v4.19.13 snapshot.
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
new file mode 100644
index 0000000..5f4705f
--- /dev/null
+++ b/include/linux/thermal.h
@@ -0,0 +1,545 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * thermal.h ($Revision: 0 $)
+ *
+ * Copyright (C) 2008 Intel Corp
+ * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
+ * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
+ */
+
+#ifndef __THERMAL_H__
+#define __THERMAL_H__
+
+#include <linux/of.h>
+#include <linux/idr.h>
+#include <linux/device.h>
+#include <linux/sysfs.h>
+#include <linux/workqueue.h>
+#include <uapi/linux/thermal.h>
+
+#define THERMAL_TRIPS_NONE -1
+#define THERMAL_MAX_TRIPS 12
+
+/* invalid cooling state */
+#define THERMAL_CSTATE_INVALID -1UL
+
+/* No upper/lower limit requirement */
+#define THERMAL_NO_LIMIT ((u32)~0)
+
+/* Default weight of a bound cooling device */
+#define THERMAL_WEIGHT_DEFAULT 0
+
+/* use value, which < 0K, to indicate an invalid/uninitialized temperature */
+#define THERMAL_TEMP_INVALID -274000
+
+/* Unit conversion macros */
+#define DECI_KELVIN_TO_CELSIUS(t) ({ \
+ long _t = (t); \
+ ((_t-2732 >= 0) ? (_t-2732+5)/10 : (_t-2732-5)/10); \
+})
+#define CELSIUS_TO_DECI_KELVIN(t) ((t)*10+2732)
+#define DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, off) (((t) - (off)) * 100)
+#define DECI_KELVIN_TO_MILLICELSIUS(t) DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, 2732)
+#define MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, off) (((t) / 100) + (off))
+#define MILLICELSIUS_TO_DECI_KELVIN(t) MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, 2732)
+
+/* 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"
+#elif defined(CONFIG_THERMAL_DEFAULT_GOV_POWER_ALLOCATOR)
+#define DEFAULT_THERMAL_GOVERNOR "power_allocator"
+#endif
+
+struct thermal_zone_device;
+struct thermal_cooling_device;
+struct thermal_instance;
+
+enum thermal_device_mode {
+ THERMAL_DEVICE_DISABLED = 0,
+ THERMAL_DEVICE_ENABLED,
+};
+
+enum thermal_trip_type {
+ THERMAL_TRIP_ACTIVE = 0,
+ THERMAL_TRIP_PASSIVE,
+ THERMAL_TRIP_HOT,
+ 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 */
+};
+
+/* Thermal notification reason */
+enum thermal_notify_event {
+ THERMAL_EVENT_UNSPECIFIED, /* Unspecified event */
+ THERMAL_EVENT_TEMP_SAMPLE, /* New Temperature sample */
+ THERMAL_TRIP_VIOLATED, /* TRIP Point violation */
+ THERMAL_TRIP_CHANGED, /* TRIP Point temperature changed */
+ THERMAL_DEVICE_DOWN, /* Thermal device is down */
+ THERMAL_DEVICE_UP, /* Thermal device is up after a down event */
+ THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */
+ THERMAL_TABLE_CHANGED, /* Thermal table(s) changed */
+};
+
+struct thermal_zone_device_ops {
+ int (*bind) (struct thermal_zone_device *,
+ struct thermal_cooling_device *);
+ int (*unbind) (struct thermal_zone_device *,
+ struct thermal_cooling_device *);
+ int (*get_temp) (struct thermal_zone_device *, int *);
+ int (*set_trips) (struct thermal_zone_device *, int, int);
+ int (*get_mode) (struct thermal_zone_device *,
+ enum thermal_device_mode *);
+ int (*set_mode) (struct thermal_zone_device *,
+ enum thermal_device_mode);
+ int (*get_trip_type) (struct thermal_zone_device *, int,
+ enum thermal_trip_type *);
+ int (*get_trip_temp) (struct thermal_zone_device *, int, int *);
+ int (*set_trip_temp) (struct thermal_zone_device *, int, int);
+ int (*get_trip_hyst) (struct thermal_zone_device *, int, int *);
+ int (*set_trip_hyst) (struct thermal_zone_device *, int, int);
+ int (*get_crit_temp) (struct thermal_zone_device *, int *);
+ int (*set_emul_temp) (struct thermal_zone_device *, int);
+ int (*get_trend) (struct thermal_zone_device *, int,
+ enum thermal_trend *);
+ int (*notify) (struct thermal_zone_device *, int,
+ enum thermal_trip_type);
+};
+
+struct thermal_cooling_device_ops {
+ 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 {
+ int id;
+ char type[THERMAL_NAME_LENGTH];
+ struct device device;
+ struct device_node *np;
+ void *devdata;
+ void *stats;
+ 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;
+};
+
+struct thermal_attr {
+ struct device_attribute attr;
+ char name[THERMAL_NAME_LENGTH];
+};
+
+/**
+ * struct thermal_zone_device - structure for a thermal zone
+ * @id: unique id number for each thermal zone
+ * @type: the thermal zone device type
+ * @device: &struct device for this thermal zone
+ * @trip_temp_attrs: attributes for trip points for sysfs: trip temperature
+ * @trip_type_attrs: attributes for trip points for sysfs: trip type
+ * @trip_hyst_attrs: attributes for trip points for sysfs: trip hysteresis
+ * @devdata: private pointer for device private data
+ * @trips: number of trip points the thermal zone supports
+ * @trips_disabled; bitmap for disabled trips
+ * @passive_delay: number of milliseconds to wait between polls when
+ * performing passive cooling.
+ * @polling_delay: number of milliseconds to wait between polls when
+ * checking whether trip points have been crossed (0 for
+ * interrupt driven systems)
+ * @temperature: current temperature. This is only for core code,
+ * drivers should use thermal_zone_get_temp() to get the
+ * current temperature
+ * @last_temperature: previous temperature read
+ * @emul_temperature: emulated temperature when using CONFIG_THERMAL_EMULATION
+ * @passive: 1 if you've crossed a passive trip point, 0 otherwise.
+ * @prev_low_trip: the low current temperature if you've crossed a passive
+ trip point.
+ * @prev_high_trip: the above current temperature if you've crossed a
+ passive trip point.
+ * @forced_passive: If > 0, temperature at which to switch on all ACPI
+ * processor cooling devices. Currently only used by the
+ * step-wise governor.
+ * @need_update: if equals 1, thermal_zone_device_update needs to be invoked.
+ * @ops: operations this &thermal_zone_device supports
+ * @tzp: thermal zone parameters
+ * @governor: pointer to the governor for this thermal zone
+ * @governor_data: private pointer for governor data
+ * @thermal_instances: list of &struct thermal_instance of this thermal zone
+ * @ida: &struct ida to generate unique id for this zone's cooling
+ * devices
+ * @lock: lock to protect thermal_instances list
+ * @node: node in thermal_tz_list (in thermal_core.c)
+ * @poll_queue: delayed work for polling
+ * @notify_event: Last notification event
+ */
+struct thermal_zone_device {
+ int id;
+ char type[THERMAL_NAME_LENGTH];
+ struct device device;
+ struct attribute_group trips_attribute_group;
+ struct thermal_attr *trip_temp_attrs;
+ struct thermal_attr *trip_type_attrs;
+ struct thermal_attr *trip_hyst_attrs;
+ void *devdata;
+ int trips;
+ unsigned long trips_disabled; /* bitmap for disabled trips */
+ int passive_delay;
+ int polling_delay;
+ int temperature;
+ int last_temperature;
+ int emul_temperature;
+ int passive;
+ int prev_low_trip;
+ int prev_high_trip;
+ unsigned int forced_passive;
+ atomic_t need_update;
+ struct thermal_zone_device_ops *ops;
+ struct thermal_zone_params *tzp;
+ struct thermal_governor *governor;
+ void *governor_data;
+ struct list_head thermal_instances;
+ struct ida ida;
+ struct mutex lock;
+ struct list_head node;
+ struct delayed_work poll_queue;
+ enum thermal_notify_event notify_event;
+};
+
+/**
+ * struct thermal_governor - structure that holds thermal governor information
+ * @name: name of the governor
+ * @bind_to_tz: callback called when binding to a thermal zone. If it
+ * returns 0, the governor is bound to the thermal zone,
+ * otherwise it fails.
+ * @unbind_from_tz: callback called when a governor is unbound from a
+ * thermal zone.
+ * @throttle: callback called for every trip point even if temperature is
+ * below the trip point temperature
+ * @governor_list: node in thermal_governor_list (in thermal_core.c)
+ */
+struct thermal_governor {
+ char name[THERMAL_NAME_LENGTH];
+ int (*bind_to_tz)(struct thermal_zone_device *tz);
+ void (*unbind_from_tz)(struct thermal_zone_device *tz);
+ 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. It shall be determined by
+ * platform characterization. This value is relative to the
+ * rest of the weights so a cooling device whose weight is
+ * double that of another cooling device is twice as
+ * effective. 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;
+
+ /*
+ * Sustainable power (heat) that this thermal zone can dissipate in
+ * mW
+ */
+ u32 sustainable_power;
+
+ /*
+ * Proportional parameter of the PID controller when
+ * overshooting (i.e., when temperature is below the target)
+ */
+ s32 k_po;
+
+ /*
+ * Proportional parameter of the PID controller when
+ * undershooting
+ */
+ s32 k_pu;
+
+ /* Integral parameter of the PID controller */
+ s32 k_i;
+
+ /* Derivative parameter of the PID controller */
+ s32 k_d;
+
+ /* threshold below which the error is no longer accumulated */
+ s32 integral_cutoff;
+
+ /*
+ * @slope: slope of a linear temperature adjustment curve.
+ * Used by thermal zone drivers.
+ */
+ int slope;
+ /*
+ * @offset: offset of a linear temperature adjustment curve.
+ * Used by thermal zone drivers (default 0).
+ */
+ int offset;
+};
+
+struct thermal_genl_event {
+ u32 orig;
+ enum events event;
+};
+
+/**
+ * struct thermal_zone_of_device_ops - scallbacks for handling DT based zones
+ *
+ * Mandatory:
+ * @get_temp: a pointer to a function that reads the sensor temperature.
+ *
+ * Optional:
+ * @get_trend: a pointer to a function that reads the sensor temperature trend.
+ * @set_trips: a pointer to a function that sets a temperature window. When
+ * this window is left the driver must inform the thermal core via
+ * thermal_zone_device_update.
+ * @set_emul_temp: a pointer to a function that sets sensor emulated
+ * temperature.
+ * @set_trip_temp: a pointer to a function that sets the trip temperature on
+ * hardware.
+ */
+struct thermal_zone_of_device_ops {
+ int (*get_temp)(void *, int *);
+ int (*get_trend)(void *, int, enum thermal_trend *);
+ int (*set_trips)(void *, int, int);
+ int (*set_emul_temp)(void *, int);
+ int (*set_trip_temp)(void *, int, int);
+};
+
+/**
+ * struct thermal_trip - representation of a point in temperature domain
+ * @np: pointer to struct device_node that this trip point was created from
+ * @temperature: temperature value in miliCelsius
+ * @hysteresis: relative hysteresis in miliCelsius
+ * @type: trip point type
+ */
+
+struct thermal_trip {
+ struct device_node *np;
+ int temperature;
+ int hysteresis;
+ enum thermal_trip_type type;
+};
+
+/* Function declarations */
+#ifdef CONFIG_THERMAL_OF
+struct thermal_zone_device *
+thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
+ const struct thermal_zone_of_device_ops *ops);
+void thermal_zone_of_sensor_unregister(struct device *dev,
+ struct thermal_zone_device *tz);
+struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
+ struct device *dev, int id, void *data,
+ const struct thermal_zone_of_device_ops *ops);
+void devm_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,
+ const struct thermal_zone_of_device_ops *ops)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+static inline
+void thermal_zone_of_sensor_unregister(struct device *dev,
+ struct thermal_zone_device *tz)
+{
+}
+
+static inline struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
+ struct device *dev, int id, void *data,
+ const struct thermal_zone_of_device_ops *ops)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+static inline
+void devm_thermal_zone_of_sensor_unregister(struct device *dev,
+ struct thermal_zone_device *tz)
+{
+}
+
+#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_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,
+ void *, struct thermal_zone_device_ops *,
+ 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 *,
+ unsigned long, unsigned long,
+ unsigned int);
+int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
+ struct thermal_cooling_device *);
+void thermal_zone_device_update(struct thermal_zone_device *,
+ enum thermal_notify_event);
+void thermal_zone_set_trips(struct thermal_zone_device *);
+
+struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
+ 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, int *temp);
+int thermal_zone_get_slope(struct thermal_zone_device *tz);
+int thermal_zone_get_offset(struct thermal_zone_device *tz);
+
+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);
+#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_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; }
+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,
+ struct thermal_zone_params *tzp,
+ int passive_delay, int polling_delay)
+{ return ERR_PTR(-ENODEV); }
+static inline void thermal_zone_device_unregister(
+ struct thermal_zone_device *tz)
+{ }
+static inline int thermal_zone_bind_cooling_device(
+ struct thermal_zone_device *tz, int trip,
+ struct thermal_cooling_device *cdev,
+ unsigned long upper, unsigned long lower,
+ unsigned int weight)
+{ return -ENODEV; }
+static inline int thermal_zone_unbind_cooling_device(
+ struct thermal_zone_device *tz, int trip,
+ struct thermal_cooling_device *cdev)
+{ return -ENODEV; }
+static inline void thermal_zone_device_update(struct thermal_zone_device *tz,
+ enum thermal_notify_event event)
+{ }
+static inline void thermal_zone_set_trips(struct thermal_zone_device *tz)
+{ }
+static inline struct thermal_cooling_device *
+thermal_cooling_device_register(char *type, void *devdata,
+ const struct thermal_cooling_device_ops *ops)
+{ return ERR_PTR(-ENODEV); }
+static inline struct thermal_cooling_device *
+thermal_of_cooling_device_register(struct device_node *np,
+ char *type, void *devdata, const struct thermal_cooling_device_ops *ops)
+{ return ERR_PTR(-ENODEV); }
+static inline void thermal_cooling_device_unregister(
+ struct thermal_cooling_device *cdev)
+{ }
+static inline struct thermal_zone_device *thermal_zone_get_zone_by_name(
+ const char *name)
+{ return ERR_PTR(-ENODEV); }
+static inline int thermal_zone_get_temp(
+ struct thermal_zone_device *tz, int *temp)
+{ return -ENODEV; }
+static inline int thermal_zone_get_slope(
+ struct thermal_zone_device *tz)
+{ return -ENODEV; }
+static inline int thermal_zone_get_offset(
+ struct thermal_zone_device *tz)
+{ return -ENODEV; }
+static inline int get_tz_trend(struct thermal_zone_device *tz, int trip)
+{ return -ENODEV; }
+static inline struct thermal_instance *
+get_thermal_instance(struct thermal_zone_device *tz,
+ struct thermal_cooling_device *cdev, int trip)
+{ return ERR_PTR(-ENODEV); }
+static inline void thermal_cdev_update(struct thermal_cooling_device *cdev)
+{ }
+static inline void thermal_notify_framework(struct thermal_zone_device *tz,
+ int trip)
+{ }
+#endif /* CONFIG_THERMAL */
+
+#if defined(CONFIG_NET) && IS_ENABLED(CONFIG_THERMAL)
+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__ */