Commit | Line | Data |
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7e3c0381 | 1 | // SPDX-License-Identifier: GPL-2.0 |
4e5e4705 EV |
2 | /* |
3 | * of-thermal.c - Generic Thermal Management device tree support. | |
4 | * | |
5 | * Copyright (C) 2013 Texas Instruments | |
6 | * Copyright (C) 2013 Eduardo Valentin <eduardo.valentin@ti.com> | |
4e5e4705 | 7 | */ |
7ffd87c6 YL |
8 | |
9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
10 | ||
4e5e4705 EV |
11 | #include <linux/err.h> |
12 | #include <linux/export.h> | |
2b61314e AK |
13 | #include <linux/of_device.h> |
14 | #include <linux/of_platform.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/thermal.h> | |
17 | #include <linux/types.h> | |
4e5e4705 EV |
18 | #include <linux/string.h> |
19 | ||
20 | #include "thermal_core.h" | |
21 | ||
22 | /*** Private data structures to represent thermal device tree data ***/ | |
23 | ||
4e5e4705 | 24 | /** |
a92bab89 | 25 | * struct __thermal_cooling_bind_param - a cooling device for a trip point |
4e5e4705 | 26 | * @cooling_device: a pointer to identify the referred cooling device |
4e5e4705 EV |
27 | * @min: minimum cooling state used at this trip point |
28 | * @max: maximum cooling state used at this trip point | |
29 | */ | |
30 | ||
a92bab89 | 31 | struct __thermal_cooling_bind_param { |
4e5e4705 | 32 | struct device_node *cooling_device; |
4e5e4705 EV |
33 | unsigned long min; |
34 | unsigned long max; | |
35 | }; | |
36 | ||
a92bab89 | 37 | /** |
44b965d8 | 38 | * struct __thermal_bind_params - a match between trip and cooling device |
a92bab89 VK |
39 | * @tcbp: a pointer to an array of cooling devices |
40 | * @count: number of elements in array | |
41 | * @trip_id: the trip point index | |
42 | * @usage: the percentage (from 0 to 100) of cooling contribution | |
43 | */ | |
44 | ||
45 | struct __thermal_bind_params { | |
46 | struct __thermal_cooling_bind_param *tcbp; | |
47 | unsigned int count; | |
48 | unsigned int trip_id; | |
49 | unsigned int usage; | |
50 | }; | |
51 | ||
4e5e4705 EV |
52 | /** |
53 | * struct __thermal_zone - internal representation of a thermal zone | |
4e5e4705 EV |
54 | * @passive_delay: polling interval while passive cooling is activated |
55 | * @polling_delay: zone polling interval | |
a46dbae8 EV |
56 | * @slope: slope of the temperature adjustment curve |
57 | * @offset: offset of the temperature adjustment curve | |
4e5e4705 EV |
58 | * @ntrips: number of trip points |
59 | * @trips: an array of trip points (0..ntrips - 1) | |
60 | * @num_tbps: number of thermal bind params | |
61 | * @tbps: an array of thermal bind params (0..num_tbps - 1) | |
62 | * @sensor_data: sensor private data used while reading temperature and trend | |
2251aef6 | 63 | * @ops: set of callbacks to handle the thermal zone based on DT |
4e5e4705 EV |
64 | */ |
65 | ||
66 | struct __thermal_zone { | |
4e5e4705 EV |
67 | int passive_delay; |
68 | int polling_delay; | |
a46dbae8 EV |
69 | int slope; |
70 | int offset; | |
4e5e4705 EV |
71 | |
72 | /* trip data */ | |
73 | int ntrips; | |
ad9914ac | 74 | struct thermal_trip *trips; |
4e5e4705 EV |
75 | |
76 | /* cooling binding data */ | |
77 | int num_tbps; | |
78 | struct __thermal_bind_params *tbps; | |
79 | ||
80 | /* sensor interface */ | |
81 | void *sensor_data; | |
2251aef6 | 82 | const struct thermal_zone_of_device_ops *ops; |
4e5e4705 EV |
83 | }; |
84 | ||
85 | /*** DT thermal zone device callbacks ***/ | |
86 | ||
87 | static int of_thermal_get_temp(struct thermal_zone_device *tz, | |
17e8351a | 88 | int *temp) |
4e5e4705 EV |
89 | { |
90 | struct __thermal_zone *data = tz->devdata; | |
91 | ||
96cfe050 | 92 | if (!data->ops || !data->ops->get_temp) |
4e5e4705 EV |
93 | return -EINVAL; |
94 | ||
2251aef6 | 95 | return data->ops->get_temp(data->sensor_data, temp); |
4e5e4705 EV |
96 | } |
97 | ||
826386e7 SH |
98 | static int of_thermal_set_trips(struct thermal_zone_device *tz, |
99 | int low, int high) | |
100 | { | |
101 | struct __thermal_zone *data = tz->devdata; | |
102 | ||
103 | if (!data->ops || !data->ops->set_trips) | |
104 | return -EINVAL; | |
105 | ||
106 | return data->ops->set_trips(data->sensor_data, low, high); | |
107 | } | |
108 | ||
08dab66e LM |
109 | /** |
110 | * of_thermal_get_ntrips - function to export number of available trip | |
111 | * points. | |
112 | * @tz: pointer to a thermal zone | |
113 | * | |
114 | * This function is a globally visible wrapper to get number of trip points | |
115 | * stored in the local struct __thermal_zone | |
116 | * | |
117 | * Return: number of available trip points, -ENODEV when data not available | |
118 | */ | |
119 | int of_thermal_get_ntrips(struct thermal_zone_device *tz) | |
120 | { | |
14ccb5ed | 121 | return tz->num_trips; |
08dab66e LM |
122 | } |
123 | EXPORT_SYMBOL_GPL(of_thermal_get_ntrips); | |
124 | ||
a9bf2cc4 LM |
125 | /** |
126 | * of_thermal_is_trip_valid - function to check if trip point is valid | |
127 | * | |
128 | * @tz: pointer to a thermal zone | |
129 | * @trip: trip point to evaluate | |
130 | * | |
131 | * This function is responsible for checking if passed trip point is valid | |
132 | * | |
133 | * Return: true if trip point is valid, false otherwise | |
134 | */ | |
135 | bool of_thermal_is_trip_valid(struct thermal_zone_device *tz, int trip) | |
136 | { | |
14ccb5ed | 137 | if (trip >= tz->num_trips || trip < 0) |
a9bf2cc4 LM |
138 | return false; |
139 | ||
140 | return true; | |
141 | } | |
142 | EXPORT_SYMBOL_GPL(of_thermal_is_trip_valid); | |
143 | ||
ce8be778 LM |
144 | /** |
145 | * of_thermal_get_trip_points - function to get access to a globally exported | |
146 | * trip points | |
147 | * | |
148 | * @tz: pointer to a thermal zone | |
149 | * | |
150 | * This function provides a pointer to trip points table | |
151 | * | |
152 | * Return: pointer to trip points table, NULL otherwise | |
153 | */ | |
ebc3193a | 154 | const struct thermal_trip * |
ce8be778 LM |
155 | of_thermal_get_trip_points(struct thermal_zone_device *tz) |
156 | { | |
14ccb5ed | 157 | return tz->trips; |
ce8be778 LM |
158 | } |
159 | EXPORT_SYMBOL_GPL(of_thermal_get_trip_points); | |
160 | ||
184a4bf6 LM |
161 | /** |
162 | * of_thermal_set_emul_temp - function to set emulated temperature | |
163 | * | |
164 | * @tz: pointer to a thermal zone | |
165 | * @temp: temperature to set | |
166 | * | |
167 | * This function gives the ability to set emulated value of temperature, | |
168 | * which is handy for debugging | |
169 | * | |
170 | * Return: zero on success, error code otherwise | |
171 | */ | |
172 | static int of_thermal_set_emul_temp(struct thermal_zone_device *tz, | |
17e8351a | 173 | int temp) |
184a4bf6 LM |
174 | { |
175 | struct __thermal_zone *data = tz->devdata; | |
176 | ||
96cfe050 SN |
177 | if (!data->ops || !data->ops->set_emul_temp) |
178 | return -EINVAL; | |
179 | ||
184a4bf6 LM |
180 | return data->ops->set_emul_temp(data->sensor_data, temp); |
181 | } | |
182 | ||
4e5e4705 EV |
183 | static int of_thermal_get_trend(struct thermal_zone_device *tz, int trip, |
184 | enum thermal_trend *trend) | |
185 | { | |
186 | struct __thermal_zone *data = tz->devdata; | |
4e5e4705 | 187 | |
96cfe050 | 188 | if (!data->ops || !data->ops->get_trend) |
4e5e4705 EV |
189 | return -EINVAL; |
190 | ||
e78eaf45 | 191 | return data->ops->get_trend(data->sensor_data, trip, trend); |
4e5e4705 EV |
192 | } |
193 | ||
bf70c577 MMP |
194 | static int of_thermal_change_mode(struct thermal_zone_device *tz, |
195 | enum thermal_device_mode mode) | |
196 | { | |
197 | struct __thermal_zone *data = tz->devdata; | |
198 | ||
199 | return data->ops->change_mode(data->sensor_data, mode); | |
200 | } | |
201 | ||
4e5e4705 EV |
202 | static int of_thermal_bind(struct thermal_zone_device *thermal, |
203 | struct thermal_cooling_device *cdev) | |
204 | { | |
205 | struct __thermal_zone *data = thermal->devdata; | |
a92bab89 VK |
206 | struct __thermal_bind_params *tbp; |
207 | struct __thermal_cooling_bind_param *tcbp; | |
208 | int i, j; | |
4e5e4705 EV |
209 | |
210 | if (!data || IS_ERR(data)) | |
211 | return -ENODEV; | |
212 | ||
213 | /* find where to bind */ | |
214 | for (i = 0; i < data->num_tbps; i++) { | |
a92bab89 | 215 | tbp = data->tbps + i; |
4e5e4705 | 216 | |
a92bab89 VK |
217 | for (j = 0; j < tbp->count; j++) { |
218 | tcbp = tbp->tcbp + j; | |
4e5e4705 | 219 | |
a92bab89 VK |
220 | if (tcbp->cooling_device == cdev->np) { |
221 | int ret; | |
222 | ||
223 | ret = thermal_zone_bind_cooling_device(thermal, | |
4e5e4705 | 224 | tbp->trip_id, cdev, |
a92bab89 VK |
225 | tcbp->max, |
226 | tcbp->min, | |
6cd9e9f6 | 227 | tbp->usage); |
a92bab89 VK |
228 | if (ret) |
229 | return ret; | |
230 | } | |
4e5e4705 EV |
231 | } |
232 | } | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int of_thermal_unbind(struct thermal_zone_device *thermal, | |
238 | struct thermal_cooling_device *cdev) | |
239 | { | |
240 | struct __thermal_zone *data = thermal->devdata; | |
a92bab89 VK |
241 | struct __thermal_bind_params *tbp; |
242 | struct __thermal_cooling_bind_param *tcbp; | |
243 | int i, j; | |
4e5e4705 EV |
244 | |
245 | if (!data || IS_ERR(data)) | |
246 | return -ENODEV; | |
247 | ||
248 | /* find where to unbind */ | |
249 | for (i = 0; i < data->num_tbps; i++) { | |
a92bab89 VK |
250 | tbp = data->tbps + i; |
251 | ||
252 | for (j = 0; j < tbp->count; j++) { | |
253 | tcbp = tbp->tcbp + j; | |
4e5e4705 | 254 | |
a92bab89 VK |
255 | if (tcbp->cooling_device == cdev->np) { |
256 | int ret; | |
4e5e4705 | 257 | |
a92bab89 VK |
258 | ret = thermal_zone_unbind_cooling_device(thermal, |
259 | tbp->trip_id, cdev); | |
260 | if (ret) | |
261 | return ret; | |
262 | } | |
4e5e4705 EV |
263 | } |
264 | } | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
4e5e4705 EV |
269 | static int of_thermal_get_trip_type(struct thermal_zone_device *tz, int trip, |
270 | enum thermal_trip_type *type) | |
271 | { | |
14ccb5ed | 272 | if (trip >= tz->num_trips || trip < 0) |
4e5e4705 EV |
273 | return -EDOM; |
274 | ||
14ccb5ed | 275 | *type = tz->trips[trip].type; |
4e5e4705 EV |
276 | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static int of_thermal_get_trip_temp(struct thermal_zone_device *tz, int trip, | |
17e8351a | 281 | int *temp) |
4e5e4705 | 282 | { |
14ccb5ed | 283 | if (trip >= tz->num_trips || trip < 0) |
4e5e4705 EV |
284 | return -EDOM; |
285 | ||
14ccb5ed | 286 | *temp = tz->trips[trip].temperature; |
4e5e4705 EV |
287 | |
288 | return 0; | |
289 | } | |
290 | ||
291 | static int of_thermal_set_trip_temp(struct thermal_zone_device *tz, int trip, | |
17e8351a | 292 | int temp) |
4e5e4705 EV |
293 | { |
294 | struct __thermal_zone *data = tz->devdata; | |
295 | ||
14ccb5ed | 296 | if (trip >= tz->num_trips || trip < 0) |
4e5e4705 EV |
297 | return -EDOM; |
298 | ||
96cfe050 | 299 | if (data->ops && data->ops->set_trip_temp) { |
c3509521 WN |
300 | int ret; |
301 | ||
302 | ret = data->ops->set_trip_temp(data->sensor_data, trip, temp); | |
303 | if (ret) | |
304 | return ret; | |
305 | } | |
306 | ||
4e5e4705 | 307 | /* thermal framework should take care of data->mask & (1 << trip) */ |
14ccb5ed | 308 | tz->trips[trip].temperature = temp; |
4e5e4705 EV |
309 | |
310 | return 0; | |
311 | } | |
312 | ||
313 | static int of_thermal_get_trip_hyst(struct thermal_zone_device *tz, int trip, | |
17e8351a | 314 | int *hyst) |
4e5e4705 | 315 | { |
14ccb5ed | 316 | if (trip >= tz->num_trips || trip < 0) |
4e5e4705 EV |
317 | return -EDOM; |
318 | ||
14ccb5ed | 319 | *hyst = tz->trips[trip].hysteresis; |
4e5e4705 EV |
320 | |
321 | return 0; | |
322 | } | |
323 | ||
324 | static int of_thermal_set_trip_hyst(struct thermal_zone_device *tz, int trip, | |
17e8351a | 325 | int hyst) |
4e5e4705 | 326 | { |
14ccb5ed | 327 | if (trip >= tz->num_trips || trip < 0) |
4e5e4705 EV |
328 | return -EDOM; |
329 | ||
330 | /* thermal framework should take care of data->mask & (1 << trip) */ | |
14ccb5ed | 331 | tz->trips[trip].hysteresis = hyst; |
4e5e4705 EV |
332 | |
333 | return 0; | |
334 | } | |
335 | ||
336 | static int of_thermal_get_crit_temp(struct thermal_zone_device *tz, | |
17e8351a | 337 | int *temp) |
4e5e4705 | 338 | { |
4e5e4705 EV |
339 | int i; |
340 | ||
14ccb5ed DL |
341 | for (i = 0; i < tz->num_trips; i++) |
342 | if (tz->trips[i].type == THERMAL_TRIP_CRITICAL) { | |
343 | *temp = tz->trips[i].temperature; | |
4e5e4705 EV |
344 | return 0; |
345 | } | |
346 | ||
347 | return -EINVAL; | |
348 | } | |
349 | ||
350 | static struct thermal_zone_device_ops of_thermal_ops = { | |
4e5e4705 EV |
351 | .get_trip_type = of_thermal_get_trip_type, |
352 | .get_trip_temp = of_thermal_get_trip_temp, | |
353 | .set_trip_temp = of_thermal_set_trip_temp, | |
354 | .get_trip_hyst = of_thermal_get_trip_hyst, | |
355 | .set_trip_hyst = of_thermal_set_trip_hyst, | |
356 | .get_crit_temp = of_thermal_get_crit_temp, | |
357 | ||
358 | .bind = of_thermal_bind, | |
359 | .unbind = of_thermal_unbind, | |
360 | }; | |
361 | ||
362 | /*** sensor API ***/ | |
363 | ||
364 | static struct thermal_zone_device * | |
365 | thermal_zone_of_add_sensor(struct device_node *zone, | |
366 | struct device_node *sensor, void *data, | |
2251aef6 | 367 | const struct thermal_zone_of_device_ops *ops) |
4e5e4705 EV |
368 | { |
369 | struct thermal_zone_device *tzd; | |
370 | struct __thermal_zone *tz; | |
371 | ||
372 | tzd = thermal_zone_get_zone_by_name(zone->name); | |
373 | if (IS_ERR(tzd)) | |
374 | return ERR_PTR(-EPROBE_DEFER); | |
375 | ||
376 | tz = tzd->devdata; | |
377 | ||
2251aef6 EV |
378 | if (!ops) |
379 | return ERR_PTR(-EINVAL); | |
380 | ||
4e5e4705 | 381 | mutex_lock(&tzd->lock); |
2251aef6 | 382 | tz->ops = ops; |
4e5e4705 EV |
383 | tz->sensor_data = data; |
384 | ||
385 | tzd->ops->get_temp = of_thermal_get_temp; | |
386 | tzd->ops->get_trend = of_thermal_get_trend; | |
826386e7 SH |
387 | |
388 | /* | |
389 | * The thermal zone core will calculate the window if they have set the | |
390 | * optional set_trips pointer. | |
391 | */ | |
392 | if (ops->set_trips) | |
393 | tzd->ops->set_trips = of_thermal_set_trips; | |
394 | ||
e2fa7488 K |
395 | if (ops->set_emul_temp) |
396 | tzd->ops->set_emul_temp = of_thermal_set_emul_temp; | |
397 | ||
bf70c577 MMP |
398 | if (ops->change_mode) |
399 | tzd->ops->change_mode = of_thermal_change_mode; | |
400 | ||
4e5e4705 EV |
401 | mutex_unlock(&tzd->lock); |
402 | ||
403 | return tzd; | |
404 | } | |
405 | ||
34471abf AH |
406 | /** |
407 | * thermal_zone_of_get_sensor_id - get sensor ID from a DT thermal zone | |
408 | * @tz_np: a valid thermal zone device node. | |
409 | * @sensor_np: a sensor node of a valid sensor device. | |
410 | * @id: the sensor ID returned if success. | |
411 | * | |
412 | * This function will get sensor ID from a given thermal zone node and | |
413 | * the sensor node must match the temperature provider @sensor_np. | |
414 | * | |
415 | * Return: 0 on success, proper error code otherwise. | |
416 | */ | |
417 | ||
418 | int thermal_zone_of_get_sensor_id(struct device_node *tz_np, | |
419 | struct device_node *sensor_np, | |
420 | u32 *id) | |
421 | { | |
422 | struct of_phandle_args sensor_specs; | |
423 | int ret; | |
424 | ||
425 | ret = of_parse_phandle_with_args(tz_np, | |
426 | "thermal-sensors", | |
427 | "#thermal-sensor-cells", | |
428 | 0, | |
429 | &sensor_specs); | |
430 | if (ret) | |
431 | return ret; | |
432 | ||
433 | if (sensor_specs.np != sensor_np) { | |
434 | of_node_put(sensor_specs.np); | |
435 | return -ENODEV; | |
436 | } | |
437 | ||
438 | if (sensor_specs.args_count > 1) | |
439 | pr_warn("%pOFn: too many cells in sensor specifier %d\n", | |
440 | sensor_specs.np, sensor_specs.args_count); | |
441 | ||
442 | *id = sensor_specs.args_count ? sensor_specs.args[0] : 0; | |
443 | ||
444 | of_node_put(sensor_specs.np); | |
445 | ||
446 | return 0; | |
447 | } | |
448 | EXPORT_SYMBOL_GPL(thermal_zone_of_get_sensor_id); | |
449 | ||
4e5e4705 EV |
450 | /** |
451 | * thermal_zone_of_sensor_register - registers a sensor to a DT thermal zone | |
452 | * @dev: a valid struct device pointer of a sensor device. Must contain | |
453 | * a valid .of_node, for the sensor node. | |
454 | * @sensor_id: a sensor identifier, in case the sensor IP has more | |
455 | * than one sensors | |
456 | * @data: a private pointer (owned by the caller) that will be passed | |
457 | * back, when a temperature reading is needed. | |
2251aef6 | 458 | * @ops: struct thermal_zone_of_device_ops *. Must contain at least .get_temp. |
4e5e4705 EV |
459 | * |
460 | * This function will search the list of thermal zones described in device | |
461 | * tree and look for the zone that refer to the sensor device pointed by | |
462 | * @dev->of_node as temperature providers. For the zone pointing to the | |
463 | * sensor node, the sensor will be added to the DT thermal zone device. | |
464 | * | |
465 | * The thermal zone temperature is provided by the @get_temp function | |
466 | * pointer. When called, it will have the private pointer @data back. | |
467 | * | |
468 | * The thermal zone temperature trend is provided by the @get_trend function | |
469 | * pointer. When called, it will have the private pointer @data back. | |
470 | * | |
471 | * TODO: | |
472 | * 01 - This function must enqueue the new sensor instead of using | |
473 | * it as the only source of temperature values. | |
474 | * | |
475 | * 02 - There must be a way to match the sensor with all thermal zones | |
476 | * that refer to it. | |
477 | * | |
478 | * Return: On success returns a valid struct thermal_zone_device, | |
479 | * otherwise, it returns a corresponding ERR_PTR(). Caller must | |
480 | * check the return value with help of IS_ERR() helper. | |
481 | */ | |
482 | struct thermal_zone_device * | |
2251aef6 EV |
483 | thermal_zone_of_sensor_register(struct device *dev, int sensor_id, void *data, |
484 | const struct thermal_zone_of_device_ops *ops) | |
4e5e4705 EV |
485 | { |
486 | struct device_node *np, *child, *sensor_np; | |
c2aad93c | 487 | struct thermal_zone_device *tzd = ERR_PTR(-ENODEV); |
4e5e4705 EV |
488 | |
489 | np = of_find_node_by_name(NULL, "thermal-zones"); | |
490 | if (!np) | |
491 | return ERR_PTR(-ENODEV); | |
492 | ||
c2aad93c VZ |
493 | if (!dev || !dev->of_node) { |
494 | of_node_put(np); | |
370f995d | 495 | return ERR_PTR(-ENODEV); |
c2aad93c | 496 | } |
4e5e4705 | 497 | |
c2aad93c | 498 | sensor_np = of_node_get(dev->of_node); |
4e5e4705 | 499 | |
42bbe400 | 500 | for_each_available_child_of_node(np, child) { |
4e5e4705 EV |
501 | int ret, id; |
502 | ||
503 | /* For now, thermal framework supports only 1 sensor per zone */ | |
34471abf | 504 | ret = thermal_zone_of_get_sensor_id(child, sensor_np, &id); |
4e5e4705 EV |
505 | if (ret) |
506 | continue; | |
507 | ||
34471abf | 508 | if (id == sensor_id) { |
c2aad93c | 509 | tzd = thermal_zone_of_add_sensor(child, sensor_np, |
2251aef6 | 510 | data, ops); |
528012c1 | 511 | if (!IS_ERR(tzd)) |
7f4957be | 512 | thermal_zone_device_enable(tzd); |
528012c1 | 513 | |
c2aad93c VZ |
514 | of_node_put(child); |
515 | goto exit; | |
4e5e4705 EV |
516 | } |
517 | } | |
c2aad93c VZ |
518 | exit: |
519 | of_node_put(sensor_np); | |
4e5e4705 EV |
520 | of_node_put(np); |
521 | ||
c2aad93c | 522 | return tzd; |
4e5e4705 EV |
523 | } |
524 | EXPORT_SYMBOL_GPL(thermal_zone_of_sensor_register); | |
525 | ||
526 | /** | |
527 | * thermal_zone_of_sensor_unregister - unregisters a sensor from a DT thermal zone | |
528 | * @dev: a valid struct device pointer of a sensor device. Must contain | |
529 | * a valid .of_node, for the sensor node. | |
530 | * @tzd: a pointer to struct thermal_zone_device where the sensor is registered. | |
531 | * | |
532 | * This function removes the sensor callbacks and private data from the | |
533 | * thermal zone device registered with thermal_zone_of_sensor_register() | |
534 | * API. It will also silent the zone by remove the .get_temp() and .get_trend() | |
535 | * thermal zone device callbacks. | |
536 | * | |
537 | * TODO: When the support to several sensors per zone is added, this | |
538 | * function must search the sensor list based on @dev parameter. | |
539 | * | |
540 | */ | |
541 | void thermal_zone_of_sensor_unregister(struct device *dev, | |
542 | struct thermal_zone_device *tzd) | |
543 | { | |
544 | struct __thermal_zone *tz; | |
545 | ||
546 | if (!dev || !tzd || !tzd->devdata) | |
547 | return; | |
548 | ||
549 | tz = tzd->devdata; | |
550 | ||
551 | /* no __thermal_zone, nothing to be done */ | |
552 | if (!tz) | |
553 | return; | |
554 | ||
5e5c9f9a DO |
555 | /* stop temperature polling */ |
556 | thermal_zone_device_disable(tzd); | |
557 | ||
4e5e4705 EV |
558 | mutex_lock(&tzd->lock); |
559 | tzd->ops->get_temp = NULL; | |
560 | tzd->ops->get_trend = NULL; | |
184a4bf6 | 561 | tzd->ops->set_emul_temp = NULL; |
bf70c577 | 562 | tzd->ops->change_mode = NULL; |
4e5e4705 | 563 | |
2251aef6 | 564 | tz->ops = NULL; |
4e5e4705 EV |
565 | tz->sensor_data = NULL; |
566 | mutex_unlock(&tzd->lock); | |
567 | } | |
568 | EXPORT_SYMBOL_GPL(thermal_zone_of_sensor_unregister); | |
569 | ||
e498b498 LD |
570 | static void devm_thermal_zone_of_sensor_release(struct device *dev, void *res) |
571 | { | |
572 | thermal_zone_of_sensor_unregister(dev, | |
573 | *(struct thermal_zone_device **)res); | |
574 | } | |
575 | ||
576 | static int devm_thermal_zone_of_sensor_match(struct device *dev, void *res, | |
577 | void *data) | |
578 | { | |
579 | struct thermal_zone_device **r = res; | |
580 | ||
581 | if (WARN_ON(!r || !*r)) | |
582 | return 0; | |
583 | ||
584 | return *r == data; | |
585 | } | |
586 | ||
587 | /** | |
588 | * devm_thermal_zone_of_sensor_register - Resource managed version of | |
589 | * thermal_zone_of_sensor_register() | |
590 | * @dev: a valid struct device pointer of a sensor device. Must contain | |
591 | * a valid .of_node, for the sensor node. | |
592 | * @sensor_id: a sensor identifier, in case the sensor IP has more | |
593 | * than one sensors | |
594 | * @data: a private pointer (owned by the caller) that will be passed | |
595 | * back, when a temperature reading is needed. | |
596 | * @ops: struct thermal_zone_of_device_ops *. Must contain at least .get_temp. | |
597 | * | |
598 | * Refer thermal_zone_of_sensor_register() for more details. | |
599 | * | |
600 | * Return: On success returns a valid struct thermal_zone_device, | |
601 | * otherwise, it returns a corresponding ERR_PTR(). Caller must | |
602 | * check the return value with help of IS_ERR() helper. | |
7b5c4a0c | 603 | * Registered thermal_zone_device device will automatically be |
e498b498 LD |
604 | * released when device is unbounded. |
605 | */ | |
606 | struct thermal_zone_device *devm_thermal_zone_of_sensor_register( | |
607 | struct device *dev, int sensor_id, | |
608 | void *data, const struct thermal_zone_of_device_ops *ops) | |
609 | { | |
610 | struct thermal_zone_device **ptr, *tzd; | |
611 | ||
612 | ptr = devres_alloc(devm_thermal_zone_of_sensor_release, sizeof(*ptr), | |
613 | GFP_KERNEL); | |
614 | if (!ptr) | |
615 | return ERR_PTR(-ENOMEM); | |
616 | ||
617 | tzd = thermal_zone_of_sensor_register(dev, sensor_id, data, ops); | |
618 | if (IS_ERR(tzd)) { | |
619 | devres_free(ptr); | |
620 | return tzd; | |
621 | } | |
622 | ||
623 | *ptr = tzd; | |
624 | devres_add(dev, ptr); | |
625 | ||
626 | return tzd; | |
627 | } | |
628 | EXPORT_SYMBOL_GPL(devm_thermal_zone_of_sensor_register); | |
629 | ||
630 | /** | |
631 | * devm_thermal_zone_of_sensor_unregister - Resource managed version of | |
632 | * thermal_zone_of_sensor_unregister(). | |
633 | * @dev: Device for which which resource was allocated. | |
634 | * @tzd: a pointer to struct thermal_zone_device where the sensor is registered. | |
635 | * | |
636 | * This function removes the sensor callbacks and private data from the | |
637 | * thermal zone device registered with devm_thermal_zone_of_sensor_register() | |
638 | * API. It will also silent the zone by remove the .get_temp() and .get_trend() | |
639 | * thermal zone device callbacks. | |
640 | * Normally this function will not need to be called and the resource | |
641 | * management code will ensure that the resource is freed. | |
642 | */ | |
643 | void devm_thermal_zone_of_sensor_unregister(struct device *dev, | |
644 | struct thermal_zone_device *tzd) | |
645 | { | |
646 | WARN_ON(devres_release(dev, devm_thermal_zone_of_sensor_release, | |
647 | devm_thermal_zone_of_sensor_match, tzd)); | |
648 | } | |
649 | EXPORT_SYMBOL_GPL(devm_thermal_zone_of_sensor_unregister); | |
650 | ||
4e5e4705 EV |
651 | /*** functions parsing device tree nodes ***/ |
652 | ||
a3193edc DL |
653 | static int of_find_trip_id(struct device_node *np, struct device_node *trip) |
654 | { | |
655 | struct device_node *trips; | |
656 | struct device_node *t; | |
657 | int i = 0; | |
658 | ||
659 | trips = of_get_child_by_name(np, "trips"); | |
660 | if (!trips) { | |
661 | pr_err("Failed to find 'trips' node\n"); | |
662 | return -EINVAL; | |
663 | } | |
664 | ||
665 | /* | |
666 | * Find the trip id point associated with the cooling device map | |
667 | */ | |
668 | for_each_child_of_node(trips, t) { | |
669 | ||
670 | if (t == trip) | |
671 | goto out; | |
672 | i++; | |
673 | } | |
674 | ||
675 | i = -ENXIO; | |
676 | out: | |
677 | of_node_put(trips); | |
678 | ||
679 | return i; | |
680 | } | |
681 | ||
4e5e4705 EV |
682 | /** |
683 | * thermal_of_populate_bind_params - parse and fill cooling map data | |
684 | * @np: DT node containing a cooling-map node | |
685 | * @__tbp: data structure to be filled with cooling map info | |
686 | * @trips: array of thermal zone trip points | |
687 | * @ntrips: number of trip points inside trips. | |
688 | * | |
689 | * This function parses a cooling-map type of node represented by | |
690 | * @np parameter and fills the read data into @__tbp data structure. | |
691 | * It needs the already parsed array of trip points of the thermal zone | |
692 | * in consideration. | |
693 | * | |
694 | * Return: 0 on success, proper error code otherwise | |
695 | */ | |
d0c75fa2 DL |
696 | static int thermal_of_populate_bind_params(struct device_node *tz_np, |
697 | struct device_node *np, | |
a3193edc | 698 | struct __thermal_bind_params *__tbp) |
4e5e4705 EV |
699 | { |
700 | struct of_phandle_args cooling_spec; | |
a92bab89 | 701 | struct __thermal_cooling_bind_param *__tcbp; |
4e5e4705 | 702 | struct device_node *trip; |
a92bab89 | 703 | int ret, i, count; |
a3193edc | 704 | int trip_id; |
4e5e4705 EV |
705 | u32 prop; |
706 | ||
707 | /* Default weight. Usage is optional */ | |
6cd9e9f6 | 708 | __tbp->usage = THERMAL_WEIGHT_DEFAULT; |
4e5e4705 EV |
709 | ret = of_property_read_u32(np, "contribution", &prop); |
710 | if (ret == 0) | |
711 | __tbp->usage = prop; | |
712 | ||
713 | trip = of_parse_phandle(np, "trip", 0); | |
714 | if (!trip) { | |
715 | pr_err("missing trip property\n"); | |
716 | return -ENODEV; | |
717 | } | |
718 | ||
d0c75fa2 | 719 | trip_id = of_find_trip_id(tz_np, trip); |
a3193edc DL |
720 | if (trip_id < 0) { |
721 | ret = trip_id; | |
4e5e4705 EV |
722 | goto end; |
723 | } | |
724 | ||
a3193edc DL |
725 | __tbp->trip_id = trip_id; |
726 | ||
a92bab89 VK |
727 | count = of_count_phandle_with_args(np, "cooling-device", |
728 | "#cooling-cells"); | |
45c7eaeb | 729 | if (count <= 0) { |
a92bab89 | 730 | pr_err("Add a cooling_device property with at least one device\n"); |
45c7eaeb | 731 | ret = -ENOENT; |
4e5e4705 EV |
732 | goto end; |
733 | } | |
a92bab89 VK |
734 | |
735 | __tcbp = kcalloc(count, sizeof(*__tcbp), GFP_KERNEL); | |
45c7eaeb JJB |
736 | if (!__tcbp) { |
737 | ret = -ENOMEM; | |
a92bab89 | 738 | goto end; |
45c7eaeb | 739 | } |
a92bab89 VK |
740 | |
741 | for (i = 0; i < count; i++) { | |
742 | ret = of_parse_phandle_with_args(np, "cooling-device", | |
743 | "#cooling-cells", i, &cooling_spec); | |
744 | if (ret < 0) { | |
745 | pr_err("Invalid cooling-device entry\n"); | |
746 | goto free_tcbp; | |
747 | } | |
748 | ||
749 | __tcbp[i].cooling_device = cooling_spec.np; | |
750 | ||
751 | if (cooling_spec.args_count >= 2) { /* at least min and max */ | |
752 | __tcbp[i].min = cooling_spec.args[0]; | |
753 | __tcbp[i].max = cooling_spec.args[1]; | |
754 | } else { | |
755 | pr_err("wrong reference to cooling device, missing limits\n"); | |
756 | } | |
4e5e4705 EV |
757 | } |
758 | ||
a92bab89 VK |
759 | __tbp->tcbp = __tcbp; |
760 | __tbp->count = count; | |
761 | ||
762 | goto end; | |
763 | ||
764 | free_tcbp: | |
765 | for (i = i - 1; i >= 0; i--) | |
766 | of_node_put(__tcbp[i].cooling_device); | |
767 | kfree(__tcbp); | |
4e5e4705 EV |
768 | end: |
769 | of_node_put(trip); | |
770 | ||
771 | return ret; | |
772 | } | |
773 | ||
faae0ed7 | 774 | /* |
4e5e4705 EV |
775 | * It maps 'enum thermal_trip_type' found in include/linux/thermal.h |
776 | * into the device tree binding of 'trip', property type. | |
777 | */ | |
778 | static const char * const trip_types[] = { | |
779 | [THERMAL_TRIP_ACTIVE] = "active", | |
780 | [THERMAL_TRIP_PASSIVE] = "passive", | |
781 | [THERMAL_TRIP_HOT] = "hot", | |
782 | [THERMAL_TRIP_CRITICAL] = "critical", | |
783 | }; | |
784 | ||
785 | /** | |
786 | * thermal_of_get_trip_type - Get phy mode for given device_node | |
787 | * @np: Pointer to the given device_node | |
788 | * @type: Pointer to resulting trip type | |
789 | * | |
790 | * The function gets trip type string from property 'type', | |
791 | * and store its index in trip_types table in @type, | |
792 | * | |
793 | * Return: 0 on success, or errno in error case. | |
794 | */ | |
795 | static int thermal_of_get_trip_type(struct device_node *np, | |
796 | enum thermal_trip_type *type) | |
797 | { | |
798 | const char *t; | |
799 | int err, i; | |
800 | ||
801 | err = of_property_read_string(np, "type", &t); | |
802 | if (err < 0) | |
803 | return err; | |
804 | ||
805 | for (i = 0; i < ARRAY_SIZE(trip_types); i++) | |
806 | if (!strcasecmp(t, trip_types[i])) { | |
807 | *type = i; | |
808 | return 0; | |
809 | } | |
810 | ||
811 | return -ENODEV; | |
812 | } | |
813 | ||
814 | /** | |
815 | * thermal_of_populate_trip - parse and fill one trip point data | |
816 | * @np: DT node containing a trip point node | |
817 | * @trip: trip point data structure to be filled up | |
818 | * | |
819 | * This function parses a trip point type of node represented by | |
820 | * @np parameter and fills the read data into @trip data structure. | |
821 | * | |
822 | * Return: 0 on success, proper error code otherwise | |
823 | */ | |
824 | static int thermal_of_populate_trip(struct device_node *np, | |
ad9914ac | 825 | struct thermal_trip *trip) |
4e5e4705 EV |
826 | { |
827 | int prop; | |
828 | int ret; | |
829 | ||
830 | ret = of_property_read_u32(np, "temperature", &prop); | |
831 | if (ret < 0) { | |
832 | pr_err("missing temperature property\n"); | |
833 | return ret; | |
834 | } | |
835 | trip->temperature = prop; | |
836 | ||
837 | ret = of_property_read_u32(np, "hysteresis", &prop); | |
838 | if (ret < 0) { | |
839 | pr_err("missing hysteresis property\n"); | |
840 | return ret; | |
841 | } | |
842 | trip->hysteresis = prop; | |
843 | ||
844 | ret = thermal_of_get_trip_type(np, &trip->type); | |
845 | if (ret < 0) { | |
846 | pr_err("wrong trip type property\n"); | |
847 | return ret; | |
848 | } | |
849 | ||
4e5e4705 EV |
850 | return 0; |
851 | } | |
852 | ||
d0c75fa2 DL |
853 | static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *ntrips) |
854 | { | |
855 | struct thermal_trip *tt; | |
856 | struct device_node *trips, *trip; | |
857 | int ret, count; | |
858 | ||
859 | trips = of_get_child_by_name(np, "trips"); | |
860 | if (!trips) { | |
861 | pr_err("Failed to find 'trips' node\n"); | |
862 | return ERR_PTR(-EINVAL); | |
863 | } | |
864 | ||
865 | count = of_get_child_count(trips); | |
866 | if (!count) { | |
867 | pr_err("No trip point defined\n"); | |
868 | ret = -EINVAL; | |
869 | goto out_of_node_put; | |
870 | } | |
871 | ||
872 | tt = kzalloc(sizeof(*tt) * count, GFP_KERNEL); | |
873 | if (!tt) { | |
874 | ret = -ENOMEM; | |
875 | goto out_of_node_put; | |
876 | } | |
877 | ||
878 | *ntrips = count; | |
879 | ||
880 | count = 0; | |
881 | for_each_child_of_node(trips, trip) { | |
882 | ret = thermal_of_populate_trip(trip, &tt[count++]); | |
883 | if (ret) | |
884 | goto out_kfree; | |
885 | } | |
886 | ||
887 | of_node_put(trips); | |
888 | ||
889 | return tt; | |
890 | ||
891 | out_kfree: | |
892 | kfree(tt); | |
893 | *ntrips = 0; | |
894 | out_of_node_put: | |
895 | of_node_put(trips); | |
896 | ||
897 | return ERR_PTR(ret); | |
898 | } | |
899 | ||
4e5e4705 EV |
900 | /** |
901 | * thermal_of_build_thermal_zone - parse and fill one thermal zone data | |
902 | * @np: DT node containing a thermal zone node | |
903 | * | |
904 | * This function parses a thermal zone type of node represented by | |
905 | * @np parameter and fills the read data into a __thermal_zone data structure | |
906 | * and return this pointer. | |
907 | * | |
a46dbae8 | 908 | * TODO: Missing properties to parse: thermal-sensor-names |
4e5e4705 EV |
909 | * |
910 | * Return: On success returns a valid struct __thermal_zone, | |
911 | * otherwise, it returns a corresponding ERR_PTR(). Caller must | |
912 | * check the return value with help of IS_ERR() helper. | |
913 | */ | |
c0ff8aaa JL |
914 | static struct __thermal_zone |
915 | __init *thermal_of_build_thermal_zone(struct device_node *np) | |
4e5e4705 EV |
916 | { |
917 | struct device_node *child = NULL, *gchild; | |
918 | struct __thermal_zone *tz; | |
919 | int ret, i; | |
a46dbae8 | 920 | u32 prop, coef[2]; |
4e5e4705 EV |
921 | |
922 | if (!np) { | |
923 | pr_err("no thermal zone np\n"); | |
924 | return ERR_PTR(-EINVAL); | |
925 | } | |
926 | ||
927 | tz = kzalloc(sizeof(*tz), GFP_KERNEL); | |
928 | if (!tz) | |
929 | return ERR_PTR(-ENOMEM); | |
930 | ||
931 | ret = of_property_read_u32(np, "polling-delay-passive", &prop); | |
932 | if (ret < 0) { | |
3079f340 | 933 | pr_err("%pOFn: missing polling-delay-passive property\n", np); |
4e5e4705 EV |
934 | goto free_tz; |
935 | } | |
936 | tz->passive_delay = prop; | |
937 | ||
938 | ret = of_property_read_u32(np, "polling-delay", &prop); | |
939 | if (ret < 0) { | |
3079f340 | 940 | pr_err("%pOFn: missing polling-delay property\n", np); |
4e5e4705 EV |
941 | goto free_tz; |
942 | } | |
943 | tz->polling_delay = prop; | |
944 | ||
a46dbae8 EV |
945 | /* |
946 | * REVIST: for now, the thermal framework supports only | |
947 | * one sensor per thermal zone. Thus, we are considering | |
948 | * only the first two values as slope and offset. | |
949 | */ | |
950 | ret = of_property_read_u32_array(np, "coefficients", coef, 2); | |
951 | if (ret == 0) { | |
952 | tz->slope = coef[0]; | |
953 | tz->offset = coef[1]; | |
954 | } else { | |
955 | tz->slope = 1; | |
956 | tz->offset = 0; | |
957 | } | |
958 | ||
d0c75fa2 DL |
959 | tz->trips = thermal_of_trips_init(np, &tz->ntrips); |
960 | if (IS_ERR(tz->trips)) { | |
961 | ret = PTR_ERR(tz->trips); | |
4e5e4705 | 962 | goto finish; |
4e5e4705 EV |
963 | } |
964 | ||
4e5e4705 EV |
965 | /* cooling-maps */ |
966 | child = of_get_child_by_name(np, "cooling-maps"); | |
967 | ||
968 | /* cooling-maps not provided */ | |
969 | if (!child) | |
970 | goto finish; | |
971 | ||
972 | tz->num_tbps = of_get_child_count(child); | |
973 | if (tz->num_tbps == 0) | |
974 | goto finish; | |
975 | ||
6396bb22 | 976 | tz->tbps = kcalloc(tz->num_tbps, sizeof(*tz->tbps), GFP_KERNEL); |
4e5e4705 EV |
977 | if (!tz->tbps) { |
978 | ret = -ENOMEM; | |
979 | goto free_trips; | |
980 | } | |
981 | ||
982 | i = 0; | |
ca9521b7 | 983 | for_each_child_of_node(child, gchild) { |
d0c75fa2 DL |
984 | ret = thermal_of_populate_bind_params(np, gchild, &tz->tbps[i++]); |
985 | if (ret) { | |
986 | of_node_put(gchild); | |
4e5e4705 | 987 | goto free_tbps; |
d0c75fa2 | 988 | } |
ca9521b7 | 989 | } |
4e5e4705 EV |
990 | |
991 | finish: | |
992 | of_node_put(child); | |
4e5e4705 EV |
993 | |
994 | return tz; | |
995 | ||
996 | free_tbps: | |
a92bab89 VK |
997 | for (i = i - 1; i >= 0; i--) { |
998 | struct __thermal_bind_params *tbp = tz->tbps + i; | |
999 | int j; | |
1000 | ||
1001 | for (j = 0; j < tbp->count; j++) | |
1002 | of_node_put(tbp->tcbp[j].cooling_device); | |
1003 | ||
1004 | kfree(tbp->tcbp); | |
1005 | } | |
1006 | ||
4e5e4705 EV |
1007 | kfree(tz->tbps); |
1008 | free_trips: | |
1009 | kfree(tz->trips); | |
1010 | free_tz: | |
1011 | kfree(tz); | |
1012 | of_node_put(child); | |
1013 | ||
1014 | return ERR_PTR(ret); | |
1015 | } | |
1016 | ||
93802b03 | 1017 | static __init void of_thermal_free_zone(struct __thermal_zone *tz) |
4e5e4705 | 1018 | { |
a92bab89 VK |
1019 | struct __thermal_bind_params *tbp; |
1020 | int i, j; | |
1021 | ||
1022 | for (i = 0; i < tz->num_tbps; i++) { | |
1023 | tbp = tz->tbps + i; | |
1024 | ||
1025 | for (j = 0; j < tbp->count; j++) | |
1026 | of_node_put(tbp->tcbp[j].cooling_device); | |
1027 | ||
1028 | kfree(tbp->tcbp); | |
1029 | } | |
c2aad93c | 1030 | |
4e5e4705 EV |
1031 | kfree(tz->tbps); |
1032 | kfree(tz->trips); | |
1033 | kfree(tz); | |
1034 | } | |
1035 | ||
8c24b85d DL |
1036 | /** |
1037 | * of_thermal_destroy_zones - remove all zones parsed and allocated resources | |
1038 | * | |
1039 | * Finds all zones parsed and added to the thermal framework and remove them | |
1040 | * from the system, together with their resources. | |
1041 | * | |
1042 | */ | |
1043 | static __init void of_thermal_destroy_zones(void) | |
1044 | { | |
1045 | struct device_node *np, *child; | |
1046 | ||
1047 | np = of_find_node_by_name(NULL, "thermal-zones"); | |
1048 | if (!np) { | |
1049 | pr_debug("unable to find thermal zones\n"); | |
1050 | return; | |
1051 | } | |
1052 | ||
1053 | for_each_available_child_of_node(np, child) { | |
1054 | struct thermal_zone_device *zone; | |
1055 | ||
1056 | zone = thermal_zone_get_zone_by_name(child->name); | |
1057 | if (IS_ERR(zone)) | |
1058 | continue; | |
1059 | ||
1060 | thermal_zone_device_unregister(zone); | |
1061 | kfree(zone->tzp); | |
1062 | kfree(zone->ops); | |
1063 | of_thermal_free_zone(zone->devdata); | |
1064 | } | |
1065 | of_node_put(np); | |
1066 | } | |
1067 | ||
4e5e4705 EV |
1068 | /** |
1069 | * of_parse_thermal_zones - parse device tree thermal data | |
1070 | * | |
1071 | * Initialization function that can be called by machine initialization | |
1072 | * code to parse thermal data and populate the thermal framework | |
1073 | * with hardware thermal zones info. This function only parses thermal zones. | |
1074 | * Cooling devices and sensor devices nodes are supposed to be parsed | |
1075 | * by their respective drivers. | |
1076 | * | |
1077 | * Return: 0 on success, proper error code otherwise | |
1078 | * | |
1079 | */ | |
1080 | int __init of_parse_thermal_zones(void) | |
1081 | { | |
1082 | struct device_node *np, *child; | |
1083 | struct __thermal_zone *tz; | |
1084 | struct thermal_zone_device_ops *ops; | |
1085 | ||
1086 | np = of_find_node_by_name(NULL, "thermal-zones"); | |
1087 | if (!np) { | |
1088 | pr_debug("unable to find thermal zones\n"); | |
1089 | return 0; /* Run successfully on systems without thermal DT */ | |
1090 | } | |
1091 | ||
42bbe400 | 1092 | for_each_available_child_of_node(np, child) { |
4e5e4705 EV |
1093 | struct thermal_zone_device *zone; |
1094 | struct thermal_zone_params *tzp; | |
76af5495 | 1095 | int i, mask = 0; |
647f9925 | 1096 | u32 prop; |
4e5e4705 EV |
1097 | |
1098 | tz = thermal_of_build_thermal_zone(child); | |
1099 | if (IS_ERR(tz)) { | |
9b965660 RH |
1100 | pr_err("failed to build thermal zone %pOFn: %ld\n", |
1101 | child, | |
4e5e4705 EV |
1102 | PTR_ERR(tz)); |
1103 | continue; | |
1104 | } | |
1105 | ||
1106 | ops = kmemdup(&of_thermal_ops, sizeof(*ops), GFP_KERNEL); | |
1107 | if (!ops) | |
1108 | goto exit_free; | |
1109 | ||
1110 | tzp = kzalloc(sizeof(*tzp), GFP_KERNEL); | |
1111 | if (!tzp) { | |
1112 | kfree(ops); | |
1113 | goto exit_free; | |
1114 | } | |
1115 | ||
1116 | /* No hwmon because there might be hwmon drivers registering */ | |
1117 | tzp->no_hwmon = true; | |
1118 | ||
647f9925 PA |
1119 | if (!of_property_read_u32(child, "sustainable-power", &prop)) |
1120 | tzp->sustainable_power = prop; | |
1121 | ||
76af5495 PA |
1122 | for (i = 0; i < tz->ntrips; i++) |
1123 | mask |= 1 << i; | |
1124 | ||
a46dbae8 EV |
1125 | /* these two are left for temperature drivers to use */ |
1126 | tzp->slope = tz->slope; | |
1127 | tzp->offset = tz->offset; | |
1128 | ||
fae11de5 DL |
1129 | zone = thermal_zone_device_register_with_trips(child->name, tz->trips, tz->ntrips, |
1130 | mask, tz, ops, tzp, tz->passive_delay, | |
1131 | tz->polling_delay); | |
4e5e4705 | 1132 | if (IS_ERR(zone)) { |
9b965660 | 1133 | pr_err("Failed to build %pOFn zone %ld\n", child, |
4e5e4705 EV |
1134 | PTR_ERR(zone)); |
1135 | kfree(tzp); | |
1136 | kfree(ops); | |
1137 | of_thermal_free_zone(tz); | |
1138 | /* attempting to build remaining zones still */ | |
1139 | } | |
1140 | } | |
c2aad93c | 1141 | of_node_put(np); |
4e5e4705 EV |
1142 | |
1143 | return 0; | |
1144 | ||
1145 | exit_free: | |
c2aad93c VZ |
1146 | of_node_put(child); |
1147 | of_node_put(np); | |
4e5e4705 EV |
1148 | of_thermal_free_zone(tz); |
1149 | ||
1150 | /* no memory available, so free what we have built */ | |
1151 | of_thermal_destroy_zones(); | |
1152 | ||
1153 | return -ENOMEM; | |
1154 | } |