summaryrefslogtreecommitdiff
path: root/drivers/thermal/hisi_thermal.c
blob: c4111a98f1a79570c9eb98e7d0fcf9dbcbf2ec67 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
/*
 * Hisilicon thermal sensor driver
 *
 * Copyright (c) 2014-2015 Hisilicon Limited.
 * Copyright (c) 2014-2015 Linaro Limited.
 *
 * Xinwei Kong <kong.kongxinwei@hisilicon.com>
 * Leo Yan <leo.yan@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */

#include <linux/cpufreq.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/of_device.h>

#include "thermal_core.h"

#define HI6220_TEMP0_LAG			(0x0)
#define HI6220_TEMP0_TH				(0x4)
#define HI6220_TEMP0_RST_TH			(0x8)
#define HI6220_TEMP0_CFG			(0xC)
#define HI6220_TEMP0_CFG_SS_MSK			(0xF000)
#define HI6220_TEMP0_CFG_HDAK_MSK		(0x30)
#define HI6220_TEMP0_EN				(0x10)
#define HI6220_TEMP0_INT_EN			(0x14)
#define HI6220_TEMP0_INT_CLR			(0x18)
#define HI6220_TEMP0_RST_MSK			(0x1C)
#define HI6220_TEMP0_VALUE			(0x28)

#define HI3660_OFFSET(chan)		((chan) * 0x40)
#define HI3660_TEMP(chan)		(HI3660_OFFSET(chan) + 0x1C)
#define HI3660_TH(chan)			(HI3660_OFFSET(chan) + 0x20)
#define HI3660_LAG(chan)		(HI3660_OFFSET(chan) + 0x28)
#define HI3660_INT_EN(chan)		(HI3660_OFFSET(chan) + 0x2C)
#define HI3660_INT_CLR(chan)		(HI3660_OFFSET(chan) + 0x30)

#define HI6220_TEMP_BASE			(-60000)
#define HI6220_TEMP_RESET			(100000)
#define HI6220_TEMP_STEP			(785)
#define HI6220_TEMP_LAG				(3500)

#define HI3660_TEMP_BASE		(-63780)
#define HI3660_TEMP_STEP		(205)
#define HI3660_TEMP_LAG			(4000)

#define HI6220_CLUSTER0_SENSOR		2
#define HI6220_CLUSTER1_SENSOR		1

#define HI3660_LITTLE_SENSOR		0
#define HI3660_BIG_SENSOR		1
#define HI3660_G3D_SENSOR		2
#define HI3660_MODEM_SENSOR		3

struct hisi_thermal_data;

struct hisi_thermal_sensor {
	struct hisi_thermal_data *data;
	struct thermal_zone_device *tzd;
	const char *irq_name;
	uint32_t id;
	uint32_t thres_temp;
};

struct hisi_thermal_ops {
	int (*get_temp)(struct hisi_thermal_sensor *sensor);
	int (*enable_sensor)(struct hisi_thermal_sensor *sensor);
	int (*disable_sensor)(struct hisi_thermal_sensor *sensor);
	int (*irq_handler)(struct hisi_thermal_sensor *sensor);
	int (*probe)(struct hisi_thermal_data *data);
};

struct hisi_thermal_data {
	const struct hisi_thermal_ops *ops;
	struct hisi_thermal_sensor *sensor;
	struct platform_device *pdev;
	struct clk *clk;
	void __iomem *regs;
	int nr_sensors;
};

/*
 * The temperature computation on the tsensor is as follow:
 *	Unit: millidegree Celsius
 *	Step: 200/255 (0.7843)
 *	Temperature base: -60°C
 *
 * The register is programmed in temperature steps, every step is 785
 * millidegree and begins at -60 000 m°C
 *
 * The temperature from the steps:
 *
 *	Temp = TempBase + (steps x 785)
 *
 * and the steps from the temperature:
 *
 *	steps = (Temp - TempBase) / 785
 *
 */
static inline int hi6220_thermal_step_to_temp(int step)
{
	return HI6220_TEMP_BASE + (step * HI6220_TEMP_STEP);
}

static inline int hi6220_thermal_temp_to_step(int temp)
{
	return DIV_ROUND_UP(temp - HI6220_TEMP_BASE, HI6220_TEMP_STEP);
}

/*
 * for Hi3660,
 *	Step: 189/922 (0.205)
 *	Temperature base: -63.780°C
 *
 * The register is programmed in temperature steps, every step is 205
 * millidegree and begins at -63 780 m°C
 */
static inline int hi3660_thermal_step_to_temp(int step)
{
	return HI3660_TEMP_BASE + step * HI3660_TEMP_STEP;
}

static inline int hi3660_thermal_temp_to_step(int temp)
{
	return DIV_ROUND_UP(temp - HI3660_TEMP_BASE, HI3660_TEMP_STEP);
}

/*
 * The lag register contains 5 bits encoding the temperature in steps.
 *
 * Each time the temperature crosses the threshold boundary, an
 * interrupt is raised. It could be when the temperature is going
 * above the threshold or below. However, if the temperature is
 * fluctuating around this value due to the load, we can receive
 * several interrupts which may not desired.
 *
 * We can setup a temperature representing the delta between the
 * threshold and the current temperature when the temperature is
 * decreasing.
 *
 * For instance: the lag register is 5°C, the threshold is 65°C, when
 * the temperature reaches 65°C an interrupt is raised and when the
 * temperature decrease to 65°C - 5°C another interrupt is raised.
 *
 * A very short lag can lead to an interrupt storm, a long lag
 * increase the latency to react to the temperature changes.  In our
 * case, that is not really a problem as we are polling the
 * temperature.
 *
 * [0:4] : lag register
 *
 * The temperature is coded in steps, cf. HI6220_TEMP_STEP.
 *
 * Min : 0x00 :  0.0 °C
 * Max : 0x1F : 24.3 °C
 *
 * The 'value' parameter is in milliCelsius.
 */
static inline void hi6220_thermal_set_lag(void __iomem *addr, int value)
{
	writel(DIV_ROUND_UP(value, HI6220_TEMP_STEP) & 0x1F,
			addr + HI6220_TEMP0_LAG);
}

static inline void hi6220_thermal_alarm_clear(void __iomem *addr, int value)
{
	writel(value, addr + HI6220_TEMP0_INT_CLR);
}

static inline void hi6220_thermal_alarm_enable(void __iomem *addr, int value)
{
	writel(value, addr + HI6220_TEMP0_INT_EN);
}

static inline void hi6220_thermal_alarm_set(void __iomem *addr, int temp)
{
	writel(hi6220_thermal_temp_to_step(temp) | 0x0FFFFFF00,
	       addr + HI6220_TEMP0_TH);
}

static inline void hi6220_thermal_reset_set(void __iomem *addr, int temp)
{
	writel(hi6220_thermal_temp_to_step(temp), addr + HI6220_TEMP0_RST_TH);
}

static inline void hi6220_thermal_reset_enable(void __iomem *addr, int value)
{
	writel(value, addr + HI6220_TEMP0_RST_MSK);
}

static inline void hi6220_thermal_enable(void __iomem *addr, int value)
{
	writel(value, addr + HI6220_TEMP0_EN);
}

static inline int hi6220_thermal_get_temperature(void __iomem *addr)
{
	return hi6220_thermal_step_to_temp(readl(addr + HI6220_TEMP0_VALUE));
}

/*
 * [0:6] lag register
 *
 * The temperature is coded in steps, cf. HI3660_TEMP_STEP.
 *
 * Min : 0x00 :  0.0 °C
 * Max : 0x7F : 26.0 °C
 *
 */
static inline void hi3660_thermal_set_lag(void __iomem *addr,
					  int id, int value)
{
	writel(DIV_ROUND_UP(value, HI3660_TEMP_STEP) & 0x7F,
			addr + HI3660_LAG(id));
}

static inline void hi3660_thermal_alarm_clear(void __iomem *addr,
					      int id, int value)
{
	writel(value, addr + HI3660_INT_CLR(id));
}

static inline void hi3660_thermal_alarm_enable(void __iomem *addr,
					       int id, int value)
{
	writel(value, addr + HI3660_INT_EN(id));
}

static inline void hi3660_thermal_alarm_set(void __iomem *addr,
					    int id, int value)
{
	writel(value, addr + HI3660_TH(id));
}

static inline int hi3660_thermal_get_temperature(void __iomem *addr, int id)
{
	return hi3660_thermal_step_to_temp(readl(addr + HI3660_TEMP(id)));
}

/*
 * Temperature configuration register - Sensor selection
 *
 * Bits [19:12]
 *
 * 0x0: local sensor (default)
 * 0x1: remote sensor 1 (ACPU cluster 1)
 * 0x2: remote sensor 2 (ACPU cluster 0)
 * 0x3: remote sensor 3 (G3D)
 */
static inline void hi6220_thermal_sensor_select(void __iomem *addr, int sensor)
{
	writel((readl(addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_SS_MSK) |
	       (sensor << 12), addr + HI6220_TEMP0_CFG);
}

/*
 * Temperature configuration register - Hdak conversion polling interval
 *
 * Bits [5:4]
 *
 * 0x0 :   0.768 ms
 * 0x1 :   6.144 ms
 * 0x2 :  49.152 ms
 * 0x3 : 393.216 ms
 */
static inline void hi6220_thermal_hdak_set(void __iomem *addr, int value)
{
	writel((readl(addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_HDAK_MSK) |
	       (value << 4), addr + HI6220_TEMP0_CFG);
}

static int hi6220_thermal_irq_handler(struct hisi_thermal_sensor *sensor)
{
	struct hisi_thermal_data *data = sensor->data;

	hi6220_thermal_alarm_clear(data->regs, 1);
	return 0;
}

static int hi3660_thermal_irq_handler(struct hisi_thermal_sensor *sensor)
{
	struct hisi_thermal_data *data = sensor->data;

	hi3660_thermal_alarm_clear(data->regs, sensor->id, 1);
	return 0;
}

static int hi6220_thermal_get_temp(struct hisi_thermal_sensor *sensor)
{
	struct hisi_thermal_data *data = sensor->data;

	return hi6220_thermal_get_temperature(data->regs);
}

static int hi3660_thermal_get_temp(struct hisi_thermal_sensor *sensor)
{
	struct hisi_thermal_data *data = sensor->data;

	return hi3660_thermal_get_temperature(data->regs, sensor->id);
}

static int hi6220_thermal_disable_sensor(struct hisi_thermal_sensor *sensor)
{
	struct hisi_thermal_data *data = sensor->data;

	/* disable sensor module */
	hi6220_thermal_enable(data->regs, 0);
	hi6220_thermal_alarm_enable(data->regs, 0);
	hi6220_thermal_reset_enable(data->regs, 0);

	clk_disable_unprepare(data->clk);

	return 0;
}

static int hi3660_thermal_disable_sensor(struct hisi_thermal_sensor *sensor)
{
	struct hisi_thermal_data *data = sensor->data;

	/* disable sensor module */
	hi3660_thermal_alarm_enable(data->regs, sensor->id, 0);
	return 0;
}

static int hi6220_thermal_enable_sensor(struct hisi_thermal_sensor *sensor)
{
	struct hisi_thermal_data *data = sensor->data;
	int ret;

	/* enable clock for tsensor */
	ret = clk_prepare_enable(data->clk);
	if (ret)
		return ret;

	/* disable module firstly */
	hi6220_thermal_reset_enable(data->regs, 0);
	hi6220_thermal_enable(data->regs, 0);

	/* select sensor id */
	hi6220_thermal_sensor_select(data->regs, sensor->id);

	/* setting the hdak time */
	hi6220_thermal_hdak_set(data->regs, 0);

	/* setting lag value between current temp and the threshold */
	hi6220_thermal_set_lag(data->regs, HI6220_TEMP_LAG);

	/* enable for interrupt */
	hi6220_thermal_alarm_set(data->regs, sensor->thres_temp);

	hi6220_thermal_reset_set(data->regs, HI6220_TEMP_RESET);

	/* enable module */
	hi6220_thermal_reset_enable(data->regs, 1);
	hi6220_thermal_enable(data->regs, 1);

	hi6220_thermal_alarm_clear(data->regs, 0);
	hi6220_thermal_alarm_enable(data->regs, 1);

	return 0;
}

static int hi3660_thermal_enable_sensor(struct hisi_thermal_sensor *sensor)
{
	unsigned int value;
	struct hisi_thermal_data *data = sensor->data;

	/* disable interrupt */
	hi3660_thermal_alarm_enable(data->regs, sensor->id, 0);

	/* setting lag value between current temp and the threshold */
	hi3660_thermal_set_lag(data->regs, sensor->id, HI3660_TEMP_LAG);

	/* set interrupt threshold */
	value = hi3660_thermal_temp_to_step(sensor->thres_temp);
	hi3660_thermal_alarm_set(data->regs, sensor->id, value);

	/* enable interrupt */
	hi3660_thermal_alarm_clear(data->regs, sensor->id, 1);
	hi3660_thermal_alarm_enable(data->regs, sensor->id, 1);

	return 0;
}

static int hi6220_thermal_probe(struct hisi_thermal_data *data)
{
	struct platform_device *pdev = data->pdev;
	struct device *dev = &pdev->dev;
	int ret;

	data->clk = devm_clk_get(dev, "thermal_clk");
	if (IS_ERR(data->clk)) {
		ret = PTR_ERR(data->clk);
		if (ret != -EPROBE_DEFER)
			dev_err(dev, "failed to get thermal clk: %d\n", ret);
		return ret;
	}

	data->sensor = devm_kzalloc(dev, sizeof(*data->sensor), GFP_KERNEL);
	if (!data->sensor)
		return -ENOMEM;

	data->sensor[0].id = HI6220_CLUSTER0_SENSOR;
	data->sensor[0].irq_name = "tsensor_intr";
	data->sensor[0].data = data;
	data->nr_sensors = 1;

	return 0;
}

static int hi3660_thermal_probe(struct hisi_thermal_data *data)
{
	struct platform_device *pdev = data->pdev;
	struct device *dev = &pdev->dev;

	data->nr_sensors = 2;

	data->sensor = devm_kzalloc(dev, sizeof(*data->sensor) *
				    data->nr_sensors, GFP_KERNEL);
	if (!data->sensor)
		return -ENOMEM;

	data->sensor[0].id = HI3660_BIG_SENSOR;
	data->sensor[0].irq_name = "tsensor_a73";
	data->sensor[0].data = data;

	data->sensor[1].id = HI3660_LITTLE_SENSOR;
	data->sensor[1].irq_name = "tsensor_a53";
	data->sensor[1].data = data;

	return 0;
}

static int hisi_thermal_get_temp(void *__data, int *temp)
{
	struct hisi_thermal_sensor *sensor = __data;
	struct hisi_thermal_data *data = sensor->data;

	*temp = data->ops->get_temp(sensor);

	dev_dbg(&data->pdev->dev, "tzd=%p, id=%d, temp=%d, thres=%d\n",
		sensor->tzd, sensor->id, *temp, sensor->thres_temp);

	return 0;
}

static const struct thermal_zone_of_device_ops hisi_of_thermal_ops = {
	.get_temp = hisi_thermal_get_temp,
};

static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev)
{
	struct hisi_thermal_sensor *sensor = dev;
	struct hisi_thermal_data *data = sensor->data;
	int temp = 0;

	data->ops->irq_handler(sensor);

	hisi_thermal_get_temp(sensor, &temp);

	if (temp >= sensor->thres_temp) {
		dev_crit(&data->pdev->dev,
			 "sensor <%d> THERMAL ALARM: %d > %d\n",
			 sensor->id, temp, sensor->thres_temp);

		thermal_zone_device_update(sensor->tzd,
					   THERMAL_EVENT_UNSPECIFIED);

	} else {
		dev_crit(&data->pdev->dev,
			 "sensor <%d> THERMAL ALARM stopped: %d < %d\n",
			 sensor->id, temp, sensor->thres_temp);
	}

	return IRQ_HANDLED;
}

static int hisi_thermal_register_sensor(struct platform_device *pdev,
					struct hisi_thermal_sensor *sensor)
{
	int ret, i;
	const struct thermal_trip *trip;

	sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev,
							   sensor->id, sensor,
							   &hisi_of_thermal_ops);
	if (IS_ERR(sensor->tzd)) {
		ret = PTR_ERR(sensor->tzd);
		sensor->tzd = NULL;
		dev_err(&pdev->dev, "failed to register sensor id %d: %d\n",
			sensor->id, ret);
		return ret;
	}

	trip = of_thermal_get_trip_points(sensor->tzd);

	for (i = 0; i < of_thermal_get_ntrips(sensor->tzd); i++) {
		if (trip[i].type == THERMAL_TRIP_PASSIVE) {
			sensor->thres_temp = trip[i].temperature;
			break;
		}
	}

	return 0;
}

static const struct hisi_thermal_ops hi6220_ops = {
	.get_temp	= hi6220_thermal_get_temp,
	.enable_sensor	= hi6220_thermal_enable_sensor,
	.disable_sensor	= hi6220_thermal_disable_sensor,
	.irq_handler	= hi6220_thermal_irq_handler,
	.probe		= hi6220_thermal_probe,
};

static const struct hisi_thermal_ops hi3660_ops = {
	.get_temp	= hi3660_thermal_get_temp,
	.enable_sensor	= hi3660_thermal_enable_sensor,
	.disable_sensor	= hi3660_thermal_disable_sensor,
	.irq_handler	= hi3660_thermal_irq_handler,
	.probe		= hi3660_thermal_probe,
};

static const struct of_device_id of_hisi_thermal_match[] = {
	{
		.compatible = "hisilicon,tsensor",
		.data = &hi6220_ops,
	},
	{
		.compatible = "hisilicon,hi3660-tsensor",
		.data = &hi3660_ops,
	},
	{ /* end */ }
};
MODULE_DEVICE_TABLE(of, of_hisi_thermal_match);

static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor,
				       bool on)
{
	struct thermal_zone_device *tzd = sensor->tzd;

	tzd->ops->set_mode(tzd,
		on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
}

static int hisi_thermal_probe(struct platform_device *pdev)
{
	struct hisi_thermal_data *data;
	struct device *dev = &pdev->dev;
	struct resource *res;
	int i, ret;

	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->pdev = pdev;
	platform_set_drvdata(pdev, data);
	data->ops = of_device_get_match_data(dev);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	data->regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(data->regs)) {
		dev_err(dev, "failed to get io address\n");
		return PTR_ERR(data->regs);
	}

	ret = data->ops->probe(data);
	if (ret)
		return ret;

	for (i = 0; i < data->nr_sensors; i++) {
		struct hisi_thermal_sensor *sensor = &data->sensor[i];

		ret = hisi_thermal_register_sensor(pdev, sensor);
		if (ret) {
			dev_err(dev, "failed to register thermal sensor: %d\n",
				ret);
			return ret;
		}

		ret = platform_get_irq_byname(pdev, sensor->irq_name);
		if (ret < 0)
			return ret;

		ret = devm_request_threaded_irq(dev, ret, NULL,
						hisi_thermal_alarm_irq_thread,
						IRQF_ONESHOT, sensor->irq_name,
						sensor);
		if (ret < 0) {
			dev_err(dev, "Failed to request alarm irq: %d\n", ret);
			return ret;
		}

		ret = data->ops->enable_sensor(sensor);
		if (ret) {
			dev_err(dev, "Failed to setup the sensor: %d\n", ret);
			return ret;
		}

		hisi_thermal_toggle_sensor(sensor, true);
	}

	return 0;
}

static int hisi_thermal_remove(struct platform_device *pdev)
{
	struct hisi_thermal_data *data = platform_get_drvdata(pdev);
	int i;

	for (i = 0; i < data->nr_sensors; i++) {
		struct hisi_thermal_sensor *sensor = &data->sensor[i];

		hisi_thermal_toggle_sensor(sensor, false);
		data->ops->disable_sensor(sensor);
	}

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int hisi_thermal_suspend(struct device *dev)
{
	struct hisi_thermal_data *data = dev_get_drvdata(dev);
	int i;

	for (i = 0; i < data->nr_sensors; i++)
		data->ops->disable_sensor(&data->sensor[i]);

	return 0;
}

static int hisi_thermal_resume(struct device *dev)
{
	struct hisi_thermal_data *data = dev_get_drvdata(dev);
	int i, ret = 0;

	for (i = 0; i < data->nr_sensors; i++)
		ret |= data->ops->enable_sensor(&data->sensor[i]);

	return ret;
}
#endif

static SIMPLE_DEV_PM_OPS(hisi_thermal_pm_ops,
			 hisi_thermal_suspend, hisi_thermal_resume);

static struct platform_driver hisi_thermal_driver = {
	.driver = {
		.name		= "hisi_thermal",
		.pm		= &hisi_thermal_pm_ops,
		.of_match_table = of_hisi_thermal_match,
	},
	.probe	= hisi_thermal_probe,
	.remove	= hisi_thermal_remove,
};

module_platform_driver(hisi_thermal_driver);

MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>");
MODULE_DESCRIPTION("Hisilicon thermal driver");
MODULE_LICENSE("GPL v2");