linux/drivers/thermal/thermal_helpers.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  thermal_helpers.c - helper functions to handle thermal devices
 *
 *  Copyright (C) 2016 Eduardo Valentin <[email protected]>
 *
 *  Highly based on original thermal_core.c
 *  Copyright (C) 2008 Intel Corp
 *  Copyright (C) 2008 Zhang Rui <[email protected]>
 *  Copyright (C) 2008 Sujith Thomas <[email protected]>
 */

#define pr_fmt(fmt) …

#include <linux/device.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/sysfs.h>

#include "thermal_core.h"
#include "thermal_trace.h"

int get_tz_trend(struct thermal_zone_device *tz, const struct thermal_trip *trip)
{ … }

static struct thermal_instance *get_instance(struct thermal_zone_device *tz,
					     struct thermal_cooling_device *cdev,
					     const struct thermal_trip *trip)
{ … }

bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,
				   const struct thermal_trip *trip,
				   struct thermal_cooling_device *cdev)
{ … }
EXPORT_SYMBOL_GPL(…);

struct thermal_instance *
get_thermal_instance(struct thermal_zone_device *tz,
		     struct thermal_cooling_device *cdev, int trip_index)
{ … }
EXPORT_SYMBOL(…);

/**
 * __thermal_zone_get_temp() - returns the temperature of a thermal zone
 * @tz: a valid pointer to a struct thermal_zone_device
 * @temp: a valid pointer to where to store the resulting temperature.
 *
 * When a valid thermal zone reference is passed, it will fetch its
 * temperature and fill @temp.
 *
 * Both tz and tz->ops must be valid pointers when calling this function,
 * and the tz->ops.get_temp callback must be provided.
 * The function must be called under tz->lock.
 *
 * Return: On success returns 0, an error code otherwise
 */
int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
{ … }

/**
 * thermal_zone_get_temp() - returns the temperature of a thermal zone
 * @tz: a valid pointer to a struct thermal_zone_device
 * @temp: a valid pointer to where to store the resulting temperature.
 *
 * When a valid thermal zone reference is passed, it will fetch its
 * temperature and fill @temp.
 *
 * Return: On success returns 0, an error code otherwise
 */
int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
{ … }
EXPORT_SYMBOL_GPL(…);

static int thermal_cdev_set_cur_state(struct thermal_cooling_device *cdev, int state)
{ … }

void __thermal_cdev_update(struct thermal_cooling_device *cdev)
{ … }

/**
 * thermal_cdev_update - update cooling device state if needed
 * @cdev:	pointer to struct thermal_cooling_device
 *
 * Update the cooling device state if there is a need.
 */
void thermal_cdev_update(struct thermal_cooling_device *cdev)
{ … }

/**
 * thermal_zone_get_slope - return the slope attribute of the thermal zone
 * @tz: thermal zone device with the slope attribute
 *
 * Return: If the thermal zone device has a slope attribute, return it, else
 * return 1.
 */
int thermal_zone_get_slope(struct thermal_zone_device *tz)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * thermal_zone_get_offset - return the offset attribute of the thermal zone
 * @tz: thermal zone device with the offset attribute
 *
 * Return: If the thermal zone device has a offset attribute, return it, else
 * return 0.
 */
int thermal_zone_get_offset(struct thermal_zone_device *tz)
{ … }
EXPORT_SYMBOL_GPL(…);