1
2
3
4
5#include <linux/clk.h>
6#include <linux/cpufreq.h>
7#include <linux/cpu_cooling.h>
8#include <linux/delay.h>
9#include <linux/interrupt.h>
10#include <linux/io.h>
11#include <linux/mfd/syscon.h>
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/of_device.h>
15#include <linux/regmap.h>
16#include <linux/thermal.h>
17#include <linux/nvmem-consumer.h>
18
19#define REG_SET 0x4
20#define REG_CLR 0x8
21#define REG_TOG 0xc
22
23
24#define IMX6_MISC0 0x0150
25#define IMX6_MISC0_REFTOP_SELBIASOFF (1 << 3)
26#define IMX6_MISC1 0x0160
27#define IMX6_MISC1_IRQ_TEMPHIGH (1 << 29)
28
29#define IMX6_MISC1_IRQ_TEMPLOW (1 << 28)
30#define IMX6_MISC1_IRQ_TEMPPANIC (1 << 27)
31
32#define IMX6_TEMPSENSE0 0x0180
33#define IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT 20
34#define IMX6_TEMPSENSE0_ALARM_VALUE_MASK (0xfff << 20)
35#define IMX6_TEMPSENSE0_TEMP_CNT_SHIFT 8
36#define IMX6_TEMPSENSE0_TEMP_CNT_MASK (0xfff << 8)
37#define IMX6_TEMPSENSE0_FINISHED (1 << 2)
38#define IMX6_TEMPSENSE0_MEASURE_TEMP (1 << 1)
39#define IMX6_TEMPSENSE0_POWER_DOWN (1 << 0)
40
41#define IMX6_TEMPSENSE1 0x0190
42#define IMX6_TEMPSENSE1_MEASURE_FREQ 0xffff
43#define IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT 0
44
45#define OCOTP_MEM0 0x0480
46#define OCOTP_ANA1 0x04e0
47
48
49#define IMX6_TEMPSENSE2 0x0290
50#define IMX6_TEMPSENSE2_LOW_VALUE_SHIFT 0
51#define IMX6_TEMPSENSE2_LOW_VALUE_MASK 0xfff
52#define IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT 16
53#define IMX6_TEMPSENSE2_PANIC_VALUE_MASK 0xfff0000
54
55
56#define IMX7_ANADIG_DIGPROG 0x800
57#define IMX7_TEMPSENSE0 0x300
58#define IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT 18
59#define IMX7_TEMPSENSE0_PANIC_ALARM_MASK (0x1ff << 18)
60#define IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT 9
61#define IMX7_TEMPSENSE0_HIGH_ALARM_MASK (0x1ff << 9)
62#define IMX7_TEMPSENSE0_LOW_ALARM_SHIFT 0
63#define IMX7_TEMPSENSE0_LOW_ALARM_MASK 0x1ff
64
65#define IMX7_TEMPSENSE1 0x310
66#define IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT 16
67#define IMX7_TEMPSENSE1_MEASURE_FREQ_MASK (0xffff << 16)
68#define IMX7_TEMPSENSE1_FINISHED (1 << 11)
69#define IMX7_TEMPSENSE1_MEASURE_TEMP (1 << 10)
70#define IMX7_TEMPSENSE1_POWER_DOWN (1 << 9)
71#define IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT 0
72#define IMX7_TEMPSENSE1_TEMP_VALUE_MASK 0x1ff
73
74
75enum imx_thermal_trip {
76 IMX_TRIP_PASSIVE,
77 IMX_TRIP_CRITICAL,
78 IMX_TRIP_NUM,
79};
80
81#define IMX_POLLING_DELAY 2000
82#define IMX_PASSIVE_DELAY 1000
83
84#define TEMPMON_IMX6Q 1
85#define TEMPMON_IMX6SX 2
86#define TEMPMON_IMX7D 3
87
88struct thermal_soc_data {
89 u32 version;
90
91 u32 sensor_ctrl;
92 u32 power_down_mask;
93 u32 measure_temp_mask;
94
95 u32 measure_freq_ctrl;
96 u32 measure_freq_mask;
97 u32 measure_freq_shift;
98
99 u32 temp_data;
100 u32 temp_value_mask;
101 u32 temp_value_shift;
102 u32 temp_valid_mask;
103
104 u32 panic_alarm_ctrl;
105 u32 panic_alarm_mask;
106 u32 panic_alarm_shift;
107
108 u32 high_alarm_ctrl;
109 u32 high_alarm_mask;
110 u32 high_alarm_shift;
111
112 u32 low_alarm_ctrl;
113 u32 low_alarm_mask;
114 u32 low_alarm_shift;
115};
116
117static struct thermal_soc_data thermal_imx6q_data = {
118 .version = TEMPMON_IMX6Q,
119
120 .sensor_ctrl = IMX6_TEMPSENSE0,
121 .power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN,
122 .measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP,
123
124 .measure_freq_ctrl = IMX6_TEMPSENSE1,
125 .measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT,
126 .measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ,
127
128 .temp_data = IMX6_TEMPSENSE0,
129 .temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK,
130 .temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT,
131 .temp_valid_mask = IMX6_TEMPSENSE0_FINISHED,
132
133 .high_alarm_ctrl = IMX6_TEMPSENSE0,
134 .high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK,
135 .high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT,
136};
137
138static struct thermal_soc_data thermal_imx6sx_data = {
139 .version = TEMPMON_IMX6SX,
140
141 .sensor_ctrl = IMX6_TEMPSENSE0,
142 .power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN,
143 .measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP,
144
145 .measure_freq_ctrl = IMX6_TEMPSENSE1,
146 .measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT,
147 .measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ,
148
149 .temp_data = IMX6_TEMPSENSE0,
150 .temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK,
151 .temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT,
152 .temp_valid_mask = IMX6_TEMPSENSE0_FINISHED,
153
154 .high_alarm_ctrl = IMX6_TEMPSENSE0,
155 .high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK,
156 .high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT,
157
158 .panic_alarm_ctrl = IMX6_TEMPSENSE2,
159 .panic_alarm_mask = IMX6_TEMPSENSE2_PANIC_VALUE_MASK,
160 .panic_alarm_shift = IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT,
161
162 .low_alarm_ctrl = IMX6_TEMPSENSE2,
163 .low_alarm_mask = IMX6_TEMPSENSE2_LOW_VALUE_MASK,
164 .low_alarm_shift = IMX6_TEMPSENSE2_LOW_VALUE_SHIFT,
165};
166
167static struct thermal_soc_data thermal_imx7d_data = {
168 .version = TEMPMON_IMX7D,
169
170 .sensor_ctrl = IMX7_TEMPSENSE1,
171 .power_down_mask = IMX7_TEMPSENSE1_POWER_DOWN,
172 .measure_temp_mask = IMX7_TEMPSENSE1_MEASURE_TEMP,
173
174 .measure_freq_ctrl = IMX7_TEMPSENSE1,
175 .measure_freq_shift = IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT,
176 .measure_freq_mask = IMX7_TEMPSENSE1_MEASURE_FREQ_MASK,
177
178 .temp_data = IMX7_TEMPSENSE1,
179 .temp_value_mask = IMX7_TEMPSENSE1_TEMP_VALUE_MASK,
180 .temp_value_shift = IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT,
181 .temp_valid_mask = IMX7_TEMPSENSE1_FINISHED,
182
183 .panic_alarm_ctrl = IMX7_TEMPSENSE1,
184 .panic_alarm_mask = IMX7_TEMPSENSE0_PANIC_ALARM_MASK,
185 .panic_alarm_shift = IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT,
186
187 .high_alarm_ctrl = IMX7_TEMPSENSE0,
188 .high_alarm_mask = IMX7_TEMPSENSE0_HIGH_ALARM_MASK,
189 .high_alarm_shift = IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT,
190
191 .low_alarm_ctrl = IMX7_TEMPSENSE0,
192 .low_alarm_mask = IMX7_TEMPSENSE0_LOW_ALARM_MASK,
193 .low_alarm_shift = IMX7_TEMPSENSE0_LOW_ALARM_SHIFT,
194};
195
196struct imx_thermal_data {
197 struct cpufreq_policy *policy;
198 struct thermal_zone_device *tz;
199 struct thermal_cooling_device *cdev;
200 enum thermal_device_mode mode;
201 struct regmap *tempmon;
202 u32 c1, c2;
203 int temp_passive;
204 int temp_critical;
205 int temp_max;
206 int alarm_temp;
207 int last_temp;
208 bool irq_enabled;
209 int irq;
210 struct clk *thermal_clk;
211 const struct thermal_soc_data *socdata;
212 const char *temp_grade;
213};
214
215static void imx_set_panic_temp(struct imx_thermal_data *data,
216 int panic_temp)
217{
218 const struct thermal_soc_data *soc_data = data->socdata;
219 struct regmap *map = data->tempmon;
220 int critical_value;
221
222 critical_value = (data->c2 - panic_temp) / data->c1;
223
224 regmap_write(map, soc_data->panic_alarm_ctrl + REG_CLR,
225 soc_data->panic_alarm_mask);
226 regmap_write(map, soc_data->panic_alarm_ctrl + REG_SET,
227 critical_value << soc_data->panic_alarm_shift);
228}
229
230static void imx_set_alarm_temp(struct imx_thermal_data *data,
231 int alarm_temp)
232{
233 struct regmap *map = data->tempmon;
234 const struct thermal_soc_data *soc_data = data->socdata;
235 int alarm_value;
236
237 data->alarm_temp = alarm_temp;
238
239 if (data->socdata->version == TEMPMON_IMX7D)
240 alarm_value = alarm_temp / 1000 + data->c1 - 25;
241 else
242 alarm_value = (data->c2 - alarm_temp) / data->c1;
243
244 regmap_write(map, soc_data->high_alarm_ctrl + REG_CLR,
245 soc_data->high_alarm_mask);
246 regmap_write(map, soc_data->high_alarm_ctrl + REG_SET,
247 alarm_value << soc_data->high_alarm_shift);
248}
249
250static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
251{
252 struct imx_thermal_data *data = tz->devdata;
253 const struct thermal_soc_data *soc_data = data->socdata;
254 struct regmap *map = data->tempmon;
255 unsigned int n_meas;
256 bool wait;
257 u32 val;
258
259 if (data->mode == THERMAL_DEVICE_ENABLED) {
260
261 regmap_read(map, soc_data->temp_data, &val);
262 wait = !(val & soc_data->temp_valid_mask);
263 } else {
264
265
266
267
268
269 regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
270 soc_data->power_down_mask);
271 regmap_write(map, soc_data->sensor_ctrl + REG_SET,
272 soc_data->measure_temp_mask);
273
274 wait = true;
275 }
276
277
278
279
280
281 if (wait)
282 usleep_range(20, 50);
283
284 regmap_read(map, soc_data->temp_data, &val);
285
286 if (data->mode != THERMAL_DEVICE_ENABLED) {
287 regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
288 soc_data->measure_temp_mask);
289 regmap_write(map, soc_data->sensor_ctrl + REG_SET,
290 soc_data->power_down_mask);
291 }
292
293 if ((val & soc_data->temp_valid_mask) == 0) {
294 dev_dbg(&tz->device, "temp measurement never finished\n");
295 return -EAGAIN;
296 }
297
298 n_meas = (val & soc_data->temp_value_mask)
299 >> soc_data->temp_value_shift;
300
301
302 if (data->socdata->version == TEMPMON_IMX7D)
303 *temp = (n_meas - data->c1 + 25) * 1000;
304 else
305 *temp = data->c2 - n_meas * data->c1;
306
307
308 if (data->socdata->version == TEMPMON_IMX6Q) {
309 if (data->alarm_temp == data->temp_passive &&
310 *temp >= data->temp_passive)
311 imx_set_alarm_temp(data, data->temp_critical);
312 if (data->alarm_temp == data->temp_critical &&
313 *temp < data->temp_passive) {
314 imx_set_alarm_temp(data, data->temp_passive);
315 dev_dbg(&tz->device, "thermal alarm off: T < %d\n",
316 data->alarm_temp / 1000);
317 }
318 }
319
320 if (*temp != data->last_temp) {
321 dev_dbg(&tz->device, "millicelsius: %d\n", *temp);
322 data->last_temp = *temp;
323 }
324
325
326 if (!data->irq_enabled && *temp < data->alarm_temp) {
327 data->irq_enabled = true;
328 enable_irq(data->irq);
329 }
330
331 return 0;
332}
333
334static int imx_get_mode(struct thermal_zone_device *tz,
335 enum thermal_device_mode *mode)
336{
337 struct imx_thermal_data *data = tz->devdata;
338
339 *mode = data->mode;
340
341 return 0;
342}
343
344static int imx_set_mode(struct thermal_zone_device *tz,
345 enum thermal_device_mode mode)
346{
347 struct imx_thermal_data *data = tz->devdata;
348 struct regmap *map = data->tempmon;
349 const struct thermal_soc_data *soc_data = data->socdata;
350
351 if (mode == THERMAL_DEVICE_ENABLED) {
352 tz->polling_delay = IMX_POLLING_DELAY;
353 tz->passive_delay = IMX_PASSIVE_DELAY;
354
355 regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
356 soc_data->power_down_mask);
357 regmap_write(map, soc_data->sensor_ctrl + REG_SET,
358 soc_data->measure_temp_mask);
359
360 if (!data->irq_enabled) {
361 data->irq_enabled = true;
362 enable_irq(data->irq);
363 }
364 } else {
365 regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
366 soc_data->measure_temp_mask);
367 regmap_write(map, soc_data->sensor_ctrl + REG_SET,
368 soc_data->power_down_mask);
369
370 tz->polling_delay = 0;
371 tz->passive_delay = 0;
372
373 if (data->irq_enabled) {
374 disable_irq(data->irq);
375 data->irq_enabled = false;
376 }
377 }
378
379 data->mode = mode;
380 thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
381
382 return 0;
383}
384
385static int imx_get_trip_type(struct thermal_zone_device *tz, int trip,
386 enum thermal_trip_type *type)
387{
388 *type = (trip == IMX_TRIP_PASSIVE) ? THERMAL_TRIP_PASSIVE :
389 THERMAL_TRIP_CRITICAL;
390 return 0;
391}
392
393static int imx_get_crit_temp(struct thermal_zone_device *tz, int *temp)
394{
395 struct imx_thermal_data *data = tz->devdata;
396
397 *temp = data->temp_critical;
398 return 0;
399}
400
401static int imx_get_trip_temp(struct thermal_zone_device *tz, int trip,
402 int *temp)
403{
404 struct imx_thermal_data *data = tz->devdata;
405
406 *temp = (trip == IMX_TRIP_PASSIVE) ? data->temp_passive :
407 data->temp_critical;
408 return 0;
409}
410
411static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip,
412 int temp)
413{
414 struct imx_thermal_data *data = tz->devdata;
415
416
417 if (trip == IMX_TRIP_CRITICAL)
418 return -EPERM;
419
420
421 if (temp < 0 || temp > data->temp_critical)
422 return -EINVAL;
423
424 data->temp_passive = temp;
425
426 imx_set_alarm_temp(data, temp);
427
428 return 0;
429}
430
431static int imx_bind(struct thermal_zone_device *tz,
432 struct thermal_cooling_device *cdev)
433{
434 int ret;
435
436 ret = thermal_zone_bind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev,
437 THERMAL_NO_LIMIT,
438 THERMAL_NO_LIMIT,
439 THERMAL_WEIGHT_DEFAULT);
440 if (ret) {
441 dev_err(&tz->device,
442 "binding zone %s with cdev %s failed:%d\n",
443 tz->type, cdev->type, ret);
444 return ret;
445 }
446
447 return 0;
448}
449
450static int imx_unbind(struct thermal_zone_device *tz,
451 struct thermal_cooling_device *cdev)
452{
453 int ret;
454
455 ret = thermal_zone_unbind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev);
456 if (ret) {
457 dev_err(&tz->device,
458 "unbinding zone %s with cdev %s failed:%d\n",
459 tz->type, cdev->type, ret);
460 return ret;
461 }
462
463 return 0;
464}
465
466static struct thermal_zone_device_ops imx_tz_ops = {
467 .bind = imx_bind,
468 .unbind = imx_unbind,
469 .get_temp = imx_get_temp,
470 .get_mode = imx_get_mode,
471 .set_mode = imx_set_mode,
472 .get_trip_type = imx_get_trip_type,
473 .get_trip_temp = imx_get_trip_temp,
474 .get_crit_temp = imx_get_crit_temp,
475 .set_trip_temp = imx_set_trip_temp,
476};
477
478static int imx_init_calib(struct platform_device *pdev, u32 ocotp_ana1)
479{
480 struct imx_thermal_data *data = platform_get_drvdata(pdev);
481 int n1;
482 u64 temp64;
483
484 if (ocotp_ana1 == 0 || ocotp_ana1 == ~0) {
485 dev_err(&pdev->dev, "invalid sensor calibration data\n");
486 return -EINVAL;
487 }
488
489
490
491
492
493 if (data->socdata->version == TEMPMON_IMX7D) {
494 data->c1 = (ocotp_ana1 >> 9) & 0x1ff;
495 return 0;
496 }
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517 n1 = ocotp_ana1 >> 20;
518
519 temp64 = 10000000;
520 temp64 *= 1000;
521 do_div(temp64, 15423 * n1 - 4148468);
522 data->c1 = temp64;
523 data->c2 = n1 * data->c1 + 28581;
524
525 return 0;
526}
527
528static void imx_init_temp_grade(struct platform_device *pdev, u32 ocotp_mem0)
529{
530 struct imx_thermal_data *data = platform_get_drvdata(pdev);
531
532
533 switch ((ocotp_mem0 >> 6) & 0x3) {
534 case 0:
535 data->temp_grade = "Commercial";
536 data->temp_max = 95000;
537 break;
538 case 1:
539 data->temp_grade = "Extended Commercial";
540 data->temp_max = 105000;
541 break;
542 case 2:
543 data->temp_grade = "Industrial";
544 data->temp_max = 105000;
545 break;
546 case 3:
547 data->temp_grade = "Automotive";
548 data->temp_max = 125000;
549 break;
550 }
551
552
553
554
555
556 data->temp_critical = data->temp_max - (1000 * 5);
557 data->temp_passive = data->temp_max - (1000 * 10);
558}
559
560static int imx_init_from_tempmon_data(struct platform_device *pdev)
561{
562 struct regmap *map;
563 int ret;
564 u32 val;
565
566 map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
567 "fsl,tempmon-data");
568 if (IS_ERR(map)) {
569 ret = PTR_ERR(map);
570 dev_err(&pdev->dev, "failed to get sensor regmap: %d\n", ret);
571 return ret;
572 }
573
574 ret = regmap_read(map, OCOTP_ANA1, &val);
575 if (ret) {
576 dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
577 return ret;
578 }
579 ret = imx_init_calib(pdev, val);
580 if (ret)
581 return ret;
582
583 ret = regmap_read(map, OCOTP_MEM0, &val);
584 if (ret) {
585 dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
586 return ret;
587 }
588 imx_init_temp_grade(pdev, val);
589
590 return 0;
591}
592
593static int imx_init_from_nvmem_cells(struct platform_device *pdev)
594{
595 int ret;
596 u32 val;
597
598 ret = nvmem_cell_read_u32(&pdev->dev, "calib", &val);
599 if (ret)
600 return ret;
601
602 ret = imx_init_calib(pdev, val);
603 if (ret)
604 return ret;
605
606 ret = nvmem_cell_read_u32(&pdev->dev, "temp_grade", &val);
607 if (ret)
608 return ret;
609 imx_init_temp_grade(pdev, val);
610
611 return 0;
612}
613
614static irqreturn_t imx_thermal_alarm_irq(int irq, void *dev)
615{
616 struct imx_thermal_data *data = dev;
617
618 disable_irq_nosync(irq);
619 data->irq_enabled = false;
620
621 return IRQ_WAKE_THREAD;
622}
623
624static irqreturn_t imx_thermal_alarm_irq_thread(int irq, void *dev)
625{
626 struct imx_thermal_data *data = dev;
627
628 dev_dbg(&data->tz->device, "THERMAL ALARM: T > %d\n",
629 data->alarm_temp / 1000);
630
631 thermal_zone_device_update(data->tz, THERMAL_EVENT_UNSPECIFIED);
632
633 return IRQ_HANDLED;
634}
635
636static const struct of_device_id of_imx_thermal_match[] = {
637 { .compatible = "fsl,imx6q-tempmon", .data = &thermal_imx6q_data, },
638 { .compatible = "fsl,imx6sx-tempmon", .data = &thermal_imx6sx_data, },
639 { .compatible = "fsl,imx7d-tempmon", .data = &thermal_imx7d_data, },
640 { }
641};
642MODULE_DEVICE_TABLE(of, of_imx_thermal_match);
643
644#ifdef CONFIG_CPU_FREQ
645
646
647
648
649static int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data)
650{
651 struct device_node *np;
652 int ret = 0;
653
654 data->policy = cpufreq_cpu_get(0);
655 if (!data->policy) {
656 pr_debug("%s: CPUFreq policy not found\n", __func__);
657 return -EPROBE_DEFER;
658 }
659
660 np = of_get_cpu_node(data->policy->cpu, NULL);
661
662 if (!np || !of_find_property(np, "#cooling-cells", NULL)) {
663 data->cdev = cpufreq_cooling_register(data->policy);
664 if (IS_ERR(data->cdev)) {
665 ret = PTR_ERR(data->cdev);
666 cpufreq_cpu_put(data->policy);
667 }
668 }
669
670 of_node_put(np);
671
672 return ret;
673}
674
675static void imx_thermal_unregister_legacy_cooling(struct imx_thermal_data *data)
676{
677 cpufreq_cooling_unregister(data->cdev);
678 cpufreq_cpu_put(data->policy);
679}
680
681#else
682
683static inline int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data)
684{
685 return 0;
686}
687
688static inline void imx_thermal_unregister_legacy_cooling(struct imx_thermal_data *data)
689{
690}
691#endif
692
693static int imx_thermal_probe(struct platform_device *pdev)
694{
695 struct imx_thermal_data *data;
696 struct regmap *map;
697 int measure_freq;
698 int ret;
699
700 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
701 if (!data)
702 return -ENOMEM;
703
704 map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "fsl,tempmon");
705 if (IS_ERR(map)) {
706 ret = PTR_ERR(map);
707 dev_err(&pdev->dev, "failed to get tempmon regmap: %d\n", ret);
708 return ret;
709 }
710 data->tempmon = map;
711
712 data->socdata = of_device_get_match_data(&pdev->dev);
713 if (!data->socdata) {
714 dev_err(&pdev->dev, "no device match found\n");
715 return -ENODEV;
716 }
717
718
719 if (data->socdata->version == TEMPMON_IMX6SX) {
720 regmap_write(map, IMX6_MISC1 + REG_CLR,
721 IMX6_MISC1_IRQ_TEMPHIGH | IMX6_MISC1_IRQ_TEMPLOW
722 | IMX6_MISC1_IRQ_TEMPPANIC);
723
724
725
726
727 regmap_write(map, data->socdata->low_alarm_ctrl + REG_SET,
728 data->socdata->low_alarm_mask);
729 }
730
731 data->irq = platform_get_irq(pdev, 0);
732 if (data->irq < 0)
733 return data->irq;
734
735 platform_set_drvdata(pdev, data);
736
737 if (of_find_property(pdev->dev.of_node, "nvmem-cells", NULL)) {
738 ret = imx_init_from_nvmem_cells(pdev);
739 if (ret) {
740 if (ret == -EPROBE_DEFER)
741 return ret;
742
743 dev_err(&pdev->dev, "failed to init from nvmem: %d\n",
744 ret);
745 return ret;
746 }
747 } else {
748 ret = imx_init_from_tempmon_data(pdev);
749 if (ret) {
750 dev_err(&pdev->dev, "failed to init from fsl,tempmon-data\n");
751 return ret;
752 }
753 }
754
755
756 regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
757 data->socdata->power_down_mask);
758 regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
759 data->socdata->measure_temp_mask);
760 regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR,
761 data->socdata->measure_freq_mask);
762 if (data->socdata->version != TEMPMON_IMX7D)
763 regmap_write(map, IMX6_MISC0 + REG_SET,
764 IMX6_MISC0_REFTOP_SELBIASOFF);
765 regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
766 data->socdata->power_down_mask);
767
768 ret = imx_thermal_register_legacy_cooling(data);
769 if (ret) {
770 if (ret == -EPROBE_DEFER)
771 return ret;
772
773 dev_err(&pdev->dev,
774 "failed to register cpufreq cooling device: %d\n", ret);
775 return ret;
776 }
777
778 data->thermal_clk = devm_clk_get(&pdev->dev, NULL);
779 if (IS_ERR(data->thermal_clk)) {
780 ret = PTR_ERR(data->thermal_clk);
781 if (ret != -EPROBE_DEFER)
782 dev_err(&pdev->dev,
783 "failed to get thermal clk: %d\n", ret);
784 goto legacy_cleanup;
785 }
786
787
788
789
790
791
792
793
794 ret = clk_prepare_enable(data->thermal_clk);
795 if (ret) {
796 dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret);
797 goto legacy_cleanup;
798 }
799
800 data->tz = thermal_zone_device_register("imx_thermal_zone",
801 IMX_TRIP_NUM,
802 BIT(IMX_TRIP_PASSIVE), data,
803 &imx_tz_ops, NULL,
804 IMX_PASSIVE_DELAY,
805 IMX_POLLING_DELAY);
806 if (IS_ERR(data->tz)) {
807 ret = PTR_ERR(data->tz);
808 dev_err(&pdev->dev,
809 "failed to register thermal zone device %d\n", ret);
810 goto clk_disable;
811 }
812
813 dev_info(&pdev->dev, "%s CPU temperature grade - max:%dC"
814 " critical:%dC passive:%dC\n", data->temp_grade,
815 data->temp_max / 1000, data->temp_critical / 1000,
816 data->temp_passive / 1000);
817
818
819 regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR,
820 data->socdata->measure_freq_mask);
821 measure_freq = DIV_ROUND_UP(32768, 10);
822 regmap_write(map, data->socdata->measure_freq_ctrl + REG_SET,
823 measure_freq << data->socdata->measure_freq_shift);
824 imx_set_alarm_temp(data, data->temp_passive);
825
826 if (data->socdata->version == TEMPMON_IMX6SX)
827 imx_set_panic_temp(data, data->temp_critical);
828
829 regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
830 data->socdata->power_down_mask);
831 regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
832 data->socdata->measure_temp_mask);
833
834 data->irq_enabled = true;
835 data->mode = THERMAL_DEVICE_ENABLED;
836
837 ret = devm_request_threaded_irq(&pdev->dev, data->irq,
838 imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread,
839 0, "imx_thermal", data);
840 if (ret < 0) {
841 dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret);
842 goto thermal_zone_unregister;
843 }
844
845 return 0;
846
847thermal_zone_unregister:
848 thermal_zone_device_unregister(data->tz);
849clk_disable:
850 clk_disable_unprepare(data->thermal_clk);
851legacy_cleanup:
852 imx_thermal_unregister_legacy_cooling(data);
853
854 return ret;
855}
856
857static int imx_thermal_remove(struct platform_device *pdev)
858{
859 struct imx_thermal_data *data = platform_get_drvdata(pdev);
860 struct regmap *map = data->tempmon;
861
862
863 regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
864 data->socdata->power_down_mask);
865 if (!IS_ERR(data->thermal_clk))
866 clk_disable_unprepare(data->thermal_clk);
867
868 thermal_zone_device_unregister(data->tz);
869 imx_thermal_unregister_legacy_cooling(data);
870
871 return 0;
872}
873
874static int __maybe_unused imx_thermal_suspend(struct device *dev)
875{
876 struct imx_thermal_data *data = dev_get_drvdata(dev);
877 struct regmap *map = data->tempmon;
878
879
880
881
882
883
884
885 regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
886 data->socdata->measure_temp_mask);
887 regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
888 data->socdata->power_down_mask);
889 data->mode = THERMAL_DEVICE_DISABLED;
890 clk_disable_unprepare(data->thermal_clk);
891
892 return 0;
893}
894
895static int __maybe_unused imx_thermal_resume(struct device *dev)
896{
897 struct imx_thermal_data *data = dev_get_drvdata(dev);
898 struct regmap *map = data->tempmon;
899 int ret;
900
901 ret = clk_prepare_enable(data->thermal_clk);
902 if (ret)
903 return ret;
904
905 regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
906 data->socdata->power_down_mask);
907 regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
908 data->socdata->measure_temp_mask);
909 data->mode = THERMAL_DEVICE_ENABLED;
910
911 return 0;
912}
913
914static SIMPLE_DEV_PM_OPS(imx_thermal_pm_ops,
915 imx_thermal_suspend, imx_thermal_resume);
916
917static struct platform_driver imx_thermal = {
918 .driver = {
919 .name = "imx_thermal",
920 .pm = &imx_thermal_pm_ops,
921 .of_match_table = of_imx_thermal_match,
922 },
923 .probe = imx_thermal_probe,
924 .remove = imx_thermal_remove,
925};
926module_platform_driver(imx_thermal);
927
928MODULE_AUTHOR("Freescale Semiconductor, Inc.");
929MODULE_DESCRIPTION("Thermal driver for Freescale i.MX SoCs");
930MODULE_LICENSE("GPL v2");
931MODULE_ALIAS("platform:imx-thermal");
932