2 * Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net>
5 * Copyright (c) 2011 David George <david.george@ska.ac.za>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/slab.h>
21 #include <linux/jiffies.h>
22 #include <linux/i2c.h>
23 #include <linux/hwmon.h>
24 #include <linux/hwmon-sysfs.h>
25 #include <linux/err.h>
26 #include <linux/mutex.h>
29 #include <linux/platform_data/max6697.h>
31 enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694,
32 max6697, max6698, max6699 };
34 /* Report local sensor as temp1 */
36 static const u8 MAX6697_REG_TEMP[] = {
37 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 };
38 static const u8 MAX6697_REG_TEMP_EXT[] = {
39 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 };
40 static const u8 MAX6697_REG_MAX[] = {
41 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 };
42 static const u8 MAX6697_REG_CRIT[] = {
43 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 };
46 * Map device tree / platform data register bit map to chip bit map.
47 * Applies to alert register and over-temperature register.
49 #define MAX6697_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \
50 (((reg) & 0x01) << 6) | ((reg) & 0x80))
52 #define MAX6697_REG_STAT(n) (0x44 + (n))
54 #define MAX6697_REG_CONFIG 0x41
55 #define MAX6581_CONF_EXTENDED (1 << 1)
56 #define MAX6693_CONF_BETA (1 << 2)
57 #define MAX6697_CONF_RESISTANCE (1 << 3)
58 #define MAX6697_CONF_TIMEOUT (1 << 5)
59 #define MAX6697_REG_ALERT_MASK 0x42
60 #define MAX6697_REG_OVERT_MASK 0x43
62 #define MAX6581_REG_RESISTANCE 0x4a
63 #define MAX6581_REG_IDEALITY 0x4b
64 #define MAX6581_REG_IDEALITY_SELECT 0x4c
65 #define MAX6581_REG_OFFSET 0x4d
66 #define MAX6581_REG_OFFSET_SELECT 0x4e
68 #define MAX6697_CONV_TIME 156 /* ms per channel, worst case */
70 struct max6697_chip_data {
80 struct device *hwmon_dev;
83 const struct max6697_chip_data *chip;
85 int update_interval; /* in milli-seconds */
86 int temp_offset; /* in degrees C */
88 struct mutex update_lock;
89 unsigned long last_updated; /* In jiffies */
90 bool valid; /* true if following fields are valid */
92 /* 1x local and up to 7x remote */
93 u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */
94 #define MAX6697_TEMP_INPUT 0
95 #define MAX6697_TEMP_EXT 1
96 #define MAX6697_TEMP_MAX 2
97 #define MAX6697_TEMP_CRIT 3
101 /* Diode fault status bits on MAX6581 are right shifted by one bit */
102 static const u8 max6581_alarm_map[] = {
103 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15,
104 16, 17, 18, 19, 20, 21, 22, 23 };
106 static const struct max6697_chip_data max6697_chip_data[] = {
112 .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT,
113 .alarm_map = max6581_alarm_map,
120 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
127 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
134 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
141 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
148 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
149 MAX6697_CONF_TIMEOUT,
156 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
157 MAX6697_CONF_TIMEOUT,
164 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
171 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
178 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
182 static struct max6697_data *max6697_update_device(struct device *dev)
184 struct i2c_client *client = to_i2c_client(dev);
185 struct max6697_data *data = i2c_get_clientdata(client);
186 struct max6697_data *ret = data;
191 mutex_lock(&data->update_lock);
194 !time_after(jiffies, data->last_updated
195 + msecs_to_jiffies(data->update_interval)))
198 for (i = 0; i < data->chip->channels; i++) {
199 if (data->chip->have_ext & (1 << i)) {
200 val = i2c_smbus_read_byte_data(client,
201 MAX6697_REG_TEMP_EXT[i]);
202 if (unlikely(val < 0)) {
206 data->temp[i][MAX6697_TEMP_EXT] = val;
209 val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]);
210 if (unlikely(val < 0)) {
214 data->temp[i][MAX6697_TEMP_INPUT] = val;
216 val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]);
217 if (unlikely(val < 0)) {
221 data->temp[i][MAX6697_TEMP_MAX] = val;
223 if (data->chip->have_crit & (1 << i)) {
224 val = i2c_smbus_read_byte_data(client,
225 MAX6697_REG_CRIT[i]);
226 if (unlikely(val < 0)) {
230 data->temp[i][MAX6697_TEMP_CRIT] = val;
235 for (i = 0; i < 3; i++) {
236 val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i));
237 if (unlikely(val < 0)) {
241 alarms = (alarms << 8) | val;
243 data->alarms = alarms;
244 data->last_updated = jiffies;
247 mutex_unlock(&data->update_lock);
252 static ssize_t show_temp_input(struct device *dev,
253 struct device_attribute *devattr, char *buf)
255 int index = to_sensor_dev_attr(devattr)->index;
256 struct max6697_data *data = max6697_update_device(dev);
260 return PTR_ERR(data);
262 temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3;
263 temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5;
265 return sprintf(buf, "%d\n", temp * 125);
268 static ssize_t show_temp(struct device *dev,
269 struct device_attribute *devattr, char *buf)
271 int nr = to_sensor_dev_attr_2(devattr)->nr;
272 int index = to_sensor_dev_attr_2(devattr)->index;
273 struct max6697_data *data = max6697_update_device(dev);
277 return PTR_ERR(data);
279 temp = data->temp[nr][index];
280 temp -= data->temp_offset;
282 return sprintf(buf, "%d\n", temp * 1000);
285 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
288 int index = to_sensor_dev_attr(attr)->index;
289 struct max6697_data *data = max6697_update_device(dev);
292 return PTR_ERR(data);
294 if (data->chip->alarm_map)
295 index = data->chip->alarm_map[index];
297 return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1);
300 static ssize_t set_temp(struct device *dev,
301 struct device_attribute *devattr,
302 const char *buf, size_t count)
304 int nr = to_sensor_dev_attr_2(devattr)->nr;
305 int index = to_sensor_dev_attr_2(devattr)->index;
306 struct i2c_client *client = to_i2c_client(dev);
307 struct max6697_data *data = i2c_get_clientdata(client);
311 ret = kstrtol(buf, 10, &temp);
315 mutex_lock(&data->update_lock);
316 temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset;
317 temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127);
318 data->temp[nr][index] = temp;
319 ret = i2c_smbus_write_byte_data(client,
320 index == 2 ? MAX6697_REG_MAX[nr]
321 : MAX6697_REG_CRIT[nr],
323 mutex_unlock(&data->update_lock);
325 return ret < 0 ? ret : count;
328 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0);
329 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
330 0, MAX6697_TEMP_MAX);
331 static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
332 0, MAX6697_TEMP_CRIT);
334 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1);
335 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
336 1, MAX6697_TEMP_MAX);
337 static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
338 1, MAX6697_TEMP_CRIT);
340 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2);
341 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
342 2, MAX6697_TEMP_MAX);
343 static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
344 2, MAX6697_TEMP_CRIT);
346 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3);
347 static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
348 3, MAX6697_TEMP_MAX);
349 static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
350 3, MAX6697_TEMP_CRIT);
352 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4);
353 static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
354 4, MAX6697_TEMP_MAX);
355 static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
356 4, MAX6697_TEMP_CRIT);
358 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5);
359 static SENSOR_DEVICE_ATTR_2(temp6_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
360 5, MAX6697_TEMP_MAX);
361 static SENSOR_DEVICE_ATTR_2(temp6_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
362 5, MAX6697_TEMP_CRIT);
364 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp_input, NULL, 6);
365 static SENSOR_DEVICE_ATTR_2(temp7_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
366 6, MAX6697_TEMP_MAX);
367 static SENSOR_DEVICE_ATTR_2(temp7_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
368 6, MAX6697_TEMP_CRIT);
370 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp_input, NULL, 7);
371 static SENSOR_DEVICE_ATTR_2(temp8_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
372 7, MAX6697_TEMP_MAX);
373 static SENSOR_DEVICE_ATTR_2(temp8_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
374 7, MAX6697_TEMP_CRIT);
376 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 22);
377 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 16);
378 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 17);
379 static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 18);
380 static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, 19);
381 static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO, show_alarm, NULL, 20);
382 static SENSOR_DEVICE_ATTR(temp7_max_alarm, S_IRUGO, show_alarm, NULL, 21);
383 static SENSOR_DEVICE_ATTR(temp8_max_alarm, S_IRUGO, show_alarm, NULL, 23);
385 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14);
386 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 8);
387 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
388 static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 10);
389 static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO, show_alarm, NULL, 11);
390 static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO, show_alarm, NULL, 12);
391 static SENSOR_DEVICE_ATTR(temp7_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
392 static SENSOR_DEVICE_ATTR(temp8_crit_alarm, S_IRUGO, show_alarm, NULL, 15);
394 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 1);
395 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
396 static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, 3);
397 static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_alarm, NULL, 4);
398 static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_alarm, NULL, 5);
399 static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_alarm, NULL, 6);
400 static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_alarm, NULL, 7);
402 static DEVICE_ATTR(dummy, 0, NULL, NULL);
404 static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr,
407 struct device *dev = container_of(kobj, struct device, kobj);
408 struct i2c_client *client = to_i2c_client(dev);
409 struct max6697_data *data = i2c_get_clientdata(client);
410 const struct max6697_chip_data *chip = data->chip;
411 int channel = index / 6; /* channel number */
412 int nr = index % 6; /* attribute index within channel */
414 if (channel >= chip->channels)
417 if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel)))
419 if (nr == 5 && !(chip->have_fault & (1 << channel)))
426 * max6697_is_visible uses the index into the following array to determine
427 * if attributes should be created or not. Any change in order or content
428 * must be matched in max6697_is_visible.
430 static struct attribute *max6697_attributes[] = {
431 &sensor_dev_attr_temp1_input.dev_attr.attr,
432 &sensor_dev_attr_temp1_max.dev_attr.attr,
433 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
434 &sensor_dev_attr_temp1_crit.dev_attr.attr,
435 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
436 &dev_attr_dummy.attr,
438 &sensor_dev_attr_temp2_input.dev_attr.attr,
439 &sensor_dev_attr_temp2_max.dev_attr.attr,
440 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
441 &sensor_dev_attr_temp2_crit.dev_attr.attr,
442 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
443 &sensor_dev_attr_temp2_fault.dev_attr.attr,
445 &sensor_dev_attr_temp3_input.dev_attr.attr,
446 &sensor_dev_attr_temp3_max.dev_attr.attr,
447 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
448 &sensor_dev_attr_temp3_crit.dev_attr.attr,
449 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
450 &sensor_dev_attr_temp3_fault.dev_attr.attr,
452 &sensor_dev_attr_temp4_input.dev_attr.attr,
453 &sensor_dev_attr_temp4_max.dev_attr.attr,
454 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
455 &sensor_dev_attr_temp4_crit.dev_attr.attr,
456 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
457 &sensor_dev_attr_temp4_fault.dev_attr.attr,
459 &sensor_dev_attr_temp5_input.dev_attr.attr,
460 &sensor_dev_attr_temp5_max.dev_attr.attr,
461 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
462 &sensor_dev_attr_temp5_crit.dev_attr.attr,
463 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
464 &sensor_dev_attr_temp5_fault.dev_attr.attr,
466 &sensor_dev_attr_temp6_input.dev_attr.attr,
467 &sensor_dev_attr_temp6_max.dev_attr.attr,
468 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
469 &sensor_dev_attr_temp6_crit.dev_attr.attr,
470 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
471 &sensor_dev_attr_temp6_fault.dev_attr.attr,
473 &sensor_dev_attr_temp7_input.dev_attr.attr,
474 &sensor_dev_attr_temp7_max.dev_attr.attr,
475 &sensor_dev_attr_temp7_max_alarm.dev_attr.attr,
476 &sensor_dev_attr_temp7_crit.dev_attr.attr,
477 &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr,
478 &sensor_dev_attr_temp7_fault.dev_attr.attr,
480 &sensor_dev_attr_temp8_input.dev_attr.attr,
481 &sensor_dev_attr_temp8_max.dev_attr.attr,
482 &sensor_dev_attr_temp8_max_alarm.dev_attr.attr,
483 &sensor_dev_attr_temp8_crit.dev_attr.attr,
484 &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr,
485 &sensor_dev_attr_temp8_fault.dev_attr.attr,
489 static const struct attribute_group max6697_group = {
490 .attrs = max6697_attributes, .is_visible = max6697_is_visible,
493 static void max6697_get_config_of(struct device_node *node,
494 struct max6697_platform_data *pdata)
499 prop = of_get_property(node, "smbus-timeout-disable", &len);
501 pdata->smbus_timeout_disable = true;
502 prop = of_get_property(node, "extended-range-enable", &len);
504 pdata->extended_range_enable = true;
505 prop = of_get_property(node, "beta-compensation-enable", &len);
507 pdata->beta_compensation = true;
508 prop = of_get_property(node, "alert-mask", &len);
509 if (prop && len == sizeof(u32))
510 pdata->alert_mask = be32_to_cpu(prop[0]);
511 prop = of_get_property(node, "over-temperature-mask", &len);
512 if (prop && len == sizeof(u32))
513 pdata->over_temperature_mask = be32_to_cpu(prop[0]);
514 prop = of_get_property(node, "resistance-cancellation", &len);
516 if (len == sizeof(u32))
517 pdata->resistance_cancellation = be32_to_cpu(prop[0]);
519 pdata->resistance_cancellation = 0xfe;
521 prop = of_get_property(node, "transistor-ideality", &len);
522 if (prop && len == 2 * sizeof(u32)) {
523 pdata->ideality_mask = be32_to_cpu(prop[0]);
524 pdata->ideality_value = be32_to_cpu(prop[1]);
528 static int max6697_init_chip(struct i2c_client *client)
530 struct max6697_data *data = i2c_get_clientdata(client);
531 struct max6697_platform_data *pdata = dev_get_platdata(&client->dev);
532 struct max6697_platform_data p;
533 const struct max6697_chip_data *chip = data->chip;
534 int factor = chip->channels;
538 * Don't touch configuration if neither platform data nor OF
539 * configuration was specified. If that is the case, use the
540 * current chip configuration.
542 if (!pdata && !client->dev.of_node) {
543 reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG);
546 if (data->type == max6581) {
547 if (reg & MAX6581_CONF_EXTENDED)
548 data->temp_offset = 64;
549 reg = i2c_smbus_read_byte_data(client,
550 MAX6581_REG_RESISTANCE);
553 factor += hweight8(reg);
555 if (reg & MAX6697_CONF_RESISTANCE)
561 if (client->dev.of_node) {
562 memset(&p, 0, sizeof(p));
563 max6697_get_config_of(client->dev.of_node, &p);
568 if (pdata->smbus_timeout_disable &&
569 (chip->valid_conf & MAX6697_CONF_TIMEOUT)) {
570 reg |= MAX6697_CONF_TIMEOUT;
572 if (pdata->extended_range_enable &&
573 (chip->valid_conf & MAX6581_CONF_EXTENDED)) {
574 reg |= MAX6581_CONF_EXTENDED;
575 data->temp_offset = 64;
577 if (pdata->resistance_cancellation &&
578 (chip->valid_conf & MAX6697_CONF_RESISTANCE)) {
579 reg |= MAX6697_CONF_RESISTANCE;
582 if (pdata->beta_compensation &&
583 (chip->valid_conf & MAX6693_CONF_BETA)) {
584 reg |= MAX6693_CONF_BETA;
587 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg);
591 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK,
592 MAX6697_MAP_BITS(pdata->alert_mask));
596 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK,
597 MAX6697_MAP_BITS(pdata->over_temperature_mask));
601 if (data->type == max6581) {
602 factor += hweight8(pdata->resistance_cancellation >> 1);
603 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE,
604 pdata->resistance_cancellation >> 1);
607 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY,
608 pdata->ideality_value);
611 ret = i2c_smbus_write_byte_data(client,
612 MAX6581_REG_IDEALITY_SELECT,
613 pdata->ideality_mask >> 1);
618 data->update_interval = factor * MAX6697_CONV_TIME;
622 static int max6697_probe(struct i2c_client *client,
623 const struct i2c_device_id *id)
625 struct i2c_adapter *adapter = client->adapter;
626 struct device *dev = &client->dev;
627 struct max6697_data *data;
630 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
633 data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL);
637 data->type = id->driver_data;
638 data->chip = &max6697_chip_data[data->type];
640 i2c_set_clientdata(client, data);
641 mutex_init(&data->update_lock);
643 err = max6697_init_chip(client);
647 err = sysfs_create_group(&client->dev.kobj, &max6697_group);
651 data->hwmon_dev = hwmon_device_register(dev);
652 if (IS_ERR(data->hwmon_dev)) {
653 err = PTR_ERR(data->hwmon_dev);
660 sysfs_remove_group(&client->dev.kobj, &max6697_group);
664 static int max6697_remove(struct i2c_client *client)
666 struct max6697_data *data = i2c_get_clientdata(client);
668 hwmon_device_unregister(data->hwmon_dev);
669 sysfs_remove_group(&client->dev.kobj, &max6697_group);
674 static const struct i2c_device_id max6697_id[] = {
675 { "max6581", max6581 },
676 { "max6602", max6602 },
677 { "max6622", max6622 },
678 { "max6636", max6636 },
679 { "max6689", max6689 },
680 { "max6693", max6693 },
681 { "max6694", max6694 },
682 { "max6697", max6697 },
683 { "max6698", max6698 },
684 { "max6699", max6699 },
687 MODULE_DEVICE_TABLE(i2c, max6697_id);
689 static struct i2c_driver max6697_driver = {
690 .class = I2C_CLASS_HWMON,
694 .probe = max6697_probe,
695 .remove = max6697_remove,
696 .id_table = max6697_id,
699 module_i2c_driver(max6697_driver);
701 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
702 MODULE_DESCRIPTION("MAX6697 temperature sensor driver");
703 MODULE_LICENSE("GPL");