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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / hwmon / adt7411.c
blobc7010b91bc1335330ad054cd250c787236447433
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor)
4 *
5 * Copyright (C) 2008, 2010 Pengutronix
6 *
7 * TODO: SPI, use power-down mode for suspend?, interrupt handling?
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/mutex.h>
15 #include <linux/jiffies.h>
16 #include <linux/i2c.h>
17 #include <linux/hwmon.h>
18 #include <linux/hwmon-sysfs.h>
19 #include <linux/slab.h>
20
21 #define ADT7411_REG_STAT_1 0x00
22 #define ADT7411_STAT_1_INT_TEMP_HIGH BIT(0)
23 #define ADT7411_STAT_1_INT_TEMP_LOW BIT(1)
24 #define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 BIT(2)
25 #define ADT7411_STAT_1_EXT_TEMP_LOW BIT(3)
26 #define ADT7411_STAT_1_EXT_TEMP_FAULT BIT(4)
27 #define ADT7411_STAT_1_AIN2 BIT(5)
28 #define ADT7411_STAT_1_AIN3 BIT(6)
29 #define ADT7411_STAT_1_AIN4 BIT(7)
30 #define ADT7411_REG_STAT_2 0x01
31 #define ADT7411_STAT_2_AIN5 BIT(0)
32 #define ADT7411_STAT_2_AIN6 BIT(1)
33 #define ADT7411_STAT_2_AIN7 BIT(2)
34 #define ADT7411_STAT_2_AIN8 BIT(3)
35 #define ADT7411_STAT_2_VDD BIT(4)
36 #define ADT7411_REG_INT_TEMP_VDD_LSB 0x03
37 #define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04
38 #define ADT7411_REG_VDD_MSB 0x06
39 #define ADT7411_REG_INT_TEMP_MSB 0x07
40 #define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08
41
42 #define ADT7411_REG_CFG1 0x18
43 #define ADT7411_CFG1_START_MONITOR BIT(0)
44 #define ADT7411_CFG1_RESERVED_BIT1 BIT(1)
45 #define ADT7411_CFG1_EXT_TDM BIT(2)
46 #define ADT7411_CFG1_RESERVED_BIT3 BIT(3)
47
48 #define ADT7411_REG_CFG2 0x19
49 #define ADT7411_CFG2_DISABLE_AVG BIT(5)
50
51 #define ADT7411_REG_CFG3 0x1a
52 #define ADT7411_CFG3_ADC_CLK_225 BIT(0)
53 #define ADT7411_CFG3_RESERVED_BIT1 BIT(1)
54 #define ADT7411_CFG3_RESERVED_BIT2 BIT(2)
55 #define ADT7411_CFG3_RESERVED_BIT3 BIT(3)
56 #define ADT7411_CFG3_REF_VDD BIT(4)
57
58 #define ADT7411_REG_VDD_HIGH 0x23
59 #define ADT7411_REG_VDD_LOW 0x24
60 #define ADT7411_REG_TEMP_HIGH(nr) (0x25 + 2 * (nr))
61 #define ADT7411_REG_TEMP_LOW(nr) (0x26 + 2 * (nr))
62 #define ADT7411_REG_IN_HIGH(nr) ((nr) > 1 \
63 ? 0x2b + 2 * ((nr)-2) \
64 : 0x27)
65 #define ADT7411_REG_IN_LOW(nr) ((nr) > 1 \
66 ? 0x2c + 2 * ((nr)-2) \
67 : 0x28)
68
69 #define ADT7411_REG_DEVICE_ID 0x4d
70 #define ADT7411_REG_MANUFACTURER_ID 0x4e
71
72 #define ADT7411_DEVICE_ID 0x2
73 #define ADT7411_MANUFACTURER_ID 0x41
74
75 static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END };
76
77 static const u8 adt7411_in_alarm_reg[] = {
78 ADT7411_REG_STAT_2,
79 ADT7411_REG_STAT_1,
80 ADT7411_REG_STAT_1,
81 ADT7411_REG_STAT_1,
82 ADT7411_REG_STAT_1,
83 ADT7411_REG_STAT_2,
84 ADT7411_REG_STAT_2,
85 ADT7411_REG_STAT_2,
86 ADT7411_REG_STAT_2,
87 };
88
89 static const u8 adt7411_in_alarm_bits[] = {
90 ADT7411_STAT_2_VDD,
91 ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1,
92 ADT7411_STAT_1_AIN2,
93 ADT7411_STAT_1_AIN3,
94 ADT7411_STAT_1_AIN4,
95 ADT7411_STAT_2_AIN5,
96 ADT7411_STAT_2_AIN6,
97 ADT7411_STAT_2_AIN7,
98 ADT7411_STAT_2_AIN8,
99 };
100
101 struct adt7411_data {
102 struct mutex device_lock; /* for "atomic" device accesses */
103 struct mutex update_lock;
104 unsigned long next_update;
105 long vref_cached;
106 struct i2c_client *client;
107 bool use_ext_temp;
108 };
109
110 /*
111 * When reading a register containing (up to 4) lsb, all associated
112 * msb-registers get locked by the hardware. After _one_ of those msb is read,
113 * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb
114 * is protected here with a mutex, too.
115 */
116 static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg,
117 u8 msb_reg, u8 lsb_shift)
118 {
119 struct adt7411_data *data = i2c_get_clientdata(client);
120 int val, tmp;
121
122 mutex_lock(&data->device_lock);
123
124 val = i2c_smbus_read_byte_data(client, lsb_reg);
125 if (val < 0)
126 goto exit_unlock;
127
128 tmp = (val >> lsb_shift) & 3;
129 val = i2c_smbus_read_byte_data(client, msb_reg);
130
131 if (val >= 0)
132 val = (val << 2) | tmp;
133
134 exit_unlock:
135 mutex_unlock(&data->device_lock);
136
137 return val;
138 }
139
140 static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit,
141 bool flag)
142 {
143 struct adt7411_data *data = i2c_get_clientdata(client);
144 int ret, val;
145
146 mutex_lock(&data->device_lock);
147
148 ret = i2c_smbus_read_byte_data(client, reg);
149 if (ret < 0)
150 goto exit_unlock;
151
152 if (flag)
153 val = ret | bit;
154 else
155 val = ret & ~bit;
156
157 ret = i2c_smbus_write_byte_data(client, reg, val);
158
159 exit_unlock:
160 mutex_unlock(&data->device_lock);
161 return ret;
162 }
163
164 static ssize_t adt7411_show_bit(struct device *dev,
165 struct device_attribute *attr, char *buf)
166 {
167 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
168 struct adt7411_data *data = dev_get_drvdata(dev);
169 struct i2c_client *client = data->client;
170 int ret = i2c_smbus_read_byte_data(client, attr2->index);
171
172 return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr));
173 }
174
175 static ssize_t adt7411_set_bit(struct device *dev,
176 struct device_attribute *attr, const char *buf,
177 size_t count)
178 {
179 struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr);
180 struct adt7411_data *data = dev_get_drvdata(dev);
181 struct i2c_client *client = data->client;
182 int ret;
183 unsigned long flag;
184
185 ret = kstrtoul(buf, 0, &flag);
186 if (ret || flag > 1)
187 return -EINVAL;
188
189 ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag);
190
191 /* force update */
192 mutex_lock(&data->update_lock);
193 data->next_update = jiffies;
194 mutex_unlock(&data->update_lock);
195
196 return ret < 0 ? ret : count;
197 }
198
199 #define ADT7411_BIT_ATTR(__name, __reg, __bit) \
200 SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \
201 adt7411_set_bit, __bit, __reg)
202
203 static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG);
204 static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225);
205 static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD);
206
207 static struct attribute *adt7411_attrs[] = {
208 &sensor_dev_attr_no_average.dev_attr.attr,
209 &sensor_dev_attr_fast_sampling.dev_attr.attr,
210 &sensor_dev_attr_adc_ref_vdd.dev_attr.attr,
211 NULL
212 };
213 ATTRIBUTE_GROUPS(adt7411);
214
215 static int adt7411_read_in_alarm(struct device *dev, int channel, long *val)
216 {
217 struct adt7411_data *data = dev_get_drvdata(dev);
218 struct i2c_client *client = data->client;
219 int ret;
220
221 ret = i2c_smbus_read_byte_data(client, adt7411_in_alarm_reg[channel]);
222 if (ret < 0)
223 return ret;
224 *val = !!(ret & adt7411_in_alarm_bits[channel]);
225 return 0;
226 }
227
228 static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val)
229 {
230 struct adt7411_data *data = dev_get_drvdata(dev);
231 struct i2c_client *client = data->client;
232 int ret;
233
234 switch (attr) {
235 case hwmon_in_input:
236 ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
237 ADT7411_REG_VDD_MSB, 2);
238 if (ret < 0)
239 return ret;
240 *val = ret * 7000 / 1024;
241 return 0;
242 case hwmon_in_min:
243 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_LOW);
244 if (ret < 0)
245 return ret;
246 *val = ret * 7000 / 256;
247 return 0;
248 case hwmon_in_max:
249 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_HIGH);
250 if (ret < 0)
251 return ret;
252 *val = ret * 7000 / 256;
253 return 0;
254 case hwmon_in_alarm:
255 return adt7411_read_in_alarm(dev, 0, val);
256 default:
257 return -EOPNOTSUPP;
258 }
259 }
260
261 static int adt7411_update_vref(struct device *dev)
262 {
263 struct adt7411_data *data = dev_get_drvdata(dev);
264 struct i2c_client *client = data->client;
265 int val;
266
267 if (time_after_eq(jiffies, data->next_update)) {
268 val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3);
269 if (val < 0)
270 return val;
271
272 if (val & ADT7411_CFG3_REF_VDD) {
273 val = adt7411_read_in_vdd(dev, hwmon_in_input,
274 &data->vref_cached);
275 if (val < 0)
276 return val;
277 } else {
278 data->vref_cached = 2250;
279 }
280
281 data->next_update = jiffies + HZ;
282 }
283
284 return 0;
285 }
286
287 static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel,
288 long *val)
289 {
290 struct adt7411_data *data = dev_get_drvdata(dev);
291 struct i2c_client *client = data->client;
292
293 int ret;
294 int reg, lsb_reg, lsb_shift;
295 int nr = channel - 1;
296
297 mutex_lock(&data->update_lock);
298 ret = adt7411_update_vref(dev);
299 if (ret < 0)
300 goto exit_unlock;
301
302 switch (attr) {
303 case hwmon_in_input:
304 lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2);
305 lsb_shift = 2 * (nr & 0x03);
306 ret = adt7411_read_10_bit(client, lsb_reg,
307 ADT7411_REG_EXT_TEMP_AIN1_MSB + nr,
308 lsb_shift);
309 if (ret < 0)
310 goto exit_unlock;
311 *val = ret * data->vref_cached / 1024;
312 ret = 0;
313 break;
314 case hwmon_in_min:
315 case hwmon_in_max:
316 reg = (attr == hwmon_in_min)
317 ? ADT7411_REG_IN_LOW(channel)
318 : ADT7411_REG_IN_HIGH(channel);
319 ret = i2c_smbus_read_byte_data(client, reg);
320 if (ret < 0)
321 goto exit_unlock;
322 *val = ret * data->vref_cached / 256;
323 ret = 0;
324 break;
325 case hwmon_in_alarm:
326 ret = adt7411_read_in_alarm(dev, channel, val);
327 break;
328 default:
329 ret = -EOPNOTSUPP;
330 break;
331 }
332 exit_unlock:
333 mutex_unlock(&data->update_lock);
334 return ret;
335 }
336
337 static int adt7411_read_in(struct device *dev, u32 attr, int channel,
338 long *val)
339 {
340 if (channel == 0)
341 return adt7411_read_in_vdd(dev, attr, val);
342 else
343 return adt7411_read_in_chan(dev, attr, channel, val);
344 }
345
346
347 static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel,
348 long *val)
349 {
350 struct adt7411_data *data = dev_get_drvdata(dev);
351 struct i2c_client *client = data->client;
352 int ret, bit;
353
354 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_STAT_1);
355 if (ret < 0)
356 return ret;
357
358 switch (attr) {
359 case hwmon_temp_min_alarm:
360 bit = channel ? ADT7411_STAT_1_EXT_TEMP_LOW
361 : ADT7411_STAT_1_INT_TEMP_LOW;
362 break;
363 case hwmon_temp_max_alarm:
364 bit = channel ? ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1
365 : ADT7411_STAT_1_INT_TEMP_HIGH;
366 break;
367 case hwmon_temp_fault:
368 bit = ADT7411_STAT_1_EXT_TEMP_FAULT;
369 break;
370 default:
371 return -EOPNOTSUPP;
372 }
373
374 *val = !!(ret & bit);
375 return 0;
376 }
377
378 static int adt7411_read_temp(struct device *dev, u32 attr, int channel,
379 long *val)
380 {
381 struct adt7411_data *data = dev_get_drvdata(dev);
382 struct i2c_client *client = data->client;
383 int ret, reg, regl, regh;
384
385 switch (attr) {
386 case hwmon_temp_input:
387 regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB :
388 ADT7411_REG_INT_TEMP_VDD_LSB;
389 regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB :
390 ADT7411_REG_INT_TEMP_MSB;
391 ret = adt7411_read_10_bit(client, regl, regh, 0);
392 if (ret < 0)
393 return ret;
394 ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */
395 *val = ret * 250;
396 return 0;
397 case hwmon_temp_min:
398 case hwmon_temp_max:
399 reg = (attr == hwmon_temp_min)
400 ? ADT7411_REG_TEMP_LOW(channel)
401 : ADT7411_REG_TEMP_HIGH(channel);
402 ret = i2c_smbus_read_byte_data(client, reg);
403 if (ret < 0)
404 return ret;
405 ret = ret & 0x80 ? ret - 0x100 : ret; /* 8 bit signed */
406 *val = ret * 1000;
407 return 0;
408 case hwmon_temp_min_alarm:
409 case hwmon_temp_max_alarm:
410 case hwmon_temp_fault:
411 return adt7411_read_temp_alarm(dev, attr, channel, val);
412 default:
413 return -EOPNOTSUPP;
414 }
415 }
416
417 static int adt7411_read(struct device *dev, enum hwmon_sensor_types type,
418 u32 attr, int channel, long *val)
419 {
420 switch (type) {
421 case hwmon_in:
422 return adt7411_read_in(dev, attr, channel, val);
423 case hwmon_temp:
424 return adt7411_read_temp(dev, attr, channel, val);
425 default:
426 return -EOPNOTSUPP;
427 }
428 }
429
430 static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val)
431 {
432 struct adt7411_data *data = dev_get_drvdata(dev);
433 struct i2c_client *client = data->client;
434 int reg;
435
436 val = clamp_val(val, 0, 255 * 7000 / 256);
437 val = DIV_ROUND_CLOSEST(val * 256, 7000);
438
439 switch (attr) {
440 case hwmon_in_min:
441 reg = ADT7411_REG_VDD_LOW;
442 break;
443 case hwmon_in_max:
444 reg = ADT7411_REG_VDD_HIGH;
445 break;
446 default:
447 return -EOPNOTSUPP;
448 }
449
450 return i2c_smbus_write_byte_data(client, reg, val);
451 }
452
453 static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel,
454 long val)
455 {
456 struct adt7411_data *data = dev_get_drvdata(dev);
457 struct i2c_client *client = data->client;
458 int ret, reg;
459
460 mutex_lock(&data->update_lock);
461 ret = adt7411_update_vref(dev);
462 if (ret < 0)
463 goto exit_unlock;
464 val = clamp_val(val, 0, 255 * data->vref_cached / 256);
465 val = DIV_ROUND_CLOSEST(val * 256, data->vref_cached);
466
467 switch (attr) {
468 case hwmon_in_min:
469 reg = ADT7411_REG_IN_LOW(channel);
470 break;
471 case hwmon_in_max:
472 reg = ADT7411_REG_IN_HIGH(channel);
473 break;
474 default:
475 ret = -EOPNOTSUPP;
476 goto exit_unlock;
477 }
478
479 ret = i2c_smbus_write_byte_data(client, reg, val);
480 exit_unlock:
481 mutex_unlock(&data->update_lock);
482 return ret;
483 }
484
485 static int adt7411_write_in(struct device *dev, u32 attr, int channel,
486 long val)
487 {
488 if (channel == 0)
489 return adt7411_write_in_vdd(dev, attr, val);
490 else
491 return adt7411_write_in_chan(dev, attr, channel, val);
492 }
493
494 static int adt7411_write_temp(struct device *dev, u32 attr, int channel,
495 long val)
496 {
497 struct adt7411_data *data = dev_get_drvdata(dev);
498 struct i2c_client *client = data->client;
499 int reg;
500
501 val = clamp_val(val, -128000, 127000);
502 val = DIV_ROUND_CLOSEST(val, 1000);
503
504 switch (attr) {
505 case hwmon_temp_min:
506 reg = ADT7411_REG_TEMP_LOW(channel);
507 break;
508 case hwmon_temp_max:
509 reg = ADT7411_REG_TEMP_HIGH(channel);
510 break;
511 default:
512 return -EOPNOTSUPP;
513 }
514
515 return i2c_smbus_write_byte_data(client, reg, val);
516 }
517
518 static int adt7411_write(struct device *dev, enum hwmon_sensor_types type,
519 u32 attr, int channel, long val)
520 {
521 switch (type) {
522 case hwmon_in:
523 return adt7411_write_in(dev, attr, channel, val);
524 case hwmon_temp:
525 return adt7411_write_temp(dev, attr, channel, val);
526 default:
527 return -EOPNOTSUPP;
528 }
529 }
530
531 static umode_t adt7411_is_visible(const void *_data,
532 enum hwmon_sensor_types type,
533 u32 attr, int channel)
534 {
535 const struct adt7411_data *data = _data;
536 bool visible;
537
538 switch (type) {
539 case hwmon_in:
540 visible = channel == 0 || channel >= 3 || !data->use_ext_temp;
541 switch (attr) {
542 case hwmon_in_input:
543 case hwmon_in_alarm:
544 return visible ? S_IRUGO : 0;
545 case hwmon_in_min:
546 case hwmon_in_max:
547 return visible ? S_IRUGO | S_IWUSR : 0;
548 }
549 break;
550 case hwmon_temp:
551 visible = channel == 0 || data->use_ext_temp;
552 switch (attr) {
553 case hwmon_temp_input:
554 case hwmon_temp_min_alarm:
555 case hwmon_temp_max_alarm:
556 case hwmon_temp_fault:
557 return visible ? S_IRUGO : 0;
558 case hwmon_temp_min:
559 case hwmon_temp_max:
560 return visible ? S_IRUGO | S_IWUSR : 0;
561 }
562 break;
563 default:
564 break;
565 }
566 return 0;
567 }
568
569 static int adt7411_detect(struct i2c_client *client,
570 struct i2c_board_info *info)
571 {
572 int val;
573
574 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
575 return -ENODEV;
576
577 val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID);
578 if (val < 0 || val != ADT7411_MANUFACTURER_ID) {
579 dev_dbg(&client->dev,
580 "Wrong manufacturer ID. Got %d, expected %d\n",
581 val, ADT7411_MANUFACTURER_ID);
582 return -ENODEV;
583 }
584
585 val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID);
586 if (val < 0 || val != ADT7411_DEVICE_ID) {
587 dev_dbg(&client->dev,
588 "Wrong device ID. Got %d, expected %d\n",
589 val, ADT7411_DEVICE_ID);
590 return -ENODEV;
591 }
592
593 strlcpy(info->type, "adt7411", I2C_NAME_SIZE);
594
595 return 0;
596 }
597
598 static int adt7411_init_device(struct adt7411_data *data)
599 {
600 int ret;
601 u8 val;
602
603 ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3);
604 if (ret < 0)
605 return ret;
606
607 /*
608 * We must only write zero to bit 1 and bit 2 and only one to bit 3
609 * according to the datasheet.
610 */
611 val = ret;
612 val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2);
613 val |= ADT7411_CFG3_RESERVED_BIT3;
614
615 ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val);
616 if (ret < 0)
617 return ret;
618
619 ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1);
620 if (ret < 0)
621 return ret;
622
623 data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM;
624
625 /*
626 * We must only write zero to bit 1 and only one to bit 3 according to
627 * the datasheet.
628 */
629 val = ret;
630 val &= ~ADT7411_CFG1_RESERVED_BIT1;
631 val |= ADT7411_CFG1_RESERVED_BIT3;
632
633 /* enable monitoring */
634 val |= ADT7411_CFG1_START_MONITOR;
635
636 return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val);
637 }
638
639 static const struct hwmon_channel_info *adt7411_info[] = {
640 HWMON_CHANNEL_INFO(in,
641 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
642 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
643 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
644 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
645 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
646 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
647 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
648 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
649 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM),
650 HWMON_CHANNEL_INFO(temp,
651 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
652 HWMON_T_MAX | HWMON_T_MAX_ALARM,
653 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
654 HWMON_T_MAX | HWMON_T_MAX_ALARM | HWMON_T_FAULT),
655 NULL
656 };
657
658 static const struct hwmon_ops adt7411_hwmon_ops = {
659 .is_visible = adt7411_is_visible,
660 .read = adt7411_read,
661 .write = adt7411_write,
662 };
663
664 static const struct hwmon_chip_info adt7411_chip_info = {
665 .ops = &adt7411_hwmon_ops,
666 .info = adt7411_info,
667 };
668
669 static int adt7411_probe(struct i2c_client *client,
670 const struct i2c_device_id *id)
671 {
672 struct device *dev = &client->dev;
673 struct adt7411_data *data;
674 struct device *hwmon_dev;
675 int ret;
676
677 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
678 if (!data)
679 return -ENOMEM;
680
681 i2c_set_clientdata(client, data);
682 data->client = client;
683 mutex_init(&data->device_lock);
684 mutex_init(&data->update_lock);
685
686 ret = adt7411_init_device(data);
687 if (ret < 0)
688 return ret;
689
690 /* force update on first occasion */
691 data->next_update = jiffies;
692
693 hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
694 data,
695 &adt7411_chip_info,
696 adt7411_groups);
697 return PTR_ERR_OR_ZERO(hwmon_dev);
698 }
699
700 static const struct i2c_device_id adt7411_id[] = {
701 { "adt7411", 0 },
702 { }
703 };
704 MODULE_DEVICE_TABLE(i2c, adt7411_id);
705
706 static struct i2c_driver adt7411_driver = {
707 .driver = {
708 .name = "adt7411",
709 },
710 .probe = adt7411_probe,
711 .id_table = adt7411_id,
712 .detect = adt7411_detect,
713 .address_list = normal_i2c,
714 .class = I2C_CLASS_HWMON,
715 };
716
717 module_i2c_driver(adt7411_driver);
718
719 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de> and "
720 "Wolfram Sang <w.sang@pengutronix.de>");
721 MODULE_DESCRIPTION("ADT7411 driver");
722 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support