1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net>
4 *
5 * based on max1668.c
6 * Copyright (c) 2011 David George <david.george@ska.ac.za>
7 */
8
9#include <linux/bitfield.h>
10#include <linux/bits.h>
11#include <linux/err.h>
12#include <linux/hwmon.h>
13#include <linux/i2c.h>
14#include <linux/init.h>
15#include <linux/module.h>
16#include <linux/of.h>
17#include <linux/regmap.h>
18#include <linux/slab.h>
19
20enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694,
21 max6697, max6698, max6699 };
22
23/* Report local sensor as temp1 */
24
25static const u8 MAX6697_REG_TEMP[] = {
26 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 };
27static const u8 MAX6697_REG_TEMP_EXT[] = {
28 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 };
29static const u8 MAX6697_REG_MAX[] = {
30 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 };
31static const u8 MAX6697_REG_CRIT[] = {
32 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 };
33
34#define MAX6697_REG_MIN 0x30
35/*
36 * Map device tree / internal register bit map to chip bit map.
37 * Applies to alert register and over-temperature register.
38 */
39
40#define MAX6697_EXTERNAL_MASK_DT GENMASK(7, 1)
41#define MAX6697_LOCAL_MASK_DT BIT(0)
42#define MAX6697_EXTERNAL_MASK_CHIP GENMASK(6, 0)
43#define MAX6697_LOCAL_MASK_CHIP BIT(7)
44
45/* alert - local channel is in bit 6 */
46#define MAX6697_ALERT_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \
47 (((reg) & 0x01) << 6) | ((reg) & 0x80))
48
49/* over-temperature - local channel is in bit 7 */
50#define MAX6697_OVERT_MAP_BITS(reg) \
51 (FIELD_PREP(MAX6697_EXTERNAL_MASK_CHIP, FIELD_GET(MAX6697_EXTERNAL_MASK_DT, reg)) | \
52 FIELD_PREP(MAX6697_LOCAL_MASK_CHIP, FIELD_GET(MAX6697_LOCAL_MASK_DT, reg)))
53
54#define MAX6697_REG_STAT_ALARM 0x44
55#define MAX6697_REG_STAT_CRIT 0x45
56#define MAX6697_REG_STAT_FAULT 0x46
57#define MAX6697_REG_STAT_MIN_ALARM 0x47
58
59#define MAX6697_REG_CONFIG 0x41
60#define MAX6581_CONF_EXTENDED BIT(1)
61#define MAX6693_CONF_BETA BIT(2)
62#define MAX6697_CONF_RESISTANCE BIT(3)
63#define MAX6697_CONF_TIMEOUT BIT(5)
64#define MAX6697_REG_ALERT_MASK 0x42
65#define MAX6697_REG_OVERT_MASK 0x43
66
67#define MAX6581_REG_RESISTANCE 0x4a
68#define MAX6581_REG_IDEALITY 0x4b
69#define MAX6581_REG_IDEALITY_SELECT 0x4c
70#define MAX6581_REG_OFFSET 0x4d
71#define MAX6581_REG_OFFSET_SELECT 0x4e
72#define MAX6581_OFFSET_MIN -31750
73#define MAX6581_OFFSET_MAX 31750
74
75#define MAX6697_CONV_TIME 156 /* ms per channel, worst case */
76
77struct max6697_chip_data {
78 int channels;
79 u32 have_ext;
80 u32 have_crit;
81 u32 have_fault;
82 u8 valid_conf;
83};
84
85struct max6697_data {
86 struct regmap *regmap;
87
88 enum chips type;
89 const struct max6697_chip_data *chip;
90
91 int temp_offset; /* in degrees C */
92
93#define MAX6697_TEMP_INPUT 0
94#define MAX6697_TEMP_EXT 1
95#define MAX6697_TEMP_MAX 2
96#define MAX6697_TEMP_CRIT 3
97 u32 alarms;
98};
99
100static const struct max6697_chip_data max6697_chip_data[] = {
101 [max6581] = {
102 .channels = 8,
103 .have_crit = 0xff,
104 .have_ext = 0x7f,
105 .have_fault = 0xfe,
106 .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT,
107 },
108 [max6602] = {
109 .channels = 5,
110 .have_crit = 0x12,
111 .have_ext = 0x02,
112 .have_fault = 0x1e,
113 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
114 },
115 [max6622] = {
116 .channels = 5,
117 .have_crit = 0x12,
118 .have_ext = 0x02,
119 .have_fault = 0x1e,
120 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
121 },
122 [max6636] = {
123 .channels = 7,
124 .have_crit = 0x72,
125 .have_ext = 0x02,
126 .have_fault = 0x7e,
127 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
128 },
129 [max6689] = {
130 .channels = 7,
131 .have_crit = 0x72,
132 .have_ext = 0x02,
133 .have_fault = 0x7e,
134 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
135 },
136 [max6693] = {
137 .channels = 7,
138 .have_crit = 0x72,
139 .have_ext = 0x02,
140 .have_fault = 0x7e,
141 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
142 MAX6697_CONF_TIMEOUT,
143 },
144 [max6694] = {
145 .channels = 5,
146 .have_crit = 0x12,
147 .have_ext = 0x02,
148 .have_fault = 0x1e,
149 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
150 MAX6697_CONF_TIMEOUT,
151 },
152 [max6697] = {
153 .channels = 7,
154 .have_crit = 0x72,
155 .have_ext = 0x02,
156 .have_fault = 0x7e,
157 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
158 },
159 [max6698] = {
160 .channels = 7,
161 .have_crit = 0x72,
162 .have_ext = 0x02,
163 .have_fault = 0x0e,
164 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
165 },
166 [max6699] = {
167 .channels = 5,
168 .have_crit = 0x12,
169 .have_ext = 0x02,
170 .have_fault = 0x1e,
171 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
172 },
173};
174
175static int max6697_alarm_channel_map(int channel)
176{
177 switch (channel) {
178 case 0:
179 return 6;
180 case 7:
181 return 7;
182 default:
183 return channel - 1;
184 }
185}
186
187static int max6697_read(struct device *dev, enum hwmon_sensor_types type,
188 u32 attr, int channel, long *val)
189{
190 unsigned int offset_regs[2] = { MAX6581_REG_OFFSET_SELECT, MAX6581_REG_OFFSET };
191 unsigned int temp_regs[2] = { MAX6697_REG_TEMP[channel],
192 MAX6697_REG_TEMP_EXT[channel] };
193 struct max6697_data *data = dev_get_drvdata(dev);
194 struct regmap *regmap = data->regmap;
195 u8 regdata[2] = { };
196 u32 regval;
197 int ret;
198
199 switch (attr) {
200 case hwmon_temp_input:
201 ret = regmap_multi_reg_read(map: regmap, reg: temp_regs, val: regdata,
202 val_count: data->chip->have_ext & BIT(channel) ? 2 : 1);
203 if (ret)
204 return ret;
205 *val = (((regdata[0] - data->temp_offset) << 3) | (regdata[1] >> 5)) * 125;
206 break;
207 case hwmon_temp_max:
208 ret = regmap_read(map: regmap, reg: MAX6697_REG_MAX[channel], val: &regval);
209 if (ret)
210 return ret;
211 *val = ((int)regval - data->temp_offset) * 1000;
212 break;
213 case hwmon_temp_crit:
214 ret = regmap_read(map: regmap, reg: MAX6697_REG_CRIT[channel], val: &regval);
215 if (ret)
216 return ret;
217 *val = ((int)regval - data->temp_offset) * 1000;
218 break;
219 case hwmon_temp_min:
220 ret = regmap_read(map: regmap, MAX6697_REG_MIN, val: &regval);
221 if (ret)
222 return ret;
223 *val = ((int)regval - data->temp_offset) * 1000;
224 break;
225 case hwmon_temp_offset:
226 ret = regmap_multi_reg_read(map: regmap, reg: offset_regs, val: regdata, val_count: 2);
227 if (ret)
228 return ret;
229
230 if (!(regdata[0] & BIT(channel - 1)))
231 regdata[1] = 0;
232
233 *val = sign_extend32(value: regdata[1], index: 7) * 250;
234 break;
235 case hwmon_temp_fault:
236 ret = regmap_read(map: regmap, MAX6697_REG_STAT_FAULT, val: &regval);
237 if (ret)
238 return ret;
239 if (data->type == max6581)
240 *val = !!(regval & BIT(channel - 1));
241 else
242 *val = !!(regval & BIT(channel));
243 break;
244 case hwmon_temp_crit_alarm:
245 ret = regmap_read(map: regmap, MAX6697_REG_STAT_CRIT, val: &regval);
246 if (ret)
247 return ret;
248 /*
249 * In the MAX6581 datasheet revision 0 to 3, the local channel
250 * overtemperature status is reported in bit 6 of register 0x45,
251 * and the overtemperature status for remote channel 7 is
252 * reported in bit 7. In Revision 4 and later, the local channel
253 * overtemperature status is reported in bit 7, and the remote
254 * channel 7 overtemperature status is reported in bit 6. A real
255 * chip was found to match the functionality documented in
256 * Revision 4 and later.
257 */
258 *val = !!(regval & BIT(channel ? channel - 1 : 7));
259 break;
260 case hwmon_temp_max_alarm:
261 ret = regmap_read(map: regmap, MAX6697_REG_STAT_ALARM, val: &regval);
262 if (ret)
263 return ret;
264 *val = !!(regval & BIT(max6697_alarm_channel_map(channel)));
265 break;
266 case hwmon_temp_min_alarm:
267 ret = regmap_read(map: regmap, MAX6697_REG_STAT_MIN_ALARM, val: &regval);
268 if (ret)
269 return ret;
270 *val = !!(regval & BIT(max6697_alarm_channel_map(channel)));
271 break;
272 default:
273 return -EOPNOTSUPP;
274 }
275 return 0;
276}
277
278static int max6697_write(struct device *dev, enum hwmon_sensor_types type,
279 u32 attr, int channel, long val)
280{
281 struct max6697_data *data = dev_get_drvdata(dev);
282 struct regmap *regmap = data->regmap;
283 int ret;
284
285 switch (attr) {
286 case hwmon_temp_max:
287 val = clamp_val(val, -1000000, 1000000); /* prevent underflow */
288 val = DIV_ROUND_CLOSEST(val, 1000) + data->temp_offset;
289 val = clamp_val(val, 0, data->type == max6581 ? 255 : 127);
290 return regmap_write(map: regmap, reg: MAX6697_REG_MAX[channel], val);
291 case hwmon_temp_crit:
292 val = clamp_val(val, -1000000, 1000000); /* prevent underflow */
293 val = DIV_ROUND_CLOSEST(val, 1000) + data->temp_offset;
294 val = clamp_val(val, 0, data->type == max6581 ? 255 : 127);
295 return regmap_write(map: regmap, reg: MAX6697_REG_CRIT[channel], val);
296 case hwmon_temp_min:
297 val = clamp_val(val, -1000000, 1000000); /* prevent underflow */
298 val = DIV_ROUND_CLOSEST(val, 1000) + data->temp_offset;
299 val = clamp_val(val, 0, 255);
300 return regmap_write(map: regmap, MAX6697_REG_MIN, val);
301 case hwmon_temp_offset:
302 val = clamp_val(val, MAX6581_OFFSET_MIN, MAX6581_OFFSET_MAX);
303 val = DIV_ROUND_CLOSEST(val, 250);
304 if (!val) { /* disable this (and only this) channel */
305 ret = regmap_clear_bits(map: regmap, MAX6581_REG_OFFSET_SELECT,
306 BIT(channel - 1));
307 } else {
308 /* enable channel and update offset */
309 ret = regmap_set_bits(map: regmap, MAX6581_REG_OFFSET_SELECT,
310 BIT(channel - 1));
311 if (ret)
312 return ret;
313 ret = regmap_write(map: regmap, MAX6581_REG_OFFSET, val);
314 }
315 return ret;
316 default:
317 return -EOPNOTSUPP;
318 }
319}
320
321static umode_t max6697_is_visible(const void *_data, enum hwmon_sensor_types type,
322 u32 attr, int channel)
323{
324 const struct max6697_data *data = _data;
325 const struct max6697_chip_data *chip = data->chip;
326
327 if (channel >= chip->channels)
328 return 0;
329
330 switch (attr) {
331 case hwmon_temp_max:
332 return 0644;
333 case hwmon_temp_input:
334 case hwmon_temp_max_alarm:
335 return 0444;
336 case hwmon_temp_min:
337 if (data->type == max6581)
338 return channel ? 0444 : 0644;
339 break;
340 case hwmon_temp_min_alarm:
341 if (data->type == max6581)
342 return 0444;
343 break;
344 case hwmon_temp_crit:
345 if (chip->have_crit & BIT(channel))
346 return 0644;
347 break;
348 case hwmon_temp_crit_alarm:
349 if (chip->have_crit & BIT(channel))
350 return 0444;
351 break;
352 case hwmon_temp_fault:
353 if (chip->have_fault & BIT(channel))
354 return 0444;
355 break;
356 case hwmon_temp_offset:
357 if (data->type == max6581 && channel)
358 return 0644;
359 break;
360 default:
361 break;
362 }
363 return 0;
364}
365
366/* Return 0 if detection is successful, -ENODEV otherwise */
367static const struct hwmon_channel_info * const max6697_info[] = {
368 HWMON_CHANNEL_INFO(temp,
369 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
370 HWMON_T_MIN | HWMON_T_MIN_ALARM |
371 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM,
372 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
373 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
374 HWMON_T_MIN | HWMON_T_MIN_ALARM |
375 HWMON_T_FAULT | HWMON_T_OFFSET,
376 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
377 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
378 HWMON_T_MIN | HWMON_T_MIN_ALARM |
379 HWMON_T_FAULT | HWMON_T_OFFSET,
380 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
381 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
382 HWMON_T_MIN | HWMON_T_MIN_ALARM |
383 HWMON_T_FAULT | HWMON_T_OFFSET,
384 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
385 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
386 HWMON_T_MIN | HWMON_T_MIN_ALARM |
387 HWMON_T_FAULT | HWMON_T_OFFSET,
388 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
389 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
390 HWMON_T_MIN | HWMON_T_MIN_ALARM |
391 HWMON_T_FAULT | HWMON_T_OFFSET,
392 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
393 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
394 HWMON_T_MIN | HWMON_T_MIN_ALARM |
395 HWMON_T_FAULT | HWMON_T_OFFSET,
396 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
397 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
398 HWMON_T_MIN | HWMON_T_MIN_ALARM |
399 HWMON_T_FAULT | HWMON_T_OFFSET),
400 NULL
401};
402
403static const struct hwmon_ops max6697_hwmon_ops = {
404 .is_visible = max6697_is_visible,
405 .read = max6697_read,
406 .write = max6697_write,
407};
408
409static const struct hwmon_chip_info max6697_chip_info = {
410 .ops = &max6697_hwmon_ops,
411 .info = max6697_info,
412};
413
414static int max6697_config_of(struct device_node *node, struct max6697_data *data)
415{
416 const struct max6697_chip_data *chip = data->chip;
417 struct regmap *regmap = data->regmap;
418 int ret, confreg;
419 u32 vals[2];
420
421 confreg = 0;
422 if (of_property_read_bool(np: node, propname: "smbus-timeout-disable") &&
423 (chip->valid_conf & MAX6697_CONF_TIMEOUT)) {
424 confreg |= MAX6697_CONF_TIMEOUT;
425 }
426 if (of_property_read_bool(np: node, propname: "extended-range-enable") &&
427 (chip->valid_conf & MAX6581_CONF_EXTENDED)) {
428 confreg |= MAX6581_CONF_EXTENDED;
429 data->temp_offset = 64;
430 }
431 if (of_property_read_bool(np: node, propname: "beta-compensation-enable") &&
432 (chip->valid_conf & MAX6693_CONF_BETA)) {
433 confreg |= MAX6693_CONF_BETA;
434 }
435
436 if (of_property_read_u32(np: node, propname: "alert-mask", out_value: vals))
437 vals[0] = 0;
438 ret = regmap_write(map: regmap, MAX6697_REG_ALERT_MASK,
439 MAX6697_ALERT_MAP_BITS(vals[0]));
440 if (ret)
441 return ret;
442
443 if (of_property_read_u32(np: node, propname: "over-temperature-mask", out_value: vals))
444 vals[0] = 0;
445 ret = regmap_write(map: regmap, MAX6697_REG_OVERT_MASK,
446 MAX6697_OVERT_MAP_BITS(vals[0]));
447 if (ret)
448 return ret;
449
450 if (data->type != max6581) {
451 if (of_property_read_bool(np: node, propname: "resistance-cancellation") &&
452 chip->valid_conf & MAX6697_CONF_RESISTANCE) {
453 confreg |= MAX6697_CONF_RESISTANCE;
454 }
455 } else {
456 if (of_property_read_u32(np: node, propname: "resistance-cancellation", out_value: &vals[0])) {
457 if (of_property_read_bool(np: node, propname: "resistance-cancellation"))
458 vals[0] = 0xfe;
459 else
460 vals[0] = 0;
461 }
462
463 vals[0] &= 0xfe;
464 ret = regmap_write(map: regmap, MAX6581_REG_RESISTANCE, val: vals[0] >> 1);
465 if (ret < 0)
466 return ret;
467
468 if (of_property_read_u32_array(np: node, propname: "transistor-ideality", out_values: vals, sz: 2)) {
469 vals[0] = 0;
470 vals[1] = 0;
471 }
472
473 ret = regmap_write(map: regmap, MAX6581_REG_IDEALITY, val: vals[1]);
474 if (ret < 0)
475 return ret;
476 ret = regmap_write(map: regmap, MAX6581_REG_IDEALITY_SELECT,
477 val: (vals[0] & 0xfe) >> 1);
478 if (ret < 0)
479 return ret;
480 }
481 return regmap_write(map: regmap, MAX6697_REG_CONFIG, val: confreg);
482}
483
484static int max6697_init_chip(struct device_node *np, struct max6697_data *data)
485{
486 unsigned int reg;
487 int ret;
488
489 /*
490 * Don't touch configuration if there is no devicetree configuration.
491 * If that is the case, use the current chip configuration.
492 */
493 if (!np) {
494 struct regmap *regmap = data->regmap;
495
496 ret = regmap_read(map: regmap, MAX6697_REG_CONFIG, val: &reg);
497 if (ret < 0)
498 return ret;
499 if (data->type == max6581) {
500 if (reg & MAX6581_CONF_EXTENDED)
501 data->temp_offset = 64;
502 ret = regmap_read(map: regmap, MAX6581_REG_RESISTANCE, val: &reg);
503 }
504 } else {
505 ret = max6697_config_of(node: np, data);
506 }
507
508 return ret;
509}
510
511static bool max6697_volatile_reg(struct device *dev, unsigned int reg)
512{
513 switch (reg) {
514 case 0x00 ... 0x09: /* temperature high bytes */
515 case 0x44 ... 0x47: /* status */
516 case 0x51 ... 0x58: /* temperature low bytes */
517 return true;
518 default:
519 return false;
520 }
521}
522
523static bool max6697_writeable_reg(struct device *dev, unsigned int reg)
524{
525 return reg != 0x0a && reg != 0x0f && !max6697_volatile_reg(dev, reg);
526}
527
528static const struct regmap_config max6697_regmap_config = {
529 .reg_bits = 8,
530 .val_bits = 8,
531 .max_register = 0x58,
532 .writeable_reg = max6697_writeable_reg,
533 .volatile_reg = max6697_volatile_reg,
534 .cache_type = REGCACHE_MAPLE,
535};
536
537static int max6697_probe(struct i2c_client *client)
538{
539 struct device *dev = &client->dev;
540 struct max6697_data *data;
541 struct device *hwmon_dev;
542 struct regmap *regmap;
543 int err;
544
545 regmap = devm_regmap_init_i2c(client, &max6697_regmap_config);
546 if (IS_ERR(ptr: regmap))
547 return PTR_ERR(ptr: regmap);
548
549 data = devm_kzalloc(dev, size: sizeof(struct max6697_data), GFP_KERNEL);
550 if (!data)
551 return -ENOMEM;
552
553 data->regmap = regmap;
554 data->type = (uintptr_t)i2c_get_match_data(client);
555 data->chip = &max6697_chip_data[data->type];
556
557 err = max6697_init_chip(np: client->dev.of_node, data);
558 if (err)
559 return err;
560
561 hwmon_dev = devm_hwmon_device_register_with_info(dev, name: client->name, drvdata: data,
562 info: &max6697_chip_info, NULL);
563 return PTR_ERR_OR_ZERO(ptr: hwmon_dev);
564}
565
566static const struct i2c_device_id max6697_id[] = {
567 { "max6581", max6581 },
568 { "max6602", max6602 },
569 { "max6622", max6622 },
570 { "max6636", max6636 },
571 { "max6689", max6689 },
572 { "max6693", max6693 },
573 { "max6694", max6694 },
574 { "max6697", max6697 },
575 { "max6698", max6698 },
576 { "max6699", max6699 },
577 { }
578};
579MODULE_DEVICE_TABLE(i2c, max6697_id);
580
581static const struct of_device_id __maybe_unused max6697_of_match[] = {
582 {
583 .compatible = "maxim,max6581",
584 .data = (void *)max6581
585 },
586 {
587 .compatible = "maxim,max6602",
588 .data = (void *)max6602
589 },
590 {
591 .compatible = "maxim,max6622",
592 .data = (void *)max6622
593 },
594 {
595 .compatible = "maxim,max6636",
596 .data = (void *)max6636
597 },
598 {
599 .compatible = "maxim,max6689",
600 .data = (void *)max6689
601 },
602 {
603 .compatible = "maxim,max6693",
604 .data = (void *)max6693
605 },
606 {
607 .compatible = "maxim,max6694",
608 .data = (void *)max6694
609 },
610 {
611 .compatible = "maxim,max6697",
612 .data = (void *)max6697
613 },
614 {
615 .compatible = "maxim,max6698",
616 .data = (void *)max6698
617 },
618 {
619 .compatible = "maxim,max6699",
620 .data = (void *)max6699
621 },
622 { },
623};
624MODULE_DEVICE_TABLE(of, max6697_of_match);
625
626static struct i2c_driver max6697_driver = {
627 .driver = {
628 .name = "max6697",
629 .of_match_table = of_match_ptr(max6697_of_match),
630 },
631 .probe = max6697_probe,
632 .id_table = max6697_id,
633};
634
635module_i2c_driver(max6697_driver);
636
637MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
638MODULE_DESCRIPTION("MAX6697 temperature sensor driver");
639MODULE_LICENSE("GPL");
640

source code of linux/drivers/hwmon/max6697.c