[mirror_ubuntu-artful-kernel.git] / drivers / thermal / samsung / exynos_thermal_common.c

/*
 * exynos_thermal_common.c - Samsung EXYNOS common thermal file
 *
 *  Copyright (C) 2013 Samsung Electronics
 *  Amit Daniel Kachhap <amit.daniel@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/cpu_cooling.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/thermal.h>

#include "exynos_thermal_common.h"

struct exynos_thermal_zone {
	enum thermal_device_mode mode;
	struct thermal_zone_device *therm_dev;
	struct thermal_cooling_device *cool_dev[MAX_COOLING_DEVICE];
	unsigned int cool_dev_size;
	struct platform_device *exynos4_dev;
	struct thermal_sensor_conf *sensor_conf;
	bool bind;
};

/* Get mode callback functions for thermal zone */
static int exynos_get_mode(struct thermal_zone_device *thermal,
			enum thermal_device_mode *mode)
{
	struct exynos_thermal_zone *th_zone = thermal->devdata;
	if (th_zone)
		*mode = th_zone->mode;
	return 0;
}

/* Set mode callback functions for thermal zone */
static int exynos_set_mode(struct thermal_zone_device *thermal,
			enum thermal_device_mode mode)
{
	struct exynos_thermal_zone *th_zone = thermal->devdata;
	if (!th_zone) {
		dev_err(&thermal->device,
			"thermal zone not registered\n");
		return 0;
	}

	mutex_lock(&thermal->lock);

	if (mode == THERMAL_DEVICE_ENABLED &&
		!th_zone->sensor_conf->trip_data.trigger_falling)
		thermal->polling_delay = IDLE_INTERVAL;
	else
		thermal->polling_delay = 0;

	mutex_unlock(&thermal->lock);

	th_zone->mode = mode;
	thermal_zone_device_update(thermal);
	dev_dbg(th_zone->sensor_conf->dev,
		"thermal polling set for duration=%d msec\n",
		thermal->polling_delay);
	return 0;
}


/* Get trip type callback functions for thermal zone */
static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip,
				 enum thermal_trip_type *type)
{
	struct exynos_thermal_zone *th_zone = thermal->devdata;
	int max_trip = th_zone->sensor_conf->trip_data.trip_count;
	int trip_type;

	if (trip < 0 || trip >= max_trip)
		return -EINVAL;

	trip_type = th_zone->sensor_conf->trip_data.trip_type[trip];

	if (trip_type == SW_TRIP)
		*type = THERMAL_TRIP_CRITICAL;
	else if (trip_type == THROTTLE_ACTIVE)
		*type = THERMAL_TRIP_ACTIVE;
	else if (trip_type == THROTTLE_PASSIVE)
		*type = THERMAL_TRIP_PASSIVE;
	else
		return -EINVAL;

	return 0;
}

/* Get trip temperature callback functions for thermal zone */
static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip,
				unsigned long *temp)
{
	struct exynos_thermal_zone *th_zone = thermal->devdata;
	int max_trip = th_zone->sensor_conf->trip_data.trip_count;

	if (trip < 0 || trip >= max_trip)
		return -EINVAL;

	*temp = th_zone->sensor_conf->trip_data.trip_val[trip];
	/* convert the temperature into millicelsius */
	*temp = *temp * MCELSIUS;

	return 0;
}

/* Get critical temperature callback functions for thermal zone */
static int exynos_get_crit_temp(struct thermal_zone_device *thermal,
				unsigned long *temp)
{
	struct exynos_thermal_zone *th_zone = thermal->devdata;
	int max_trip = th_zone->sensor_conf->trip_data.trip_count;
	/* Get the temp of highest trip*/
	return exynos_get_trip_temp(thermal, max_trip - 1, temp);
}

/* Bind callback functions for thermal zone */
static int exynos_bind(struct thermal_zone_device *thermal,
			struct thermal_cooling_device *cdev)
{
	int ret = 0, i, tab_size, level;
	struct freq_clip_table *tab_ptr, *clip_data;
	struct exynos_thermal_zone *th_zone = thermal->devdata;
	struct thermal_sensor_conf *data = th_zone->sensor_conf;

	tab_ptr = (struct freq_clip_table *)data->cooling_data.freq_data;
	tab_size = data->cooling_data.freq_clip_count;

	if (tab_ptr == NULL || tab_size == 0)
		return 0;

	/* find the cooling device registered*/
	for (i = 0; i < th_zone->cool_dev_size; i++)
		if (cdev == th_zone->cool_dev[i])
			break;

	/* No matching cooling device */
	if (i == th_zone->cool_dev_size)
		return 0;

	/* Bind the thermal zone to the cpufreq cooling device */
	for (i = 0; i < tab_size; i++) {
		clip_data = (struct freq_clip_table *)&(tab_ptr[i]);
		level = cpufreq_cooling_get_level(0, clip_data->freq_clip_max);
		if (level == THERMAL_CSTATE_INVALID)
			return 0;
		switch (GET_ZONE(i)) {
		case MONITOR_ZONE:
		case WARN_ZONE:
			if (thermal_zone_bind_cooling_device(thermal, i, cdev,
								level, 0)) {
				dev_err(data->dev,
					"error unbinding cdev inst=%d\n", i);
				ret = -EINVAL;
			}
			th_zone->bind = true;
			break;
		default:
			ret = -EINVAL;
		}
	}

	return ret;
}

/* Unbind callback functions for thermal zone */
static int exynos_unbind(struct thermal_zone_device *thermal,
			struct thermal_cooling_device *cdev)
{
	int ret = 0, i, tab_size;
	struct exynos_thermal_zone *th_zone = thermal->devdata;
	struct thermal_sensor_conf *data = th_zone->sensor_conf;

	if (th_zone->bind == false)
		return 0;

	tab_size = data->cooling_data.freq_clip_count;

	if (tab_size == 0)
		return 0;

	/* find the cooling device registered*/
	for (i = 0; i < th_zone->cool_dev_size; i++)
		if (cdev == th_zone->cool_dev[i])
			break;

	/* No matching cooling device */
	if (i == th_zone->cool_dev_size)
		return 0;

	/* Bind the thermal zone to the cpufreq cooling device */
	for (i = 0; i < tab_size; i++) {
		switch (GET_ZONE(i)) {
		case MONITOR_ZONE:
		case WARN_ZONE:
			if (thermal_zone_unbind_cooling_device(thermal, i,
								cdev)) {
				dev_err(data->dev,
					"error unbinding cdev inst=%d\n", i);
				ret = -EINVAL;
			}
			th_zone->bind = false;
			break;
		default:
			ret = -EINVAL;
		}
	}
	return ret;
}

/* Get temperature callback functions for thermal zone */
static int exynos_get_temp(struct thermal_zone_device *thermal,
			unsigned long *temp)
{
	struct exynos_thermal_zone *th_zone = thermal->devdata;
	void *data;

	if (!th_zone->sensor_conf) {
		dev_err(&thermal->device,
			"Temperature sensor not initialised\n");
		return -EINVAL;
	}
	data = th_zone->sensor_conf->driver_data;
	*temp = th_zone->sensor_conf->read_temperature(data);
	/* convert the temperature into millicelsius */
	*temp = *temp * MCELSIUS;
	return 0;
}

/* Get temperature callback functions for thermal zone */
static int exynos_set_emul_temp(struct thermal_zone_device *thermal,
						unsigned long temp)
{
	void *data;
	int ret = -EINVAL;
	struct exynos_thermal_zone *th_zone = thermal->devdata;

	if (!th_zone->sensor_conf) {
		dev_err(&thermal->device,
			"Temperature sensor not initialised\n");
		return -EINVAL;
	}
	data = th_zone->sensor_conf->driver_data;
	if (th_zone->sensor_conf->write_emul_temp)
		ret = th_zone->sensor_conf->write_emul_temp(data, temp);
	return ret;
}

/* Get the temperature trend */
static int exynos_get_trend(struct thermal_zone_device *thermal,
			int trip, enum thermal_trend *trend)
{
	int ret;
	unsigned long trip_temp;

	ret = exynos_get_trip_temp(thermal, trip, &trip_temp);
	if (ret < 0)
		return ret;

	if (thermal->temperature >= trip_temp)
		*trend = THERMAL_TREND_RAISE_FULL;
	else
		*trend = THERMAL_TREND_DROP_FULL;

	return 0;
}
/* Operation callback functions for thermal zone */
static struct thermal_zone_device_ops exynos_dev_ops = {
	.bind = exynos_bind,
	.unbind = exynos_unbind,
	.get_temp = exynos_get_temp,
	.set_emul_temp = exynos_set_emul_temp,
	.get_trend = exynos_get_trend,
	.get_mode = exynos_get_mode,
	.set_mode = exynos_set_mode,
	.get_trip_type = exynos_get_trip_type,
	.get_trip_temp = exynos_get_trip_temp,
	.get_crit_temp = exynos_get_crit_temp,
};

/*
 * This function may be called from interrupt based temperature sensor
 * when threshold is changed.
 */
void exynos_report_trigger(struct thermal_sensor_conf *conf)
{
	unsigned int i;
	char data[10];
	char *envp[] = { data, NULL };
	struct exynos_thermal_zone *th_zone;

	if (!conf || !conf->pzone_data) {
		pr_err("Invalid temperature sensor configuration data\n");
		return;
	}

	th_zone = conf->pzone_data;

	if (th_zone->bind == false) {
		for (i = 0; i < th_zone->cool_dev_size; i++) {
			if (!th_zone->cool_dev[i])
				continue;
			exynos_bind(th_zone->therm_dev,
					th_zone->cool_dev[i]);
		}
	}

	thermal_zone_device_update(th_zone->therm_dev);

	mutex_lock(&th_zone->therm_dev->lock);
	/* Find the level for which trip happened */
	for (i = 0; i < th_zone->sensor_conf->trip_data.trip_count; i++) {
		if (th_zone->therm_dev->last_temperature <
			th_zone->sensor_conf->trip_data.trip_val[i] * MCELSIUS)
			break;
	}

	if (th_zone->mode == THERMAL_DEVICE_ENABLED &&
		!th_zone->sensor_conf->trip_data.trigger_falling) {
		if (i > 0)
			th_zone->therm_dev->polling_delay = ACTIVE_INTERVAL;
		else
			th_zone->therm_dev->polling_delay = IDLE_INTERVAL;
	}

	snprintf(data, sizeof(data), "%u", i);
	kobject_uevent_env(&th_zone->therm_dev->device.kobj, KOBJ_CHANGE, envp);
	mutex_unlock(&th_zone->therm_dev->lock);
}

/* Register with the in-kernel thermal management */
int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
{
	int ret;
	struct cpumask mask_val;
	struct exynos_thermal_zone *th_zone;

	if (!sensor_conf || !sensor_conf->read_temperature) {
		pr_err("Temperature sensor not initialised\n");
		return -EINVAL;
	}

	th_zone = devm_kzalloc(sensor_conf->dev,
				sizeof(struct exynos_thermal_zone), GFP_KERNEL);
	if (!th_zone)
		return -ENOMEM;

	th_zone->sensor_conf = sensor_conf;
	/*
	 * TODO: 1) Handle multiple cooling devices in a thermal zone
	 *	 2) Add a flag/name in cooling info to map to specific
	 *	 sensor
	 */
	if (sensor_conf->cooling_data.freq_clip_count > 0) {
		cpumask_set_cpu(0, &mask_val);
		th_zone->cool_dev[th_zone->cool_dev_size] =
					cpufreq_cooling_register(&mask_val);
		if (IS_ERR(th_zone->cool_dev[th_zone->cool_dev_size])) {
			dev_err(sensor_conf->dev,
				"Failed to register cpufreq cooling device\n");
			ret = -EINVAL;
			goto err_unregister;
		}
		th_zone->cool_dev_size++;
	}

	th_zone->therm_dev = thermal_zone_device_register(
			sensor_conf->name, sensor_conf->trip_data.trip_count,
			0, th_zone, &exynos_dev_ops, NULL, 0,
			sensor_conf->trip_data.trigger_falling ? 0 :
			IDLE_INTERVAL);

	if (IS_ERR(th_zone->therm_dev)) {
		dev_err(sensor_conf->dev,
			"Failed to register thermal zone device\n");
		ret = PTR_ERR(th_zone->therm_dev);
		goto err_unregister;
	}
	th_zone->mode = THERMAL_DEVICE_ENABLED;
	sensor_conf->pzone_data = th_zone;

	dev_info(sensor_conf->dev,
		"Exynos: Thermal zone(%s) registered\n", sensor_conf->name);

	return 0;

err_unregister:
	exynos_unregister_thermal(sensor_conf);
	return ret;
}

/* Un-Register with the in-kernel thermal management */
void exynos_unregister_thermal(struct thermal_sensor_conf *sensor_conf)
{
	int i;
	struct exynos_thermal_zone *th_zone;

	if (!sensor_conf || !sensor_conf->pzone_data) {
		pr_err("Invalid temperature sensor configuration data\n");
		return;
	}

	th_zone = sensor_conf->pzone_data;

	thermal_zone_device_unregister(th_zone->therm_dev);

	for (i = 0; i < th_zone->cool_dev_size; ++i)
		cpufreq_cooling_unregister(th_zone->cool_dev[i]);

	dev_info(sensor_conf->dev,
		"Exynos: Kernel Thermal management unregistered\n");
}
Commit	Line	Data
1b678641 ADK	1	/*
	2	* exynos_thermal_common.c - Samsung EXYNOS common thermal file
	3	*
	4	* Copyright (C) 2013 Samsung Electronics
	5	* Amit Daniel Kachhap <amit.daniel@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	*/
	22
	23	#include <linux/cpu_cooling.h>
	24	#include <linux/err.h>
1b678641 ADK	25	#include <linux/slab.h>
	26	#include <linux/thermal.h>
	27
	28	#include "exynos_thermal_common.h"
	29
	30	struct exynos_thermal_zone {
	31	enum thermal_device_mode mode;
	32	struct thermal_zone_device *therm_dev;
	33	struct thermal_cooling_device *cool_dev[MAX_COOLING_DEVICE];
	34	unsigned int cool_dev_size;
	35	struct platform_device *exynos4_dev;
	36	struct thermal_sensor_conf *sensor_conf;
	37	bool bind;
	38	};
	39
1b678641 ADK	40	/* Get mode callback functions for thermal zone */
	41	static int exynos_get_mode(struct thermal_zone_device *thermal,
	42	enum thermal_device_mode *mode)
	43	{
4de0bdaa	44	struct exynos_thermal_zone *th_zone = thermal->devdata;
1b678641 ADK	45	if (th_zone)
	46	*mode = th_zone->mode;
	47	return 0;
	48	}
	49
	50	/* Set mode callback functions for thermal zone */
	51	static int exynos_set_mode(struct thermal_zone_device *thermal,
	52	enum thermal_device_mode mode)
	53	{
4de0bdaa ADK	54	struct exynos_thermal_zone *th_zone = thermal->devdata;
4de0bdaa ADK	55	if (!th_zone) {
91ff81cf	56	dev_err(&thermal->device,
c55930e3	57	"thermal zone not registered\n");
1b678641 ADK	58	return 0;
	59	}
	60
4de0bdaa	61	mutex_lock(&thermal->lock);
1b678641 ADK	62
	63	if (mode == THERMAL_DEVICE_ENABLED &&
	64	!th_zone->sensor_conf->trip_data.trigger_falling)
4de0bdaa	65	thermal->polling_delay = IDLE_INTERVAL;
1b678641	66	else
4de0bdaa	67	thermal->polling_delay = 0;
1b678641	68
4de0bdaa	69	mutex_unlock(&thermal->lock);
1b678641 ADK	70
1b678641 ADK	71	th_zone->mode = mode;
4de0bdaa	72	thermal_zone_device_update(thermal);
c55930e3 ADK	73	dev_dbg(th_zone->sensor_conf->dev,
	74	"thermal polling set for duration=%d msec\n",
	75	thermal->polling_delay);
1b678641 ADK	76	return 0;
	77	}
	78
	79
	80	/* Get trip type callback functions for thermal zone */
	81	static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip,
	82	enum thermal_trip_type *type)
	83	{
5c3cf552 ADK	84	struct exynos_thermal_zone *th_zone = thermal->devdata;
	85	int max_trip = th_zone->sensor_conf->trip_data.trip_count;
	86	int trip_type;
	87
	88	if (trip < 0 \|\| trip >= max_trip)
	89	return -EINVAL;
	90
	91	trip_type = th_zone->sensor_conf->trip_data.trip_type[trip];
	92
	93	if (trip_type == SW_TRIP)
1b678641	94	*type = THERMAL_TRIP_CRITICAL;
5c3cf552 ADK	95	else if (trip_type == THROTTLE_ACTIVE)
	96	*type = THERMAL_TRIP_ACTIVE;
	97	else if (trip_type == THROTTLE_PASSIVE)
	98	*type = THERMAL_TRIP_PASSIVE;
	99	else
1b678641	100	return -EINVAL;
5c3cf552	101
1b678641 ADK	102	return 0;
	103	}
	104
	105	/* Get trip temperature callback functions for thermal zone */
	106	static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip,
	107	unsigned long *temp)
	108	{
4de0bdaa	109	struct exynos_thermal_zone *th_zone = thermal->devdata;
5c3cf552	110	int max_trip = th_zone->sensor_conf->trip_data.trip_count;
4de0bdaa	111
5c3cf552	112	if (trip < 0 \|\| trip >= max_trip)
1b678641 ADK	113	return -EINVAL;
	114
	115	*temp = th_zone->sensor_conf->trip_data.trip_val[trip];
	116	/* convert the temperature into millicelsius */
	117	temp = temp * MCELSIUS;
	118
	119	return 0;
	120	}
	121
	122	/* Get critical temperature callback functions for thermal zone */
	123	static int exynos_get_crit_temp(struct thermal_zone_device *thermal,
	124	unsigned long *temp)
	125	{
5c3cf552 ADK	126	struct exynos_thermal_zone *th_zone = thermal->devdata;
	127	int max_trip = th_zone->sensor_conf->trip_data.trip_count;
	128	/* Get the temp of highest trip*/
	129	return exynos_get_trip_temp(thermal, max_trip - 1, temp);
1b678641 ADK	130	}
	131
	132	/* Bind callback functions for thermal zone */
	133	static int exynos_bind(struct thermal_zone_device *thermal,
	134	struct thermal_cooling_device *cdev)
	135	{
	136	int ret = 0, i, tab_size, level;
	137	struct freq_clip_table tab_ptr, clip_data;
4de0bdaa	138	struct exynos_thermal_zone *th_zone = thermal->devdata;
1b678641 ADK	139	struct thermal_sensor_conf *data = th_zone->sensor_conf;
	140
	141	tab_ptr = (struct freq_clip_table *)data->cooling_data.freq_data;
	142	tab_size = data->cooling_data.freq_clip_count;
	143
	144	if (tab_ptr == NULL \|\| tab_size == 0)
23a3eb10	145	return 0;
1b678641 ADK	146
	147	/* find the cooling device registered*/
	148	for (i = 0; i < th_zone->cool_dev_size; i++)
	149	if (cdev == th_zone->cool_dev[i])
	150	break;
	151
	152	/* No matching cooling device */
	153	if (i == th_zone->cool_dev_size)
	154	return 0;
	155
	156	/* Bind the thermal zone to the cpufreq cooling device */
	157	for (i = 0; i < tab_size; i++) {
	158	clip_data = (struct freq_clip_table *)&(tab_ptr[i]);
	159	level = cpufreq_cooling_get_level(0, clip_data->freq_clip_max);
	160	if (level == THERMAL_CSTATE_INVALID)
	161	return 0;
	162	switch (GET_ZONE(i)) {
	163	case MONITOR_ZONE:
	164	case WARN_ZONE:
	165	if (thermal_zone_bind_cooling_device(thermal, i, cdev,
	166	level, 0)) {
c55930e3 ADK	167	dev_err(data->dev,
c55930e3 ADK	168	"error unbinding cdev inst=%d\n", i);
1b678641 ADK	169	ret = -EINVAL;
	170	}
	171	th_zone->bind = true;
	172	break;
	173	default:
	174	ret = -EINVAL;
	175	}
	176	}
	177
	178	return ret;
	179	}
	180
	181	/* Unbind callback functions for thermal zone */
	182	static int exynos_unbind(struct thermal_zone_device *thermal,
	183	struct thermal_cooling_device *cdev)
	184	{
	185	int ret = 0, i, tab_size;
4de0bdaa	186	struct exynos_thermal_zone *th_zone = thermal->devdata;
1b678641 ADK	187	struct thermal_sensor_conf *data = th_zone->sensor_conf;
	188
	189	if (th_zone->bind == false)
	190	return 0;
	191
	192	tab_size = data->cooling_data.freq_clip_count;
	193
	194	if (tab_size == 0)
23a3eb10	195	return 0;
1b678641 ADK	196
	197	/* find the cooling device registered*/
	198	for (i = 0; i < th_zone->cool_dev_size; i++)
	199	if (cdev == th_zone->cool_dev[i])
	200	break;
	201
	202	/* No matching cooling device */
	203	if (i == th_zone->cool_dev_size)
	204	return 0;
	205
	206	/* Bind the thermal zone to the cpufreq cooling device */
	207	for (i = 0; i < tab_size; i++) {
	208	switch (GET_ZONE(i)) {
	209	case MONITOR_ZONE:
	210	case WARN_ZONE:
	211	if (thermal_zone_unbind_cooling_device(thermal, i,
	212	cdev)) {
c55930e3 ADK	213	dev_err(data->dev,
c55930e3 ADK	214	"error unbinding cdev inst=%d\n", i);
1b678641 ADK	215	ret = -EINVAL;
	216	}
	217	th_zone->bind = false;
	218	break;
	219	default:
	220	ret = -EINVAL;
	221	}
	222	}
	223	return ret;
	224	}
	225
	226	/* Get temperature callback functions for thermal zone */
	227	static int exynos_get_temp(struct thermal_zone_device *thermal,
	228	unsigned long *temp)
	229	{
4de0bdaa	230	struct exynos_thermal_zone *th_zone = thermal->devdata;
1b678641 ADK	231	void *data;
	232
	233	if (!th_zone->sensor_conf) {
91ff81cf	234	dev_err(&thermal->device,
c55930e3	235	"Temperature sensor not initialised\n");
1b678641 ADK	236	return -EINVAL;
1b678641 ADK	237	}
d58f0a6d	238	data = th_zone->sensor_conf->driver_data;
1b678641 ADK	239	*temp = th_zone->sensor_conf->read_temperature(data);
	240	/* convert the temperature into millicelsius */
	241	temp = temp * MCELSIUS;
	242	return 0;
	243	}
	244
	245	/* Get temperature callback functions for thermal zone */
	246	static int exynos_set_emul_temp(struct thermal_zone_device *thermal,
	247	unsigned long temp)
	248	{
	249	void *data;
	250	int ret = -EINVAL;
4de0bdaa	251	struct exynos_thermal_zone *th_zone = thermal->devdata;
1b678641 ADK	252
1b678641 ADK	253	if (!th_zone->sensor_conf) {
91ff81cf	254	dev_err(&thermal->device,
c55930e3	255	"Temperature sensor not initialised\n");
1b678641 ADK	256	return -EINVAL;
1b678641 ADK	257	}
d58f0a6d	258	data = th_zone->sensor_conf->driver_data;
1b678641 ADK	259	if (th_zone->sensor_conf->write_emul_temp)
	260	ret = th_zone->sensor_conf->write_emul_temp(data, temp);
	261	return ret;
	262	}
	263
	264	/* Get the temperature trend */
	265	static int exynos_get_trend(struct thermal_zone_device *thermal,
	266	int trip, enum thermal_trend *trend)
	267	{
	268	int ret;
	269	unsigned long trip_temp;
	270
	271	ret = exynos_get_trip_temp(thermal, trip, &trip_temp);
	272	if (ret < 0)
	273	return ret;
	274
	275	if (thermal->temperature >= trip_temp)
	276	*trend = THERMAL_TREND_RAISE_FULL;
	277	else
	278	*trend = THERMAL_TREND_DROP_FULL;
	279
	280	return 0;
	281	}
	282	/* Operation callback functions for thermal zone */
b688b5bf	283	static struct thermal_zone_device_ops exynos_dev_ops = {
1b678641 ADK	284	.bind = exynos_bind,
	285	.unbind = exynos_unbind,
	286	.get_temp = exynos_get_temp,
	287	.set_emul_temp = exynos_set_emul_temp,
	288	.get_trend = exynos_get_trend,
	289	.get_mode = exynos_get_mode,
	290	.set_mode = exynos_set_mode,
	291	.get_trip_type = exynos_get_trip_type,
	292	.get_trip_temp = exynos_get_trip_temp,
	293	.get_crit_temp = exynos_get_crit_temp,
	294	};
	295
	296	/*
	297	* This function may be called from interrupt based temperature sensor
	298	* when threshold is changed.
	299	*/
4de0bdaa	300	void exynos_report_trigger(struct thermal_sensor_conf *conf)
1b678641 ADK	301	{
	302	unsigned int i;
	303	char data[10];
	304	char *envp[] = { data, NULL };
4de0bdaa	305	struct exynos_thermal_zone *th_zone;
1b678641	306
4de0bdaa ADK	307	if (!conf \|\| !conf->pzone_data) {
4de0bdaa ADK	308	pr_err("Invalid temperature sensor configuration data\n");
1b678641	309	return;
4de0bdaa ADK	310	}
	311
	312	th_zone = conf->pzone_data;
4de0bdaa	313
1b678641 ADK	314	if (th_zone->bind == false) {
	315	for (i = 0; i < th_zone->cool_dev_size; i++) {
	316	if (!th_zone->cool_dev[i])
	317	continue;
	318	exynos_bind(th_zone->therm_dev,
	319	th_zone->cool_dev[i]);
	320	}
	321	}
	322
	323	thermal_zone_device_update(th_zone->therm_dev);
	324
	325	mutex_lock(&th_zone->therm_dev->lock);
	326	/* Find the level for which trip happened */
	327	for (i = 0; i < th_zone->sensor_conf->trip_data.trip_count; i++) {
	328	if (th_zone->therm_dev->last_temperature <
	329	th_zone->sensor_conf->trip_data.trip_val[i] * MCELSIUS)
	330	break;
	331	}
	332
	333	if (th_zone->mode == THERMAL_DEVICE_ENABLED &&
	334	!th_zone->sensor_conf->trip_data.trigger_falling) {
	335	if (i > 0)
	336	th_zone->therm_dev->polling_delay = ACTIVE_INTERVAL;
	337	else
	338	th_zone->therm_dev->polling_delay = IDLE_INTERVAL;
	339	}
	340
	341	snprintf(data, sizeof(data), "%u", i);
	342	kobject_uevent_env(&th_zone->therm_dev->device.kobj, KOBJ_CHANGE, envp);
	343	mutex_unlock(&th_zone->therm_dev->lock);
	344	}
	345
	346	/* Register with the in-kernel thermal management */
	347	int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
	348	{
	349	int ret;
	350	struct cpumask mask_val;
4de0bdaa	351	struct exynos_thermal_zone *th_zone;
1b678641 ADK	352
	353	if (!sensor_conf \|\| !sensor_conf->read_temperature) {
	354	pr_err("Temperature sensor not initialised\n");
	355	return -EINVAL;
	356	}
	357
c55930e3 ADK	358	th_zone = devm_kzalloc(sensor_conf->dev,
c55930e3 ADK	359	sizeof(struct exynos_thermal_zone), GFP_KERNEL);
1b678641 ADK	360	if (!th_zone)
	361	return -ENOMEM;
	362
	363	th_zone->sensor_conf = sensor_conf;
5c3cf552 ADK	364	/*
	365	* TODO: 1) Handle multiple cooling devices in a thermal zone
	366	* 2) Add a flag/name in cooling info to map to specific
	367	* sensor
	368	*/
	369	if (sensor_conf->cooling_data.freq_clip_count > 0) {
	370	cpumask_set_cpu(0, &mask_val);
	371	th_zone->cool_dev[th_zone->cool_dev_size] =
	372	cpufreq_cooling_register(&mask_val);
	373	if (IS_ERR(th_zone->cool_dev[th_zone->cool_dev_size])) {
c55930e3 ADK	374	dev_err(sensor_conf->dev,
c55930e3 ADK	375	"Failed to register cpufreq cooling device\n");
5c3cf552 ADK	376	ret = -EINVAL;
	377	goto err_unregister;
	378	}
	379	th_zone->cool_dev_size++;
1b678641	380	}
1b678641	381
5c3cf552 ADK	382	th_zone->therm_dev = thermal_zone_device_register(
	383	sensor_conf->name, sensor_conf->trip_data.trip_count,
	384	0, th_zone, &exynos_dev_ops, NULL, 0,
	385	sensor_conf->trip_data.trigger_falling ? 0 :
	386	IDLE_INTERVAL);
1b678641 ADK	387
1b678641 ADK	388	if (IS_ERR(th_zone->therm_dev)) {
c55930e3 ADK	389	dev_err(sensor_conf->dev,
c55930e3 ADK	390	"Failed to register thermal zone device\n");
1b678641 ADK	391	ret = PTR_ERR(th_zone->therm_dev);
	392	goto err_unregister;
	393	}
	394	th_zone->mode = THERMAL_DEVICE_ENABLED;
4de0bdaa	395	sensor_conf->pzone_data = th_zone;
1b678641	396
c55930e3 ADK	397	dev_info(sensor_conf->dev,
c55930e3 ADK	398	"Exynos: Thermal zone(%s) registered\n", sensor_conf->name);
1b678641 ADK	399
	400	return 0;
	401
	402	err_unregister:
4de0bdaa	403	exynos_unregister_thermal(sensor_conf);
1b678641 ADK	404	return ret;
	405	}
	406
	407	/* Un-Register with the in-kernel thermal management */
4de0bdaa	408	void exynos_unregister_thermal(struct thermal_sensor_conf *sensor_conf)
1b678641 ADK	409	{
1b678641 ADK	410	int i;
4de0bdaa	411	struct exynos_thermal_zone *th_zone;
1b678641	412
4de0bdaa ADK	413	if (!sensor_conf \|\| !sensor_conf->pzone_data) {
4de0bdaa ADK	414	pr_err("Invalid temperature sensor configuration data\n");
1b678641	415	return;
4de0bdaa ADK	416	}
	417
	418	th_zone = sensor_conf->pzone_data;
1b678641	419
d3e19567	420	thermal_zone_device_unregister(th_zone->therm_dev);
1b678641	421
d3e19567 ME	422	for (i = 0; i < th_zone->cool_dev_size; ++i)
d3e19567 ME	423	cpufreq_cooling_unregister(th_zone->cool_dev[i]);
1b678641	424
c55930e3 ADK	425	dev_info(sensor_conf->dev,
c55930e3 ADK	426	"Exynos: Kernel Thermal management unregistered\n");
1b678641	427	}