2 * ACPI INT3403 thermal driver
3 * Copyright (c) 2013, Intel Corporation.
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.
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
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>
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
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))
33 struct int3403_sensor {
34 struct thermal_zone_device *tzone;
35 unsigned long *thresholds;
36 unsigned long crit_temp;
38 unsigned long psv_temp;
43 struct int3403_performance_state {
55 struct thermal_cooling_device *cdev;
56 unsigned long max_state;
60 struct platform_device *pdev;
61 struct acpi_device *adev;
62 unsigned long long type;
66 static int sys_get_curr_temp(struct thermal_zone_device *tzone,
69 struct int3403_priv *priv = tzone->devdata;
70 struct acpi_device *device = priv->adev;
71 unsigned long long tmp;
74 status = acpi_evaluate_integer(device->handle, "_TMP", NULL, &tmp);
75 if (ACPI_FAILURE(status))
78 *temp = DECI_KELVIN_TO_MILLI_CELSIUS(tmp, KELVIN_OFFSET);
83 static int sys_get_trip_hyst(struct thermal_zone_device *tzone,
84 int trip, unsigned long *temp)
86 struct int3403_priv *priv = tzone->devdata;
87 struct acpi_device *device = priv->adev;
88 unsigned long long hyst;
91 status = acpi_evaluate_integer(device->handle, "GTSH", NULL, &hyst);
92 if (ACPI_FAILURE(status))
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.
106 static int sys_get_trip_temp(struct thermal_zone_device *tzone,
107 int trip, unsigned long *temp)
109 struct int3403_priv *priv = tzone->devdata;
110 struct int3403_sensor *obj = priv->priv;
112 if (priv->type != INT3403_TYPE_SENSOR || !obj)
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;
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
125 *temp = obj->thresholds[trip];
131 static int sys_get_trip_type(struct thermal_zone_device *thermal,
132 int trip, enum thermal_trip_type *type)
134 struct int3403_priv *priv = thermal->devdata;
135 struct int3403_sensor *obj = priv->priv;
137 /* Mandatory callback, may not mean much here */
138 if (trip == obj->crit_trip_id)
139 *type = THERMAL_TRIP_CRITICAL;
141 *type = THERMAL_TRIP_PASSIVE;
146 int sys_set_trip_temp(struct thermal_zone_device *tzone, int trip,
149 struct int3403_priv *priv = tzone->devdata;
150 struct acpi_device *device = priv->adev;
151 struct int3403_sensor *obj = priv->priv;
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,
161 if (ACPI_FAILURE(status))
164 obj->thresholds[trip] = temp;
167 dev_err(&device->dev, "sys_set_trip_temp: method not found\n");
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,
181 static struct thermal_zone_params int3403_thermal_params = {
182 .governor_name = "user_space",
186 static void int3403_notify(acpi_handle handle,
187 u32 event, void *data)
189 struct int3403_priv *priv = data;
190 struct int3403_sensor *obj;
196 if (priv->type != INT3403_TYPE_SENSOR || !obj)
200 case INT3403_PERF_CHANGED_EVENT:
202 case INT3403_THERMAL_EVENT:
203 thermal_zone_device_update(obj->tzone);
206 dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
211 static int sys_get_trip_crt(struct acpi_device *device, unsigned long *temp)
213 unsigned long long crt;
216 status = acpi_evaluate_integer(device->handle, "_CRT", NULL, &crt);
217 if (ACPI_FAILURE(status))
220 *temp = DECI_KELVIN_TO_MILLI_CELSIUS(crt, KELVIN_OFFSET);
225 static int sys_get_trip_psv(struct acpi_device *device, unsigned long *temp)
227 unsigned long long psv;
230 status = acpi_evaluate_integer(device->handle, "_PSV", NULL, &psv);
231 if (ACPI_FAILURE(status))
234 *temp = DECI_KELVIN_TO_MILLI_CELSIUS(psv, KELVIN_OFFSET);
239 static int int3403_sensor_add(struct int3403_priv *priv)
243 struct int3403_sensor *obj;
244 unsigned long long trip_cnt;
247 obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
253 status = acpi_evaluate_integer(priv->adev->handle, "PATC", NULL,
255 if (ACPI_FAILURE(status))
259 /* We have to cache, thresholds can't be readback */
260 obj->thresholds = devm_kzalloc(&priv->pdev->dev,
261 sizeof(*obj->thresholds) * trip_cnt,
263 if (!obj->thresholds) {
267 trip_mask = BIT(trip_cnt) - 1;
270 obj->psv_trip_id = -1;
271 if (!sys_get_trip_psv(priv->adev, &obj->psv_temp))
272 obj->psv_trip_id = trip_cnt++;
274 obj->crit_trip_id = -1;
275 if (!sys_get_trip_crt(priv->adev, &obj->crit_temp))
276 obj->crit_trip_id = trip_cnt++;
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);
287 result = acpi_install_notify_handler(priv->adev->handle,
288 ACPI_DEVICE_NOTIFY, int3403_notify,
296 thermal_zone_device_unregister(obj->tzone);
300 static int int3403_sensor_remove(struct int3403_priv *priv)
302 struct int3403_sensor *obj = priv->priv;
304 acpi_remove_notify_handler(priv->adev->handle,
305 ACPI_DEVICE_NOTIFY, int3403_notify);
306 thermal_zone_device_unregister(obj->tzone);
310 /* INT3403 Cooling devices */
311 static int int3403_get_max_state(struct thermal_cooling_device *cdev,
312 unsigned long *state)
314 struct int3403_priv *priv = cdev->devdata;
315 struct int3403_cdev *obj = priv->priv;
317 *state = obj->max_state;
321 static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
322 unsigned long *state)
324 struct int3403_priv *priv = cdev->devdata;
325 unsigned long long level;
328 status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
329 if (ACPI_SUCCESS(status)) {
337 int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
339 struct int3403_priv *priv = cdev->devdata;
342 status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
343 if (ACPI_SUCCESS(status))
349 static const struct thermal_cooling_device_ops int3403_cooling_ops = {
350 .get_max_state = int3403_get_max_state,
351 .get_cur_state = int3403_get_cur_state,
352 .set_cur_state = int3403_set_cur_state,
355 static int int3403_cdev_add(struct int3403_priv *priv)
359 struct int3403_cdev *obj;
360 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
361 union acpi_object *p;
363 obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
367 status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
368 if (ACPI_FAILURE(status))
372 if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
373 printk(KERN_WARNING "Invalid PPSS data\n");
378 obj->max_state = p->package.count - 1;
380 thermal_cooling_device_register(acpi_device_bid(priv->adev),
381 priv, &int3403_cooling_ops);
382 if (IS_ERR(obj->cdev))
383 result = PTR_ERR(obj->cdev);
388 /* TODO: add ACPI notification support */
393 static int int3403_cdev_remove(struct int3403_priv *priv)
395 struct int3403_cdev *obj = priv->priv;
397 thermal_cooling_device_unregister(obj->cdev);
401 static int int3403_add(struct platform_device *pdev)
403 struct int3403_priv *priv;
407 priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
413 priv->adev = ACPI_COMPANION(&(pdev->dev));
419 status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
421 if (ACPI_FAILURE(status)) {
426 platform_set_drvdata(pdev, priv);
427 switch (priv->type) {
428 case INT3403_TYPE_SENSOR:
429 result = int3403_sensor_add(priv);
431 case INT3403_TYPE_CHARGER:
432 case INT3403_TYPE_BATTERY:
433 result = int3403_cdev_add(priv);
447 static int int3403_remove(struct platform_device *pdev)
449 struct int3403_priv *priv = platform_get_drvdata(pdev);
451 switch (priv->type) {
452 case INT3403_TYPE_SENSOR:
453 int3403_sensor_remove(priv);
455 case INT3403_TYPE_CHARGER:
456 case INT3403_TYPE_BATTERY:
457 int3403_cdev_remove(priv);
466 static const struct acpi_device_id int3403_device_ids[] = {
470 MODULE_DEVICE_TABLE(acpi, int3403_device_ids);
472 static struct platform_driver int3403_driver = {
473 .probe = int3403_add,
474 .remove = int3403_remove,
476 .name = "int3403 thermal",
477 .acpi_match_table = int3403_device_ids,
481 module_platform_driver(int3403_driver);
483 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
484 MODULE_LICENSE("GPL v2");
485 MODULE_DESCRIPTION("ACPI INT3403 thermal driver");