[linux-2.6-block.git] / drivers / thermal / int340x_thermal / int3403_thermal.c

/*
 * ACPI INT3403 thermal driver
 * Copyright (c) 2013, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/acpi.h>
#include <linux/thermal.h>
#include <linux/platform_device.h>

#define INT3403_TYPE_SENSOR		0x03
#define INT3403_TYPE_CHARGER		0x0B
#define INT3403_TYPE_BATTERY		0x0C
#define INT3403_PERF_CHANGED_EVENT	0x80
#define INT3403_THERMAL_EVENT		0x90

#define DECI_KELVIN_TO_MILLI_CELSIUS(t, off) (((t) - (off)) * 100)
#define KELVIN_OFFSET	2732
#define MILLI_CELSIUS_TO_DECI_KELVIN(t, off) (((t) / 100) + (off))

struct int3403_sensor {
	struct thermal_zone_device *tzone;
	unsigned long *thresholds;
	unsigned long	crit_temp;
	int		crit_trip_id;
	unsigned long	psv_temp;
	int		psv_trip_id;

};

struct int3403_performance_state {
	u64 performance;
	u64 power;
	u64 latency;
	u64 linear;
	u64 control;
	u64 raw_performace;
	char *raw_unit;
	int reserved;
};

struct int3403_cdev {
	struct thermal_cooling_device *cdev;
	unsigned long max_state;
};

struct int3403_priv {
	struct platform_device *pdev;
	struct acpi_device *adev;
	unsigned long long type;
	void *priv;
};

static int sys_get_curr_temp(struct thermal_zone_device *tzone,
				unsigned long *temp)
{
	struct int3403_priv *priv = tzone->devdata;
	struct acpi_device *device = priv->adev;
	unsigned long long tmp;
	acpi_status status;

	status = acpi_evaluate_integer(device->handle, "_TMP", NULL, &tmp);
	if (ACPI_FAILURE(status))
		return -EIO;

	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(tmp, KELVIN_OFFSET);

	return 0;
}

static int sys_get_trip_hyst(struct thermal_zone_device *tzone,
		int trip, unsigned long *temp)
{
	struct int3403_priv *priv = tzone->devdata;
	struct acpi_device *device = priv->adev;
	unsigned long long hyst;
	acpi_status status;

	status = acpi_evaluate_integer(device->handle, "GTSH", NULL, &hyst);
	if (ACPI_FAILURE(status))
		return -EIO;

	/*
	 * Thermal hysteresis represents a temperature difference.
	 * Kelvin and Celsius have same degree size. So the
	 * conversion here between tenths of degree Kelvin unit
	 * and Milli-Celsius unit is just to multiply 100.
	 */
	*temp = hyst * 100;

	return 0;
}

static int sys_get_trip_temp(struct thermal_zone_device *tzone,
		int trip, unsigned long *temp)
{
	struct int3403_priv *priv = tzone->devdata;
	struct int3403_sensor *obj = priv->priv;

	if (priv->type != INT3403_TYPE_SENSOR || !obj)
		return -EINVAL;

	if (trip == obj->crit_trip_id)
		*temp = obj->crit_temp;
	else if (trip == obj->psv_trip_id)
		*temp = obj->psv_temp;
	else {
		/*
		 * get_trip_temp is a mandatory callback but
		 * PATx method doesn't return any value, so return
		 * cached value, which was last set from user space
		 */
		*temp = obj->thresholds[trip];
	}

	return 0;
}

static int sys_get_trip_type(struct thermal_zone_device *thermal,
		int trip, enum thermal_trip_type *type)
{
	struct int3403_priv *priv = thermal->devdata;
	struct int3403_sensor *obj = priv->priv;

	/* Mandatory callback, may not mean much here */
	if (trip == obj->crit_trip_id)
		*type = THERMAL_TRIP_CRITICAL;
	else
		*type = THERMAL_TRIP_PASSIVE;

	return 0;
}

int sys_set_trip_temp(struct thermal_zone_device *tzone, int trip,
							unsigned long temp)
{
	struct int3403_priv *priv = tzone->devdata;
	struct acpi_device *device = priv->adev;
	struct int3403_sensor *obj = priv->priv;
	acpi_status status;
	char name[10];
	int ret = 0;

	snprintf(name, sizeof(name), "PAT%d", trip);
	if (acpi_has_method(device->handle, name)) {
		status = acpi_execute_simple_method(device->handle, name,
				MILLI_CELSIUS_TO_DECI_KELVIN(temp,
							KELVIN_OFFSET));
		if (ACPI_FAILURE(status))
			ret = -EIO;
		else
			obj->thresholds[trip] = temp;
	} else {
		ret = -EIO;
		dev_err(&device->dev, "sys_set_trip_temp: method not found\n");
	}

	return ret;
}

static struct thermal_zone_device_ops tzone_ops = {
	.get_temp = sys_get_curr_temp,
	.get_trip_temp = sys_get_trip_temp,
	.get_trip_type = sys_get_trip_type,
	.set_trip_temp = sys_set_trip_temp,
	.get_trip_hyst =  sys_get_trip_hyst,
};

static struct thermal_zone_params int3403_thermal_params = {
	.governor_name = "user_space",
	.no_hwmon = true,
};

static void int3403_notify(acpi_handle handle,
		u32 event, void *data)
{
	struct int3403_priv *priv = data;
	struct int3403_sensor *obj;

	if (!priv)
		return;

	obj = priv->priv;
	if (priv->type != INT3403_TYPE_SENSOR || !obj)
		return;

	switch (event) {
	case INT3403_PERF_CHANGED_EVENT:
		break;
	case INT3403_THERMAL_EVENT:
		thermal_zone_device_update(obj->tzone);
		break;
	default:
		dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
		break;
	}
}

static int sys_get_trip_crt(struct acpi_device *device, unsigned long *temp)
{
	unsigned long long crt;
	acpi_status status;

	status = acpi_evaluate_integer(device->handle, "_CRT", NULL, &crt);
	if (ACPI_FAILURE(status))
		return -EIO;

	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(crt, KELVIN_OFFSET);

	return 0;
}

static int sys_get_trip_psv(struct acpi_device *device, unsigned long *temp)
{
	unsigned long long psv;
	acpi_status status;

	status = acpi_evaluate_integer(device->handle, "_PSV", NULL, &psv);
	if (ACPI_FAILURE(status))
		return -EIO;

	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(psv, KELVIN_OFFSET);

	return 0;
}

static int int3403_sensor_add(struct int3403_priv *priv)
{
	int result = 0;
	acpi_status status;
	struct int3403_sensor *obj;
	unsigned long long trip_cnt;
	int trip_mask = 0;

	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	if (!obj)
		return -ENOMEM;

	priv->priv = obj;

	status = acpi_evaluate_integer(priv->adev->handle, "PATC", NULL,
						&trip_cnt);
	if (ACPI_FAILURE(status))
		trip_cnt = 0;

	if (trip_cnt) {
		/* We have to cache, thresholds can't be readback */
		obj->thresholds = devm_kzalloc(&priv->pdev->dev,
					sizeof(*obj->thresholds) * trip_cnt,
					GFP_KERNEL);
		if (!obj->thresholds) {
			result = -ENOMEM;
			goto err_free_obj;
		}
		trip_mask = BIT(trip_cnt) - 1;
	}

	obj->psv_trip_id = -1;
	if (!sys_get_trip_psv(priv->adev, &obj->psv_temp))
		obj->psv_trip_id = trip_cnt++;

	obj->crit_trip_id = -1;
	if (!sys_get_trip_crt(priv->adev, &obj->crit_temp))
		obj->crit_trip_id = trip_cnt++;

	obj->tzone = thermal_zone_device_register(acpi_device_bid(priv->adev),
				trip_cnt, trip_mask, priv, &tzone_ops,
				&int3403_thermal_params, 0, 0);
	if (IS_ERR(obj->tzone)) {
		result = PTR_ERR(obj->tzone);
		obj->tzone = NULL;
		goto err_free_obj;
	}

	result = acpi_install_notify_handler(priv->adev->handle,
			ACPI_DEVICE_NOTIFY, int3403_notify,
			(void *)priv);
	if (result)
		goto err_free_obj;

	return 0;

 err_free_obj:
	thermal_zone_device_unregister(obj->tzone);
	return result;
}

static int int3403_sensor_remove(struct int3403_priv *priv)
{
	struct int3403_sensor *obj = priv->priv;

	thermal_zone_device_unregister(obj->tzone);
	return 0;
}

/* INT3403 Cooling devices */
static int int3403_get_max_state(struct thermal_cooling_device *cdev,
				 unsigned long *state)
{
	struct int3403_priv *priv = cdev->devdata;
	struct int3403_cdev *obj = priv->priv;

	*state = obj->max_state;
	return 0;
}

static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
				 unsigned long *state)
{
	struct int3403_priv *priv = cdev->devdata;
	unsigned long long level;
	acpi_status status;

	status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
	if (ACPI_SUCCESS(status)) {
		*state = level;
		return 0;
	} else
		return -EINVAL;
}

static int
int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
{
	struct int3403_priv *priv = cdev->devdata;
	acpi_status status;

	status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
	if (ACPI_SUCCESS(status))
		return 0;
	else
		return -EINVAL;
}

static const struct thermal_cooling_device_ops int3403_cooling_ops = {
	.get_max_state = int3403_get_max_state,
	.get_cur_state = int3403_get_cur_state,
	.set_cur_state = int3403_set_cur_state,
};

static int int3403_cdev_add(struct int3403_priv *priv)
{
	int result = 0;
	acpi_status status;
	struct int3403_cdev *obj;
	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *p;

	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	if (!obj)
		return -ENOMEM;

	status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	p = buf.pointer;
	if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
		printk(KERN_WARNING "Invalid PPSS data\n");
		kfree(buf.pointer);
		return -EFAULT;
	}

	obj->max_state = p->package.count - 1;
	obj->cdev =
		thermal_cooling_device_register(acpi_device_bid(priv->adev),
				priv, &int3403_cooling_ops);
	if (IS_ERR(obj->cdev))
		result = PTR_ERR(obj->cdev);

	priv->priv = obj;

	kfree(buf.pointer);
	/* TODO: add ACPI notification support */

	return result;
}

static int int3403_cdev_remove(struct int3403_priv *priv)
{
	struct int3403_cdev *obj = priv->priv;

	thermal_cooling_device_unregister(obj->cdev);
	return 0;
}

static int int3403_add(struct platform_device *pdev)
{
	struct int3403_priv *priv;
	int result = 0;
	acpi_status status;

	priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
			    GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->pdev = pdev;
	priv->adev = ACPI_COMPANION(&(pdev->dev));
	if (!priv->adev) {
		result = -EINVAL;
		goto err;
	}

	status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
				       NULL, &priv->type);
	if (ACPI_FAILURE(status)) {
		result = -EINVAL;
		goto err;
	}

	platform_set_drvdata(pdev, priv);
	switch (priv->type) {
	case INT3403_TYPE_SENSOR:
		result = int3403_sensor_add(priv);
		break;
	case INT3403_TYPE_CHARGER:
	case INT3403_TYPE_BATTERY:
		result = int3403_cdev_add(priv);
		break;
	default:
		result = -EINVAL;
	}

	if (result)
		goto err;
	return result;

err:
	return result;
}

static int int3403_remove(struct platform_device *pdev)
{
	struct int3403_priv *priv = platform_get_drvdata(pdev);

	switch (priv->type) {
	case INT3403_TYPE_SENSOR:
		int3403_sensor_remove(priv);
		break;
	case INT3403_TYPE_CHARGER:
	case INT3403_TYPE_BATTERY:
		int3403_cdev_remove(priv);
		break;
	default:
		break;
	}

	return 0;
}

static const struct acpi_device_id int3403_device_ids[] = {
	{"INT3403", 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, int3403_device_ids);

static struct platform_driver int3403_driver = {
	.probe = int3403_add,
	.remove = int3403_remove,
	.driver = {
		.name = "int3403 thermal",
		.acpi_match_table = int3403_device_ids,
	},
};

module_platform_driver(int3403_driver);

MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ACPI INT3403 thermal driver");
Commit	Line	Data
4384b8fe LT	1	/*
	2	* ACPI INT3403 thermal driver
	3	* Copyright (c) 2013, Intel Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*/
	14
	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
	17	#include <linux/init.h>
	18	#include <linux/types.h>
	19	#include <linux/acpi.h>
	20	#include <linux/thermal.h>
	21	#include <linux/platform_device.h>
	22
	23	#define INT3403_TYPE_SENSOR 0x03
	24	#define INT3403_TYPE_CHARGER 0x0B
	25	#define INT3403_TYPE_BATTERY 0x0C
	26	#define INT3403_PERF_CHANGED_EVENT 0x80
	27	#define INT3403_THERMAL_EVENT 0x90
	28
	29	#define DECI_KELVIN_TO_MILLI_CELSIUS(t, off) (((t) - (off)) * 100)
	30	#define KELVIN_OFFSET 2732
	31	#define MILLI_CELSIUS_TO_DECI_KELVIN(t, off) (((t) / 100) + (off))
	32
	33	struct int3403_sensor {
	34	struct thermal_zone_device *tzone;
	35	unsigned long *thresholds;
	36	unsigned long crit_temp;
	37	int crit_trip_id;
	38	unsigned long psv_temp;
	39	int psv_trip_id;
	40
	41	};
	42
	43	struct int3403_performance_state {
	44	u64 performance;
	45	u64 power;
	46	u64 latency;
	47	u64 linear;
	48	u64 control;
	49	u64 raw_performace;
	50	char *raw_unit;
	51	int reserved;
	52	};
	53
	54	struct int3403_cdev {
	55	struct thermal_cooling_device *cdev;
	56	unsigned long max_state;
	57	};
	58
	59	struct int3403_priv {
	60	struct platform_device *pdev;
	61	struct acpi_device *adev;
	62	unsigned long long type;
	63	void *priv;
	64	};
65
66	static int sys_get_curr_temp(struct thermal_zone_device *tzone,
67	unsigned long *temp)
68	{
69	struct int3403_priv *priv = tzone->devdata;
70	struct acpi_device *device = priv->adev;
71	unsigned long long tmp;
72	acpi_status status;
73
74	status = acpi_evaluate_integer(device->handle, "_TMP", NULL, &tmp);
75	if (ACPI_FAILURE(status))
76	return -EIO;
77
78	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(tmp, KELVIN_OFFSET);
79
80	return 0;
81	}
82
83	static int sys_get_trip_hyst(struct thermal_zone_device *tzone,
84	int trip, unsigned long *temp)
85	{
86	struct int3403_priv *priv = tzone->devdata;
87	struct acpi_device *device = priv->adev;
88	unsigned long long hyst;
89	acpi_status status;
90
91	status = acpi_evaluate_integer(device->handle, "GTSH", NULL, &hyst);
92	if (ACPI_FAILURE(status))
93	return -EIO;
94
225112a5 T	95	/*
	96	* Thermal hysteresis represents a temperature difference.
	97	* Kelvin and Celsius have same degree size. So the
	98	* conversion here between tenths of degree Kelvin unit
	99	* and Milli-Celsius unit is just to multiply 100.
	100	*/
	101	temp = hyst 100;
4384b8fe LT	102
	103	return 0;
	104	}
	105
	106	static int sys_get_trip_temp(struct thermal_zone_device *tzone,
	107	int trip, unsigned long *temp)
	108	{
	109	struct int3403_priv *priv = tzone->devdata;
	110	struct int3403_sensor *obj = priv->priv;
	111
	112	if (priv->type != INT3403_TYPE_SENSOR \|\| !obj)
	113	return -EINVAL;
	114
	115	if (trip == obj->crit_trip_id)
	116	*temp = obj->crit_temp;
	117	else if (trip == obj->psv_trip_id)
	118	*temp = obj->psv_temp;
	119	else {
	120	/*
	121	* get_trip_temp is a mandatory callback but
	122	* PATx method doesn't return any value, so return
	123	* cached value, which was last set from user space
	124	*/
	125	*temp = obj->thresholds[trip];
	126	}
	127
	128	return 0;
	129	}
	130
	131	static int sys_get_trip_type(struct thermal_zone_device *thermal,
	132	int trip, enum thermal_trip_type *type)
	133	{
	134	struct int3403_priv *priv = thermal->devdata;
	135	struct int3403_sensor *obj = priv->priv;
	136
	137	/* Mandatory callback, may not mean much here */
	138	if (trip == obj->crit_trip_id)
	139	*type = THERMAL_TRIP_CRITICAL;
	140	else
	141	*type = THERMAL_TRIP_PASSIVE;
	142
	143	return 0;
	144	}
	145
	146	int sys_set_trip_temp(struct thermal_zone_device *tzone, int trip,
	147	unsigned long temp)
	148	{
	149	struct int3403_priv *priv = tzone->devdata;
	150	struct acpi_device *device = priv->adev;
	151	struct int3403_sensor *obj = priv->priv;
	152	acpi_status status;
	153	char name[10];
	154	int ret = 0;
	155
	156	snprintf(name, sizeof(name), "PAT%d", trip);
	157	if (acpi_has_method(device->handle, name)) {
	158	status = acpi_execute_simple_method(device->handle, name,
	159	MILLI_CELSIUS_TO_DECI_KELVIN(temp,
	160	KELVIN_OFFSET));
	161	if (ACPI_FAILURE(status))
	162	ret = -EIO;
	163	else
	164	obj->thresholds[trip] = temp;
	165	} else {
166	ret = -EIO;
167	dev_err(&device->dev, "sys_set_trip_temp: method not found\n");
168	}
169
170	return ret;
171	}
172
173	static struct thermal_zone_device_ops tzone_ops = {
174	.get_temp = sys_get_curr_temp,
175	.get_trip_temp = sys_get_trip_temp,
176	.get_trip_type = sys_get_trip_type,
177	.set_trip_temp = sys_set_trip_temp,
178	.get_trip_hyst = sys_get_trip_hyst,
179	};
180
181	static struct thermal_zone_params int3403_thermal_params = {
182	.governor_name = "user_space",
183	.no_hwmon = true,
184	};
185
186	static void int3403_notify(acpi_handle handle,
187	u32 event, void *data)
188	{
189	struct int3403_priv *priv = data;
190	struct int3403_sensor *obj;
191
192	if (!priv)
193	return;
194
195	obj = priv->priv;
196	if (priv->type != INT3403_TYPE_SENSOR \|\| !obj)
197	return;
198
199	switch (event) {
200	case INT3403_PERF_CHANGED_EVENT:
201	break;
202	case INT3403_THERMAL_EVENT:
203	thermal_zone_device_update(obj->tzone);
204	break;
205	default:
206	dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
207	break;
208	}
209	}
210
211	static int sys_get_trip_crt(struct acpi_device device, unsigned long temp)
212	{
213	unsigned long long crt;
214	acpi_status status;
215
216	status = acpi_evaluate_integer(device->handle, "_CRT", NULL, &crt);
217	if (ACPI_FAILURE(status))
218	return -EIO;
219
220	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(crt, KELVIN_OFFSET);
221
222	return 0;
223	}
224
225	static int sys_get_trip_psv(struct acpi_device device, unsigned long temp)
226	{
227	unsigned long long psv;
228	acpi_status status;
229
230	status = acpi_evaluate_integer(device->handle, "_PSV", NULL, &psv);
231	if (ACPI_FAILURE(status))
232	return -EIO;
233
234	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(psv, KELVIN_OFFSET);
235
236	return 0;
237	}
238
239	static int int3403_sensor_add(struct int3403_priv *priv)
240	{
241	int result = 0;
242	acpi_status status;
243	struct int3403_sensor *obj;
244	unsigned long long trip_cnt;
245	int trip_mask = 0;
246
247	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
248	if (!obj)
249	return -ENOMEM;
250
251	priv->priv = obj;
252
253	status = acpi_evaluate_integer(priv->adev->handle, "PATC", NULL,
254	&trip_cnt);
255	if (ACPI_FAILURE(status))
256	trip_cnt = 0;
257
258	if (trip_cnt) {
259	/* We have to cache, thresholds can't be readback */
260	obj->thresholds = devm_kzalloc(&priv->pdev->dev,
261	sizeof(obj->thresholds) trip_cnt,
262	GFP_KERNEL);
263	if (!obj->thresholds) {
264	result = -ENOMEM;
265	goto err_free_obj;
266	}
267	trip_mask = BIT(trip_cnt) - 1;
268	}
269
270	obj->psv_trip_id = -1;
271	if (!sys_get_trip_psv(priv->adev, &obj->psv_temp))
272	obj->psv_trip_id = trip_cnt++;
273
274	obj->crit_trip_id = -1;
275	if (!sys_get_trip_crt(priv->adev, &obj->crit_temp))
276	obj->crit_trip_id = trip_cnt++;
277
278	obj->tzone = thermal_zone_device_register(acpi_device_bid(priv->adev),
279	trip_cnt, trip_mask, priv, &tzone_ops,
280	&int3403_thermal_params, 0, 0);
281	if (IS_ERR(obj->tzone)) {
282	result = PTR_ERR(obj->tzone);
283	obj->tzone = NULL;
284	goto err_free_obj;
285	}
286
287	result = acpi_install_notify_handler(priv->adev->handle,
288	ACPI_DEVICE_NOTIFY, int3403_notify,
289	(void *)priv);
290	if (result)
291	goto err_free_obj;
292
293	return 0;
294
295	err_free_obj:
931b9c86	296	thermal_zone_device_unregister(obj->tzone);
4384b8fe LT	297	return result;
	298	}
	299
	300	static int int3403_sensor_remove(struct int3403_priv *priv)
	301	{
	302	struct int3403_sensor *obj = priv->priv;
	303
	304	thermal_zone_device_unregister(obj->tzone);
	305	return 0;
	306	}
	307
	308	/* INT3403 Cooling devices */
	309	static int int3403_get_max_state(struct thermal_cooling_device *cdev,
	310	unsigned long *state)
	311	{
	312	struct int3403_priv *priv = cdev->devdata;
	313	struct int3403_cdev *obj = priv->priv;
	314
	315	*state = obj->max_state;
	316	return 0;
	317	}
	318
	319	static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
	320	unsigned long *state)
	321	{
	322	struct int3403_priv *priv = cdev->devdata;
	323	unsigned long long level;
	324	acpi_status status;
	325
	326	status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
	327	if (ACPI_SUCCESS(status)) {
	328	*state = level;
	329	return 0;
	330	} else
	331	return -EINVAL;
	332	}
	333
	334	static int
	335	int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
	336	{
	337	struct int3403_priv *priv = cdev->devdata;
	338	acpi_status status;
	339
	340	status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
	341	if (ACPI_SUCCESS(status))
	342	return 0;
	343	else
	344	return -EINVAL;
	345	}
	346
	347	static const struct thermal_cooling_device_ops int3403_cooling_ops = {
	348	.get_max_state = int3403_get_max_state,
	349	.get_cur_state = int3403_get_cur_state,
	350	.set_cur_state = int3403_set_cur_state,
	351	};
	352
	353	static int int3403_cdev_add(struct int3403_priv *priv)
	354	{
	355	int result = 0;
	356	acpi_status status;
	357	struct int3403_cdev *obj;
	358	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
	359	union acpi_object *p;
	360
361	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
362	if (!obj)
363	return -ENOMEM;
364
365	status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
366	if (ACPI_FAILURE(status))
367	return -ENODEV;
368
369	p = buf.pointer;
370	if (!p \|\| (p->type != ACPI_TYPE_PACKAGE)) {
371	printk(KERN_WARNING "Invalid PPSS data\n");
f01bc8f3	372	kfree(buf.pointer);
4384b8fe LT	373	return -EFAULT;
	374	}
	375
	376	obj->max_state = p->package.count - 1;
	377	obj->cdev =
	378	thermal_cooling_device_register(acpi_device_bid(priv->adev),
	379	priv, &int3403_cooling_ops);
	380	if (IS_ERR(obj->cdev))
	381	result = PTR_ERR(obj->cdev);
	382
	383	priv->priv = obj;
	384
f01bc8f3	385	kfree(buf.pointer);
4384b8fe LT	386	/* TODO: add ACPI notification support */
	387
	388	return result;
	389	}
	390
	391	static int int3403_cdev_remove(struct int3403_priv *priv)
	392	{
	393	struct int3403_cdev *obj = priv->priv;
	394
	395	thermal_cooling_device_unregister(obj->cdev);
	396	return 0;
	397	}
	398
	399	static int int3403_add(struct platform_device *pdev)
	400	{
	401	struct int3403_priv *priv;
	402	int result = 0;
	403	acpi_status status;
	404
	405	priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
	406	GFP_KERNEL);
	407	if (!priv)
	408	return -ENOMEM;
	409
	410	priv->pdev = pdev;
	411	priv->adev = ACPI_COMPANION(&(pdev->dev));
	412	if (!priv->adev) {
	413	result = -EINVAL;
	414	goto err;
	415	}
	416
	417	status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
	418	NULL, &priv->type);
	419	if (ACPI_FAILURE(status)) {
	420	result = -EINVAL;
	421	goto err;
	422	}
	423
	424	platform_set_drvdata(pdev, priv);
	425	switch (priv->type) {
	426	case INT3403_TYPE_SENSOR:
	427	result = int3403_sensor_add(priv);
	428	break;
	429	case INT3403_TYPE_CHARGER:
	430	case INT3403_TYPE_BATTERY:
	431	result = int3403_cdev_add(priv);
	432	break;
	433	default:
	434	result = -EINVAL;
	435	}
	436
	437	if (result)
	438	goto err;
	439	return result;
	440
	441	err:
	442	return result;
	443	}
	444
	445	static int int3403_remove(struct platform_device *pdev)
	446	{
	447	struct int3403_priv *priv = platform_get_drvdata(pdev);
	448
	449	switch (priv->type) {
450	case INT3403_TYPE_SENSOR:
451	int3403_sensor_remove(priv);
452	break;
453	case INT3403_TYPE_CHARGER:
454	case INT3403_TYPE_BATTERY:
455	int3403_cdev_remove(priv);
456	break;
457	default:
458	break;
459	}
460
461	return 0;
462	}
463
464	static const struct acpi_device_id int3403_device_ids[] = {
465	{"INT3403", 0},
466	{"", 0},
467	};
468	MODULE_DEVICE_TABLE(acpi, int3403_device_ids);
469
470	static struct platform_driver int3403_driver = {
471	.probe = int3403_add,
472	.remove = int3403_remove,
473	.driver = {
474	.name = "int3403 thermal",
4384b8fe LT	475	.acpi_match_table = int3403_device_ids,
	476	},
	477	};
	478
	479	module_platform_driver(int3403_driver);
	480
	481	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
	482	MODULE_LICENSE("GPL v2");
	483	MODULE_DESCRIPTION("ACPI INT3403 thermal driver");