned long *binding_limits; + int (*match) (struct thermal_zone_device *tz, + struct thermal_cooling_device *cdev); +}; + +/* Structure to define Thermal Zone parameters */ +struct thermal_zone_params { + char governor_name[THERMAL_NAME_LENGTH]; + + /* + * a boolean to indicate if the thermal to hwmon sysfs interface + * is required. when no_hwmon == false, a hwmon sysfs interface + * will be created. when no_hwmon == true, nothing will be done + */ + bool no_hwmon; + + int num_tbps; /* Number of tbp entries */ + struct thermal_bind_params *tbp; +}; + +struct thermal_genl_event { + u32 orig; + enum events event; +}; + +/* Function declarations */ +#ifdef CONFIG_THERMAL_OF +struct thermal_zone_device * +thermal_zone_of_sensor_register(struct device *dev, int id, + void *data, int (*get_temp)(void *, long *), + int (*get_trend)(void *, long *)); +void thermal_zone_of_sensor_unregister(struct device *dev, + struct thermal_zone_device *tz); +#else +static inline struct thermal_zone_device * +thermal_zone_of_sensor_register(struct device *dev, int id, + void *data, int (*get_temp)(void *, long *), + int (*get_trend)(void *, long *)) +{ + return NULL; +} + +static inline +void thermal_zone_of_sensor_unregister(struct device *dev, + struct thermal_zone_device *tz) +{ +} + +#endif +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); void thermal_zone_device_unregister(struct thermal_zone_device *); int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, - struct thermal_cooling_device *); + struct thermal_cooling_device *, + unsigned long, unsigned long); int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, struct thermal_cooling_device *); void thermal_zone_device_update(struct thermal_zone_device *); + struct thermal_cooling_device *thermal_cooling_device_register(char *, void *, - struct - thermal_cooling_device_ops - *); + const struct thermal_cooling_device_ops *); +struct thermal_cooling_device * +thermal_of_cooling_device_register(struct device_node *np, char *, void *, + const struct thermal_cooling_device_ops *); void thermal_cooling_device_unregister(struct thermal_cooling_device *); +struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name); +int thermal_zone_get_temp(struct thermal_zone_device *tz, unsigned long *temp); + +int get_tz_trend(struct thermal_zone_device *, int); +struct thermal_instance *get_thermal_instance(struct thermal_zone_device *, + struct thermal_cooling_device *, int); +void thermal_cdev_update(struct thermal_cooling_device *); +void thermal_notify_framework(struct thermal_zone_device *, int); + +#ifdef CONFIG_NET +extern int thermal_generate_netlink_event(struct thermal_zone_device *tz, + enum events event); +#else +static inline int thermal_generate_netlink_event(struct thermal_zone_device *tz, + enum events event) +{ + return 0; +} +#endif #endif /* __THERMAL_H__ */ |