3 * Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com>
4 * Preliminary tmp411 support by:
5 * Gabriel Konat, Sander Leget, Wouter Willems
6 * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de>
8 * Cleanup and support for TMP431 and TMP432 by Guenter Roeck
9 * Copyright (c) 2013 Guenter Roeck <linux@roeck-us.net>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
29 * Note this IC is in some aspect similar to the LM90, but it has quite a
30 * few differences too, for example the local temp has a higher resolution
31 * and thus has 16 bits registers for its value and limit instead of 8 bits.
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/bitops.h>
37 #include <linux/slab.h>
38 #include <linux/jiffies.h>
39 #include <linux/i2c.h>
40 #include <linux/hwmon.h>
41 #include <linux/hwmon-sysfs.h>
42 #include <linux/err.h>
43 #include <linux/mutex.h>
44 #include <linux/sysfs.h>
46 /* Addresses to scan */
47 static const unsigned short normal_i2c[] = { 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
49 enum chips { tmp401, tmp411, tmp431, tmp432, tmp435 };
52 * The TMP401 registers, note some registers have different addresses for
55 #define TMP401_STATUS 0x02
56 #define TMP401_CONFIG_READ 0x03
57 #define TMP401_CONFIG_WRITE 0x09
58 #define TMP401_CONVERSION_RATE_READ 0x04
59 #define TMP401_CONVERSION_RATE_WRITE 0x0A
60 #define TMP401_TEMP_CRIT_HYST 0x21
61 #define TMP401_MANUFACTURER_ID_REG 0xFE
62 #define TMP401_DEVICE_ID_REG 0xFF
64 static const u8 TMP401_TEMP_MSB_READ[6][2] = {
65 { 0x00, 0x01 }, /* temp */
66 { 0x06, 0x08 }, /* low limit */
67 { 0x05, 0x07 }, /* high limit */
68 { 0x20, 0x19 }, /* therm (crit) limit */
69 { 0x30, 0x34 }, /* lowest */
70 { 0x32, 0x36 }, /* highest */
73 static const u8 TMP401_TEMP_MSB_WRITE[6][2] = {
74 { 0, 0 }, /* temp (unused) */
75 { 0x0C, 0x0E }, /* low limit */
76 { 0x0B, 0x0D }, /* high limit */
77 { 0x20, 0x19 }, /* therm (crit) limit */
78 { 0x30, 0x34 }, /* lowest */
79 { 0x32, 0x36 }, /* highest */
82 static const u8 TMP401_TEMP_LSB[6][2] = {
83 { 0x15, 0x10 }, /* temp */
84 { 0x17, 0x14 }, /* low limit */
85 { 0x16, 0x13 }, /* high limit */
86 { 0, 0 }, /* therm (crit) limit (unused) */
87 { 0x31, 0x35 }, /* lowest */
88 { 0x33, 0x37 }, /* highest */
91 static const u8 TMP432_TEMP_MSB_READ[4][3] = {
92 { 0x00, 0x01, 0x23 }, /* temp */
93 { 0x06, 0x08, 0x16 }, /* low limit */
94 { 0x05, 0x07, 0x15 }, /* high limit */
95 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
98 static const u8 TMP432_TEMP_MSB_WRITE[4][3] = {
99 { 0, 0, 0 }, /* temp - unused */
100 { 0x0C, 0x0E, 0x16 }, /* low limit */
101 { 0x0B, 0x0D, 0x15 }, /* high limit */
102 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
105 static const u8 TMP432_TEMP_LSB[3][3] = {
106 { 0x29, 0x10, 0x24 }, /* temp */
107 { 0x3E, 0x14, 0x18 }, /* low limit */
108 { 0x3D, 0x13, 0x17 }, /* high limit */
111 /* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
112 static const u8 TMP432_STATUS_REG[] = {
113 0x1b, 0x36, 0x35, 0x37 };
116 #define TMP401_CONFIG_RANGE BIT(2)
117 #define TMP401_CONFIG_SHUTDOWN BIT(6)
118 #define TMP401_STATUS_LOCAL_CRIT BIT(0)
119 #define TMP401_STATUS_REMOTE_CRIT BIT(1)
120 #define TMP401_STATUS_REMOTE_OPEN BIT(2)
121 #define TMP401_STATUS_REMOTE_LOW BIT(3)
122 #define TMP401_STATUS_REMOTE_HIGH BIT(4)
123 #define TMP401_STATUS_LOCAL_LOW BIT(5)
124 #define TMP401_STATUS_LOCAL_HIGH BIT(6)
126 /* On TMP432, each status has its own register */
127 #define TMP432_STATUS_LOCAL BIT(0)
128 #define TMP432_STATUS_REMOTE1 BIT(1)
129 #define TMP432_STATUS_REMOTE2 BIT(2)
131 /* Manufacturer / Device ID's */
132 #define TMP401_MANUFACTURER_ID 0x55
133 #define TMP401_DEVICE_ID 0x11
134 #define TMP411A_DEVICE_ID 0x12
135 #define TMP411B_DEVICE_ID 0x13
136 #define TMP411C_DEVICE_ID 0x10
137 #define TMP431_DEVICE_ID 0x31
138 #define TMP432_DEVICE_ID 0x32
139 #define TMP435_DEVICE_ID 0x35
142 * Driver data (common to all clients)
145 static const struct i2c_device_id tmp401_id[] = {
146 { "tmp401", tmp401 },
147 { "tmp411", tmp411 },
148 { "tmp431", tmp431 },
149 { "tmp432", tmp432 },
150 { "tmp435", tmp435 },
153 MODULE_DEVICE_TABLE(i2c, tmp401_id);
156 * Client data (each client gets its own)
160 struct i2c_client *client;
161 const struct attribute_group *groups[3];
162 struct mutex update_lock;
163 char valid; /* zero until following fields are valid */
164 unsigned long last_updated; /* in jiffies */
167 unsigned int update_interval; /* in milliseconds */
169 /* register values */
177 * Sysfs attr show / store functions
180 static int tmp401_register_to_temp(u16 reg, u8 config)
184 if (config & TMP401_CONFIG_RANGE)
187 return DIV_ROUND_CLOSEST(temp * 125, 32);
190 static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
192 if (config & TMP401_CONFIG_RANGE) {
193 temp = clamp_val(temp, -64000, 191000);
196 temp = clamp_val(temp, 0, 127000);
198 return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
201 static int tmp401_update_device_reg16(struct i2c_client *client,
202 struct tmp401_data *data)
205 int num_regs = data->kind == tmp411 ? 6 : 4;
206 int num_sensors = data->kind == tmp432 ? 3 : 2;
208 for (i = 0; i < num_sensors; i++) { /* local / r1 / r2 */
209 for (j = 0; j < num_regs; j++) { /* temp / low / ... */
212 * High byte must be read first immediately followed
215 regaddr = data->kind == tmp432 ?
216 TMP432_TEMP_MSB_READ[j][i] :
217 TMP401_TEMP_MSB_READ[j][i];
218 val = i2c_smbus_read_byte_data(client, regaddr);
221 data->temp[j][i] = val << 8;
222 if (j == 3) /* crit is msb only */
224 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[j][i]
225 : TMP401_TEMP_LSB[j][i];
226 val = i2c_smbus_read_byte_data(client, regaddr);
229 data->temp[j][i] |= val;
235 static struct tmp401_data *tmp401_update_device(struct device *dev)
237 struct tmp401_data *data = dev_get_drvdata(dev);
238 struct i2c_client *client = data->client;
239 struct tmp401_data *ret = data;
241 unsigned long next_update;
243 mutex_lock(&data->update_lock);
245 next_update = data->last_updated +
246 msecs_to_jiffies(data->update_interval);
247 if (time_after(jiffies, next_update) || !data->valid) {
248 if (data->kind != tmp432) {
250 * The driver uses the TMP432 status format internally.
251 * Convert status to TMP432 format for other chips.
253 val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
259 (val & TMP401_STATUS_REMOTE_OPEN) >> 1;
261 ((val & TMP401_STATUS_REMOTE_LOW) >> 2) |
262 ((val & TMP401_STATUS_LOCAL_LOW) >> 5);
264 ((val & TMP401_STATUS_REMOTE_HIGH) >> 3) |
265 ((val & TMP401_STATUS_LOCAL_HIGH) >> 6);
266 data->status[3] = val & (TMP401_STATUS_LOCAL_CRIT
267 | TMP401_STATUS_REMOTE_CRIT);
269 for (i = 0; i < ARRAY_SIZE(data->status); i++) {
270 val = i2c_smbus_read_byte_data(client,
271 TMP432_STATUS_REG[i]);
276 data->status[i] = val;
280 val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
286 val = tmp401_update_device_reg16(client, data);
291 val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
296 data->temp_crit_hyst = val;
298 data->last_updated = jiffies;
303 mutex_unlock(&data->update_lock);
307 static ssize_t show_temp(struct device *dev,
308 struct device_attribute *devattr, char *buf)
310 int nr = to_sensor_dev_attr_2(devattr)->nr;
311 int index = to_sensor_dev_attr_2(devattr)->index;
312 struct tmp401_data *data = tmp401_update_device(dev);
315 return PTR_ERR(data);
317 return sprintf(buf, "%d\n",
318 tmp401_register_to_temp(data->temp[nr][index], data->config));
321 static ssize_t show_temp_crit_hyst(struct device *dev,
322 struct device_attribute *devattr, char *buf)
324 int temp, index = to_sensor_dev_attr(devattr)->index;
325 struct tmp401_data *data = tmp401_update_device(dev);
328 return PTR_ERR(data);
330 mutex_lock(&data->update_lock);
331 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
332 temp -= data->temp_crit_hyst * 1000;
333 mutex_unlock(&data->update_lock);
335 return sprintf(buf, "%d\n", temp);
338 static ssize_t show_status(struct device *dev,
339 struct device_attribute *devattr, char *buf)
341 int nr = to_sensor_dev_attr_2(devattr)->nr;
342 int mask = to_sensor_dev_attr_2(devattr)->index;
343 struct tmp401_data *data = tmp401_update_device(dev);
346 return PTR_ERR(data);
348 return sprintf(buf, "%d\n", !!(data->status[nr] & mask));
351 static ssize_t store_temp(struct device *dev, struct device_attribute *devattr,
352 const char *buf, size_t count)
354 int nr = to_sensor_dev_attr_2(devattr)->nr;
355 int index = to_sensor_dev_attr_2(devattr)->index;
356 struct tmp401_data *data = dev_get_drvdata(dev);
357 struct i2c_client *client = data->client;
362 if (kstrtol(buf, 10, &val))
365 reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
367 mutex_lock(&data->update_lock);
369 regaddr = data->kind == tmp432 ? TMP432_TEMP_MSB_WRITE[nr][index]
370 : TMP401_TEMP_MSB_WRITE[nr][index];
371 i2c_smbus_write_byte_data(client, regaddr, reg >> 8);
373 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[nr][index]
374 : TMP401_TEMP_LSB[nr][index];
375 i2c_smbus_write_byte_data(client, regaddr, reg & 0xFF);
377 data->temp[nr][index] = reg;
379 mutex_unlock(&data->update_lock);
384 static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
385 *devattr, const char *buf, size_t count)
387 int temp, index = to_sensor_dev_attr(devattr)->index;
388 struct tmp401_data *data = tmp401_update_device(dev);
393 return PTR_ERR(data);
395 if (kstrtol(buf, 10, &val))
398 if (data->config & TMP401_CONFIG_RANGE)
399 val = clamp_val(val, -64000, 191000);
401 val = clamp_val(val, 0, 127000);
403 mutex_lock(&data->update_lock);
404 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
405 val = clamp_val(val, temp - 255000, temp);
406 reg = ((temp - val) + 500) / 1000;
408 i2c_smbus_write_byte_data(data->client, TMP401_TEMP_CRIT_HYST,
411 data->temp_crit_hyst = reg;
413 mutex_unlock(&data->update_lock);
419 * Resets the historical measurements of minimum and maximum temperatures.
420 * This is done by writing any value to any of the minimum/maximum registers
423 static ssize_t reset_temp_history(struct device *dev,
424 struct device_attribute *devattr, const char *buf, size_t count)
426 struct tmp401_data *data = dev_get_drvdata(dev);
427 struct i2c_client *client = data->client;
430 if (kstrtol(buf, 10, &val))
435 "temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
439 mutex_lock(&data->update_lock);
440 i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
442 mutex_unlock(&data->update_lock);
447 static ssize_t show_update_interval(struct device *dev,
448 struct device_attribute *attr, char *buf)
450 struct tmp401_data *data = dev_get_drvdata(dev);
452 return sprintf(buf, "%u\n", data->update_interval);
455 static ssize_t set_update_interval(struct device *dev,
456 struct device_attribute *attr,
457 const char *buf, size_t count)
459 struct tmp401_data *data = dev_get_drvdata(dev);
460 struct i2c_client *client = data->client;
464 err = kstrtoul(buf, 10, &val);
469 * For valid rates, interval can be calculated as
470 * interval = (1 << (7 - rate)) * 125;
471 * Rounded rate is therefore
472 * rate = 7 - __fls(interval * 4 / (125 * 3));
473 * Use clamp_val() to avoid overflows, and to ensure valid input
476 val = clamp_val(val, 125, 16000);
477 rate = 7 - __fls(val * 4 / (125 * 3));
478 mutex_lock(&data->update_lock);
479 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, rate);
480 data->update_interval = (1 << (7 - rate)) * 125;
481 mutex_unlock(&data->update_lock);
486 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
487 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IWUSR | S_IRUGO, show_temp,
489 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IWUSR | S_IRUGO, show_temp,
491 static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
493 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
494 show_temp_crit_hyst, store_temp_crit_hyst, 0);
495 static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_status, NULL,
496 1, TMP432_STATUS_LOCAL);
497 static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_status, NULL,
498 2, TMP432_STATUS_LOCAL);
499 static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_status, NULL,
500 3, TMP432_STATUS_LOCAL);
501 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1);
502 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp,
504 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp,
506 static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IWUSR | S_IRUGO, show_temp,
508 static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst,
510 static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_status, NULL,
511 0, TMP432_STATUS_REMOTE1);
512 static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_status, NULL,
513 1, TMP432_STATUS_REMOTE1);
514 static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_status, NULL,
515 2, TMP432_STATUS_REMOTE1);
516 static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_status, NULL,
517 3, TMP432_STATUS_REMOTE1);
519 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
520 set_update_interval);
522 static struct attribute *tmp401_attributes[] = {
523 &sensor_dev_attr_temp1_input.dev_attr.attr,
524 &sensor_dev_attr_temp1_min.dev_attr.attr,
525 &sensor_dev_attr_temp1_max.dev_attr.attr,
526 &sensor_dev_attr_temp1_crit.dev_attr.attr,
527 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
528 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
529 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
530 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
532 &sensor_dev_attr_temp2_input.dev_attr.attr,
533 &sensor_dev_attr_temp2_min.dev_attr.attr,
534 &sensor_dev_attr_temp2_max.dev_attr.attr,
535 &sensor_dev_attr_temp2_crit.dev_attr.attr,
536 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
537 &sensor_dev_attr_temp2_fault.dev_attr.attr,
538 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
539 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
540 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
542 &dev_attr_update_interval.attr,
547 static const struct attribute_group tmp401_group = {
548 .attrs = tmp401_attributes,
552 * Additional features of the TMP411 chip.
553 * The TMP411 stores the minimum and maximum
554 * temperature measured since power-on, chip-reset, or
555 * minimum and maximum register reset for both the local
556 * and remote channels.
558 static SENSOR_DEVICE_ATTR_2(temp1_lowest, S_IRUGO, show_temp, NULL, 4, 0);
559 static SENSOR_DEVICE_ATTR_2(temp1_highest, S_IRUGO, show_temp, NULL, 5, 0);
560 static SENSOR_DEVICE_ATTR_2(temp2_lowest, S_IRUGO, show_temp, NULL, 4, 1);
561 static SENSOR_DEVICE_ATTR_2(temp2_highest, S_IRUGO, show_temp, NULL, 5, 1);
562 static SENSOR_DEVICE_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history,
565 static struct attribute *tmp411_attributes[] = {
566 &sensor_dev_attr_temp1_highest.dev_attr.attr,
567 &sensor_dev_attr_temp1_lowest.dev_attr.attr,
568 &sensor_dev_attr_temp2_highest.dev_attr.attr,
569 &sensor_dev_attr_temp2_lowest.dev_attr.attr,
570 &sensor_dev_attr_temp_reset_history.dev_attr.attr,
574 static const struct attribute_group tmp411_group = {
575 .attrs = tmp411_attributes,
578 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0, 2);
579 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp,
581 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp,
583 static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IWUSR | S_IRUGO, show_temp,
585 static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temp_crit_hyst,
587 static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_status, NULL,
588 0, TMP432_STATUS_REMOTE2);
589 static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_status, NULL,
590 1, TMP432_STATUS_REMOTE2);
591 static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_status, NULL,
592 2, TMP432_STATUS_REMOTE2);
593 static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_status, NULL,
594 3, TMP432_STATUS_REMOTE2);
596 static struct attribute *tmp432_attributes[] = {
597 &sensor_dev_attr_temp3_input.dev_attr.attr,
598 &sensor_dev_attr_temp3_min.dev_attr.attr,
599 &sensor_dev_attr_temp3_max.dev_attr.attr,
600 &sensor_dev_attr_temp3_crit.dev_attr.attr,
601 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
602 &sensor_dev_attr_temp3_fault.dev_attr.attr,
603 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
604 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
605 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
610 static const struct attribute_group tmp432_group = {
611 .attrs = tmp432_attributes,
615 * Begin non sysfs callback code (aka Real code)
618 static int tmp401_init_client(struct tmp401_data *data,
619 struct i2c_client *client)
621 int config, config_orig, status = 0;
623 /* Set the conversion rate to 2 Hz */
624 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
625 data->update_interval = 500;
627 /* Start conversions (disable shutdown if necessary) */
628 config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
632 config_orig = config;
633 config &= ~TMP401_CONFIG_SHUTDOWN;
635 if (config != config_orig)
636 status = i2c_smbus_write_byte_data(client,
643 static int tmp401_detect(struct i2c_client *client,
644 struct i2c_board_info *info)
647 struct i2c_adapter *adapter = client->adapter;
650 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
653 /* Detect and identify the chip */
654 reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
655 if (reg != TMP401_MANUFACTURER_ID)
658 reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
661 case TMP401_DEVICE_ID:
662 if (client->addr != 0x4c)
666 case TMP411A_DEVICE_ID:
667 if (client->addr != 0x4c)
671 case TMP411B_DEVICE_ID:
672 if (client->addr != 0x4d)
676 case TMP411C_DEVICE_ID:
677 if (client->addr != 0x4e)
681 case TMP431_DEVICE_ID:
682 if (client->addr == 0x4e)
686 case TMP432_DEVICE_ID:
687 if (client->addr == 0x4e)
691 case TMP435_DEVICE_ID:
692 if (client->addr != 0x4c)
700 reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
704 reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
705 /* Datasheet says: 0x1-0x6 */
709 strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
714 static int tmp401_probe(struct i2c_client *client,
715 const struct i2c_device_id *id)
717 static const char * const names[] = {
718 "TMP401", "TMP411", "TMP431", "TMP432", "TMP435"
720 struct device *dev = &client->dev;
721 struct device *hwmon_dev;
722 struct tmp401_data *data;
723 int groups = 0, status;
725 data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
729 data->client = client;
730 mutex_init(&data->update_lock);
731 data->kind = id->driver_data;
733 /* Initialize the TMP401 chip */
734 status = tmp401_init_client(data, client);
738 /* Register sysfs hooks */
739 data->groups[groups++] = &tmp401_group;
741 /* Register additional tmp411 sysfs hooks */
742 if (data->kind == tmp411)
743 data->groups[groups++] = &tmp411_group;
745 /* Register additional tmp432 sysfs hooks */
746 if (data->kind == tmp432)
747 data->groups[groups++] = &tmp432_group;
749 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
751 if (IS_ERR(hwmon_dev))
752 return PTR_ERR(hwmon_dev);
754 dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
759 static struct i2c_driver tmp401_driver = {
760 .class = I2C_CLASS_HWMON,
764 .probe = tmp401_probe,
765 .id_table = tmp401_id,
766 .detect = tmp401_detect,
767 .address_list = normal_i2c,
770 module_i2c_driver(tmp401_driver);
772 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
773 MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
774 MODULE_LICENSE("GPL");