1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* tmp401.c
3 *
4 * Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com>
5 * Preliminary tmp411 support by:
6 * Gabriel Konat, Sander Leget, Wouter Willems
7 * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de>
8 *
9 * Cleanup and support for TMP431 and TMP432 by Guenter Roeck
10 * Copyright (c) 2013 Guenter Roeck <linux@roeck-us.net>
11 */
12
13 /*
14 * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
15 *
16 * Note this IC is in some aspect similar to the LM90, but it has quite a
17 * few differences too, for example the local temp has a higher resolution
18 * and thus has 16 bits registers for its value and limit instead of 8 bits.
19 */
20
21 #include <linux/bitops.h>
22 #include <linux/err.h>
23 #include <linux/i2c.h>
24 #include <linux/hwmon.h>
25 #include <linux/init.h>
26 #include <linux/module.h>
27 #include <linux/mutex.h>
28 #include <linux/regmap.h>
29 #include <linux/slab.h>
30
31 /* Addresses to scan */
32 static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4c, 0x4d,
33 0x4e, 0x4f, I2C_CLIENT_END };
34
35 enum chips { tmp401, tmp411, tmp431, tmp432, tmp435 };
36
37 /*
38 * The TMP401 registers, note some registers have different addresses for
39 * reading and writing
40 */
41 #define TMP401_STATUS 0x02
42 #define TMP401_CONFIG 0x03
43 #define TMP401_CONVERSION_RATE 0x04
44 #define TMP4XX_N_FACTOR_REG 0x18
45 #define TMP43X_BETA_RANGE 0x25
46 #define TMP401_TEMP_CRIT_HYST 0x21
47 #define TMP401_MANUFACTURER_ID_REG 0xFE
48 #define TMP401_DEVICE_ID_REG 0xFF
49
50 static const u8 TMP401_TEMP_MSB[7][3] = {
51 { 0x00, 0x01, 0x23 }, /* temp */
52 { 0x06, 0x08, 0x16 }, /* low limit */
53 { 0x05, 0x07, 0x15 }, /* high limit */
54 { 0x20, 0x19, 0x1a }, /* therm (crit) limit */
55 { 0x30, 0x34, 0x00 }, /* lowest */
56 { 0x32, 0xf6, 0x00 }, /* highest */
57 };
58
59 /* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
60 static const u8 TMP432_STATUS_REG[] = {
61 0x1b, 0x36, 0x35, 0x37 };
62
63 /* Flags */
64 #define TMP401_CONFIG_RANGE BIT(2)
65 #define TMP401_CONFIG_SHUTDOWN BIT(6)
66 #define TMP401_STATUS_LOCAL_CRIT BIT(0)
67 #define TMP401_STATUS_REMOTE_CRIT BIT(1)
68 #define TMP401_STATUS_REMOTE_OPEN BIT(2)
69 #define TMP401_STATUS_REMOTE_LOW BIT(3)
70 #define TMP401_STATUS_REMOTE_HIGH BIT(4)
71 #define TMP401_STATUS_LOCAL_LOW BIT(5)
72 #define TMP401_STATUS_LOCAL_HIGH BIT(6)
73
74 /* On TMP432, each status has its own register */
75 #define TMP432_STATUS_LOCAL BIT(0)
76 #define TMP432_STATUS_REMOTE1 BIT(1)
77 #define TMP432_STATUS_REMOTE2 BIT(2)
78
79 /* Manufacturer / Device ID's */
80 #define TMP401_MANUFACTURER_ID 0x55
81 #define TMP401_DEVICE_ID 0x11
82 #define TMP411A_DEVICE_ID 0x12
83 #define TMP411B_DEVICE_ID 0x13
84 #define TMP411C_DEVICE_ID 0x10
85 #define TMP431_DEVICE_ID 0x31
86 #define TMP432_DEVICE_ID 0x32
87 #define TMP435_DEVICE_ID 0x35
88
89 /*
90 * Driver data (common to all clients)
91 */
92
93 static const struct i2c_device_id tmp401_id[] = {
94 { "tmp401", tmp401 },
95 { "tmp411", tmp411 },
96 { "tmp431", tmp431 },
97 { "tmp432", tmp432 },
98 { "tmp435", tmp435 },
99 { }
100 };
101 MODULE_DEVICE_TABLE(i2c, tmp401_id);
102
103 /*
104 * Client data (each client gets its own)
105 */
106
107 struct tmp401_data {
108 struct i2c_client *client;
109 struct regmap *regmap;
110 struct mutex update_lock;
111 enum chips kind;
112
113 bool extended_range;
114
115 /* hwmon API configuration data */
116 u32 chip_channel_config[4];
117 struct hwmon_channel_info chip_info;
118 u32 temp_channel_config[4];
119 struct hwmon_channel_info temp_info;
120 const struct hwmon_channel_info *info[3];
121 struct hwmon_chip_info chip;
122 };
123
124 /* regmap */
125
tmp401_regmap_is_volatile(struct device * dev,unsigned int reg)126 static bool tmp401_regmap_is_volatile(struct device *dev, unsigned int reg)
127 {
128 switch (reg) {
129 case 0: /* local temp msb */
130 case 1: /* remote temp msb */
131 case 2: /* status */
132 case 0x10: /* remote temp lsb */
133 case 0x15: /* local temp lsb */
134 case 0x1b: /* status (tmp432) */
135 case 0x23 ... 0x24: /* remote temp 2 msb / lsb */
136 case 0x30 ... 0x37: /* lowest/highest temp; status (tmp432) */
137 return true;
138 default:
139 return false;
140 }
141 }
142
tmp401_reg_read(void * context,unsigned int reg,unsigned int * val)143 static int tmp401_reg_read(void *context, unsigned int reg, unsigned int *val)
144 {
145 struct tmp401_data *data = context;
146 struct i2c_client *client = data->client;
147 int regval;
148
149 switch (reg) {
150 case 0: /* local temp msb */
151 case 1: /* remote temp msb */
152 case 5: /* local temp high limit msb */
153 case 6: /* local temp low limit msb */
154 case 7: /* remote temp ligh limit msb */
155 case 8: /* remote temp low limit msb */
156 case 0x15: /* remote temp 2 high limit msb */
157 case 0x16: /* remote temp 2 low limit msb */
158 case 0x23: /* remote temp 2 msb */
159 case 0x30: /* local temp minimum, tmp411 */
160 case 0x32: /* local temp maximum, tmp411 */
161 case 0x34: /* remote temp minimum, tmp411 */
162 case 0xf6: /* remote temp maximum, tmp411 (really 0x36) */
163 /* work around register overlap between TMP411 and TMP432 */
164 if (reg == 0xf6)
165 reg = 0x36;
166 regval = i2c_smbus_read_word_swapped(client, reg);
167 if (regval < 0)
168 return regval;
169 *val = regval;
170 break;
171 case 0x19: /* critical limits, 8-bit registers */
172 case 0x1a:
173 case 0x20:
174 regval = i2c_smbus_read_byte_data(client, reg);
175 if (regval < 0)
176 return regval;
177 *val = regval << 8;
178 break;
179 case 0x1b:
180 case 0x35 ... 0x37:
181 if (data->kind == tmp432) {
182 regval = i2c_smbus_read_byte_data(client, reg);
183 if (regval < 0)
184 return regval;
185 *val = regval;
186 break;
187 }
188 /* simulate TMP432 status registers */
189 regval = i2c_smbus_read_byte_data(client, TMP401_STATUS);
190 if (regval < 0)
191 return regval;
192 *val = 0;
193 switch (reg) {
194 case 0x1b: /* open / fault */
195 if (regval & TMP401_STATUS_REMOTE_OPEN)
196 *val |= BIT(1);
197 break;
198 case 0x35: /* high limit */
199 if (regval & TMP401_STATUS_LOCAL_HIGH)
200 *val |= BIT(0);
201 if (regval & TMP401_STATUS_REMOTE_HIGH)
202 *val |= BIT(1);
203 break;
204 case 0x36: /* low limit */
205 if (regval & TMP401_STATUS_LOCAL_LOW)
206 *val |= BIT(0);
207 if (regval & TMP401_STATUS_REMOTE_LOW)
208 *val |= BIT(1);
209 break;
210 case 0x37: /* therm / crit limit */
211 if (regval & TMP401_STATUS_LOCAL_CRIT)
212 *val |= BIT(0);
213 if (regval & TMP401_STATUS_REMOTE_CRIT)
214 *val |= BIT(1);
215 break;
216 }
217 break;
218 default:
219 regval = i2c_smbus_read_byte_data(client, reg);
220 if (regval < 0)
221 return regval;
222 *val = regval;
223 break;
224 }
225 return 0;
226 }
227
tmp401_reg_write(void * context,unsigned int reg,unsigned int val)228 static int tmp401_reg_write(void *context, unsigned int reg, unsigned int val)
229 {
230 struct tmp401_data *data = context;
231 struct i2c_client *client = data->client;
232
233 switch (reg) {
234 case 0x05: /* local temp high limit msb */
235 case 0x06: /* local temp low limit msb */
236 case 0x07: /* remote temp ligh limit msb */
237 case 0x08: /* remote temp low limit msb */
238 reg += 6; /* adjust for register write address */
239 fallthrough;
240 case 0x15: /* remote temp 2 high limit msb */
241 case 0x16: /* remote temp 2 low limit msb */
242 return i2c_smbus_write_word_swapped(client, reg, val);
243 case 0x19: /* critical limits, 8-bit registers */
244 case 0x1a:
245 case 0x20:
246 return i2c_smbus_write_byte_data(client, reg, val >> 8);
247 case TMP401_CONVERSION_RATE:
248 case TMP401_CONFIG:
249 reg += 6; /* adjust for register write address */
250 fallthrough;
251 default:
252 return i2c_smbus_write_byte_data(client, reg, val);
253 }
254 }
255
256 static const struct regmap_config tmp401_regmap_config = {
257 .reg_bits = 8,
258 .val_bits = 16,
259 .cache_type = REGCACHE_MAPLE,
260 .volatile_reg = tmp401_regmap_is_volatile,
261 .reg_read = tmp401_reg_read,
262 .reg_write = tmp401_reg_write,
263 };
264
265 /* temperature conversion */
266
tmp401_register_to_temp(u16 reg,bool extended)267 static int tmp401_register_to_temp(u16 reg, bool extended)
268 {
269 int temp = reg;
270
271 if (extended)
272 temp -= 64 * 256;
273
274 return DIV_ROUND_CLOSEST(temp * 125, 32);
275 }
276
tmp401_temp_to_register(long temp,bool extended,int zbits)277 static u16 tmp401_temp_to_register(long temp, bool extended, int zbits)
278 {
279 if (extended) {
280 temp = clamp_val(temp, -64000, 191000);
281 temp += 64000;
282 } else {
283 temp = clamp_val(temp, 0, 127000);
284 }
285
286 return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
287 }
288
289 /* hwmon API functions */
290
291 static const u8 tmp401_temp_reg_index[] = {
292 [hwmon_temp_input] = 0,
293 [hwmon_temp_min] = 1,
294 [hwmon_temp_max] = 2,
295 [hwmon_temp_crit] = 3,
296 [hwmon_temp_lowest] = 4,
297 [hwmon_temp_highest] = 5,
298 };
299
300 static const u8 tmp401_status_reg_index[] = {
301 [hwmon_temp_fault] = 0,
302 [hwmon_temp_min_alarm] = 1,
303 [hwmon_temp_max_alarm] = 2,
304 [hwmon_temp_crit_alarm] = 3,
305 };
306
tmp401_temp_read(struct device * dev,u32 attr,int channel,long * val)307 static int tmp401_temp_read(struct device *dev, u32 attr, int channel, long *val)
308 {
309 struct tmp401_data *data = dev_get_drvdata(dev);
310 struct regmap *regmap = data->regmap;
311 unsigned int regs[2] = { TMP401_TEMP_MSB[3][channel], TMP401_TEMP_CRIT_HYST };
312 unsigned int regval;
313 u16 regvals[2];
314 int reg, ret;
315
316 switch (attr) {
317 case hwmon_temp_input:
318 case hwmon_temp_min:
319 case hwmon_temp_max:
320 case hwmon_temp_crit:
321 case hwmon_temp_lowest:
322 case hwmon_temp_highest:
323 reg = TMP401_TEMP_MSB[tmp401_temp_reg_index[attr]][channel];
324 ret = regmap_read(regmap, reg, ®val);
325 if (ret < 0)
326 return ret;
327 *val = tmp401_register_to_temp(regval, data->extended_range);
328 break;
329 case hwmon_temp_crit_hyst:
330 ret = regmap_multi_reg_read(regmap, regs, regvals, 2);
331 if (ret < 0)
332 return ret;
333 *val = tmp401_register_to_temp(regvals[0], data->extended_range) -
334 (regvals[1] * 1000);
335 break;
336 case hwmon_temp_fault:
337 case hwmon_temp_min_alarm:
338 case hwmon_temp_max_alarm:
339 case hwmon_temp_crit_alarm:
340 reg = TMP432_STATUS_REG[tmp401_status_reg_index[attr]];
341 ret = regmap_read(regmap, reg, ®val);
342 if (ret < 0)
343 return ret;
344 *val = !!(regval & BIT(channel));
345 break;
346 default:
347 return -EOPNOTSUPP;
348 }
349 return 0;
350 }
351
tmp401_temp_write(struct device * dev,u32 attr,int channel,long val)352 static int tmp401_temp_write(struct device *dev, u32 attr, int channel,
353 long val)
354 {
355 struct tmp401_data *data = dev_get_drvdata(dev);
356 struct regmap *regmap = data->regmap;
357 unsigned int regval;
358 int reg, ret, temp;
359
360 mutex_lock(&data->update_lock);
361 switch (attr) {
362 case hwmon_temp_min:
363 case hwmon_temp_max:
364 case hwmon_temp_crit:
365 reg = TMP401_TEMP_MSB[tmp401_temp_reg_index[attr]][channel];
366 regval = tmp401_temp_to_register(val, data->extended_range,
367 attr == hwmon_temp_crit ? 8 : 4);
368 ret = regmap_write(regmap, reg, regval);
369 break;
370 case hwmon_temp_crit_hyst:
371 if (data->extended_range)
372 val = clamp_val(val, -64000, 191000);
373 else
374 val = clamp_val(val, 0, 127000);
375
376 reg = TMP401_TEMP_MSB[3][channel];
377 ret = regmap_read(regmap, reg, ®val);
378 if (ret < 0)
379 break;
380 temp = tmp401_register_to_temp(regval, data->extended_range);
381 val = clamp_val(val, temp - 255000, temp);
382 regval = ((temp - val) + 500) / 1000;
383 ret = regmap_write(regmap, TMP401_TEMP_CRIT_HYST, regval);
384 break;
385 default:
386 ret = -EOPNOTSUPP;
387 break;
388 }
389 mutex_unlock(&data->update_lock);
390 return ret;
391 }
392
tmp401_chip_read(struct device * dev,u32 attr,int channel,long * val)393 static int tmp401_chip_read(struct device *dev, u32 attr, int channel, long *val)
394 {
395 struct tmp401_data *data = dev_get_drvdata(dev);
396 u32 regval;
397 int ret;
398
399 switch (attr) {
400 case hwmon_chip_update_interval:
401 ret = regmap_read(data->regmap, TMP401_CONVERSION_RATE, ®val);
402 if (ret < 0)
403 return ret;
404 *val = (1 << (7 - regval)) * 125;
405 break;
406 case hwmon_chip_temp_reset_history:
407 *val = 0;
408 break;
409 default:
410 return -EOPNOTSUPP;
411 }
412
413 return 0;
414 }
415
tmp401_set_convrate(struct regmap * regmap,long val)416 static int tmp401_set_convrate(struct regmap *regmap, long val)
417 {
418 int rate;
419
420 /*
421 * For valid rates, interval can be calculated as
422 * interval = (1 << (7 - rate)) * 125;
423 * Rounded rate is therefore
424 * rate = 7 - __fls(interval * 4 / (125 * 3));
425 * Use clamp_val() to avoid overflows, and to ensure valid input
426 * for __fls.
427 */
428 val = clamp_val(val, 125, 16000);
429 rate = 7 - __fls(val * 4 / (125 * 3));
430 return regmap_write(regmap, TMP401_CONVERSION_RATE, rate);
431 }
432
tmp401_chip_write(struct device * dev,u32 attr,int channel,long val)433 static int tmp401_chip_write(struct device *dev, u32 attr, int channel, long val)
434 {
435 struct tmp401_data *data = dev_get_drvdata(dev);
436 struct regmap *regmap = data->regmap;
437 int err;
438
439 mutex_lock(&data->update_lock);
440 switch (attr) {
441 case hwmon_chip_update_interval:
442 err = tmp401_set_convrate(regmap, val);
443 break;
444 case hwmon_chip_temp_reset_history:
445 if (val != 1) {
446 err = -EINVAL;
447 break;
448 }
449 /*
450 * Reset history by writing any value to any of the
451 * minimum/maximum registers (0x30-0x37).
452 */
453 err = regmap_write(regmap, 0x30, 0);
454 break;
455 default:
456 err = -EOPNOTSUPP;
457 break;
458 }
459 mutex_unlock(&data->update_lock);
460
461 return err;
462 }
463
tmp401_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)464 static int tmp401_read(struct device *dev, enum hwmon_sensor_types type,
465 u32 attr, int channel, long *val)
466 {
467 switch (type) {
468 case hwmon_chip:
469 return tmp401_chip_read(dev, attr, channel, val);
470 case hwmon_temp:
471 return tmp401_temp_read(dev, attr, channel, val);
472 default:
473 return -EOPNOTSUPP;
474 }
475 }
476
tmp401_write(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long val)477 static int tmp401_write(struct device *dev, enum hwmon_sensor_types type,
478 u32 attr, int channel, long val)
479 {
480 switch (type) {
481 case hwmon_chip:
482 return tmp401_chip_write(dev, attr, channel, val);
483 case hwmon_temp:
484 return tmp401_temp_write(dev, attr, channel, val);
485 default:
486 return -EOPNOTSUPP;
487 }
488 }
489
tmp401_is_visible(const void * data,enum hwmon_sensor_types type,u32 attr,int channel)490 static umode_t tmp401_is_visible(const void *data, enum hwmon_sensor_types type,
491 u32 attr, int channel)
492 {
493 switch (type) {
494 case hwmon_chip:
495 switch (attr) {
496 case hwmon_chip_update_interval:
497 case hwmon_chip_temp_reset_history:
498 return 0644;
499 default:
500 break;
501 }
502 break;
503 case hwmon_temp:
504 switch (attr) {
505 case hwmon_temp_input:
506 case hwmon_temp_min_alarm:
507 case hwmon_temp_max_alarm:
508 case hwmon_temp_crit_alarm:
509 case hwmon_temp_fault:
510 case hwmon_temp_lowest:
511 case hwmon_temp_highest:
512 return 0444;
513 case hwmon_temp_min:
514 case hwmon_temp_max:
515 case hwmon_temp_crit:
516 case hwmon_temp_crit_hyst:
517 return 0644;
518 default:
519 break;
520 }
521 break;
522 default:
523 break;
524 }
525 return 0;
526 }
527
528 static const struct hwmon_ops tmp401_ops = {
529 .is_visible = tmp401_is_visible,
530 .read = tmp401_read,
531 .write = tmp401_write,
532 };
533
534 /* chip initialization, detect, probe */
535
tmp401_init_client(struct tmp401_data * data)536 static int tmp401_init_client(struct tmp401_data *data)
537 {
538 struct regmap *regmap = data->regmap;
539 u32 config, config_orig;
540 int ret;
541 u32 val = 0;
542 s32 nfactor = 0;
543
544 /* Set conversion rate to 2 Hz */
545 ret = regmap_write(regmap, TMP401_CONVERSION_RATE, 5);
546 if (ret < 0)
547 return ret;
548
549 /* Start conversions (disable shutdown if necessary) */
550 ret = regmap_read(regmap, TMP401_CONFIG, &config);
551 if (ret < 0)
552 return ret;
553
554 config_orig = config;
555 config &= ~TMP401_CONFIG_SHUTDOWN;
556
557 if (of_property_read_bool(data->client->dev.of_node, "ti,extended-range-enable")) {
558 /* Enable measurement over extended temperature range */
559 config |= TMP401_CONFIG_RANGE;
560 }
561
562 data->extended_range = !!(config & TMP401_CONFIG_RANGE);
563
564 if (config != config_orig) {
565 ret = regmap_write(regmap, TMP401_CONFIG, config);
566 if (ret < 0)
567 return ret;
568 }
569
570 ret = of_property_read_u32(data->client->dev.of_node, "ti,n-factor", &nfactor);
571 if (!ret) {
572 if (data->kind == tmp401) {
573 dev_err(&data->client->dev, "ti,tmp401 does not support n-factor correction\n");
574 return -EINVAL;
575 }
576 if (nfactor < -128 || nfactor > 127) {
577 dev_err(&data->client->dev, "n-factor is invalid (%d)\n", nfactor);
578 return -EINVAL;
579 }
580 ret = regmap_write(regmap, TMP4XX_N_FACTOR_REG, (unsigned int)nfactor);
581 if (ret < 0)
582 return ret;
583 }
584
585 ret = of_property_read_u32(data->client->dev.of_node, "ti,beta-compensation", &val);
586 if (!ret) {
587 if (data->kind == tmp401 || data->kind == tmp411) {
588 dev_err(&data->client->dev, "ti,tmp401 or ti,tmp411 does not support beta compensation\n");
589 return -EINVAL;
590 }
591 if (val > 15) {
592 dev_err(&data->client->dev, "beta-compensation is invalid (%u)\n", val);
593 return -EINVAL;
594 }
595 ret = regmap_write(regmap, TMP43X_BETA_RANGE, val);
596 if (ret < 0)
597 return ret;
598 }
599
600 return 0;
601 }
602
tmp401_detect(struct i2c_client * client,struct i2c_board_info * info)603 static int tmp401_detect(struct i2c_client *client,
604 struct i2c_board_info *info)
605 {
606 enum chips kind;
607 struct i2c_adapter *adapter = client->adapter;
608 u8 reg;
609
610 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
611 return -ENODEV;
612
613 /* Detect and identify the chip */
614 reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
615 if (reg != TMP401_MANUFACTURER_ID)
616 return -ENODEV;
617
618 reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
619
620 switch (reg) {
621 case TMP401_DEVICE_ID:
622 if (client->addr != 0x4c)
623 return -ENODEV;
624 kind = tmp401;
625 break;
626 case TMP411A_DEVICE_ID:
627 if (client->addr != 0x4c)
628 return -ENODEV;
629 kind = tmp411;
630 break;
631 case TMP411B_DEVICE_ID:
632 if (client->addr != 0x4d)
633 return -ENODEV;
634 kind = tmp411;
635 break;
636 case TMP411C_DEVICE_ID:
637 if (client->addr != 0x4e)
638 return -ENODEV;
639 kind = tmp411;
640 break;
641 case TMP431_DEVICE_ID:
642 if (client->addr != 0x4c && client->addr != 0x4d)
643 return -ENODEV;
644 kind = tmp431;
645 break;
646 case TMP432_DEVICE_ID:
647 if (client->addr != 0x4c && client->addr != 0x4d)
648 return -ENODEV;
649 kind = tmp432;
650 break;
651 case TMP435_DEVICE_ID:
652 kind = tmp435;
653 break;
654 default:
655 return -ENODEV;
656 }
657
658 reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG);
659 if (reg & 0x1b)
660 return -ENODEV;
661
662 reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE);
663 /* Datasheet says: 0x1-0x6 */
664 if (reg > 15)
665 return -ENODEV;
666
667 strscpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
668
669 return 0;
670 }
671
tmp401_probe(struct i2c_client * client)672 static int tmp401_probe(struct i2c_client *client)
673 {
674 static const char * const names[] = {
675 "TMP401", "TMP411", "TMP431", "TMP432", "TMP435"
676 };
677 struct device *dev = &client->dev;
678 struct hwmon_channel_info *info;
679 struct device *hwmon_dev;
680 struct tmp401_data *data;
681 int status;
682
683 data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
684 if (!data)
685 return -ENOMEM;
686
687 data->client = client;
688 mutex_init(&data->update_lock);
689 data->kind = (uintptr_t)i2c_get_match_data(client);
690
691 data->regmap = devm_regmap_init(dev, NULL, data, &tmp401_regmap_config);
692 if (IS_ERR(data->regmap))
693 return PTR_ERR(data->regmap);
694
695 /* initialize configuration data */
696 data->chip.ops = &tmp401_ops;
697 data->chip.info = data->info;
698
699 data->info[0] = &data->chip_info;
700 data->info[1] = &data->temp_info;
701
702 info = &data->chip_info;
703 info->type = hwmon_chip;
704 info->config = data->chip_channel_config;
705
706 data->chip_channel_config[0] = HWMON_C_UPDATE_INTERVAL;
707
708 info = &data->temp_info;
709 info->type = hwmon_temp;
710 info->config = data->temp_channel_config;
711
712 data->temp_channel_config[0] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
713 HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
714 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM;
715 data->temp_channel_config[1] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
716 HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
717 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT;
718
719 if (data->kind == tmp411) {
720 data->temp_channel_config[0] |= HWMON_T_HIGHEST | HWMON_T_LOWEST;
721 data->temp_channel_config[1] |= HWMON_T_HIGHEST | HWMON_T_LOWEST;
722 data->chip_channel_config[0] |= HWMON_C_TEMP_RESET_HISTORY;
723 }
724
725 if (data->kind == tmp432) {
726 data->temp_channel_config[2] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
727 HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
728 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT;
729 }
730
731 /* Initialize the TMP401 chip */
732 status = tmp401_init_client(data);
733 if (status < 0)
734 return status;
735
736 hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data,
737 &data->chip, NULL);
738 if (IS_ERR(hwmon_dev))
739 return PTR_ERR(hwmon_dev);
740
741 dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
742
743 return 0;
744 }
745
746 static const struct of_device_id __maybe_unused tmp4xx_of_match[] = {
747 { .compatible = "ti,tmp401", },
748 { .compatible = "ti,tmp411", },
749 { .compatible = "ti,tmp431", },
750 { .compatible = "ti,tmp432", },
751 { .compatible = "ti,tmp435", },
752 { },
753 };
754 MODULE_DEVICE_TABLE(of, tmp4xx_of_match);
755
756 static struct i2c_driver tmp401_driver = {
757 .class = I2C_CLASS_HWMON,
758 .driver = {
759 .name = "tmp401",
760 .of_match_table = of_match_ptr(tmp4xx_of_match),
761 },
762 .probe = tmp401_probe,
763 .id_table = tmp401_id,
764 .detect = tmp401_detect,
765 .address_list = normal_i2c,
766 };
767
768 module_i2c_driver(tmp401_driver);
769
770 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
771 MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
772 MODULE_LICENSE("GPL");
773