[deliverable/linux.git] / drivers / thermal / ti-soc-thermal / ti-thermal-common.c

/*
 * OMAP thermal driver interface
 *
 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
 * Contact:
 *   Eduardo Valentin <eduardo.valentin@ti.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/device.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/workqueue.h>
#include <linux/thermal.h>
#include <linux/cpufreq.h>
#include <linux/cpumask.h>
#include <linux/cpu_cooling.h>

#include "ti-thermal.h"
#include "ti-bandgap.h"

/* common data structures */
struct ti_thermal_data {
	struct thermal_zone_device *ti_thermal;
	struct thermal_zone_device *pcb_tz;
	struct thermal_cooling_device *cool_dev;
	struct ti_bandgap *bgp;
	enum thermal_device_mode mode;
	struct work_struct thermal_wq;
	int sensor_id;
};

static void ti_thermal_work(struct work_struct *work)
{
	struct ti_thermal_data *data = container_of(work,
					struct ti_thermal_data, thermal_wq);

	thermal_zone_device_update(data->ti_thermal);

	dev_dbg(&data->ti_thermal->device, "updated thermal zone %s\n",
		data->ti_thermal->type);
}

/**
 * ti_thermal_hotspot_temperature - returns sensor extrapolated temperature
 * @t:	omap sensor temperature
 * @s:	omap sensor slope value
 * @c:	omap sensor const value
 */
static inline int ti_thermal_hotspot_temperature(int t, int s, int c)
{
	int delta = t * s / 1000 + c;

	if (delta < 0)
		delta = 0;

	return t + delta;
}

/* thermal zone ops */
/* Get temperature callback function for thermal zone*/
static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal,
				      unsigned long *temp)
{
	struct thermal_zone_device *pcb_tz = NULL;
	struct ti_thermal_data *data = thermal->devdata;
	struct ti_bandgap *bgp;
	const struct ti_temp_sensor *s;
	int ret, tmp, slope, constant;
	unsigned long pcb_temp;

	if (!data)
		return 0;

	bgp = data->bgp;
	s = &bgp->conf->sensors[data->sensor_id];

	ret = ti_bandgap_read_temperature(bgp, data->sensor_id, &tmp);
	if (ret)
		return ret;

	/* Default constants */
	slope = s->slope;
	constant = s->constant;

	pcb_tz = data->pcb_tz;
	/* In case pcb zone is available, use the extrapolation rule with it */
	if (!IS_ERR(pcb_tz)) {
		ret = thermal_zone_get_temp(pcb_tz, &pcb_temp);
		if (!ret) {
			tmp -= pcb_temp; /* got a valid PCB temp */
			slope = s->slope_pcb;
			constant = s->constant_pcb;
		} else {
			dev_err(bgp->dev,
				"Failed to read PCB state. Using defaults\n");
		}
	}
	*temp = ti_thermal_hotspot_temperature(tmp, slope, constant);

	return ret;
}

/* Bind callback functions for thermal zone */
static int ti_thermal_bind(struct thermal_zone_device *thermal,
			   struct thermal_cooling_device *cdev)
{
	struct ti_thermal_data *data = thermal->devdata;
	int id;

	if (!data || IS_ERR(data))
		return -ENODEV;

	/* check if this is the cooling device we registered */
	if (data->cool_dev != cdev)
		return 0;

	id = data->sensor_id;

	/* Simple thing, two trips, one passive another critical */
	return thermal_zone_bind_cooling_device(thermal, 0, cdev,
	/* bind with min and max states defined by cpu_cooling */
						THERMAL_NO_LIMIT,
						THERMAL_NO_LIMIT);
}

/* Unbind callback functions for thermal zone */
static int ti_thermal_unbind(struct thermal_zone_device *thermal,
			     struct thermal_cooling_device *cdev)
{
	struct ti_thermal_data *data = thermal->devdata;

	if (!data || IS_ERR(data))
		return -ENODEV;

	/* check if this is the cooling device we registered */
	if (data->cool_dev != cdev)
		return 0;

	/* Simple thing, two trips, one passive another critical */
	return thermal_zone_unbind_cooling_device(thermal, 0, cdev);
}

/* Get mode callback functions for thermal zone */
static int ti_thermal_get_mode(struct thermal_zone_device *thermal,
			       enum thermal_device_mode *mode)
{
	struct ti_thermal_data *data = thermal->devdata;

	if (data)
		*mode = data->mode;

	return 0;
}

/* Set mode callback functions for thermal zone */
static int ti_thermal_set_mode(struct thermal_zone_device *thermal,
			       enum thermal_device_mode mode)
{
	struct ti_thermal_data *data = thermal->devdata;
	struct ti_bandgap *bgp;

	bgp = data->bgp;

	if (!data->ti_thermal) {
		dev_notice(&thermal->device, "thermal zone not registered\n");
		return 0;
	}

	mutex_lock(&data->ti_thermal->lock);

	if (mode == THERMAL_DEVICE_ENABLED)
		data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
	else
		data->ti_thermal->polling_delay = 0;

	mutex_unlock(&data->ti_thermal->lock);

	data->mode = mode;
	ti_bandgap_write_update_interval(bgp, data->sensor_id,
					data->ti_thermal->polling_delay);
	thermal_zone_device_update(data->ti_thermal);
	dev_dbg(&thermal->device, "thermal polling set for duration=%d msec\n",
		data->ti_thermal->polling_delay);

	return 0;
}

/* Get trip type callback functions for thermal zone */
static int ti_thermal_get_trip_type(struct thermal_zone_device *thermal,
				    int trip, enum thermal_trip_type *type)
{
	if (!ti_thermal_is_valid_trip(trip))
		return -EINVAL;

	if (trip + 1 == OMAP_TRIP_NUMBER)
		*type = THERMAL_TRIP_CRITICAL;
	else
		*type = THERMAL_TRIP_PASSIVE;

	return 0;
}

/* Get trip temperature callback functions for thermal zone */
static int ti_thermal_get_trip_temp(struct thermal_zone_device *thermal,
				    int trip, unsigned long *temp)
{
	if (!ti_thermal_is_valid_trip(trip))
		return -EINVAL;

	*temp = ti_thermal_get_trip_value(trip);

	return 0;
}

/* Get the temperature trend callback functions for thermal zone */
static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
				int trip, enum thermal_trend *trend)
{
	struct ti_thermal_data *data = thermal->devdata;
	struct ti_bandgap *bgp;
	int id, tr, ret = 0;

	bgp = data->bgp;
	id = data->sensor_id;

	ret = ti_bandgap_get_trend(bgp, id, &tr);
	if (ret)
		return ret;

	if (tr > 0)
		*trend = THERMAL_TREND_RAISING;
	else if (tr < 0)
		*trend = THERMAL_TREND_DROPPING;
	else
		*trend = THERMAL_TREND_STABLE;

	return 0;
}

/* Get critical temperature callback functions for thermal zone */
static int ti_thermal_get_crit_temp(struct thermal_zone_device *thermal,
				    unsigned long *temp)
{
	/* shutdown zone */
	return ti_thermal_get_trip_temp(thermal, OMAP_TRIP_NUMBER - 1, temp);
}

static struct thermal_zone_device_ops ti_thermal_ops = {
	.get_temp = ti_thermal_get_temp,
	.get_trend = ti_thermal_get_trend,
	.bind = ti_thermal_bind,
	.unbind = ti_thermal_unbind,
	.get_mode = ti_thermal_get_mode,
	.set_mode = ti_thermal_set_mode,
	.get_trip_type = ti_thermal_get_trip_type,
	.get_trip_temp = ti_thermal_get_trip_temp,
	.get_crit_temp = ti_thermal_get_crit_temp,
};

static struct ti_thermal_data
*ti_thermal_build_data(struct ti_bandgap *bgp, int id)
{
	struct ti_thermal_data *data;

	data = devm_kzalloc(bgp->dev, sizeof(*data), GFP_KERNEL);
	if (!data) {
		dev_err(bgp->dev, "kzalloc fail\n");
		return NULL;
	}
	data->sensor_id = id;
	data->bgp = bgp;
	data->mode = THERMAL_DEVICE_ENABLED;
	/* pcb_tz will be either valid or PTR_ERR() */
	data->pcb_tz = thermal_zone_get_zone_by_name("pcb");
	INIT_WORK(&data->thermal_wq, ti_thermal_work);

	return data;
}

int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
			     char *domain)
{
	struct ti_thermal_data *data;

	data = ti_bandgap_get_sensor_data(bgp, id);

	if (!data || IS_ERR(data))
		data = ti_thermal_build_data(bgp, id);

	if (!data)
		return -EINVAL;

	/* Create thermal zone */
	data->ti_thermal = thermal_zone_device_register(domain,
				OMAP_TRIP_NUMBER, 0, data, &ti_thermal_ops,
				NULL, FAST_TEMP_MONITORING_RATE,
				FAST_TEMP_MONITORING_RATE);
	if (IS_ERR(data->ti_thermal)) {
		dev_err(bgp->dev, "thermal zone device is NULL\n");
		return PTR_ERR(data->ti_thermal);
	}
	data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
	ti_bandgap_set_sensor_data(bgp, id, data);
	ti_bandgap_write_update_interval(bgp, data->sensor_id,
					data->ti_thermal->polling_delay);

	return 0;
}

int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id)
{
	struct ti_thermal_data *data;

	data = ti_bandgap_get_sensor_data(bgp, id);

	thermal_zone_device_unregister(data->ti_thermal);

	return 0;
}

int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id)
{
	struct ti_thermal_data *data;

	data = ti_bandgap_get_sensor_data(bgp, id);

	schedule_work(&data->thermal_wq);

	return 0;
}

int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
{
	struct ti_thermal_data *data;

	data = ti_bandgap_get_sensor_data(bgp, id);
	if (!data || IS_ERR(data))
		data = ti_thermal_build_data(bgp, id);

	if (!data)
		return -EINVAL;

	if (!cpufreq_get_current_driver()) {
		dev_dbg(bgp->dev, "no cpufreq driver yet\n");
		return -EPROBE_DEFER;
	}

	/* Register cooling device */
	data->cool_dev = cpufreq_cooling_register(cpu_present_mask);
	if (IS_ERR(data->cool_dev)) {
		dev_err(bgp->dev,
			"Failed to register cpufreq cooling device\n");
		return PTR_ERR(data->cool_dev);
	}
	ti_bandgap_set_sensor_data(bgp, id, data);

	return 0;
}

int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id)
{
	struct ti_thermal_data *data;

	data = ti_bandgap_get_sensor_data(bgp, id);
	cpufreq_cooling_unregister(data->cool_dev);

	return 0;
}
Commit	Line	Data
445eaf87 EV	1	/*
	2	* OMAP thermal driver interface
	3	*
	4	* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
	5	* Contact:
	6	* Eduardo Valentin <eduardo.valentin@ti.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* 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., 51 Franklin St, Fifth Floor, Boston, MA
	20	* 02110-1301 USA
	21	*
	22	*/
	23
	24	#include <linux/device.h>
	25	#include <linux/err.h>
	26	#include <linux/mutex.h>
	27	#include <linux/gfp.h>
	28	#include <linux/kernel.h>
	29	#include <linux/workqueue.h>
	30	#include <linux/thermal.h>
	31	#include <linux/cpufreq.h>
5035d48d	32	#include <linux/cpumask.h>
445eaf87 EV	33	#include <linux/cpu_cooling.h>
445eaf87 EV	34
7372add4 EV	35	#include "ti-thermal.h"
7372add4 EV	36	#include "ti-bandgap.h"
445eaf87 EV	37
445eaf87 EV	38	/* common data structures */
03e859d3 EV	39	struct ti_thermal_data {
03e859d3 EV	40	struct thermal_zone_device *ti_thermal;
359836e1	41	struct thermal_zone_device *pcb_tz;
445eaf87	42	struct thermal_cooling_device *cool_dev;
03e859d3	43	struct ti_bandgap *bgp;
445eaf87 EV	44	enum thermal_device_mode mode;
	45	struct work_struct thermal_wq;
	46	int sensor_id;
	47	};
	48
03e859d3	49	static void ti_thermal_work(struct work_struct *work)
445eaf87	50	{
03e859d3 EV	51	struct ti_thermal_data *data = container_of(work,
03e859d3 EV	52	struct ti_thermal_data, thermal_wq);
445eaf87	53
03e859d3	54	thermal_zone_device_update(data->ti_thermal);
445eaf87	55
03e859d3 EV	56	dev_dbg(&data->ti_thermal->device, "updated thermal zone %s\n",
03e859d3 EV	57	data->ti_thermal->type);
445eaf87 EV	58	}
	59
	60	/**
03e859d3	61	* ti_thermal_hotspot_temperature - returns sensor extrapolated temperature
445eaf87 EV	62	* @t: omap sensor temperature
	63	* @s: omap sensor slope value
	64	* @c: omap sensor const value
	65	*/
03e859d3	66	static inline int ti_thermal_hotspot_temperature(int t, int s, int c)
445eaf87 EV	67	{
	68	int delta = t * s / 1000 + c;
	69
	70	if (delta < 0)
	71	delta = 0;
	72
	73	return t + delta;
	74	}
	75
	76	/* thermal zone ops */
	77	/* Get temperature callback function for thermal zone*/
03e859d3 EV	78	static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal,
03e859d3 EV	79	unsigned long *temp)
445eaf87	80	{
359836e1	81	struct thermal_zone_device *pcb_tz = NULL;
03e859d3 EV	82	struct ti_thermal_data *data = thermal->devdata;
03e859d3 EV	83	struct ti_bandgap *bgp;
9879b2c4	84	const struct ti_temp_sensor *s;
359836e1 EV	85	int ret, tmp, slope, constant;
359836e1 EV	86	unsigned long pcb_temp;
445eaf87	87
04a4d10d EV	88	if (!data)
	89	return 0;
	90
d7f080e6 EV	91	bgp = data->bgp;
d7f080e6 EV	92	s = &bgp->conf->sensors[data->sensor_id];
04a4d10d	93
03e859d3	94	ret = ti_bandgap_read_temperature(bgp, data->sensor_id, &tmp);
445eaf87 EV	95	if (ret)
	96	return ret;
	97
359836e1 EV	98	/* Default constants */
	99	slope = s->slope;
	100	constant = s->constant;
	101
	102	pcb_tz = data->pcb_tz;
445eaf87	103	/* In case pcb zone is available, use the extrapolation rule with it */
0c12b5ac	104	if (!IS_ERR(pcb_tz)) {
359836e1 EV	105	ret = thermal_zone_get_temp(pcb_tz, &pcb_temp);
	106	if (!ret) {
	107	tmp -= pcb_temp; /* got a valid PCB temp */
	108	slope = s->slope_pcb;
	109	constant = s->constant_pcb;
	110	} else {
	111	dev_err(bgp->dev,
	112	"Failed to read PCB state. Using defaults\n");
	113	}
445eaf87	114	}
03e859d3	115	*temp = ti_thermal_hotspot_temperature(tmp, slope, constant);
445eaf87 EV	116
	117	return ret;
	118	}
	119
	120	/* Bind callback functions for thermal zone */
03e859d3 EV	121	static int ti_thermal_bind(struct thermal_zone_device *thermal,
03e859d3 EV	122	struct thermal_cooling_device *cdev)
445eaf87	123	{
03e859d3	124	struct ti_thermal_data *data = thermal->devdata;
5035d48d	125	int id;
445eaf87	126
0c12b5ac	127	if (!data \|\| IS_ERR(data))
445eaf87 EV	128	return -ENODEV;
	129
	130	/* check if this is the cooling device we registered */
	131	if (data->cool_dev != cdev)
	132	return 0;
	133
	134	id = data->sensor_id;
445eaf87	135
445eaf87	136	/* Simple thing, two trips, one passive another critical */
a7a3b8c8	137	return thermal_zone_bind_cooling_device(thermal, 0, cdev,
67b4c474	138	/* bind with min and max states defined by cpu_cooling */
a7a3b8c8 EV	139	THERMAL_NO_LIMIT,
a7a3b8c8 EV	140	THERMAL_NO_LIMIT);
445eaf87 EV	141	}
	142
	143	/* Unbind callback functions for thermal zone */
03e859d3 EV	144	static int ti_thermal_unbind(struct thermal_zone_device *thermal,
03e859d3 EV	145	struct thermal_cooling_device *cdev)
445eaf87	146	{
03e859d3	147	struct ti_thermal_data *data = thermal->devdata;
445eaf87	148
0c12b5ac	149	if (!data \|\| IS_ERR(data))
445eaf87 EV	150	return -ENODEV;
	151
	152	/* check if this is the cooling device we registered */
	153	if (data->cool_dev != cdev)
	154	return 0;
	155
	156	/* Simple thing, two trips, one passive another critical */
	157	return thermal_zone_unbind_cooling_device(thermal, 0, cdev);
	158	}
	159
	160	/* Get mode callback functions for thermal zone */
03e859d3 EV	161	static int ti_thermal_get_mode(struct thermal_zone_device *thermal,
03e859d3 EV	162	enum thermal_device_mode *mode)
445eaf87	163	{
03e859d3	164	struct ti_thermal_data *data = thermal->devdata;
445eaf87 EV	165
	166	if (data)
	167	*mode = data->mode;
	168
	169	return 0;
	170	}
	171
	172	/* Set mode callback functions for thermal zone */
03e859d3 EV	173	static int ti_thermal_set_mode(struct thermal_zone_device *thermal,
03e859d3 EV	174	enum thermal_device_mode mode)
445eaf87	175	{
03e859d3	176	struct ti_thermal_data *data = thermal->devdata;
10ccff1b RK	177	struct ti_bandgap *bgp;
	178
	179	bgp = data->bgp;
445eaf87	180
03e859d3	181	if (!data->ti_thermal) {
445eaf87 EV	182	dev_notice(&thermal->device, "thermal zone not registered\n");
	183	return 0;
	184	}
	185
03e859d3	186	mutex_lock(&data->ti_thermal->lock);
445eaf87 EV	187
445eaf87 EV	188	if (mode == THERMAL_DEVICE_ENABLED)
03e859d3	189	data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
445eaf87	190	else
03e859d3	191	data->ti_thermal->polling_delay = 0;
445eaf87	192
03e859d3	193	mutex_unlock(&data->ti_thermal->lock);
445eaf87 EV	194
445eaf87 EV	195	data->mode = mode;
10ccff1b RK	196	ti_bandgap_write_update_interval(bgp, data->sensor_id,
10ccff1b RK	197	data->ti_thermal->polling_delay);
03e859d3	198	thermal_zone_device_update(data->ti_thermal);
445eaf87	199	dev_dbg(&thermal->device, "thermal polling set for duration=%d msec\n",
03e859d3	200	data->ti_thermal->polling_delay);
445eaf87 EV	201
	202	return 0;
	203	}
	204
	205	/* Get trip type callback functions for thermal zone */
03e859d3 EV	206	static int ti_thermal_get_trip_type(struct thermal_zone_device *thermal,
03e859d3 EV	207	int trip, enum thermal_trip_type *type)
445eaf87	208	{
03e859d3	209	if (!ti_thermal_is_valid_trip(trip))
445eaf87 EV	210	return -EINVAL;
	211
	212	if (trip + 1 == OMAP_TRIP_NUMBER)
	213	*type = THERMAL_TRIP_CRITICAL;
	214	else
	215	*type = THERMAL_TRIP_PASSIVE;
	216
	217	return 0;
	218	}
	219
	220	/* Get trip temperature callback functions for thermal zone */
03e859d3 EV	221	static int ti_thermal_get_trip_temp(struct thermal_zone_device *thermal,
03e859d3 EV	222	int trip, unsigned long *temp)
445eaf87	223	{
03e859d3	224	if (!ti_thermal_is_valid_trip(trip))
445eaf87 EV	225	return -EINVAL;
445eaf87 EV	226
03e859d3	227	*temp = ti_thermal_get_trip_value(trip);
445eaf87 EV	228
	229	return 0;
	230	}
	231
03b7f67b K	232	/* Get the temperature trend callback functions for thermal zone */
	233	static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
	234	int trip, enum thermal_trend *trend)
	235	{
	236	struct ti_thermal_data *data = thermal->devdata;
	237	struct ti_bandgap *bgp;
	238	int id, tr, ret = 0;
	239
	240	bgp = data->bgp;
	241	id = data->sensor_id;
	242
	243	ret = ti_bandgap_get_trend(bgp, id, &tr);
	244	if (ret)
	245	return ret;
	246
	247	if (tr > 0)
	248	*trend = THERMAL_TREND_RAISING;
	249	else if (tr < 0)
	250	*trend = THERMAL_TREND_DROPPING;
	251	else
	252	*trend = THERMAL_TREND_STABLE;
	253
	254	return 0;
	255	}
	256
445eaf87	257	/* Get critical temperature callback functions for thermal zone */
03e859d3 EV	258	static int ti_thermal_get_crit_temp(struct thermal_zone_device *thermal,
03e859d3 EV	259	unsigned long *temp)
445eaf87 EV	260	{
445eaf87 EV	261	/* shutdown zone */
03e859d3	262	return ti_thermal_get_trip_temp(thermal, OMAP_TRIP_NUMBER - 1, temp);
445eaf87 EV	263	}
445eaf87 EV	264
03e859d3 EV	265	static struct thermal_zone_device_ops ti_thermal_ops = {
03e859d3 EV	266	.get_temp = ti_thermal_get_temp,
03b7f67b	267	.get_trend = ti_thermal_get_trend,
03e859d3 EV	268	.bind = ti_thermal_bind,
	269	.unbind = ti_thermal_unbind,
	270	.get_mode = ti_thermal_get_mode,
	271	.set_mode = ti_thermal_set_mode,
	272	.get_trip_type = ti_thermal_get_trip_type,
	273	.get_trip_temp = ti_thermal_get_trip_temp,
	274	.get_crit_temp = ti_thermal_get_crit_temp,
445eaf87 EV	275	};
445eaf87 EV	276
03e859d3 EV	277	static struct ti_thermal_data
03e859d3 EV	278	ti_thermal_build_data(struct ti_bandgap bgp, int id)
445eaf87	279	{
03e859d3	280	struct ti_thermal_data *data;
445eaf87	281
d7f080e6	282	data = devm_kzalloc(bgp->dev, sizeof(*data), GFP_KERNEL);
445eaf87	283	if (!data) {
d7f080e6	284	dev_err(bgp->dev, "kzalloc fail\n");
04a4d10d	285	return NULL;
445eaf87 EV	286	}
445eaf87 EV	287	data->sensor_id = id;
d7f080e6	288	data->bgp = bgp;
445eaf87	289	data->mode = THERMAL_DEVICE_ENABLED;
0c12b5ac	290	/* pcb_tz will be either valid or PTR_ERR() */
359836e1	291	data->pcb_tz = thermal_zone_get_zone_by_name("pcb");
03e859d3	292	INIT_WORK(&data->thermal_wq, ti_thermal_work);
445eaf87	293
04a4d10d EV	294	return data;
	295	}
	296
03e859d3 EV	297	int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
03e859d3 EV	298	char *domain)
04a4d10d	299	{
03e859d3	300	struct ti_thermal_data *data;
04a4d10d	301
03e859d3	302	data = ti_bandgap_get_sensor_data(bgp, id);
04a4d10d	303
0c12b5ac	304	if (!data \|\| IS_ERR(data))
03e859d3	305	data = ti_thermal_build_data(bgp, id);
04a4d10d EV	306
	307	if (!data)
	308	return -EINVAL;
	309
445eaf87	310	/* Create thermal zone */
03e859d3 EV	311	data->ti_thermal = thermal_zone_device_register(domain,
03e859d3 EV	312	OMAP_TRIP_NUMBER, 0, data, &ti_thermal_ops,
50125a9b	313	NULL, FAST_TEMP_MONITORING_RATE,
765a1939	314	FAST_TEMP_MONITORING_RATE);
0c12b5ac	315	if (IS_ERR(data->ti_thermal)) {
d7f080e6	316	dev_err(bgp->dev, "thermal zone device is NULL\n");
03e859d3	317	return PTR_ERR(data->ti_thermal);
445eaf87	318	}
03e859d3 EV	319	data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
03e859d3 EV	320	ti_bandgap_set_sensor_data(bgp, id, data);
10ccff1b RK	321	ti_bandgap_write_update_interval(bgp, data->sensor_id,
10ccff1b RK	322	data->ti_thermal->polling_delay);
445eaf87 EV	323
	324	return 0;
	325	}
	326
03e859d3	327	int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id)
445eaf87	328	{
03e859d3	329	struct ti_thermal_data *data;
445eaf87	330
03e859d3	331	data = ti_bandgap_get_sensor_data(bgp, id);
445eaf87	332
03e859d3	333	thermal_zone_device_unregister(data->ti_thermal);
445eaf87 EV	334
	335	return 0;
	336	}
	337
03e859d3	338	int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id)
445eaf87	339	{
03e859d3	340	struct ti_thermal_data *data;
445eaf87	341
03e859d3	342	data = ti_bandgap_get_sensor_data(bgp, id);
445eaf87 EV	343
	344	schedule_work(&data->thermal_wq);
	345
	346	return 0;
	347	}
	348
03e859d3	349	int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
445eaf87	350	{
03e859d3	351	struct ti_thermal_data *data;
445eaf87	352
03e859d3	353	data = ti_bandgap_get_sensor_data(bgp, id);
0c12b5ac	354	if (!data \|\| IS_ERR(data))
03e859d3	355	data = ti_thermal_build_data(bgp, id);
04a4d10d EV	356
	357	if (!data)
	358	return -EINVAL;
445eaf87	359
f1553334 EV	360	if (!cpufreq_get_current_driver()) {
	361	dev_dbg(bgp->dev, "no cpufreq driver yet\n");
	362	return -EPROBE_DEFER;
	363	}
	364
445eaf87	365	/* Register cooling device */
5035d48d	366	data->cool_dev = cpufreq_cooling_register(cpu_present_mask);
0c12b5ac	367	if (IS_ERR(data->cool_dev)) {
d7f080e6	368	dev_err(bgp->dev,
445eaf87 EV	369	"Failed to register cpufreq cooling device\n");
	370	return PTR_ERR(data->cool_dev);
	371	}
03e859d3	372	ti_bandgap_set_sensor_data(bgp, id, data);
445eaf87 EV	373
	374	return 0;
	375	}
	376
03e859d3	377	int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id)
445eaf87	378	{
03e859d3	379	struct ti_thermal_data *data;
445eaf87	380
03e859d3	381	data = ti_bandgap_get_sensor_data(bgp, id);
445eaf87 EV	382	cpufreq_cooling_unregister(data->cool_dev);
	383
	384	return 0;
	385	}