[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/cpumask.h>
#include <linux/cpu_cooling.h>
#include <linux/of.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;
	bool our_zone;
};

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(void *devdata, int *temp)
{
	struct thermal_zone_device *pcb_tz = NULL;
	struct ti_thermal_data *data = devdata;
	struct ti_bandgap *bgp;
	const struct ti_temp_sensor *s;
	int ret, tmp, slope, constant;
	int 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");
			ret = 0;
		}
	}
	*temp = ti_thermal_hotspot_temperature(tmp, slope, constant);

	return ret;
}

static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal,
				      int *temp)
{
	struct ti_thermal_data *data = thermal->devdata;

	return __ti_thermal_get_temp(data, temp);
}

/* 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,
						THERMAL_WEIGHT_DEFAULT);
}

/* 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, int *temp)
{
	if (!ti_thermal_is_valid_trip(trip))
		return -EINVAL;

	*temp = ti_thermal_get_trip_value(trip);

	return 0;
}

static int __ti_thermal_get_trend(void *p, int trip, enum thermal_trend *trend)
{
	struct ti_thermal_data *data = p;
	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 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)
{
	return __ti_thermal_get_trend(thermal->devdata, trip, trend);
}

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

static const struct thermal_zone_of_device_ops ti_of_thermal_ops = {
	.get_temp = __ti_thermal_get_temp,
	.get_trend = __ti_thermal_get_trend,
};

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;

	/* in case this is specified by DT */
	data->ti_thermal = devm_thermal_zone_of_sensor_register(bgp->dev, id,
					data, &ti_of_thermal_ops);
	if (IS_ERR(data->ti_thermal)) {
		/* 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;
		data->our_zone = true;
	}
	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);

	if (data && data->ti_thermal) {
		if (data->our_zone)
			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;
	struct device_node *np = bgp->dev->of_node;

	/*
	 * We are assuming here that if one deploys the zone
	 * using DT, then it must be aware that the cooling device
	 * loading has to happen via cpufreq driver.
	 */
	if (of_find_property(np, "#thermal-sensor-cells", NULL))
		return 0;

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

	if (!data)
		return -EINVAL;

	/* Register cooling device */
	data->cool_dev = cpufreq_cooling_register(cpu_present_mask);
	if (IS_ERR(data->cool_dev)) {
		int ret = PTR_ERR(data->cool_dev);

		if (ret != -EPROBE_DEFER)
			dev_err(bgp->dev,
				"Failed to register cpu cooling device %d\n",
				ret);

		return ret;
	}
	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);

	if (data)
		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>
5035d48d	31	#include <linux/cpumask.h>
445eaf87	32	#include <linux/cpu_cooling.h>
26d9cc65	33	#include <linux/of.h>
445eaf87	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;
26d9cc65	47	bool our_zone;
445eaf87 EV	48	};
445eaf87 EV	49
03e859d3	50	static void ti_thermal_work(struct work_struct *work)
445eaf87	51	{
03e859d3 EV	52	struct ti_thermal_data *data = container_of(work,
03e859d3 EV	53	struct ti_thermal_data, thermal_wq);
445eaf87	54
03e859d3	55	thermal_zone_device_update(data->ti_thermal);
445eaf87	56
03e859d3 EV	57	dev_dbg(&data->ti_thermal->device, "updated thermal zone %s\n",
03e859d3 EV	58	data->ti_thermal->type);
445eaf87 EV	59	}
	60
	61	/**
03e859d3	62	* ti_thermal_hotspot_temperature - returns sensor extrapolated temperature
445eaf87 EV	63	* @t: omap sensor temperature
	64	* @s: omap sensor slope value
	65	* @c: omap sensor const value
	66	*/
03e859d3	67	static inline int ti_thermal_hotspot_temperature(int t, int s, int c)
445eaf87 EV	68	{
	69	int delta = t * s / 1000 + c;
	70
	71	if (delta < 0)
	72	delta = 0;
	73
	74	return t + delta;
	75	}
	76
	77	/* thermal zone ops */
e34238bf	78	/* Get temperature callback function for thermal zone */
17e8351a	79	static inline int __ti_thermal_get_temp(void devdata, int temp)
445eaf87	80	{
359836e1	81	struct thermal_zone_device *pcb_tz = NULL;
26d9cc65	82	struct ti_thermal_data *data = devdata;
03e859d3	83	struct ti_bandgap *bgp;
9879b2c4	84	const struct ti_temp_sensor *s;
359836e1	85	int ret, tmp, slope, constant;
17e8351a	86	int 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");
df8f1347	113	ret = 0;
359836e1	114	}
445eaf87	115	}
03e859d3	116	*temp = ti_thermal_hotspot_temperature(tmp, slope, constant);
445eaf87 EV	117
	118	return ret;
	119	}
	120
26d9cc65	121	static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal,
17e8351a	122	int *temp)
26d9cc65 EV	123	{
	124	struct ti_thermal_data *data = thermal->devdata;
	125
	126	return __ti_thermal_get_temp(data, temp);
	127	}
	128
445eaf87	129	/* Bind callback functions for thermal zone */
03e859d3 EV	130	static int ti_thermal_bind(struct thermal_zone_device *thermal,
03e859d3 EV	131	struct thermal_cooling_device *cdev)
445eaf87	132	{
03e859d3	133	struct ti_thermal_data *data = thermal->devdata;
5035d48d	134	int id;
445eaf87	135
0c12b5ac	136	if (!data \|\| IS_ERR(data))
445eaf87 EV	137	return -ENODEV;
	138
	139	/* check if this is the cooling device we registered */
	140	if (data->cool_dev != cdev)
	141	return 0;
	142
	143	id = data->sensor_id;
445eaf87	144
445eaf87	145	/* Simple thing, two trips, one passive another critical */
a7a3b8c8	146	return thermal_zone_bind_cooling_device(thermal, 0, cdev,
67b4c474	147	/* bind with min and max states defined by cpu_cooling */
a7a3b8c8	148	THERMAL_NO_LIMIT,
6cd9e9f6 KS	149	THERMAL_NO_LIMIT,
6cd9e9f6 KS	150	THERMAL_WEIGHT_DEFAULT);
445eaf87 EV	151	}
	152
	153	/* Unbind callback functions for thermal zone */
03e859d3 EV	154	static int ti_thermal_unbind(struct thermal_zone_device *thermal,
03e859d3 EV	155	struct thermal_cooling_device *cdev)
445eaf87	156	{
03e859d3	157	struct ti_thermal_data *data = thermal->devdata;
445eaf87	158
0c12b5ac	159	if (!data \|\| IS_ERR(data))
445eaf87 EV	160	return -ENODEV;
	161
	162	/* check if this is the cooling device we registered */
	163	if (data->cool_dev != cdev)
	164	return 0;
	165
	166	/* Simple thing, two trips, one passive another critical */
	167	return thermal_zone_unbind_cooling_device(thermal, 0, cdev);
	168	}
	169
	170	/* Get mode callback functions for thermal zone */
03e859d3 EV	171	static int ti_thermal_get_mode(struct thermal_zone_device *thermal,
03e859d3 EV	172	enum thermal_device_mode *mode)
445eaf87	173	{
03e859d3	174	struct ti_thermal_data *data = thermal->devdata;
445eaf87 EV	175
	176	if (data)
	177	*mode = data->mode;
	178
	179	return 0;
	180	}
	181
	182	/* Set mode callback functions for thermal zone */
03e859d3 EV	183	static int ti_thermal_set_mode(struct thermal_zone_device *thermal,
03e859d3 EV	184	enum thermal_device_mode mode)
445eaf87	185	{
03e859d3	186	struct ti_thermal_data *data = thermal->devdata;
10ccff1b RK	187	struct ti_bandgap *bgp;
	188
	189	bgp = data->bgp;
445eaf87	190
03e859d3	191	if (!data->ti_thermal) {
445eaf87 EV	192	dev_notice(&thermal->device, "thermal zone not registered\n");
	193	return 0;
	194	}
	195
03e859d3	196	mutex_lock(&data->ti_thermal->lock);
445eaf87 EV	197
445eaf87 EV	198	if (mode == THERMAL_DEVICE_ENABLED)
03e859d3	199	data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
445eaf87	200	else
03e859d3	201	data->ti_thermal->polling_delay = 0;
445eaf87	202
03e859d3	203	mutex_unlock(&data->ti_thermal->lock);
445eaf87 EV	204
445eaf87 EV	205	data->mode = mode;
10ccff1b RK	206	ti_bandgap_write_update_interval(bgp, data->sensor_id,
10ccff1b RK	207	data->ti_thermal->polling_delay);
03e859d3	208	thermal_zone_device_update(data->ti_thermal);
445eaf87	209	dev_dbg(&thermal->device, "thermal polling set for duration=%d msec\n",
03e859d3	210	data->ti_thermal->polling_delay);
445eaf87 EV	211
	212	return 0;
	213	}
	214
	215	/* Get trip type callback functions for thermal zone */
03e859d3 EV	216	static int ti_thermal_get_trip_type(struct thermal_zone_device *thermal,
03e859d3 EV	217	int trip, enum thermal_trip_type *type)
445eaf87	218	{
03e859d3	219	if (!ti_thermal_is_valid_trip(trip))
445eaf87 EV	220	return -EINVAL;
	221
	222	if (trip + 1 == OMAP_TRIP_NUMBER)
	223	*type = THERMAL_TRIP_CRITICAL;
	224	else
	225	*type = THERMAL_TRIP_PASSIVE;
	226
	227	return 0;
	228	}
	229
	230	/* Get trip temperature callback functions for thermal zone */
03e859d3	231	static int ti_thermal_get_trip_temp(struct thermal_zone_device *thermal,
17e8351a	232	int trip, int *temp)
445eaf87	233	{
03e859d3	234	if (!ti_thermal_is_valid_trip(trip))
445eaf87 EV	235	return -EINVAL;
445eaf87 EV	236
03e859d3	237	*temp = ti_thermal_get_trip_value(trip);
445eaf87 EV	238
	239	return 0;
	240	}
	241
94f94ab7	242	static int __ti_thermal_get_trend(void p, int trip, enum thermal_trend trend)
03b7f67b	243	{
26d9cc65	244	struct ti_thermal_data *data = p;
03b7f67b K	245	struct ti_bandgap *bgp;
	246	int id, tr, ret = 0;
	247
	248	bgp = data->bgp;
	249	id = data->sensor_id;
	250
	251	ret = ti_bandgap_get_trend(bgp, id, &tr);
	252	if (ret)
	253	return ret;
	254
	255	if (tr > 0)
	256	*trend = THERMAL_TREND_RAISING;
	257	else if (tr < 0)
	258	*trend = THERMAL_TREND_DROPPING;
	259	else
	260	*trend = THERMAL_TREND_STABLE;
	261
	262	return 0;
	263	}
	264
94f94ab7 SH	265	/* Get the temperature trend callback functions for thermal zone */
	266	static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
	267	int trip, enum thermal_trend *trend)
	268	{
	269	return __ti_thermal_get_trend(thermal->devdata, trip, trend);
	270	}
	271
445eaf87	272	/* Get critical temperature callback functions for thermal zone */
03e859d3	273	static int ti_thermal_get_crit_temp(struct thermal_zone_device *thermal,
17e8351a	274	int *temp)
445eaf87 EV	275	{
445eaf87 EV	276	/* shutdown zone */
03e859d3	277	return ti_thermal_get_trip_temp(thermal, OMAP_TRIP_NUMBER - 1, temp);
445eaf87 EV	278	}
445eaf87 EV	279
2251aef6 EV	280	static const struct thermal_zone_of_device_ops ti_of_thermal_ops = {
	281	.get_temp = __ti_thermal_get_temp,
	282	.get_trend = __ti_thermal_get_trend,
	283	};
	284
03e859d3 EV	285	static struct thermal_zone_device_ops ti_thermal_ops = {
03e859d3 EV	286	.get_temp = ti_thermal_get_temp,
03b7f67b	287	.get_trend = ti_thermal_get_trend,
03e859d3 EV	288	.bind = ti_thermal_bind,
	289	.unbind = ti_thermal_unbind,
	290	.get_mode = ti_thermal_get_mode,
	291	.set_mode = ti_thermal_set_mode,
	292	.get_trip_type = ti_thermal_get_trip_type,
	293	.get_trip_temp = ti_thermal_get_trip_temp,
	294	.get_crit_temp = ti_thermal_get_crit_temp,
445eaf87 EV	295	};
445eaf87 EV	296
03e859d3 EV	297	static struct ti_thermal_data
03e859d3 EV	298	ti_thermal_build_data(struct ti_bandgap bgp, int id)
445eaf87	299	{
03e859d3	300	struct ti_thermal_data *data;
445eaf87	301
d7f080e6	302	data = devm_kzalloc(bgp->dev, sizeof(*data), GFP_KERNEL);
445eaf87	303	if (!data) {
d7f080e6	304	dev_err(bgp->dev, "kzalloc fail\n");
04a4d10d	305	return NULL;
445eaf87 EV	306	}
445eaf87 EV	307	data->sensor_id = id;
d7f080e6	308	data->bgp = bgp;
445eaf87	309	data->mode = THERMAL_DEVICE_ENABLED;
0c12b5ac	310	/* pcb_tz will be either valid or PTR_ERR() */
359836e1	311	data->pcb_tz = thermal_zone_get_zone_by_name("pcb");
03e859d3	312	INIT_WORK(&data->thermal_wq, ti_thermal_work);
445eaf87	313
04a4d10d EV	314	return data;
	315	}
	316
03e859d3 EV	317	int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
03e859d3 EV	318	char *domain)
04a4d10d	319	{
03e859d3	320	struct ti_thermal_data *data;
04a4d10d	321
03e859d3	322	data = ti_bandgap_get_sensor_data(bgp, id);
04a4d10d	323
0c12b5ac	324	if (!data \|\| IS_ERR(data))
03e859d3	325	data = ti_thermal_build_data(bgp, id);
04a4d10d EV	326
	327	if (!data)
	328	return -EINVAL;
	329
26d9cc65	330	/* in case this is specified by DT */
3982204c	331	data->ti_thermal = devm_thermal_zone_of_sensor_register(bgp->dev, id,
2251aef6	332	data, &ti_of_thermal_ops);
26d9cc65 EV	333	if (IS_ERR(data->ti_thermal)) {
	334	/* Create thermal zone */
	335	data->ti_thermal = thermal_zone_device_register(domain,
03e859d3	336	OMAP_TRIP_NUMBER, 0, data, &ti_thermal_ops,
50125a9b	337	NULL, FAST_TEMP_MONITORING_RATE,
765a1939	338	FAST_TEMP_MONITORING_RATE);
26d9cc65 EV	339	if (IS_ERR(data->ti_thermal)) {
	340	dev_err(bgp->dev, "thermal zone device is NULL\n");
	341	return PTR_ERR(data->ti_thermal);
	342	}
	343	data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
	344	data->our_zone = true;
445eaf87	345	}
03e859d3	346	ti_bandgap_set_sensor_data(bgp, id, data);
10ccff1b RK	347	ti_bandgap_write_update_interval(bgp, data->sensor_id,
10ccff1b RK	348	data->ti_thermal->polling_delay);
445eaf87 EV	349
	350	return 0;
	351	}
	352
03e859d3	353	int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id)
445eaf87	354	{
03e859d3	355	struct ti_thermal_data *data;
445eaf87	356
03e859d3	357	data = ti_bandgap_get_sensor_data(bgp, id);
445eaf87	358
26d9cc65 EV	359	if (data && data->ti_thermal) {
	360	if (data->our_zone)
	361	thermal_zone_device_unregister(data->ti_thermal);
26d9cc65	362	}
445eaf87 EV	363
	364	return 0;
	365	}
	366
03e859d3	367	int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id)
445eaf87	368	{
03e859d3	369	struct ti_thermal_data *data;
445eaf87	370
03e859d3	371	data = ti_bandgap_get_sensor_data(bgp, id);
445eaf87 EV	372
	373	schedule_work(&data->thermal_wq);
	374
	375	return 0;
	376	}
	377
03e859d3	378	int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
445eaf87	379	{
03e859d3	380	struct ti_thermal_data *data;
26d9cc65 EV	381	struct device_node *np = bgp->dev->of_node;
	382
	383	/*
	384	* We are assuming here that if one deploys the zone
	385	* using DT, then it must be aware that the cooling device
	386	* loading has to happen via cpufreq driver.
	387	*/
	388	if (of_find_property(np, "#thermal-sensor-cells", NULL))
	389	return 0;
445eaf87	390
03e859d3	391	data = ti_bandgap_get_sensor_data(bgp, id);
0c12b5ac	392	if (!data \|\| IS_ERR(data))
03e859d3	393	data = ti_thermal_build_data(bgp, id);
04a4d10d EV	394
	395	if (!data)
	396	return -EINVAL;
445eaf87	397
445eaf87	398	/* Register cooling device */
5035d48d	399	data->cool_dev = cpufreq_cooling_register(cpu_present_mask);
0c12b5ac	400	if (IS_ERR(data->cool_dev)) {
cffafc32 EV	401	int ret = PTR_ERR(data->cool_dev);
	402
	403	if (ret != -EPROBE_DEFER)
	404	dev_err(bgp->dev,
	405	"Failed to register cpu cooling device %d\n",
	406	ret);
	407
	408	return ret;
445eaf87	409	}
03e859d3	410	ti_bandgap_set_sensor_data(bgp, id, data);
445eaf87 EV	411
	412	return 0;
	413	}
	414
03e859d3	415	int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id)
445eaf87	416	{
03e859d3	417	struct ti_thermal_data *data;
445eaf87	418
03e859d3	419	data = ti_bandgap_get_sensor_data(bgp, id);
26d9cc65	420
9ca9be2b	421	if (data)
26d9cc65	422	cpufreq_cooling_unregister(data->cool_dev);
445eaf87 EV	423
	424	return 0;
	425	}