1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * emc1403.c - SMSC Thermal Driver
4 *
5 * Copyright (C) 2008 Intel Corp
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 */
11
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/slab.h>
15 #include <linux/i2c.h>
16 #include <linux/hwmon.h>
17 #include <linux/hwmon-sysfs.h>
18 #include <linux/err.h>
19 #include <linux/sysfs.h>
20 #include <linux/mutex.h>
21 #include <linux/regmap.h>
22 #include <linux/util_macros.h>
23
24 #define THERMAL_PID_REG 0xfd
25 #define THERMAL_SMSC_ID_REG 0xfe
26 #define THERMAL_REVISION_REG 0xff
27
28 enum emc1403_chip { emc1402, emc1403, emc1404, emc1428 };
29
30 struct thermal_data {
31 enum emc1403_chip chip;
32 struct regmap *regmap;
33 struct mutex mutex;
34 };
35
power_state_show(struct device * dev,struct device_attribute * attr,char * buf)36 static ssize_t power_state_show(struct device *dev, struct device_attribute *attr, char *buf)
37 {
38 struct thermal_data *data = dev_get_drvdata(dev);
39 unsigned int val;
40 int retval;
41
42 retval = regmap_read(data->regmap, 0x03, &val);
43 if (retval < 0)
44 return retval;
45 return sprintf(buf, "%d\n", !!(val & BIT(6)));
46 }
47
power_state_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)48 static ssize_t power_state_store(struct device *dev, struct device_attribute *attr,
49 const char *buf, size_t count)
50 {
51 struct thermal_data *data = dev_get_drvdata(dev);
52 unsigned long val;
53 int retval;
54
55 if (kstrtoul(buf, 10, &val))
56 return -EINVAL;
57
58 retval = regmap_update_bits(data->regmap, 0x03, BIT(6),
59 val ? BIT(6) : 0);
60 if (retval < 0)
61 return retval;
62 return count;
63 }
64
65 static DEVICE_ATTR_RW(power_state);
66
67 static struct attribute *emc1403_attrs[] = {
68 &dev_attr_power_state.attr,
69 NULL
70 };
71 ATTRIBUTE_GROUPS(emc1403);
72
emc1403_detect(struct i2c_client * client,struct i2c_board_info * info)73 static int emc1403_detect(struct i2c_client *client,
74 struct i2c_board_info *info)
75 {
76 int id;
77 /* Check if thermal chip is SMSC and EMC1403 or EMC1423 */
78
79 id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG);
80 if (id != 0x5d)
81 return -ENODEV;
82
83 id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
84 switch (id) {
85 case 0x20:
86 strscpy(info->type, "emc1402", I2C_NAME_SIZE);
87 break;
88 case 0x21:
89 strscpy(info->type, "emc1403", I2C_NAME_SIZE);
90 break;
91 case 0x22:
92 strscpy(info->type, "emc1422", I2C_NAME_SIZE);
93 break;
94 case 0x23:
95 strscpy(info->type, "emc1423", I2C_NAME_SIZE);
96 break;
97 case 0x25:
98 strscpy(info->type, "emc1404", I2C_NAME_SIZE);
99 break;
100 case 0x27:
101 strscpy(info->type, "emc1424", I2C_NAME_SIZE);
102 break;
103 case 0x29:
104 strscpy(info->type, "emc1428", I2C_NAME_SIZE);
105 break;
106 case 0x59:
107 strscpy(info->type, "emc1438", I2C_NAME_SIZE);
108 break;
109 case 0x60:
110 strscpy(info->type, "emc1442", I2C_NAME_SIZE);
111 break;
112 default:
113 return -ENODEV;
114 }
115
116 id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
117 if (id < 0x01 || id > 0x04)
118 return -ENODEV;
119
120 return 0;
121 }
122
emc1403_regmap_is_volatile(struct device * dev,unsigned int reg)123 static bool emc1403_regmap_is_volatile(struct device *dev, unsigned int reg)
124 {
125 switch (reg) {
126 case 0x00: /* internal diode high byte */
127 case 0x01: /* external diode 1 high byte */
128 case 0x02: /* status */
129 case 0x10: /* external diode 1 low byte */
130 case 0x1b: /* external diode fault */
131 case 0x23: /* external diode 2 high byte */
132 case 0x24: /* external diode 2 low byte */
133 case 0x29: /* internal diode low byte */
134 case 0x2a: /* externl diode 3 high byte */
135 case 0x2b: /* external diode 3 low byte */
136 case 0x35: /* high limit status */
137 case 0x36: /* low limit status */
138 case 0x37: /* therm limit status */
139 case 0x41: /* external diode 4 high byte */
140 case 0x42: /* external diode 4 low byte */
141 case 0x43: /* external diode 5 high byte */
142 case 0x44: /* external diode 5 low byte */
143 case 0x45: /* external diode 6 high byte */
144 case 0x46: /* external diode 6 low byte */
145 case 0x47: /* external diode 7 high byte */
146 case 0x48: /* external diode 7 low byte */
147 return true;
148 default:
149 return false;
150 }
151 }
152
153 static const struct regmap_config emc1403_regmap_config = {
154 .reg_bits = 8,
155 .val_bits = 8,
156 .cache_type = REGCACHE_MAPLE,
157 .volatile_reg = emc1403_regmap_is_volatile,
158 };
159
160 enum emc1403_reg_map {temp_min, temp_max, temp_crit, temp_input};
161
162 static u8 ema1403_temp_map[] = {
163 [hwmon_temp_min] = temp_min,
164 [hwmon_temp_max] = temp_max,
165 [hwmon_temp_crit] = temp_crit,
166 [hwmon_temp_input] = temp_input,
167 };
168
169 static u8 emc1403_temp_regs[][4] = {
170 [0] = {
171 [temp_min] = 0x06,
172 [temp_max] = 0x05,
173 [temp_crit] = 0x20,
174 [temp_input] = 0x00,
175 },
176 [1] = {
177 [temp_min] = 0x08,
178 [temp_max] = 0x07,
179 [temp_crit] = 0x19,
180 [temp_input] = 0x01,
181 },
182 [2] = {
183 [temp_min] = 0x16,
184 [temp_max] = 0x15,
185 [temp_crit] = 0x1a,
186 [temp_input] = 0x23,
187 },
188 [3] = {
189 [temp_min] = 0x2d,
190 [temp_max] = 0x2c,
191 [temp_crit] = 0x30,
192 [temp_input] = 0x2a,
193 },
194 [4] = {
195 [temp_min] = 0x51,
196 [temp_max] = 0x50,
197 [temp_crit] = 0x64,
198 [temp_input] = 0x41,
199 },
200 [5] = {
201 [temp_min] = 0x55,
202 [temp_max] = 0x54,
203 [temp_crit] = 0x65,
204 [temp_input] = 0x43
205 },
206 [6] = {
207 [temp_min] = 0x59,
208 [temp_max] = 0x58,
209 [temp_crit] = 0x66,
210 [temp_input] = 0x45,
211 },
212 [7] = {
213 [temp_min] = 0x5d,
214 [temp_max] = 0x5c,
215 [temp_crit] = 0x67,
216 [temp_input] = 0x47,
217 },
218 };
219
220 static s8 emc1403_temp_regs_low[][4] = {
221 [0] = {
222 [temp_min] = -1,
223 [temp_max] = -1,
224 [temp_crit] = -1,
225 [temp_input] = 0x29,
226 },
227 [1] = {
228 [temp_min] = 0x14,
229 [temp_max] = 0x13,
230 [temp_crit] = -1,
231 [temp_input] = 0x10,
232 },
233 [2] = {
234 [temp_min] = 0x18,
235 [temp_max] = 0x17,
236 [temp_crit] = -1,
237 [temp_input] = 0x24,
238 },
239 [3] = {
240 [temp_min] = 0x2f,
241 [temp_max] = 0x2e,
242 [temp_crit] = -1,
243 [temp_input] = 0x2b,
244 },
245 [4] = {
246 [temp_min] = 0x53,
247 [temp_max] = 0x52,
248 [temp_crit] = -1,
249 [temp_input] = 0x42,
250 },
251 [5] = {
252 [temp_min] = 0x57,
253 [temp_max] = 0x56,
254 [temp_crit] = -1,
255 [temp_input] = 0x44,
256 },
257 [6] = {
258 [temp_min] = 0x5b,
259 [temp_max] = 0x5a,
260 [temp_crit] = -1,
261 [temp_input] = 0x46,
262 },
263 [7] = {
264 [temp_min] = 0x5f,
265 [temp_max] = 0x5e,
266 [temp_crit] = -1,
267 [temp_input] = 0x48,
268 },
269 };
270
__emc1403_get_temp(struct thermal_data * data,int channel,enum emc1403_reg_map map,long * val)271 static int __emc1403_get_temp(struct thermal_data *data, int channel,
272 enum emc1403_reg_map map, long *val)
273 {
274 unsigned int regvalh;
275 unsigned int regvall = 0;
276 int ret;
277 s8 reg;
278
279 ret = regmap_read(data->regmap, emc1403_temp_regs[channel][map], ®valh);
280 if (ret < 0)
281 return ret;
282
283 reg = emc1403_temp_regs_low[channel][map];
284 if (reg >= 0) {
285 ret = regmap_read(data->regmap, reg, ®vall);
286 if (ret < 0)
287 return ret;
288 }
289
290 if (data->chip == emc1428)
291 *val = sign_extend32((regvalh << 3) | (regvall >> 5), 10) * 125;
292 else
293 *val = ((regvalh << 3) | (regvall >> 5)) * 125;
294
295 return 0;
296 }
297
emc1403_get_temp(struct thermal_data * data,int channel,enum emc1403_reg_map map,long * val)298 static int emc1403_get_temp(struct thermal_data *data, int channel,
299 enum emc1403_reg_map map, long *val)
300 {
301 int ret;
302
303 mutex_lock(&data->mutex);
304 ret = __emc1403_get_temp(data, channel, map, val);
305 mutex_unlock(&data->mutex);
306
307 return ret;
308 }
309
emc1403_get_hyst(struct thermal_data * data,int channel,enum emc1403_reg_map map,long * val)310 static int emc1403_get_hyst(struct thermal_data *data, int channel,
311 enum emc1403_reg_map map, long *val)
312 {
313 int hyst, ret;
314 long limit;
315
316 mutex_lock(&data->mutex);
317 ret = __emc1403_get_temp(data, channel, map, &limit);
318 if (ret < 0)
319 goto unlock;
320 ret = regmap_read(data->regmap, 0x21, &hyst);
321 if (ret < 0)
322 goto unlock;
323 if (map == temp_min)
324 *val = limit + hyst * 1000;
325 else
326 *val = limit - hyst * 1000;
327 unlock:
328 mutex_unlock(&data->mutex);
329 return ret;
330 }
331
emc1403_temp_read(struct thermal_data * data,u32 attr,int channel,long * val)332 static int emc1403_temp_read(struct thermal_data *data, u32 attr, int channel, long *val)
333 {
334 unsigned int regval;
335 int ret;
336
337 switch (attr) {
338 case hwmon_temp_min:
339 case hwmon_temp_max:
340 case hwmon_temp_crit:
341 case hwmon_temp_input:
342 ret = emc1403_get_temp(data, channel, ema1403_temp_map[attr], val);
343 break;
344 case hwmon_temp_min_hyst:
345 ret = emc1403_get_hyst(data, channel, temp_min, val);
346 break;
347 case hwmon_temp_max_hyst:
348 ret = emc1403_get_hyst(data, channel, temp_max, val);
349 break;
350 case hwmon_temp_crit_hyst:
351 ret = emc1403_get_hyst(data, channel, temp_crit, val);
352 break;
353 case hwmon_temp_min_alarm:
354 if (data->chip == emc1402) {
355 ret = regmap_read(data->regmap, 0x02, ®val);
356 if (ret < 0)
357 break;
358 *val = !!(regval & BIT(5 - 2 * channel));
359 } else {
360 ret = regmap_read(data->regmap, 0x36, ®val);
361 if (ret < 0)
362 break;
363 *val = !!(regval & BIT(channel));
364 }
365 break;
366 case hwmon_temp_max_alarm:
367 if (data->chip == emc1402) {
368 ret = regmap_read(data->regmap, 0x02, ®val);
369 if (ret < 0)
370 break;
371 *val = !!(regval & BIT(6 - 2 * channel));
372 } else {
373 ret = regmap_read(data->regmap, 0x35, ®val);
374 if (ret < 0)
375 break;
376 *val = !!(regval & BIT(channel));
377 }
378 break;
379 case hwmon_temp_crit_alarm:
380 if (data->chip == emc1402) {
381 ret = regmap_read(data->regmap, 0x02, ®val);
382 if (ret < 0)
383 break;
384 *val = !!(regval & BIT(channel));
385 } else {
386 ret = regmap_read(data->regmap, 0x37, ®val);
387 if (ret < 0)
388 break;
389 *val = !!(regval & BIT(channel));
390 }
391 break;
392 case hwmon_temp_fault:
393 ret = regmap_read(data->regmap, 0x1b, ®val);
394 if (ret < 0)
395 break;
396 *val = !!(regval & BIT(channel));
397 break;
398 default:
399 return -EOPNOTSUPP;
400 }
401 return ret;
402 }
403
emc1403_get_convrate(struct thermal_data * data,long * val)404 static int emc1403_get_convrate(struct thermal_data *data, long *val)
405 {
406 unsigned int convrate;
407 int ret;
408
409 ret = regmap_read(data->regmap, 0x04, &convrate);
410 if (ret < 0)
411 return ret;
412 if (convrate > 10)
413 convrate = 4;
414
415 *val = 16000 >> convrate;
416 return 0;
417 }
418
emc1403_chip_read(struct thermal_data * data,u32 attr,long * val)419 static int emc1403_chip_read(struct thermal_data *data, u32 attr, long *val)
420 {
421 switch (attr) {
422 case hwmon_chip_update_interval:
423 return emc1403_get_convrate(data, val);
424 default:
425 return -EOPNOTSUPP;
426 }
427 }
428
emc1403_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)429 static int emc1403_read(struct device *dev, enum hwmon_sensor_types type,
430 u32 attr, int channel, long *val)
431 {
432 struct thermal_data *data = dev_get_drvdata(dev);
433
434 switch (type) {
435 case hwmon_temp:
436 return emc1403_temp_read(data, attr, channel, val);
437 case hwmon_chip:
438 return emc1403_chip_read(data, attr, val);
439 default:
440 return -EOPNOTSUPP;
441 }
442 }
443
emc1403_set_hyst(struct thermal_data * data,long val)444 static int emc1403_set_hyst(struct thermal_data *data, long val)
445 {
446 int hyst, ret;
447 long limit;
448
449 if (data->chip == emc1428)
450 val = clamp_val(val, -128000, 127000);
451 else
452 val = clamp_val(val, 0, 255000);
453
454 mutex_lock(&data->mutex);
455 ret = __emc1403_get_temp(data, 0, temp_crit, &limit);
456 if (ret < 0)
457 goto unlock;
458
459 hyst = limit - val;
460 if (data->chip == emc1428)
461 hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 127);
462 else
463 hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 255);
464 ret = regmap_write(data->regmap, 0x21, hyst);
465 unlock:
466 mutex_unlock(&data->mutex);
467 return ret;
468 }
469
emc1403_set_temp(struct thermal_data * data,int channel,enum emc1403_reg_map map,long val)470 static int emc1403_set_temp(struct thermal_data *data, int channel,
471 enum emc1403_reg_map map, long val)
472 {
473 unsigned int regval;
474 int ret;
475 u8 regh;
476 s8 regl;
477
478 regh = emc1403_temp_regs[channel][map];
479 regl = emc1403_temp_regs_low[channel][map];
480
481 mutex_lock(&data->mutex);
482 if (regl >= 0) {
483 if (data->chip == emc1428)
484 val = clamp_val(val, -128000, 127875);
485 else
486 val = clamp_val(val, 0, 255875);
487 regval = DIV_ROUND_CLOSEST(val, 125);
488 ret = regmap_write(data->regmap, regh, (regval >> 3) & 0xff);
489 if (ret < 0)
490 goto unlock;
491 ret = regmap_write(data->regmap, regl, (regval & 0x07) << 5);
492 } else {
493 if (data->chip == emc1428)
494 val = clamp_val(val, -128000, 127000);
495 else
496 val = clamp_val(val, 0, 255000);
497 regval = DIV_ROUND_CLOSEST(val, 1000);
498 ret = regmap_write(data->regmap, regh, regval);
499 }
500 unlock:
501 mutex_unlock(&data->mutex);
502 return ret;
503 }
504
emc1403_temp_write(struct thermal_data * data,u32 attr,int channel,long val)505 static int emc1403_temp_write(struct thermal_data *data, u32 attr, int channel, long val)
506 {
507 switch (attr) {
508 case hwmon_temp_min:
509 case hwmon_temp_max:
510 case hwmon_temp_crit:
511 return emc1403_set_temp(data, channel, ema1403_temp_map[attr], val);
512 case hwmon_temp_crit_hyst:
513 return emc1403_set_hyst(data, val);
514 default:
515 return -EOPNOTSUPP;
516 }
517 }
518
519 /* Lookup table for temperature conversion times in msec */
520 static const u16 ina3221_conv_time[] = {
521 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 62, 31, 16
522 };
523
emc1403_set_convrate(struct thermal_data * data,unsigned int interval)524 static int emc1403_set_convrate(struct thermal_data *data, unsigned int interval)
525 {
526 int convrate;
527
528 convrate = find_closest_descending(interval, ina3221_conv_time,
529 ARRAY_SIZE(ina3221_conv_time));
530 return regmap_write(data->regmap, 0x04, convrate);
531 }
532
emc1403_chip_write(struct thermal_data * data,u32 attr,long val)533 static int emc1403_chip_write(struct thermal_data *data, u32 attr, long val)
534 {
535 switch (attr) {
536 case hwmon_chip_update_interval:
537 return emc1403_set_convrate(data, clamp_val(val, 0, 100000));
538 default:
539 return -EOPNOTSUPP;
540 }
541 }
542
emc1403_write(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long val)543 static int emc1403_write(struct device *dev, enum hwmon_sensor_types type,
544 u32 attr, int channel, long val)
545 {
546 struct thermal_data *data = dev_get_drvdata(dev);
547
548 switch (type) {
549 case hwmon_temp:
550 return emc1403_temp_write(data, attr, channel, val);
551 case hwmon_chip:
552 return emc1403_chip_write(data, attr, val);
553 default:
554 return -EOPNOTSUPP;
555 }
556 }
557
emc1403_temp_is_visible(const void * _data,u32 attr,int channel)558 static umode_t emc1403_temp_is_visible(const void *_data, u32 attr, int channel)
559 {
560 const struct thermal_data *data = _data;
561
562 if (data->chip == emc1402 && channel > 1)
563 return 0;
564 if (data->chip == emc1403 && channel > 2)
565 return 0;
566 if (data->chip != emc1428 && channel > 3)
567 return 0;
568
569 switch (attr) {
570 case hwmon_temp_input:
571 case hwmon_temp_min_alarm:
572 case hwmon_temp_max_alarm:
573 case hwmon_temp_crit_alarm:
574 case hwmon_temp_fault:
575 case hwmon_temp_min_hyst:
576 case hwmon_temp_max_hyst:
577 return 0444;
578 case hwmon_temp_min:
579 case hwmon_temp_max:
580 case hwmon_temp_crit:
581 return 0644;
582 case hwmon_temp_crit_hyst:
583 if (channel == 0)
584 return 0644;
585 return 0444;
586 default:
587 return 0;
588 }
589 }
590
emc1403_chip_is_visible(const void * _data,u32 attr)591 static umode_t emc1403_chip_is_visible(const void *_data, u32 attr)
592 {
593 switch (attr) {
594 case hwmon_chip_update_interval:
595 return 0644;
596 default:
597 return 0;
598 }
599 }
600
emc1403_is_visible(const void * data,enum hwmon_sensor_types type,u32 attr,int channel)601 static umode_t emc1403_is_visible(const void *data, enum hwmon_sensor_types type,
602 u32 attr, int channel)
603 {
604 switch (type) {
605 case hwmon_temp:
606 return emc1403_temp_is_visible(data, attr, channel);
607 case hwmon_chip:
608 return emc1403_chip_is_visible(data, attr);
609 default:
610 return 0;
611 }
612 }
613
614 static const struct hwmon_channel_info * const emc1403_info[] = {
615 HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL),
616 HWMON_CHANNEL_INFO(temp,
617 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
618 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
619 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
620 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM,
621 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
622 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
623 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
624 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
625 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
626 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
627 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
628 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
629 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
630 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
631 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
632 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
633 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
634 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
635 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
636 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
637 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
638 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
639 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
640 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
641 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
642 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
643 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
644 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
645 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
646 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
647 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
648 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT
649 ),
650 NULL
651 };
652
653 static const struct hwmon_ops emc1403_hwmon_ops = {
654 .is_visible = emc1403_is_visible,
655 .read = emc1403_read,
656 .write = emc1403_write,
657 };
658
659 static const struct hwmon_chip_info emc1403_chip_info = {
660 .ops = &emc1403_hwmon_ops,
661 .info = emc1403_info,
662 };
663
664 /* Last digit of chip name indicates number of channels */
665 static const struct i2c_device_id emc1403_idtable[] = {
666 { "emc1402", emc1402 },
667 { "emc1403", emc1403 },
668 { "emc1404", emc1404 },
669 { "emc1412", emc1402 },
670 { "emc1413", emc1403 },
671 { "emc1414", emc1404 },
672 { "emc1422", emc1402 },
673 { "emc1423", emc1403 },
674 { "emc1424", emc1404 },
675 { "emc1428", emc1428 },
676 { "emc1438", emc1428 },
677 { "emc1442", emc1402 },
678 { }
679 };
680 MODULE_DEVICE_TABLE(i2c, emc1403_idtable);
681
emc1403_probe(struct i2c_client * client)682 static int emc1403_probe(struct i2c_client *client)
683 {
684 struct thermal_data *data;
685 struct device *hwmon_dev;
686 const struct i2c_device_id *id = i2c_match_id(emc1403_idtable, client);
687
688 data = devm_kzalloc(&client->dev, sizeof(struct thermal_data),
689 GFP_KERNEL);
690 if (!data)
691 return -ENOMEM;
692
693 data->chip = id->driver_data;
694 data->regmap = devm_regmap_init_i2c(client, &emc1403_regmap_config);
695 if (IS_ERR(data->regmap))
696 return PTR_ERR(data->regmap);
697
698 mutex_init(&data->mutex);
699
700 hwmon_dev = devm_hwmon_device_register_with_info(&client->dev,
701 client->name, data,
702 &emc1403_chip_info,
703 emc1403_groups);
704 return PTR_ERR_OR_ZERO(hwmon_dev);
705 }
706
707 static const unsigned short emc1403_address_list[] = {
708 0x18, 0x1c, 0x29, 0x3c, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END
709 };
710
711 static struct i2c_driver sensor_emc1403 = {
712 .class = I2C_CLASS_HWMON,
713 .driver = {
714 .name = "emc1403",
715 },
716 .detect = emc1403_detect,
717 .probe = emc1403_probe,
718 .id_table = emc1403_idtable,
719 .address_list = emc1403_address_list,
720 };
721
722 module_i2c_driver(sensor_emc1403);
723
724 MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
725 MODULE_DESCRIPTION("emc1403 Thermal Driver");
726 MODULE_LICENSE("GPL v2");
727