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1/* tmp401.c
2 *
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>
7 *
8 * Cleanup and support for TMP431 and TMP432 by Guenter Roeck
9 * Copyright (c) 2013 Guenter Roeck <linux@roeck-us.net>
10 *
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.
15 *
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.
20 *
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.
24 */
25
26/*
27 * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
28 *
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.
32 */
33
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>
45
46/* Addresses to scan */
47static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4c, 0x4d,
48 0x4e, 0x4f, I2C_CLIENT_END };
49
50enum chips { tmp401, tmp411, tmp431, tmp432, tmp435 };
51
52/*
53 * The TMP401 registers, note some registers have different addresses for
54 * reading and writing
55 */
56#define TMP401_STATUS 0x02
57#define TMP401_CONFIG_READ 0x03
58#define TMP401_CONFIG_WRITE 0x09
59#define TMP401_CONVERSION_RATE_READ 0x04
60#define TMP401_CONVERSION_RATE_WRITE 0x0A
61#define TMP401_TEMP_CRIT_HYST 0x21
62#define TMP401_MANUFACTURER_ID_REG 0xFE
63#define TMP401_DEVICE_ID_REG 0xFF
64
65static const u8 TMP401_TEMP_MSB_READ[6][2] = {
66 { 0x00, 0x01 }, /* temp */
67 { 0x06, 0x08 }, /* low limit */
68 { 0x05, 0x07 }, /* high limit */
69 { 0x20, 0x19 }, /* therm (crit) limit */
70 { 0x30, 0x34 }, /* lowest */
71 { 0x32, 0x36 }, /* highest */
72};
73
74static const u8 TMP401_TEMP_MSB_WRITE[6][2] = {
75 { 0, 0 }, /* temp (unused) */
76 { 0x0C, 0x0E }, /* low limit */
77 { 0x0B, 0x0D }, /* high limit */
78 { 0x20, 0x19 }, /* therm (crit) limit */
79 { 0x30, 0x34 }, /* lowest */
80 { 0x32, 0x36 }, /* highest */
81};
82
83static const u8 TMP401_TEMP_LSB[6][2] = {
84 { 0x15, 0x10 }, /* temp */
85 { 0x17, 0x14 }, /* low limit */
86 { 0x16, 0x13 }, /* high limit */
87 { 0, 0 }, /* therm (crit) limit (unused) */
88 { 0x31, 0x35 }, /* lowest */
89 { 0x33, 0x37 }, /* highest */
90};
91
92static const u8 TMP432_TEMP_MSB_READ[4][3] = {
93 { 0x00, 0x01, 0x23 }, /* temp */
94 { 0x06, 0x08, 0x16 }, /* low limit */
95 { 0x05, 0x07, 0x15 }, /* high limit */
96 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
97};
98
99static const u8 TMP432_TEMP_MSB_WRITE[4][3] = {
100 { 0, 0, 0 }, /* temp - unused */
101 { 0x0C, 0x0E, 0x16 }, /* low limit */
102 { 0x0B, 0x0D, 0x15 }, /* high limit */
103 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
104};
105
106static const u8 TMP432_TEMP_LSB[3][3] = {
107 { 0x29, 0x10, 0x24 }, /* temp */
108 { 0x3E, 0x14, 0x18 }, /* low limit */
109 { 0x3D, 0x13, 0x17 }, /* high limit */
110};
111
112/* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
113static const u8 TMP432_STATUS_REG[] = {
114 0x1b, 0x36, 0x35, 0x37 };
115
116/* Flags */
117#define TMP401_CONFIG_RANGE BIT(2)
118#define TMP401_CONFIG_SHUTDOWN BIT(6)
119#define TMP401_STATUS_LOCAL_CRIT BIT(0)
120#define TMP401_STATUS_REMOTE_CRIT BIT(1)
121#define TMP401_STATUS_REMOTE_OPEN BIT(2)
122#define TMP401_STATUS_REMOTE_LOW BIT(3)
123#define TMP401_STATUS_REMOTE_HIGH BIT(4)
124#define TMP401_STATUS_LOCAL_LOW BIT(5)
125#define TMP401_STATUS_LOCAL_HIGH BIT(6)
126
127/* On TMP432, each status has its own register */
128#define TMP432_STATUS_LOCAL BIT(0)
129#define TMP432_STATUS_REMOTE1 BIT(1)
130#define TMP432_STATUS_REMOTE2 BIT(2)
131
132/* Manufacturer / Device ID's */
133#define TMP401_MANUFACTURER_ID 0x55
134#define TMP401_DEVICE_ID 0x11
135#define TMP411A_DEVICE_ID 0x12
136#define TMP411B_DEVICE_ID 0x13
137#define TMP411C_DEVICE_ID 0x10
138#define TMP431_DEVICE_ID 0x31
139#define TMP432_DEVICE_ID 0x32
140#define TMP435_DEVICE_ID 0x35
141
142/*
143 * Driver data (common to all clients)
144 */
145
146static const struct i2c_device_id tmp401_id[] = {
147 { "tmp401", tmp401 },
148 { "tmp411", tmp411 },
149 { "tmp431", tmp431 },
150 { "tmp432", tmp432 },
151 { "tmp435", tmp435 },
152 { }
153};
154MODULE_DEVICE_TABLE(i2c, tmp401_id);
155
156/*
157 * Client data (each client gets its own)
158 */
159
160struct tmp401_data {
161 struct i2c_client *client;
162 const struct attribute_group *groups[3];
163 struct mutex update_lock;
164 char valid; /* zero until following fields are valid */
165 unsigned long last_updated; /* in jiffies */
166 enum chips kind;
167
168 unsigned int update_interval; /* in milliseconds */
169
170 /* register values */
171 u8 status[4];
172 u8 config;
173 u16 temp[6][3];
174 u8 temp_crit_hyst;
175};
176
177/*
178 * Sysfs attr show / store functions
179 */
180
181static int tmp401_register_to_temp(u16 reg, u8 config)
182{
183 int temp = reg;
184
185 if (config & TMP401_CONFIG_RANGE)
186 temp -= 64 * 256;
187
188 return DIV_ROUND_CLOSEST(temp * 125, 32);
189}
190
191static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
192{
193 if (config & TMP401_CONFIG_RANGE) {
194 temp = clamp_val(temp, -64000, 191000);
195 temp += 64000;
196 } else
197 temp = clamp_val(temp, 0, 127000);
198
199 return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
200}
201
202static int tmp401_update_device_reg16(struct i2c_client *client,
203 struct tmp401_data *data)
204{
205 int i, j, val;
206 int num_regs = data->kind == tmp411 ? 6 : 4;
207 int num_sensors = data->kind == tmp432 ? 3 : 2;
208
209 for (i = 0; i < num_sensors; i++) { /* local / r1 / r2 */
210 for (j = 0; j < num_regs; j++) { /* temp / low / ... */
211 u8 regaddr;
212 /*
213 * High byte must be read first immediately followed
214 * by the low byte
215 */
216 regaddr = data->kind == tmp432 ?
217 TMP432_TEMP_MSB_READ[j][i] :
218 TMP401_TEMP_MSB_READ[j][i];
219 val = i2c_smbus_read_byte_data(client, regaddr);
220 if (val < 0)
221 return val;
222 data->temp[j][i] = val << 8;
223 if (j == 3) /* crit is msb only */
224 continue;
225 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[j][i]
226 : TMP401_TEMP_LSB[j][i];
227 val = i2c_smbus_read_byte_data(client, regaddr);
228 if (val < 0)
229 return val;
230 data->temp[j][i] |= val;
231 }
232 }
233 return 0;
234}
235
236static struct tmp401_data *tmp401_update_device(struct device *dev)
237{
238 struct tmp401_data *data = dev_get_drvdata(dev);
239 struct i2c_client *client = data->client;
240 struct tmp401_data *ret = data;
241 int i, val;
242 unsigned long next_update;
243
244 mutex_lock(&data->update_lock);
245
246 next_update = data->last_updated +
247 msecs_to_jiffies(data->update_interval);
248 if (time_after(jiffies, next_update) || !data->valid) {
249 if (data->kind != tmp432) {
250 /*
251 * The driver uses the TMP432 status format internally.
252 * Convert status to TMP432 format for other chips.
253 */
254 val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
255 if (val < 0) {
256 ret = ERR_PTR(val);
257 goto abort;
258 }
259 data->status[0] =
260 (val & TMP401_STATUS_REMOTE_OPEN) >> 1;
261 data->status[1] =
262 ((val & TMP401_STATUS_REMOTE_LOW) >> 2) |
263 ((val & TMP401_STATUS_LOCAL_LOW) >> 5);
264 data->status[2] =
265 ((val & TMP401_STATUS_REMOTE_HIGH) >> 3) |
266 ((val & TMP401_STATUS_LOCAL_HIGH) >> 6);
267 data->status[3] = val & (TMP401_STATUS_LOCAL_CRIT
268 | TMP401_STATUS_REMOTE_CRIT);
269 } else {
270 for (i = 0; i < ARRAY_SIZE(data->status); i++) {
271 val = i2c_smbus_read_byte_data(client,
272 TMP432_STATUS_REG[i]);
273 if (val < 0) {
274 ret = ERR_PTR(val);
275 goto abort;
276 }
277 data->status[i] = val;
278 }
279 }
280
281 val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
282 if (val < 0) {
283 ret = ERR_PTR(val);
284 goto abort;
285 }
286 data->config = val;
287 val = tmp401_update_device_reg16(client, data);
288 if (val < 0) {
289 ret = ERR_PTR(val);
290 goto abort;
291 }
292 val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
293 if (val < 0) {
294 ret = ERR_PTR(val);
295 goto abort;
296 }
297 data->temp_crit_hyst = val;
298
299 data->last_updated = jiffies;
300 data->valid = 1;
301 }
302
303abort:
304 mutex_unlock(&data->update_lock);
305 return ret;
306}
307
308static ssize_t show_temp(struct device *dev,
309 struct device_attribute *devattr, char *buf)
310{
311 int nr = to_sensor_dev_attr_2(devattr)->nr;
312 int index = to_sensor_dev_attr_2(devattr)->index;
313 struct tmp401_data *data = tmp401_update_device(dev);
314
315 if (IS_ERR(data))
316 return PTR_ERR(data);
317
318 return sprintf(buf, "%d\n",
319 tmp401_register_to_temp(data->temp[nr][index], data->config));
320}
321
322static ssize_t show_temp_crit_hyst(struct device *dev,
323 struct device_attribute *devattr, char *buf)
324{
325 int temp, index = to_sensor_dev_attr(devattr)->index;
326 struct tmp401_data *data = tmp401_update_device(dev);
327
328 if (IS_ERR(data))
329 return PTR_ERR(data);
330
331 mutex_lock(&data->update_lock);
332 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
333 temp -= data->temp_crit_hyst * 1000;
334 mutex_unlock(&data->update_lock);
335
336 return sprintf(buf, "%d\n", temp);
337}
338
339static ssize_t show_status(struct device *dev,
340 struct device_attribute *devattr, char *buf)
341{
342 int nr = to_sensor_dev_attr_2(devattr)->nr;
343 int mask = to_sensor_dev_attr_2(devattr)->index;
344 struct tmp401_data *data = tmp401_update_device(dev);
345
346 if (IS_ERR(data))
347 return PTR_ERR(data);
348
349 return sprintf(buf, "%d\n", !!(data->status[nr] & mask));
350}
351
352static ssize_t store_temp(struct device *dev, struct device_attribute *devattr,
353 const char *buf, size_t count)
354{
355 int nr = to_sensor_dev_attr_2(devattr)->nr;
356 int index = to_sensor_dev_attr_2(devattr)->index;
357 struct tmp401_data *data = dev_get_drvdata(dev);
358 struct i2c_client *client = data->client;
359 long val;
360 u16 reg;
361 u8 regaddr;
362
363 if (kstrtol(buf, 10, &val))
364 return -EINVAL;
365
366 reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
367
368 mutex_lock(&data->update_lock);
369
370 regaddr = data->kind == tmp432 ? TMP432_TEMP_MSB_WRITE[nr][index]
371 : TMP401_TEMP_MSB_WRITE[nr][index];
372 i2c_smbus_write_byte_data(client, regaddr, reg >> 8);
373 if (nr != 3) {
374 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[nr][index]
375 : TMP401_TEMP_LSB[nr][index];
376 i2c_smbus_write_byte_data(client, regaddr, reg & 0xFF);
377 }
378 data->temp[nr][index] = reg;
379
380 mutex_unlock(&data->update_lock);
381
382 return count;
383}
384
385static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
386 *devattr, const char *buf, size_t count)
387{
388 int temp, index = to_sensor_dev_attr(devattr)->index;
389 struct tmp401_data *data = tmp401_update_device(dev);
390 long val;
391 u8 reg;
392
393 if (IS_ERR(data))
394 return PTR_ERR(data);
395
396 if (kstrtol(buf, 10, &val))
397 return -EINVAL;
398
399 if (data->config & TMP401_CONFIG_RANGE)
400 val = clamp_val(val, -64000, 191000);
401 else
402 val = clamp_val(val, 0, 127000);
403
404 mutex_lock(&data->update_lock);
405 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
406 val = clamp_val(val, temp - 255000, temp);
407 reg = ((temp - val) + 500) / 1000;
408
409 i2c_smbus_write_byte_data(data->client, TMP401_TEMP_CRIT_HYST,
410 reg);
411
412 data->temp_crit_hyst = reg;
413
414 mutex_unlock(&data->update_lock);
415
416 return count;
417}
418
419/*
420 * Resets the historical measurements of minimum and maximum temperatures.
421 * This is done by writing any value to any of the minimum/maximum registers
422 * (0x30-0x37).
423 */
424static ssize_t reset_temp_history(struct device *dev,
425 struct device_attribute *devattr, const char *buf, size_t count)
426{
427 struct tmp401_data *data = dev_get_drvdata(dev);
428 struct i2c_client *client = data->client;
429 long val;
430
431 if (kstrtol(buf, 10, &val))
432 return -EINVAL;
433
434 if (val != 1) {
435 dev_err(dev,
436 "temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
437 val);
438 return -EINVAL;
439 }
440 mutex_lock(&data->update_lock);
441 i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
442 data->valid = 0;
443 mutex_unlock(&data->update_lock);
444
445 return count;
446}
447
448static ssize_t show_update_interval(struct device *dev,
449 struct device_attribute *attr, char *buf)
450{
451 struct tmp401_data *data = dev_get_drvdata(dev);
452
453 return sprintf(buf, "%u\n", data->update_interval);
454}
455
456static ssize_t set_update_interval(struct device *dev,
457 struct device_attribute *attr,
458 const char *buf, size_t count)
459{
460 struct tmp401_data *data = dev_get_drvdata(dev);
461 struct i2c_client *client = data->client;
462 unsigned long val;
463 int err, rate;
464
465 err = kstrtoul(buf, 10, &val);
466 if (err)
467 return err;
468
469 /*
470 * For valid rates, interval can be calculated as
471 * interval = (1 << (7 - rate)) * 125;
472 * Rounded rate is therefore
473 * rate = 7 - __fls(interval * 4 / (125 * 3));
474 * Use clamp_val() to avoid overflows, and to ensure valid input
475 * for __fls.
476 */
477 val = clamp_val(val, 125, 16000);
478 rate = 7 - __fls(val * 4 / (125 * 3));
479 mutex_lock(&data->update_lock);
480 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, rate);
481 data->update_interval = (1 << (7 - rate)) * 125;
482 mutex_unlock(&data->update_lock);
483
484 return count;
485}
486
487static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
488static SENSOR_DEVICE_ATTR_2(temp1_min, S_IWUSR | S_IRUGO, show_temp,
489 store_temp, 1, 0);
490static SENSOR_DEVICE_ATTR_2(temp1_max, S_IWUSR | S_IRUGO, show_temp,
491 store_temp, 2, 0);
492static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
493 store_temp, 3, 0);
494static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
495 show_temp_crit_hyst, store_temp_crit_hyst, 0);
496static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_status, NULL,
497 1, TMP432_STATUS_LOCAL);
498static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_status, NULL,
499 2, TMP432_STATUS_LOCAL);
500static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_status, NULL,
501 3, TMP432_STATUS_LOCAL);
502static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1);
503static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp,
504 store_temp, 1, 1);
505static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp,
506 store_temp, 2, 1);
507static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IWUSR | S_IRUGO, show_temp,
508 store_temp, 3, 1);
509static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst,
510 NULL, 1);
511static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_status, NULL,
512 0, TMP432_STATUS_REMOTE1);
513static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_status, NULL,
514 1, TMP432_STATUS_REMOTE1);
515static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_status, NULL,
516 2, TMP432_STATUS_REMOTE1);
517static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_status, NULL,
518 3, TMP432_STATUS_REMOTE1);
519
520static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
521 set_update_interval);
522
523static struct attribute *tmp401_attributes[] = {
524 &sensor_dev_attr_temp1_input.dev_attr.attr,
525 &sensor_dev_attr_temp1_min.dev_attr.attr,
526 &sensor_dev_attr_temp1_max.dev_attr.attr,
527 &sensor_dev_attr_temp1_crit.dev_attr.attr,
528 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
529 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
530 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
531 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
532
533 &sensor_dev_attr_temp2_input.dev_attr.attr,
534 &sensor_dev_attr_temp2_min.dev_attr.attr,
535 &sensor_dev_attr_temp2_max.dev_attr.attr,
536 &sensor_dev_attr_temp2_crit.dev_attr.attr,
537 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
538 &sensor_dev_attr_temp2_fault.dev_attr.attr,
539 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
540 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
541 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
542
543 &dev_attr_update_interval.attr,
544
545 NULL
546};
547
548static const struct attribute_group tmp401_group = {
549 .attrs = tmp401_attributes,
550};
551
552/*
553 * Additional features of the TMP411 chip.
554 * The TMP411 stores the minimum and maximum
555 * temperature measured since power-on, chip-reset, or
556 * minimum and maximum register reset for both the local
557 * and remote channels.
558 */
559static SENSOR_DEVICE_ATTR_2(temp1_lowest, S_IRUGO, show_temp, NULL, 4, 0);
560static SENSOR_DEVICE_ATTR_2(temp1_highest, S_IRUGO, show_temp, NULL, 5, 0);
561static SENSOR_DEVICE_ATTR_2(temp2_lowest, S_IRUGO, show_temp, NULL, 4, 1);
562static SENSOR_DEVICE_ATTR_2(temp2_highest, S_IRUGO, show_temp, NULL, 5, 1);
563static SENSOR_DEVICE_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history,
564 0);
565
566static struct attribute *tmp411_attributes[] = {
567 &sensor_dev_attr_temp1_highest.dev_attr.attr,
568 &sensor_dev_attr_temp1_lowest.dev_attr.attr,
569 &sensor_dev_attr_temp2_highest.dev_attr.attr,
570 &sensor_dev_attr_temp2_lowest.dev_attr.attr,
571 &sensor_dev_attr_temp_reset_history.dev_attr.attr,
572 NULL
573};
574
575static const struct attribute_group tmp411_group = {
576 .attrs = tmp411_attributes,
577};
578
579static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0, 2);
580static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp,
581 store_temp, 1, 2);
582static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp,
583 store_temp, 2, 2);
584static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IWUSR | S_IRUGO, show_temp,
585 store_temp, 3, 2);
586static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temp_crit_hyst,
587 NULL, 2);
588static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_status, NULL,
589 0, TMP432_STATUS_REMOTE2);
590static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_status, NULL,
591 1, TMP432_STATUS_REMOTE2);
592static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_status, NULL,
593 2, TMP432_STATUS_REMOTE2);
594static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_status, NULL,
595 3, TMP432_STATUS_REMOTE2);
596
597static struct attribute *tmp432_attributes[] = {
598 &sensor_dev_attr_temp3_input.dev_attr.attr,
599 &sensor_dev_attr_temp3_min.dev_attr.attr,
600 &sensor_dev_attr_temp3_max.dev_attr.attr,
601 &sensor_dev_attr_temp3_crit.dev_attr.attr,
602 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
603 &sensor_dev_attr_temp3_fault.dev_attr.attr,
604 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
605 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
606 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
607
608 NULL
609};
610
611static const struct attribute_group tmp432_group = {
612 .attrs = tmp432_attributes,
613};
614
615/*
616 * Begin non sysfs callback code (aka Real code)
617 */
618
619static int tmp401_init_client(struct tmp401_data *data,
620 struct i2c_client *client)
621{
622 int config, config_orig, status = 0;
623
624 /* Set the conversion rate to 2 Hz */
625 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
626 data->update_interval = 500;
627
628 /* Start conversions (disable shutdown if necessary) */
629 config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
630 if (config < 0)
631 return config;
632
633 config_orig = config;
634 config &= ~TMP401_CONFIG_SHUTDOWN;
635
636 if (config != config_orig)
637 status = i2c_smbus_write_byte_data(client,
638 TMP401_CONFIG_WRITE,
639 config);
640
641 return status;
642}
643
644static int tmp401_detect(struct i2c_client *client,
645 struct i2c_board_info *info)
646{
647 enum chips kind;
648 struct i2c_adapter *adapter = client->adapter;
649 u8 reg;
650
651 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
652 return -ENODEV;
653
654 /* Detect and identify the chip */
655 reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
656 if (reg != TMP401_MANUFACTURER_ID)
657 return -ENODEV;
658
659 reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
660
661 switch (reg) {
662 case TMP401_DEVICE_ID:
663 if (client->addr != 0x4c)
664 return -ENODEV;
665 kind = tmp401;
666 break;
667 case TMP411A_DEVICE_ID:
668 if (client->addr != 0x4c)
669 return -ENODEV;
670 kind = tmp411;
671 break;
672 case TMP411B_DEVICE_ID:
673 if (client->addr != 0x4d)
674 return -ENODEV;
675 kind = tmp411;
676 break;
677 case TMP411C_DEVICE_ID:
678 if (client->addr != 0x4e)
679 return -ENODEV;
680 kind = tmp411;
681 break;
682 case TMP431_DEVICE_ID:
683 if (client->addr != 0x4c && client->addr != 0x4d)
684 return -ENODEV;
685 kind = tmp431;
686 break;
687 case TMP432_DEVICE_ID:
688 if (client->addr != 0x4c && client->addr != 0x4d)
689 return -ENODEV;
690 kind = tmp432;
691 break;
692 case TMP435_DEVICE_ID:
693 kind = tmp435;
694 break;
695 default:
696 return -ENODEV;
697 }
698
699 reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
700 if (reg & 0x1b)
701 return -ENODEV;
702
703 reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
704 /* Datasheet says: 0x1-0x6 */
705 if (reg > 15)
706 return -ENODEV;
707
708 strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
709
710 return 0;
711}
712
713static int tmp401_probe(struct i2c_client *client,
714 const struct i2c_device_id *id)
715{
716 static const char * const names[] = {
717 "TMP401", "TMP411", "TMP431", "TMP432", "TMP435"
718 };
719 struct device *dev = &client->dev;
720 struct device *hwmon_dev;
721 struct tmp401_data *data;
722 int groups = 0, status;
723
724 data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
725 if (!data)
726 return -ENOMEM;
727
728 data->client = client;
729 mutex_init(&data->update_lock);
730 data->kind = id->driver_data;
731
732 /* Initialize the TMP401 chip */
733 status = tmp401_init_client(data, client);
734 if (status < 0)
735 return status;
736
737 /* Register sysfs hooks */
738 data->groups[groups++] = &tmp401_group;
739
740 /* Register additional tmp411 sysfs hooks */
741 if (data->kind == tmp411)
742 data->groups[groups++] = &tmp411_group;
743
744 /* Register additional tmp432 sysfs hooks */
745 if (data->kind == tmp432)
746 data->groups[groups++] = &tmp432_group;
747
748 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
749 data, data->groups);
750 if (IS_ERR(hwmon_dev))
751 return PTR_ERR(hwmon_dev);
752
753 dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
754
755 return 0;
756}
757
758static struct i2c_driver tmp401_driver = {
759 .class = I2C_CLASS_HWMON,
760 .driver = {
761 .name = "tmp401",
762 },
763 .probe = tmp401_probe,
764 .id_table = tmp401_id,
765 .detect = tmp401_detect,
766 .address_list = normal_i2c,
767};
768
769module_i2c_driver(tmp401_driver);
770
771MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
772MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
773MODULE_LICENSE("GPL");
1/* tmp401.c
2 *
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>
7 *
8 * Cleanup and support for TMP431 and TMP432 by Guenter Roeck
9 * Copyright (c) 2013 Guenter Roeck <linux@roeck-us.net>
10 *
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.
15 *
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.
20 *
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.
24 */
25
26/*
27 * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
28 *
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.
32 */
33
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>
45
46/* Addresses to scan */
47static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4c, 0x4d,
48 0x4e, 0x4f, I2C_CLIENT_END };
49
50enum chips { tmp401, tmp411, tmp431, tmp432, tmp435, tmp461 };
51
52/*
53 * The TMP401 registers, note some registers have different addresses for
54 * reading and writing
55 */
56#define TMP401_STATUS 0x02
57#define TMP401_CONFIG_READ 0x03
58#define TMP401_CONFIG_WRITE 0x09
59#define TMP401_CONVERSION_RATE_READ 0x04
60#define TMP401_CONVERSION_RATE_WRITE 0x0A
61#define TMP401_TEMP_CRIT_HYST 0x21
62#define TMP401_MANUFACTURER_ID_REG 0xFE
63#define TMP401_DEVICE_ID_REG 0xFF
64
65static const u8 TMP401_TEMP_MSB_READ[7][2] = {
66 { 0x00, 0x01 }, /* temp */
67 { 0x06, 0x08 }, /* low limit */
68 { 0x05, 0x07 }, /* high limit */
69 { 0x20, 0x19 }, /* therm (crit) limit */
70 { 0x30, 0x34 }, /* lowest */
71 { 0x32, 0x36 }, /* highest */
72 { 0, 0x11 }, /* offset */
73};
74
75static const u8 TMP401_TEMP_MSB_WRITE[7][2] = {
76 { 0, 0 }, /* temp (unused) */
77 { 0x0C, 0x0E }, /* low limit */
78 { 0x0B, 0x0D }, /* high limit */
79 { 0x20, 0x19 }, /* therm (crit) limit */
80 { 0x30, 0x34 }, /* lowest */
81 { 0x32, 0x36 }, /* highest */
82 { 0, 0x11 }, /* offset */
83};
84
85static const u8 TMP401_TEMP_LSB[7][2] = {
86 { 0x15, 0x10 }, /* temp */
87 { 0x17, 0x14 }, /* low limit */
88 { 0x16, 0x13 }, /* high limit */
89 { 0, 0 }, /* therm (crit) limit (unused) */
90 { 0x31, 0x35 }, /* lowest */
91 { 0x33, 0x37 }, /* highest */
92 { 0, 0x12 }, /* offset */
93};
94
95static const u8 TMP432_TEMP_MSB_READ[4][3] = {
96 { 0x00, 0x01, 0x23 }, /* temp */
97 { 0x06, 0x08, 0x16 }, /* low limit */
98 { 0x05, 0x07, 0x15 }, /* high limit */
99 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
100};
101
102static const u8 TMP432_TEMP_MSB_WRITE[4][3] = {
103 { 0, 0, 0 }, /* temp - unused */
104 { 0x0C, 0x0E, 0x16 }, /* low limit */
105 { 0x0B, 0x0D, 0x15 }, /* high limit */
106 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
107};
108
109static const u8 TMP432_TEMP_LSB[3][3] = {
110 { 0x29, 0x10, 0x24 }, /* temp */
111 { 0x3E, 0x14, 0x18 }, /* low limit */
112 { 0x3D, 0x13, 0x17 }, /* high limit */
113};
114
115/* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
116static const u8 TMP432_STATUS_REG[] = {
117 0x1b, 0x36, 0x35, 0x37 };
118
119/* Flags */
120#define TMP401_CONFIG_RANGE BIT(2)
121#define TMP401_CONFIG_SHUTDOWN BIT(6)
122#define TMP401_STATUS_LOCAL_CRIT BIT(0)
123#define TMP401_STATUS_REMOTE_CRIT BIT(1)
124#define TMP401_STATUS_REMOTE_OPEN BIT(2)
125#define TMP401_STATUS_REMOTE_LOW BIT(3)
126#define TMP401_STATUS_REMOTE_HIGH BIT(4)
127#define TMP401_STATUS_LOCAL_LOW BIT(5)
128#define TMP401_STATUS_LOCAL_HIGH BIT(6)
129
130/* On TMP432, each status has its own register */
131#define TMP432_STATUS_LOCAL BIT(0)
132#define TMP432_STATUS_REMOTE1 BIT(1)
133#define TMP432_STATUS_REMOTE2 BIT(2)
134
135/* Manufacturer / Device ID's */
136#define TMP401_MANUFACTURER_ID 0x55
137#define TMP401_DEVICE_ID 0x11
138#define TMP411A_DEVICE_ID 0x12
139#define TMP411B_DEVICE_ID 0x13
140#define TMP411C_DEVICE_ID 0x10
141#define TMP431_DEVICE_ID 0x31
142#define TMP432_DEVICE_ID 0x32
143#define TMP435_DEVICE_ID 0x35
144
145/*
146 * Driver data (common to all clients)
147 */
148
149static const struct i2c_device_id tmp401_id[] = {
150 { "tmp401", tmp401 },
151 { "tmp411", tmp411 },
152 { "tmp431", tmp431 },
153 { "tmp432", tmp432 },
154 { "tmp435", tmp435 },
155 { "tmp461", tmp461 },
156 { }
157};
158MODULE_DEVICE_TABLE(i2c, tmp401_id);
159
160/*
161 * Client data (each client gets its own)
162 */
163
164struct tmp401_data {
165 struct i2c_client *client;
166 const struct attribute_group *groups[3];
167 struct mutex update_lock;
168 char valid; /* zero until following fields are valid */
169 unsigned long last_updated; /* in jiffies */
170 enum chips kind;
171
172 unsigned int update_interval; /* in milliseconds */
173
174 /* register values */
175 u8 status[4];
176 u8 config;
177 u16 temp[7][3];
178 u8 temp_crit_hyst;
179};
180
181/*
182 * Sysfs attr show / store functions
183 */
184
185static int tmp401_register_to_temp(u16 reg, u8 config)
186{
187 int temp = reg;
188
189 if (config & TMP401_CONFIG_RANGE)
190 temp -= 64 * 256;
191
192 return DIV_ROUND_CLOSEST(temp * 125, 32);
193}
194
195static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
196{
197 if (config & TMP401_CONFIG_RANGE) {
198 temp = clamp_val(temp, -64000, 191000);
199 temp += 64000;
200 } else
201 temp = clamp_val(temp, 0, 127000);
202
203 return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
204}
205
206static int tmp401_update_device_reg16(struct i2c_client *client,
207 struct tmp401_data *data)
208{
209 int i, j, val;
210 int num_regs = data->kind == tmp411 ? 6 : 4;
211 int num_sensors = data->kind == tmp432 ? 3 : 2;
212
213 for (i = 0; i < num_sensors; i++) { /* local / r1 / r2 */
214 for (j = 0; j < num_regs; j++) { /* temp / low / ... */
215 u8 regaddr;
216 /*
217 * High byte must be read first immediately followed
218 * by the low byte
219 */
220 regaddr = data->kind == tmp432 ?
221 TMP432_TEMP_MSB_READ[j][i] :
222 TMP401_TEMP_MSB_READ[j][i];
223 val = i2c_smbus_read_byte_data(client, regaddr);
224 if (val < 0)
225 return val;
226 data->temp[j][i] = val << 8;
227 if (j == 3) /* crit is msb only */
228 continue;
229 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[j][i]
230 : TMP401_TEMP_LSB[j][i];
231 val = i2c_smbus_read_byte_data(client, regaddr);
232 if (val < 0)
233 return val;
234 data->temp[j][i] |= val;
235 }
236 }
237 return 0;
238}
239
240static struct tmp401_data *tmp401_update_device(struct device *dev)
241{
242 struct tmp401_data *data = dev_get_drvdata(dev);
243 struct i2c_client *client = data->client;
244 struct tmp401_data *ret = data;
245 int i, val;
246 unsigned long next_update;
247
248 mutex_lock(&data->update_lock);
249
250 next_update = data->last_updated +
251 msecs_to_jiffies(data->update_interval);
252 if (time_after(jiffies, next_update) || !data->valid) {
253 if (data->kind != tmp432) {
254 /*
255 * The driver uses the TMP432 status format internally.
256 * Convert status to TMP432 format for other chips.
257 */
258 val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
259 if (val < 0) {
260 ret = ERR_PTR(val);
261 goto abort;
262 }
263 data->status[0] =
264 (val & TMP401_STATUS_REMOTE_OPEN) >> 1;
265 data->status[1] =
266 ((val & TMP401_STATUS_REMOTE_LOW) >> 2) |
267 ((val & TMP401_STATUS_LOCAL_LOW) >> 5);
268 data->status[2] =
269 ((val & TMP401_STATUS_REMOTE_HIGH) >> 3) |
270 ((val & TMP401_STATUS_LOCAL_HIGH) >> 6);
271 data->status[3] = val & (TMP401_STATUS_LOCAL_CRIT
272 | TMP401_STATUS_REMOTE_CRIT);
273 } else {
274 for (i = 0; i < ARRAY_SIZE(data->status); i++) {
275 val = i2c_smbus_read_byte_data(client,
276 TMP432_STATUS_REG[i]);
277 if (val < 0) {
278 ret = ERR_PTR(val);
279 goto abort;
280 }
281 data->status[i] = val;
282 }
283 }
284
285 val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
286 if (val < 0) {
287 ret = ERR_PTR(val);
288 goto abort;
289 }
290 data->config = val;
291 val = tmp401_update_device_reg16(client, data);
292 if (val < 0) {
293 ret = ERR_PTR(val);
294 goto abort;
295 }
296 val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
297 if (val < 0) {
298 ret = ERR_PTR(val);
299 goto abort;
300 }
301 data->temp_crit_hyst = val;
302
303 data->last_updated = jiffies;
304 data->valid = 1;
305 }
306
307abort:
308 mutex_unlock(&data->update_lock);
309 return ret;
310}
311
312static ssize_t show_temp(struct device *dev,
313 struct device_attribute *devattr, char *buf)
314{
315 int nr = to_sensor_dev_attr_2(devattr)->nr;
316 int index = to_sensor_dev_attr_2(devattr)->index;
317 struct tmp401_data *data = tmp401_update_device(dev);
318
319 if (IS_ERR(data))
320 return PTR_ERR(data);
321
322 return sprintf(buf, "%d\n",
323 tmp401_register_to_temp(data->temp[nr][index], data->config));
324}
325
326static ssize_t show_temp_crit_hyst(struct device *dev,
327 struct device_attribute *devattr, char *buf)
328{
329 int temp, index = to_sensor_dev_attr(devattr)->index;
330 struct tmp401_data *data = tmp401_update_device(dev);
331
332 if (IS_ERR(data))
333 return PTR_ERR(data);
334
335 mutex_lock(&data->update_lock);
336 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
337 temp -= data->temp_crit_hyst * 1000;
338 mutex_unlock(&data->update_lock);
339
340 return sprintf(buf, "%d\n", temp);
341}
342
343static ssize_t show_status(struct device *dev,
344 struct device_attribute *devattr, char *buf)
345{
346 int nr = to_sensor_dev_attr_2(devattr)->nr;
347 int mask = to_sensor_dev_attr_2(devattr)->index;
348 struct tmp401_data *data = tmp401_update_device(dev);
349
350 if (IS_ERR(data))
351 return PTR_ERR(data);
352
353 return sprintf(buf, "%d\n", !!(data->status[nr] & mask));
354}
355
356static ssize_t store_temp(struct device *dev, struct device_attribute *devattr,
357 const char *buf, size_t count)
358{
359 int nr = to_sensor_dev_attr_2(devattr)->nr;
360 int index = to_sensor_dev_attr_2(devattr)->index;
361 struct tmp401_data *data = dev_get_drvdata(dev);
362 struct i2c_client *client = data->client;
363 long val;
364 u16 reg;
365 u8 regaddr;
366
367 if (kstrtol(buf, 10, &val))
368 return -EINVAL;
369
370 reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
371
372 mutex_lock(&data->update_lock);
373
374 regaddr = data->kind == tmp432 ? TMP432_TEMP_MSB_WRITE[nr][index]
375 : TMP401_TEMP_MSB_WRITE[nr][index];
376 i2c_smbus_write_byte_data(client, regaddr, reg >> 8);
377 if (nr != 3) {
378 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[nr][index]
379 : TMP401_TEMP_LSB[nr][index];
380 i2c_smbus_write_byte_data(client, regaddr, reg & 0xFF);
381 }
382 data->temp[nr][index] = reg;
383
384 mutex_unlock(&data->update_lock);
385
386 return count;
387}
388
389static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
390 *devattr, const char *buf, size_t count)
391{
392 int temp, index = to_sensor_dev_attr(devattr)->index;
393 struct tmp401_data *data = tmp401_update_device(dev);
394 long val;
395 u8 reg;
396
397 if (IS_ERR(data))
398 return PTR_ERR(data);
399
400 if (kstrtol(buf, 10, &val))
401 return -EINVAL;
402
403 if (data->config & TMP401_CONFIG_RANGE)
404 val = clamp_val(val, -64000, 191000);
405 else
406 val = clamp_val(val, 0, 127000);
407
408 mutex_lock(&data->update_lock);
409 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
410 val = clamp_val(val, temp - 255000, temp);
411 reg = ((temp - val) + 500) / 1000;
412
413 i2c_smbus_write_byte_data(data->client, TMP401_TEMP_CRIT_HYST,
414 reg);
415
416 data->temp_crit_hyst = reg;
417
418 mutex_unlock(&data->update_lock);
419
420 return count;
421}
422
423/*
424 * Resets the historical measurements of minimum and maximum temperatures.
425 * This is done by writing any value to any of the minimum/maximum registers
426 * (0x30-0x37).
427 */
428static ssize_t reset_temp_history(struct device *dev,
429 struct device_attribute *devattr, const char *buf, size_t count)
430{
431 struct tmp401_data *data = dev_get_drvdata(dev);
432 struct i2c_client *client = data->client;
433 long val;
434
435 if (kstrtol(buf, 10, &val))
436 return -EINVAL;
437
438 if (val != 1) {
439 dev_err(dev,
440 "temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
441 val);
442 return -EINVAL;
443 }
444 mutex_lock(&data->update_lock);
445 i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
446 data->valid = 0;
447 mutex_unlock(&data->update_lock);
448
449 return count;
450}
451
452static ssize_t show_update_interval(struct device *dev,
453 struct device_attribute *attr, char *buf)
454{
455 struct tmp401_data *data = dev_get_drvdata(dev);
456
457 return sprintf(buf, "%u\n", data->update_interval);
458}
459
460static ssize_t set_update_interval(struct device *dev,
461 struct device_attribute *attr,
462 const char *buf, size_t count)
463{
464 struct tmp401_data *data = dev_get_drvdata(dev);
465 struct i2c_client *client = data->client;
466 unsigned long val;
467 int err, rate;
468
469 err = kstrtoul(buf, 10, &val);
470 if (err)
471 return err;
472
473 /*
474 * For valid rates, interval can be calculated as
475 * interval = (1 << (7 - rate)) * 125;
476 * Rounded rate is therefore
477 * rate = 7 - __fls(interval * 4 / (125 * 3));
478 * Use clamp_val() to avoid overflows, and to ensure valid input
479 * for __fls.
480 */
481 val = clamp_val(val, 125, 16000);
482 rate = 7 - __fls(val * 4 / (125 * 3));
483 mutex_lock(&data->update_lock);
484 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, rate);
485 data->update_interval = (1 << (7 - rate)) * 125;
486 mutex_unlock(&data->update_lock);
487
488 return count;
489}
490
491static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
492static SENSOR_DEVICE_ATTR_2(temp1_min, S_IWUSR | S_IRUGO, show_temp,
493 store_temp, 1, 0);
494static SENSOR_DEVICE_ATTR_2(temp1_max, S_IWUSR | S_IRUGO, show_temp,
495 store_temp, 2, 0);
496static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
497 store_temp, 3, 0);
498static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
499 show_temp_crit_hyst, store_temp_crit_hyst, 0);
500static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_status, NULL,
501 1, TMP432_STATUS_LOCAL);
502static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_status, NULL,
503 2, TMP432_STATUS_LOCAL);
504static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_status, NULL,
505 3, TMP432_STATUS_LOCAL);
506static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1);
507static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp,
508 store_temp, 1, 1);
509static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp,
510 store_temp, 2, 1);
511static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IWUSR | S_IRUGO, show_temp,
512 store_temp, 3, 1);
513static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst,
514 NULL, 1);
515static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_status, NULL,
516 0, TMP432_STATUS_REMOTE1);
517static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_status, NULL,
518 1, TMP432_STATUS_REMOTE1);
519static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_status, NULL,
520 2, TMP432_STATUS_REMOTE1);
521static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_status, NULL,
522 3, TMP432_STATUS_REMOTE1);
523
524static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
525 set_update_interval);
526
527static struct attribute *tmp401_attributes[] = {
528 &sensor_dev_attr_temp1_input.dev_attr.attr,
529 &sensor_dev_attr_temp1_min.dev_attr.attr,
530 &sensor_dev_attr_temp1_max.dev_attr.attr,
531 &sensor_dev_attr_temp1_crit.dev_attr.attr,
532 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
533 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
534 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
535 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
536
537 &sensor_dev_attr_temp2_input.dev_attr.attr,
538 &sensor_dev_attr_temp2_min.dev_attr.attr,
539 &sensor_dev_attr_temp2_max.dev_attr.attr,
540 &sensor_dev_attr_temp2_crit.dev_attr.attr,
541 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
542 &sensor_dev_attr_temp2_fault.dev_attr.attr,
543 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
544 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
545 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
546
547 &dev_attr_update_interval.attr,
548
549 NULL
550};
551
552static const struct attribute_group tmp401_group = {
553 .attrs = tmp401_attributes,
554};
555
556/*
557 * Additional features of the TMP411 chip.
558 * The TMP411 stores the minimum and maximum
559 * temperature measured since power-on, chip-reset, or
560 * minimum and maximum register reset for both the local
561 * and remote channels.
562 */
563static SENSOR_DEVICE_ATTR_2(temp1_lowest, S_IRUGO, show_temp, NULL, 4, 0);
564static SENSOR_DEVICE_ATTR_2(temp1_highest, S_IRUGO, show_temp, NULL, 5, 0);
565static SENSOR_DEVICE_ATTR_2(temp2_lowest, S_IRUGO, show_temp, NULL, 4, 1);
566static SENSOR_DEVICE_ATTR_2(temp2_highest, S_IRUGO, show_temp, NULL, 5, 1);
567static SENSOR_DEVICE_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history,
568 0);
569
570static struct attribute *tmp411_attributes[] = {
571 &sensor_dev_attr_temp1_highest.dev_attr.attr,
572 &sensor_dev_attr_temp1_lowest.dev_attr.attr,
573 &sensor_dev_attr_temp2_highest.dev_attr.attr,
574 &sensor_dev_attr_temp2_lowest.dev_attr.attr,
575 &sensor_dev_attr_temp_reset_history.dev_attr.attr,
576 NULL
577};
578
579static const struct attribute_group tmp411_group = {
580 .attrs = tmp411_attributes,
581};
582
583static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0, 2);
584static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp,
585 store_temp, 1, 2);
586static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp,
587 store_temp, 2, 2);
588static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IWUSR | S_IRUGO, show_temp,
589 store_temp, 3, 2);
590static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temp_crit_hyst,
591 NULL, 2);
592static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_status, NULL,
593 0, TMP432_STATUS_REMOTE2);
594static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_status, NULL,
595 1, TMP432_STATUS_REMOTE2);
596static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_status, NULL,
597 2, TMP432_STATUS_REMOTE2);
598static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_status, NULL,
599 3, TMP432_STATUS_REMOTE2);
600
601static struct attribute *tmp432_attributes[] = {
602 &sensor_dev_attr_temp3_input.dev_attr.attr,
603 &sensor_dev_attr_temp3_min.dev_attr.attr,
604 &sensor_dev_attr_temp3_max.dev_attr.attr,
605 &sensor_dev_attr_temp3_crit.dev_attr.attr,
606 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
607 &sensor_dev_attr_temp3_fault.dev_attr.attr,
608 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
609 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
610 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
611
612 NULL
613};
614
615static const struct attribute_group tmp432_group = {
616 .attrs = tmp432_attributes,
617};
618
619/*
620 * Additional features of the TMP461 chip.
621 * The TMP461 temperature offset for the remote channel.
622 */
623static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp,
624 store_temp, 6, 1);
625
626static struct attribute *tmp461_attributes[] = {
627 &sensor_dev_attr_temp2_offset.dev_attr.attr,
628 NULL
629};
630
631static const struct attribute_group tmp461_group = {
632 .attrs = tmp461_attributes,
633};
634
635/*
636 * Begin non sysfs callback code (aka Real code)
637 */
638
639static int tmp401_init_client(struct tmp401_data *data,
640 struct i2c_client *client)
641{
642 int config, config_orig, status = 0;
643
644 /* Set the conversion rate to 2 Hz */
645 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
646 data->update_interval = 500;
647
648 /* Start conversions (disable shutdown if necessary) */
649 config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
650 if (config < 0)
651 return config;
652
653 config_orig = config;
654 config &= ~TMP401_CONFIG_SHUTDOWN;
655
656 if (config != config_orig)
657 status = i2c_smbus_write_byte_data(client,
658 TMP401_CONFIG_WRITE,
659 config);
660
661 return status;
662}
663
664static int tmp401_detect(struct i2c_client *client,
665 struct i2c_board_info *info)
666{
667 enum chips kind;
668 struct i2c_adapter *adapter = client->adapter;
669 u8 reg;
670
671 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
672 return -ENODEV;
673
674 /* Detect and identify the chip */
675 reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
676 if (reg != TMP401_MANUFACTURER_ID)
677 return -ENODEV;
678
679 reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
680
681 switch (reg) {
682 case TMP401_DEVICE_ID:
683 if (client->addr != 0x4c)
684 return -ENODEV;
685 kind = tmp401;
686 break;
687 case TMP411A_DEVICE_ID:
688 if (client->addr != 0x4c)
689 return -ENODEV;
690 kind = tmp411;
691 break;
692 case TMP411B_DEVICE_ID:
693 if (client->addr != 0x4d)
694 return -ENODEV;
695 kind = tmp411;
696 break;
697 case TMP411C_DEVICE_ID:
698 if (client->addr != 0x4e)
699 return -ENODEV;
700 kind = tmp411;
701 break;
702 case TMP431_DEVICE_ID:
703 if (client->addr != 0x4c && client->addr != 0x4d)
704 return -ENODEV;
705 kind = tmp431;
706 break;
707 case TMP432_DEVICE_ID:
708 if (client->addr != 0x4c && client->addr != 0x4d)
709 return -ENODEV;
710 kind = tmp432;
711 break;
712 case TMP435_DEVICE_ID:
713 kind = tmp435;
714 break;
715 default:
716 return -ENODEV;
717 }
718
719 reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
720 if (reg & 0x1b)
721 return -ENODEV;
722
723 reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
724 /* Datasheet says: 0x1-0x6 */
725 if (reg > 15)
726 return -ENODEV;
727
728 strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
729
730 return 0;
731}
732
733static int tmp401_probe(struct i2c_client *client,
734 const struct i2c_device_id *id)
735{
736 static const char * const names[] = {
737 "TMP401", "TMP411", "TMP431", "TMP432", "TMP435", "TMP461"
738 };
739 struct device *dev = &client->dev;
740 struct device *hwmon_dev;
741 struct tmp401_data *data;
742 int groups = 0, status;
743
744 data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
745 if (!data)
746 return -ENOMEM;
747
748 data->client = client;
749 mutex_init(&data->update_lock);
750 data->kind = id->driver_data;
751
752 /* Initialize the TMP401 chip */
753 status = tmp401_init_client(data, client);
754 if (status < 0)
755 return status;
756
757 /* Register sysfs hooks */
758 data->groups[groups++] = &tmp401_group;
759
760 /* Register additional tmp411 sysfs hooks */
761 if (data->kind == tmp411)
762 data->groups[groups++] = &tmp411_group;
763
764 /* Register additional tmp432 sysfs hooks */
765 if (data->kind == tmp432)
766 data->groups[groups++] = &tmp432_group;
767
768 if (data->kind == tmp461)
769 data->groups[groups++] = &tmp461_group;
770
771 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
772 data, data->groups);
773 if (IS_ERR(hwmon_dev))
774 return PTR_ERR(hwmon_dev);
775
776 dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
777
778 return 0;
779}
780
781static struct i2c_driver tmp401_driver = {
782 .class = I2C_CLASS_HWMON,
783 .driver = {
784 .name = "tmp401",
785 },
786 .probe = tmp401_probe,
787 .id_table = tmp401_id,
788 .detect = tmp401_detect,
789 .address_list = normal_i2c,
790};
791
792module_i2c_driver(tmp401_driver);
793
794MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
795MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
796MODULE_LICENSE("GPL");