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ca3de46b SG |
1 | /* |
2 | * Copyright 2013 Freescale Semiconductor, Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | */ | |
9 | ||
10 | #include <linux/cpu_cooling.h> | |
11 | #include <linux/cpufreq.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/device.h> | |
14 | #include <linux/init.h> | |
37713a1e | 15 | #include <linux/interrupt.h> |
ca3de46b SG |
16 | #include <linux/io.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mfd/syscon.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/of.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/regmap.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/thermal.h> | |
25 | #include <linux/types.h> | |
26 | ||
27 | #define REG_SET 0x4 | |
28 | #define REG_CLR 0x8 | |
29 | #define REG_TOG 0xc | |
30 | ||
31 | #define MISC0 0x0150 | |
32 | #define MISC0_REFTOP_SELBIASOFF (1 << 3) | |
33 | ||
34 | #define TEMPSENSE0 0x0180 | |
37713a1e PZ |
35 | #define TEMPSENSE0_ALARM_VALUE_SHIFT 20 |
36 | #define TEMPSENSE0_ALARM_VALUE_MASK (0xfff << TEMPSENSE0_ALARM_VALUE_SHIFT) | |
ca3de46b SG |
37 | #define TEMPSENSE0_TEMP_CNT_SHIFT 8 |
38 | #define TEMPSENSE0_TEMP_CNT_MASK (0xfff << TEMPSENSE0_TEMP_CNT_SHIFT) | |
39 | #define TEMPSENSE0_FINISHED (1 << 2) | |
40 | #define TEMPSENSE0_MEASURE_TEMP (1 << 1) | |
41 | #define TEMPSENSE0_POWER_DOWN (1 << 0) | |
42 | ||
43 | #define TEMPSENSE1 0x0190 | |
44 | #define TEMPSENSE1_MEASURE_FREQ 0xffff | |
45 | ||
46 | #define OCOTP_ANA1 0x04e0 | |
47 | ||
48 | /* The driver supports 1 passive trip point and 1 critical trip point */ | |
49 | enum imx_thermal_trip { | |
50 | IMX_TRIP_PASSIVE, | |
51 | IMX_TRIP_CRITICAL, | |
52 | IMX_TRIP_NUM, | |
53 | }; | |
54 | ||
55 | /* | |
56 | * It defines the temperature in millicelsius for passive trip point | |
57 | * that will trigger cooling action when crossed. | |
58 | */ | |
59 | #define IMX_TEMP_PASSIVE 85000 | |
60 | ||
ca3de46b SG |
61 | #define IMX_POLLING_DELAY 2000 /* millisecond */ |
62 | #define IMX_PASSIVE_DELAY 1000 | |
63 | ||
64 | struct imx_thermal_data { | |
65 | struct thermal_zone_device *tz; | |
66 | struct thermal_cooling_device *cdev; | |
67 | enum thermal_device_mode mode; | |
68 | struct regmap *tempmon; | |
69 | int c1, c2; /* See formula in imx_get_sensor_data() */ | |
017e5142 PZ |
70 | unsigned long temp_passive; |
71 | unsigned long temp_critical; | |
37713a1e PZ |
72 | unsigned long alarm_temp; |
73 | unsigned long last_temp; | |
74 | bool irq_enabled; | |
75 | int irq; | |
ca3de46b SG |
76 | }; |
77 | ||
37713a1e PZ |
78 | static void imx_set_alarm_temp(struct imx_thermal_data *data, |
79 | signed long alarm_temp) | |
80 | { | |
81 | struct regmap *map = data->tempmon; | |
82 | int alarm_value; | |
83 | ||
84 | data->alarm_temp = alarm_temp; | |
85 | alarm_value = (alarm_temp - data->c2) / data->c1; | |
86 | regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_ALARM_VALUE_MASK); | |
87 | regmap_write(map, TEMPSENSE0 + REG_SET, alarm_value << | |
88 | TEMPSENSE0_ALARM_VALUE_SHIFT); | |
89 | } | |
90 | ||
ca3de46b SG |
91 | static int imx_get_temp(struct thermal_zone_device *tz, unsigned long *temp) |
92 | { | |
93 | struct imx_thermal_data *data = tz->devdata; | |
94 | struct regmap *map = data->tempmon; | |
ca3de46b | 95 | unsigned int n_meas; |
37713a1e | 96 | bool wait; |
ca3de46b SG |
97 | u32 val; |
98 | ||
37713a1e PZ |
99 | if (data->mode == THERMAL_DEVICE_ENABLED) { |
100 | /* Check if a measurement is currently in progress */ | |
101 | regmap_read(map, TEMPSENSE0, &val); | |
102 | wait = !(val & TEMPSENSE0_FINISHED); | |
103 | } else { | |
104 | /* | |
105 | * Every time we measure the temperature, we will power on the | |
106 | * temperature sensor, enable measurements, take a reading, | |
107 | * disable measurements, power off the temperature sensor. | |
108 | */ | |
109 | regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); | |
110 | regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); | |
111 | ||
112 | wait = true; | |
113 | } | |
ca3de46b SG |
114 | |
115 | /* | |
116 | * According to the temp sensor designers, it may require up to ~17us | |
117 | * to complete a measurement. | |
118 | */ | |
37713a1e PZ |
119 | if (wait) |
120 | usleep_range(20, 50); | |
ca3de46b SG |
121 | |
122 | regmap_read(map, TEMPSENSE0, &val); | |
37713a1e PZ |
123 | |
124 | if (data->mode != THERMAL_DEVICE_ENABLED) { | |
125 | regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); | |
126 | regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); | |
127 | } | |
ca3de46b SG |
128 | |
129 | if ((val & TEMPSENSE0_FINISHED) == 0) { | |
130 | dev_dbg(&tz->device, "temp measurement never finished\n"); | |
131 | return -EAGAIN; | |
132 | } | |
133 | ||
134 | n_meas = (val & TEMPSENSE0_TEMP_CNT_MASK) >> TEMPSENSE0_TEMP_CNT_SHIFT; | |
135 | ||
136 | /* See imx_get_sensor_data() for formula derivation */ | |
137 | *temp = data->c2 + data->c1 * n_meas; | |
138 | ||
37713a1e PZ |
139 | /* Update alarm value to next higher trip point */ |
140 | if (data->alarm_temp == data->temp_passive && *temp >= data->temp_passive) | |
141 | imx_set_alarm_temp(data, data->temp_critical); | |
142 | if (data->alarm_temp == data->temp_critical && *temp < data->temp_passive) { | |
143 | imx_set_alarm_temp(data, data->temp_passive); | |
144 | dev_dbg(&tz->device, "thermal alarm off: T < %lu\n", | |
145 | data->alarm_temp / 1000); | |
146 | } | |
147 | ||
148 | if (*temp != data->last_temp) { | |
ca3de46b | 149 | dev_dbg(&tz->device, "millicelsius: %ld\n", *temp); |
37713a1e PZ |
150 | data->last_temp = *temp; |
151 | } | |
152 | ||
153 | /* Reenable alarm IRQ if temperature below alarm temperature */ | |
154 | if (!data->irq_enabled && *temp < data->alarm_temp) { | |
155 | data->irq_enabled = true; | |
156 | enable_irq(data->irq); | |
ca3de46b SG |
157 | } |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static int imx_get_mode(struct thermal_zone_device *tz, | |
163 | enum thermal_device_mode *mode) | |
164 | { | |
165 | struct imx_thermal_data *data = tz->devdata; | |
166 | ||
167 | *mode = data->mode; | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int imx_set_mode(struct thermal_zone_device *tz, | |
173 | enum thermal_device_mode mode) | |
174 | { | |
175 | struct imx_thermal_data *data = tz->devdata; | |
37713a1e | 176 | struct regmap *map = data->tempmon; |
ca3de46b SG |
177 | |
178 | if (mode == THERMAL_DEVICE_ENABLED) { | |
179 | tz->polling_delay = IMX_POLLING_DELAY; | |
180 | tz->passive_delay = IMX_PASSIVE_DELAY; | |
37713a1e PZ |
181 | |
182 | regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); | |
183 | regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); | |
184 | ||
185 | if (!data->irq_enabled) { | |
186 | data->irq_enabled = true; | |
187 | enable_irq(data->irq); | |
188 | } | |
ca3de46b | 189 | } else { |
37713a1e PZ |
190 | regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); |
191 | regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); | |
192 | ||
ca3de46b SG |
193 | tz->polling_delay = 0; |
194 | tz->passive_delay = 0; | |
37713a1e PZ |
195 | |
196 | if (data->irq_enabled) { | |
197 | disable_irq(data->irq); | |
198 | data->irq_enabled = false; | |
199 | } | |
ca3de46b SG |
200 | } |
201 | ||
202 | data->mode = mode; | |
203 | thermal_zone_device_update(tz); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | static int imx_get_trip_type(struct thermal_zone_device *tz, int trip, | |
209 | enum thermal_trip_type *type) | |
210 | { | |
211 | *type = (trip == IMX_TRIP_PASSIVE) ? THERMAL_TRIP_PASSIVE : | |
212 | THERMAL_TRIP_CRITICAL; | |
213 | return 0; | |
214 | } | |
215 | ||
216 | static int imx_get_crit_temp(struct thermal_zone_device *tz, | |
217 | unsigned long *temp) | |
218 | { | |
017e5142 PZ |
219 | struct imx_thermal_data *data = tz->devdata; |
220 | ||
221 | *temp = data->temp_critical; | |
ca3de46b SG |
222 | return 0; |
223 | } | |
224 | ||
225 | static int imx_get_trip_temp(struct thermal_zone_device *tz, int trip, | |
226 | unsigned long *temp) | |
227 | { | |
017e5142 PZ |
228 | struct imx_thermal_data *data = tz->devdata; |
229 | ||
230 | *temp = (trip == IMX_TRIP_PASSIVE) ? data->temp_passive : | |
231 | data->temp_critical; | |
232 | return 0; | |
233 | } | |
234 | ||
235 | static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip, | |
236 | unsigned long temp) | |
237 | { | |
238 | struct imx_thermal_data *data = tz->devdata; | |
239 | ||
240 | if (trip == IMX_TRIP_CRITICAL) | |
241 | return -EPERM; | |
242 | ||
243 | if (temp > IMX_TEMP_PASSIVE) | |
244 | return -EINVAL; | |
245 | ||
246 | data->temp_passive = temp; | |
247 | ||
37713a1e PZ |
248 | imx_set_alarm_temp(data, temp); |
249 | ||
ca3de46b SG |
250 | return 0; |
251 | } | |
252 | ||
253 | static int imx_bind(struct thermal_zone_device *tz, | |
254 | struct thermal_cooling_device *cdev) | |
255 | { | |
256 | int ret; | |
257 | ||
258 | ret = thermal_zone_bind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev, | |
259 | THERMAL_NO_LIMIT, | |
260 | THERMAL_NO_LIMIT); | |
261 | if (ret) { | |
262 | dev_err(&tz->device, | |
263 | "binding zone %s with cdev %s failed:%d\n", | |
264 | tz->type, cdev->type, ret); | |
265 | return ret; | |
266 | } | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
271 | static int imx_unbind(struct thermal_zone_device *tz, | |
272 | struct thermal_cooling_device *cdev) | |
273 | { | |
274 | int ret; | |
275 | ||
276 | ret = thermal_zone_unbind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev); | |
277 | if (ret) { | |
278 | dev_err(&tz->device, | |
279 | "unbinding zone %s with cdev %s failed:%d\n", | |
280 | tz->type, cdev->type, ret); | |
281 | return ret; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | static const struct thermal_zone_device_ops imx_tz_ops = { | |
288 | .bind = imx_bind, | |
289 | .unbind = imx_unbind, | |
290 | .get_temp = imx_get_temp, | |
291 | .get_mode = imx_get_mode, | |
292 | .set_mode = imx_set_mode, | |
293 | .get_trip_type = imx_get_trip_type, | |
294 | .get_trip_temp = imx_get_trip_temp, | |
295 | .get_crit_temp = imx_get_crit_temp, | |
017e5142 | 296 | .set_trip_temp = imx_set_trip_temp, |
ca3de46b SG |
297 | }; |
298 | ||
299 | static int imx_get_sensor_data(struct platform_device *pdev) | |
300 | { | |
301 | struct imx_thermal_data *data = platform_get_drvdata(pdev); | |
302 | struct regmap *map; | |
303 | int t1, t2, n1, n2; | |
304 | int ret; | |
305 | u32 val; | |
306 | ||
307 | map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, | |
308 | "fsl,tempmon-data"); | |
309 | if (IS_ERR(map)) { | |
310 | ret = PTR_ERR(map); | |
311 | dev_err(&pdev->dev, "failed to get sensor regmap: %d\n", ret); | |
312 | return ret; | |
313 | } | |
314 | ||
315 | ret = regmap_read(map, OCOTP_ANA1, &val); | |
316 | if (ret) { | |
317 | dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret); | |
318 | return ret; | |
319 | } | |
320 | ||
321 | if (val == 0 || val == ~0) { | |
322 | dev_err(&pdev->dev, "invalid sensor calibration data\n"); | |
323 | return -EINVAL; | |
324 | } | |
325 | ||
326 | /* | |
327 | * Sensor data layout: | |
328 | * [31:20] - sensor value @ 25C | |
329 | * [19:8] - sensor value of hot | |
330 | * [7:0] - hot temperature value | |
331 | */ | |
332 | n1 = val >> 20; | |
333 | n2 = (val & 0xfff00) >> 8; | |
334 | t2 = val & 0xff; | |
335 | t1 = 25; /* t1 always 25C */ | |
336 | ||
337 | /* | |
338 | * Derived from linear interpolation, | |
339 | * Tmeas = T2 + (Nmeas - N2) * (T1 - T2) / (N1 - N2) | |
340 | * We want to reduce this down to the minimum computation necessary | |
341 | * for each temperature read. Also, we want Tmeas in millicelsius | |
342 | * and we don't want to lose precision from integer division. So... | |
343 | * milli_Tmeas = 1000 * T2 + 1000 * (Nmeas - N2) * (T1 - T2) / (N1 - N2) | |
344 | * Let constant c1 = 1000 * (T1 - T2) / (N1 - N2) | |
345 | * milli_Tmeas = (1000 * T2) + c1 * (Nmeas - N2) | |
346 | * milli_Tmeas = (1000 * T2) + (c1 * Nmeas) - (c1 * N2) | |
347 | * Let constant c2 = (1000 * T2) - (c1 * N2) | |
348 | * milli_Tmeas = c2 + (c1 * Nmeas) | |
349 | */ | |
350 | data->c1 = 1000 * (t1 - t2) / (n1 - n2); | |
351 | data->c2 = 1000 * t2 - data->c1 * n2; | |
352 | ||
017e5142 PZ |
353 | /* |
354 | * Set the default passive cooling trip point to 20 °C below the | |
355 | * maximum die temperature. Can be changed from userspace. | |
356 | */ | |
357 | data->temp_passive = 1000 * (t2 - 20); | |
358 | ||
359 | /* | |
360 | * The maximum die temperature is t2, let's give 5 °C cushion | |
361 | * for noise and possible temperature rise between measurements. | |
362 | */ | |
363 | data->temp_critical = 1000 * (t2 - 5); | |
364 | ||
ca3de46b SG |
365 | return 0; |
366 | } | |
367 | ||
37713a1e PZ |
368 | static irqreturn_t imx_thermal_alarm_irq(int irq, void *dev) |
369 | { | |
370 | struct imx_thermal_data *data = dev; | |
371 | ||
372 | disable_irq_nosync(irq); | |
373 | data->irq_enabled = false; | |
374 | ||
375 | return IRQ_WAKE_THREAD; | |
376 | } | |
377 | ||
378 | static irqreturn_t imx_thermal_alarm_irq_thread(int irq, void *dev) | |
379 | { | |
380 | struct imx_thermal_data *data = dev; | |
381 | ||
382 | dev_dbg(&data->tz->device, "THERMAL ALARM: T > %lu\n", | |
383 | data->alarm_temp / 1000); | |
384 | ||
385 | thermal_zone_device_update(data->tz); | |
386 | ||
387 | return IRQ_HANDLED; | |
388 | } | |
389 | ||
ca3de46b SG |
390 | static int imx_thermal_probe(struct platform_device *pdev) |
391 | { | |
392 | struct imx_thermal_data *data; | |
393 | struct cpumask clip_cpus; | |
394 | struct regmap *map; | |
37713a1e | 395 | int measure_freq; |
ca3de46b SG |
396 | int ret; |
397 | ||
398 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); | |
399 | if (!data) | |
400 | return -ENOMEM; | |
401 | ||
402 | map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "fsl,tempmon"); | |
403 | if (IS_ERR(map)) { | |
404 | ret = PTR_ERR(map); | |
405 | dev_err(&pdev->dev, "failed to get tempmon regmap: %d\n", ret); | |
406 | return ret; | |
407 | } | |
408 | data->tempmon = map; | |
409 | ||
37713a1e PZ |
410 | data->irq = platform_get_irq(pdev, 0); |
411 | if (data->irq < 0) | |
412 | return data->irq; | |
413 | ||
414 | ret = devm_request_threaded_irq(&pdev->dev, data->irq, | |
415 | imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread, | |
416 | 0, "imx_thermal", data); | |
417 | if (ret < 0) { | |
418 | dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret); | |
419 | return ret; | |
420 | } | |
421 | ||
ca3de46b SG |
422 | platform_set_drvdata(pdev, data); |
423 | ||
424 | ret = imx_get_sensor_data(pdev); | |
425 | if (ret) { | |
426 | dev_err(&pdev->dev, "failed to get sensor data\n"); | |
427 | return ret; | |
428 | } | |
429 | ||
430 | /* Make sure sensor is in known good state for measurements */ | |
431 | regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); | |
432 | regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); | |
433 | regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ); | |
434 | regmap_write(map, MISC0 + REG_SET, MISC0_REFTOP_SELBIASOFF); | |
435 | regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); | |
436 | ||
437 | cpumask_set_cpu(0, &clip_cpus); | |
438 | data->cdev = cpufreq_cooling_register(&clip_cpus); | |
439 | if (IS_ERR(data->cdev)) { | |
440 | ret = PTR_ERR(data->cdev); | |
441 | dev_err(&pdev->dev, | |
442 | "failed to register cpufreq cooling device: %d\n", ret); | |
443 | return ret; | |
444 | } | |
445 | ||
446 | data->tz = thermal_zone_device_register("imx_thermal_zone", | |
017e5142 PZ |
447 | IMX_TRIP_NUM, |
448 | BIT(IMX_TRIP_PASSIVE), data, | |
ca3de46b SG |
449 | &imx_tz_ops, NULL, |
450 | IMX_PASSIVE_DELAY, | |
451 | IMX_POLLING_DELAY); | |
452 | if (IS_ERR(data->tz)) { | |
453 | ret = PTR_ERR(data->tz); | |
454 | dev_err(&pdev->dev, | |
455 | "failed to register thermal zone device %d\n", ret); | |
456 | cpufreq_cooling_unregister(data->cdev); | |
457 | return ret; | |
458 | } | |
459 | ||
37713a1e PZ |
460 | /* Enable measurements at ~ 10 Hz */ |
461 | regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ); | |
462 | measure_freq = DIV_ROUND_UP(32768, 10); /* 10 Hz */ | |
463 | regmap_write(map, TEMPSENSE1 + REG_SET, measure_freq); | |
464 | imx_set_alarm_temp(data, data->temp_passive); | |
465 | regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); | |
466 | regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); | |
467 | ||
468 | data->irq_enabled = true; | |
ca3de46b SG |
469 | data->mode = THERMAL_DEVICE_ENABLED; |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | static int imx_thermal_remove(struct platform_device *pdev) | |
475 | { | |
476 | struct imx_thermal_data *data = platform_get_drvdata(pdev); | |
37713a1e PZ |
477 | struct regmap *map = data->tempmon; |
478 | ||
479 | /* Disable measurements */ | |
480 | regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); | |
ca3de46b SG |
481 | |
482 | thermal_zone_device_unregister(data->tz); | |
483 | cpufreq_cooling_unregister(data->cdev); | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | #ifdef CONFIG_PM_SLEEP | |
489 | static int imx_thermal_suspend(struct device *dev) | |
490 | { | |
491 | struct imx_thermal_data *data = dev_get_drvdata(dev); | |
492 | struct regmap *map = data->tempmon; | |
493 | u32 val; | |
494 | ||
495 | regmap_read(map, TEMPSENSE0, &val); | |
496 | if ((val & TEMPSENSE0_POWER_DOWN) == 0) { | |
497 | /* | |
498 | * If a measurement is taking place, wait for a long enough | |
499 | * time for it to finish, and then check again. If it still | |
500 | * does not finish, something must go wrong. | |
501 | */ | |
502 | udelay(50); | |
503 | regmap_read(map, TEMPSENSE0, &val); | |
504 | if ((val & TEMPSENSE0_POWER_DOWN) == 0) | |
505 | return -ETIMEDOUT; | |
506 | } | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
511 | static int imx_thermal_resume(struct device *dev) | |
512 | { | |
513 | /* Nothing to do for now */ | |
514 | return 0; | |
515 | } | |
516 | #endif | |
517 | ||
518 | static SIMPLE_DEV_PM_OPS(imx_thermal_pm_ops, | |
519 | imx_thermal_suspend, imx_thermal_resume); | |
520 | ||
521 | static const struct of_device_id of_imx_thermal_match[] = { | |
522 | { .compatible = "fsl,imx6q-tempmon", }, | |
523 | { /* end */ } | |
524 | }; | |
525 | ||
526 | static struct platform_driver imx_thermal = { | |
527 | .driver = { | |
528 | .name = "imx_thermal", | |
529 | .owner = THIS_MODULE, | |
530 | .pm = &imx_thermal_pm_ops, | |
531 | .of_match_table = of_imx_thermal_match, | |
532 | }, | |
533 | .probe = imx_thermal_probe, | |
534 | .remove = imx_thermal_remove, | |
535 | }; | |
536 | module_platform_driver(imx_thermal); | |
537 | ||
538 | MODULE_AUTHOR("Freescale Semiconductor, Inc."); | |
539 | MODULE_DESCRIPTION("Thermal driver for Freescale i.MX SoCs"); | |
540 | MODULE_LICENSE("GPL v2"); | |
541 | MODULE_ALIAS("platform:imx-thermal"); |