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Merge branch 'topic/ca0106-resume' into topic/ca0106
[mirror_ubuntu-jammy-kernel.git] / drivers / hwmon / adt7473.c
1 /*
2 * A hwmon driver for the Analog Devices ADT7473
3 * Copyright (C) 2007 IBM
4 *
5 * Author: Darrick J. Wong <djwong@us.ibm.com>
6 *
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.
11 *
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.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #include <linux/module.h>
23 #include <linux/jiffies.h>
24 #include <linux/i2c.h>
25 #include <linux/hwmon.h>
26 #include <linux/hwmon-sysfs.h>
27 #include <linux/err.h>
28 #include <linux/mutex.h>
29 #include <linux/delay.h>
30 #include <linux/log2.h>
31
32 /* Addresses to scan */
33 static const unsigned short normal_i2c[] = { 0x2C, 0x2D, 0x2E, I2C_CLIENT_END };
34
35 /* Insmod parameters */
36 I2C_CLIENT_INSMOD_1(adt7473);
37
38 /* ADT7473 registers */
39 #define ADT7473_REG_BASE_ADDR 0x20
40
41 #define ADT7473_REG_VOLT_BASE_ADDR 0x21
42 #define ADT7473_REG_VOLT_MIN_BASE_ADDR 0x46
43
44 #define ADT7473_REG_TEMP_BASE_ADDR 0x25
45 #define ADT7473_REG_TEMP_LIMITS_BASE_ADDR 0x4E
46 #define ADT7473_REG_TEMP_TMIN_BASE_ADDR 0x67
47 #define ADT7473_REG_TEMP_TMAX_BASE_ADDR 0x6A
48
49 #define ADT7473_REG_FAN_BASE_ADDR 0x28
50 #define ADT7473_REG_FAN_MIN_BASE_ADDR 0x54
51
52 #define ADT7473_REG_PWM_BASE_ADDR 0x30
53 #define ADT7473_REG_PWM_MIN_BASE_ADDR 0x64
54 #define ADT7473_REG_PWM_MAX_BASE_ADDR 0x38
55 #define ADT7473_REG_PWM_BHVR_BASE_ADDR 0x5C
56 #define ADT7473_PWM_BHVR_MASK 0xE0
57 #define ADT7473_PWM_BHVR_SHIFT 5
58
59 #define ADT7473_REG_CFG1 0x40
60 #define ADT7473_CFG1_START 0x01
61 #define ADT7473_CFG1_READY 0x04
62 #define ADT7473_REG_CFG2 0x73
63 #define ADT7473_REG_CFG3 0x78
64 #define ADT7473_REG_CFG4 0x7D
65 #define ADT7473_CFG4_MAX_DUTY_AT_OVT 0x08
66 #define ADT7473_REG_CFG5 0x7C
67 #define ADT7473_CFG5_TEMP_TWOS 0x01
68 #define ADT7473_CFG5_TEMP_OFFSET 0x02
69
70 #define ADT7473_REG_DEVICE 0x3D
71 #define ADT7473_VENDOR 0x41
72 #define ADT7473_REG_VENDOR 0x3E
73 #define ADT7473_DEVICE 0x73
74 #define ADT7473_REG_REVISION 0x3F
75 #define ADT7473_REV_68 0x68
76 #define ADT7473_REV_69 0x69
77
78 #define ADT7473_REG_ALARM1 0x41
79 #define ADT7473_VCCP_ALARM 0x02
80 #define ADT7473_VCC_ALARM 0x04
81 #define ADT7473_R1T_ALARM 0x10
82 #define ADT7473_LT_ALARM 0x20
83 #define ADT7473_R2T_ALARM 0x40
84 #define ADT7473_OOL 0x80
85 #define ADT7473_REG_ALARM2 0x42
86 #define ADT7473_OVT_ALARM 0x02
87 #define ADT7473_FAN1_ALARM 0x04
88 #define ADT7473_FAN2_ALARM 0x08
89 #define ADT7473_FAN3_ALARM 0x10
90 #define ADT7473_FAN4_ALARM 0x20
91 #define ADT7473_R1T_SHORT 0x40
92 #define ADT7473_R2T_SHORT 0x80
93
94 #define ALARM2(x) ((x) << 8)
95
96 #define ADT7473_VOLT_COUNT 2
97 #define ADT7473_REG_VOLT(x) (ADT7473_REG_VOLT_BASE_ADDR + (x))
98 #define ADT7473_REG_VOLT_MIN(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + ((x) * 2))
99 #define ADT7473_REG_VOLT_MAX(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + \
100 ((x) * 2) + 1)
101
102 #define ADT7473_TEMP_COUNT 3
103 #define ADT7473_REG_TEMP(x) (ADT7473_REG_TEMP_BASE_ADDR + (x))
104 #define ADT7473_REG_TEMP_MIN(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
105 #define ADT7473_REG_TEMP_MAX(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + \
106 ((x) * 2) + 1)
107 #define ADT7473_REG_TEMP_TMIN(x) (ADT7473_REG_TEMP_TMIN_BASE_ADDR + (x))
108 #define ADT7473_REG_TEMP_TMAX(x) (ADT7473_REG_TEMP_TMAX_BASE_ADDR + (x))
109
110 #define ADT7473_FAN_COUNT 4
111 #define ADT7473_REG_FAN(x) (ADT7473_REG_FAN_BASE_ADDR + ((x) * 2))
112 #define ADT7473_REG_FAN_MIN(x) (ADT7473_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
113
114 #define ADT7473_PWM_COUNT 3
115 #define ADT7473_REG_PWM(x) (ADT7473_REG_PWM_BASE_ADDR + (x))
116 #define ADT7473_REG_PWM_MAX(x) (ADT7473_REG_PWM_MAX_BASE_ADDR + (x))
117 #define ADT7473_REG_PWM_MIN(x) (ADT7473_REG_PWM_MIN_BASE_ADDR + (x))
118 #define ADT7473_REG_PWM_BHVR(x) (ADT7473_REG_PWM_BHVR_BASE_ADDR + (x))
119
120 /* How often do we reread sensors values? (In jiffies) */
121 #define SENSOR_REFRESH_INTERVAL (2 * HZ)
122
123 /* How often do we reread sensor limit values? (In jiffies) */
124 #define LIMIT_REFRESH_INTERVAL (60 * HZ)
125
126 /* datasheet says to divide this number by the fan reading to get fan rpm */
127 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
128 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
129 #define FAN_PERIOD_INVALID 65535
130 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
131
132 #define ROUND_DIV(x, divisor) (((x) + ((divisor) / 2)) / (divisor))
133
134 struct adt7473_data {
135 struct device *hwmon_dev;
136 struct attribute_group attrs;
137 struct mutex lock;
138 char sensors_valid;
139 char limits_valid;
140 unsigned long sensors_last_updated; /* In jiffies */
141 unsigned long limits_last_updated; /* In jiffies */
142
143 u8 volt[ADT7473_VOLT_COUNT];
144 s8 volt_min[ADT7473_VOLT_COUNT];
145 s8 volt_max[ADT7473_VOLT_COUNT];
146
147 s8 temp[ADT7473_TEMP_COUNT];
148 s8 temp_min[ADT7473_TEMP_COUNT];
149 s8 temp_max[ADT7473_TEMP_COUNT];
150 s8 temp_tmin[ADT7473_TEMP_COUNT];
151 /* This is called the !THERM limit in the datasheet */
152 s8 temp_tmax[ADT7473_TEMP_COUNT];
153
154 u16 fan[ADT7473_FAN_COUNT];
155 u16 fan_min[ADT7473_FAN_COUNT];
156
157 u8 pwm[ADT7473_PWM_COUNT];
158 u8 pwm_max[ADT7473_PWM_COUNT];
159 u8 pwm_min[ADT7473_PWM_COUNT];
160 u8 pwm_behavior[ADT7473_PWM_COUNT];
161
162 u8 temp_twos_complement;
163 u8 temp_offset;
164
165 u16 alarm;
166 u8 max_duty_at_overheat;
167 };
168
169 static int adt7473_probe(struct i2c_client *client,
170 const struct i2c_device_id *id);
171 static int adt7473_detect(struct i2c_client *client, int kind,
172 struct i2c_board_info *info);
173 static int adt7473_remove(struct i2c_client *client);
174
175 static const struct i2c_device_id adt7473_id[] = {
176 { "adt7473", adt7473 },
177 { }
178 };
179 MODULE_DEVICE_TABLE(i2c, adt7473_id);
180
181 static struct i2c_driver adt7473_driver = {
182 .class = I2C_CLASS_HWMON,
183 .driver = {
184 .name = "adt7473",
185 },
186 .probe = adt7473_probe,
187 .remove = adt7473_remove,
188 .id_table = adt7473_id,
189 .detect = adt7473_detect,
190 .address_data = &addr_data,
191 };
192
193 /*
194 * 16-bit registers on the ADT7473 are low-byte first. The data sheet says
195 * that the low byte must be read before the high byte.
196 */
197 static inline int adt7473_read_word_data(struct i2c_client *client, u8 reg)
198 {
199 u16 foo;
200 foo = i2c_smbus_read_byte_data(client, reg);
201 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
202 return foo;
203 }
204
205 static inline int adt7473_write_word_data(struct i2c_client *client, u8 reg,
206 u16 value)
207 {
208 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
209 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
210 }
211
212 static void adt7473_init_client(struct i2c_client *client)
213 {
214 int reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG1);
215
216 if (!(reg & ADT7473_CFG1_READY)) {
217 dev_err(&client->dev, "Chip not ready.\n");
218 } else {
219 /* start monitoring */
220 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG1,
221 reg | ADT7473_CFG1_START);
222 }
223 }
224
225 static struct adt7473_data *adt7473_update_device(struct device *dev)
226 {
227 struct i2c_client *client = to_i2c_client(dev);
228 struct adt7473_data *data = i2c_get_clientdata(client);
229 unsigned long local_jiffies = jiffies;
230 u8 cfg;
231 int i;
232
233 mutex_lock(&data->lock);
234 if (time_before(local_jiffies, data->sensors_last_updated +
235 SENSOR_REFRESH_INTERVAL)
236 && data->sensors_valid)
237 goto no_sensor_update;
238
239 for (i = 0; i < ADT7473_VOLT_COUNT; i++)
240 data->volt[i] = i2c_smbus_read_byte_data(client,
241 ADT7473_REG_VOLT(i));
242
243 /* Determine temperature encoding */
244 cfg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG5);
245 data->temp_twos_complement = (cfg & ADT7473_CFG5_TEMP_TWOS);
246
247 /*
248 * What does this do? it implies a variable temperature sensor
249 * offset, but the datasheet doesn't say anything about this bit
250 * and other parts of the datasheet imply that "offset64" mode
251 * means that you shift temp values by -64 if the above bit was set.
252 */
253 data->temp_offset = (cfg & ADT7473_CFG5_TEMP_OFFSET);
254
255 for (i = 0; i < ADT7473_TEMP_COUNT; i++)
256 data->temp[i] = i2c_smbus_read_byte_data(client,
257 ADT7473_REG_TEMP(i));
258
259 for (i = 0; i < ADT7473_FAN_COUNT; i++)
260 data->fan[i] = adt7473_read_word_data(client,
261 ADT7473_REG_FAN(i));
262
263 for (i = 0; i < ADT7473_PWM_COUNT; i++)
264 data->pwm[i] = i2c_smbus_read_byte_data(client,
265 ADT7473_REG_PWM(i));
266
267 data->alarm = i2c_smbus_read_byte_data(client, ADT7473_REG_ALARM1);
268 if (data->alarm & ADT7473_OOL)
269 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
270 ADT7473_REG_ALARM2));
271
272 data->sensors_last_updated = local_jiffies;
273 data->sensors_valid = 1;
274
275 no_sensor_update:
276 if (time_before(local_jiffies, data->limits_last_updated +
277 LIMIT_REFRESH_INTERVAL)
278 && data->limits_valid)
279 goto out;
280
281 for (i = 0; i < ADT7473_VOLT_COUNT; i++) {
282 data->volt_min[i] = i2c_smbus_read_byte_data(client,
283 ADT7473_REG_VOLT_MIN(i));
284 data->volt_max[i] = i2c_smbus_read_byte_data(client,
285 ADT7473_REG_VOLT_MAX(i));
286 }
287
288 for (i = 0; i < ADT7473_TEMP_COUNT; i++) {
289 data->temp_min[i] = i2c_smbus_read_byte_data(client,
290 ADT7473_REG_TEMP_MIN(i));
291 data->temp_max[i] = i2c_smbus_read_byte_data(client,
292 ADT7473_REG_TEMP_MAX(i));
293 data->temp_tmin[i] = i2c_smbus_read_byte_data(client,
294 ADT7473_REG_TEMP_TMIN(i));
295 data->temp_tmax[i] = i2c_smbus_read_byte_data(client,
296 ADT7473_REG_TEMP_TMAX(i));
297 }
298
299 for (i = 0; i < ADT7473_FAN_COUNT; i++)
300 data->fan_min[i] = adt7473_read_word_data(client,
301 ADT7473_REG_FAN_MIN(i));
302
303 for (i = 0; i < ADT7473_PWM_COUNT; i++) {
304 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
305 ADT7473_REG_PWM_MAX(i));
306 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
307 ADT7473_REG_PWM_MIN(i));
308 data->pwm_behavior[i] = i2c_smbus_read_byte_data(client,
309 ADT7473_REG_PWM_BHVR(i));
310 }
311
312 i = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
313 data->max_duty_at_overheat = !!(i & ADT7473_CFG4_MAX_DUTY_AT_OVT);
314
315 data->limits_last_updated = local_jiffies;
316 data->limits_valid = 1;
317
318 out:
319 mutex_unlock(&data->lock);
320 return data;
321 }
322
323 /*
324 * Conversions
325 */
326
327 /* IN are scaled acording to built-in resistors */
328 static const int adt7473_scaling[] = { /* .001 Volts */
329 2250, 3300
330 };
331 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from))
332
333 static int decode_volt(int volt_index, u8 raw)
334 {
335 return SCALE(raw, 192, adt7473_scaling[volt_index]);
336 }
337
338 static u8 encode_volt(int volt_index, int cooked)
339 {
340 int raw = SCALE(cooked, adt7473_scaling[volt_index], 192);
341 return SENSORS_LIMIT(raw, 0, 255);
342 }
343
344 static ssize_t show_volt_min(struct device *dev,
345 struct device_attribute *devattr,
346 char *buf)
347 {
348 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
349 struct adt7473_data *data = adt7473_update_device(dev);
350 return sprintf(buf, "%d\n",
351 decode_volt(attr->index, data->volt_min[attr->index]));
352 }
353
354 static ssize_t set_volt_min(struct device *dev,
355 struct device_attribute *devattr,
356 const char *buf,
357 size_t count)
358 {
359 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
360 struct i2c_client *client = to_i2c_client(dev);
361 struct adt7473_data *data = i2c_get_clientdata(client);
362 long volt;
363
364 if (strict_strtol(buf, 10, &volt))
365 return -EINVAL;
366
367 volt = encode_volt(attr->index, volt);
368
369 mutex_lock(&data->lock);
370 data->volt_min[attr->index] = volt;
371 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index),
372 volt);
373 mutex_unlock(&data->lock);
374
375 return count;
376 }
377
378 static ssize_t show_volt_max(struct device *dev,
379 struct device_attribute *devattr,
380 char *buf)
381 {
382 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
383 struct adt7473_data *data = adt7473_update_device(dev);
384 return sprintf(buf, "%d\n",
385 decode_volt(attr->index, data->volt_max[attr->index]));
386 }
387
388 static ssize_t set_volt_max(struct device *dev,
389 struct device_attribute *devattr,
390 const char *buf,
391 size_t count)
392 {
393 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
394 struct i2c_client *client = to_i2c_client(dev);
395 struct adt7473_data *data = i2c_get_clientdata(client);
396 long volt;
397
398 if (strict_strtol(buf, 10, &volt))
399 return -EINVAL;
400
401 volt = encode_volt(attr->index, volt);
402
403 mutex_lock(&data->lock);
404 data->volt_max[attr->index] = volt;
405 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index),
406 volt);
407 mutex_unlock(&data->lock);
408
409 return count;
410 }
411
412 static ssize_t show_volt(struct device *dev, struct device_attribute *devattr,
413 char *buf)
414 {
415 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
416 struct adt7473_data *data = adt7473_update_device(dev);
417
418 return sprintf(buf, "%d\n",
419 decode_volt(attr->index, data->volt[attr->index]));
420 }
421
422 /*
423 * This chip can report temperature data either as a two's complement
424 * number in the range -128 to 127, or as an unsigned number that must
425 * be offset by 64.
426 */
427 static int decode_temp(u8 twos_complement, u8 raw)
428 {
429 return twos_complement ? (s8)raw : raw - 64;
430 }
431
432 static u8 encode_temp(u8 twos_complement, int cooked)
433 {
434 u8 ret = twos_complement ? cooked & 0xFF : cooked + 64;
435 return SENSORS_LIMIT(ret, 0, 255);
436 }
437
438 static ssize_t show_temp_min(struct device *dev,
439 struct device_attribute *devattr,
440 char *buf)
441 {
442 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
443 struct adt7473_data *data = adt7473_update_device(dev);
444 return sprintf(buf, "%d\n", 1000 * decode_temp(
445 data->temp_twos_complement,
446 data->temp_min[attr->index]));
447 }
448
449 static ssize_t set_temp_min(struct device *dev,
450 struct device_attribute *devattr,
451 const char *buf,
452 size_t count)
453 {
454 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
455 struct i2c_client *client = to_i2c_client(dev);
456 struct adt7473_data *data = i2c_get_clientdata(client);
457 long temp;
458
459 if (strict_strtol(buf, 10, &temp))
460 return -EINVAL;
461
462 temp = ROUND_DIV(temp, 1000);
463 temp = encode_temp(data->temp_twos_complement, temp);
464
465 mutex_lock(&data->lock);
466 data->temp_min[attr->index] = temp;
467 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index),
468 temp);
469 mutex_unlock(&data->lock);
470
471 return count;
472 }
473
474 static ssize_t show_temp_max(struct device *dev,
475 struct device_attribute *devattr,
476 char *buf)
477 {
478 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
479 struct adt7473_data *data = adt7473_update_device(dev);
480 return sprintf(buf, "%d\n", 1000 * decode_temp(
481 data->temp_twos_complement,
482 data->temp_max[attr->index]));
483 }
484
485 static ssize_t set_temp_max(struct device *dev,
486 struct device_attribute *devattr,
487 const char *buf,
488 size_t count)
489 {
490 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
491 struct i2c_client *client = to_i2c_client(dev);
492 struct adt7473_data *data = i2c_get_clientdata(client);
493 long temp;
494
495 if (strict_strtol(buf, 10, &temp))
496 return -EINVAL;
497
498 temp = ROUND_DIV(temp, 1000);
499 temp = encode_temp(data->temp_twos_complement, temp);
500
501 mutex_lock(&data->lock);
502 data->temp_max[attr->index] = temp;
503 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
504 temp);
505 mutex_unlock(&data->lock);
506
507 return count;
508 }
509
510 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
511 char *buf)
512 {
513 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
514 struct adt7473_data *data = adt7473_update_device(dev);
515 return sprintf(buf, "%d\n", 1000 * decode_temp(
516 data->temp_twos_complement,
517 data->temp[attr->index]));
518 }
519
520 static ssize_t show_fan_min(struct device *dev,
521 struct device_attribute *devattr,
522 char *buf)
523 {
524 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
525 struct adt7473_data *data = adt7473_update_device(dev);
526
527 if (FAN_DATA_VALID(data->fan_min[attr->index]))
528 return sprintf(buf, "%d\n",
529 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
530 else
531 return sprintf(buf, "0\n");
532 }
533
534 static ssize_t set_fan_min(struct device *dev,
535 struct device_attribute *devattr,
536 const char *buf, size_t count)
537 {
538 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
539 struct i2c_client *client = to_i2c_client(dev);
540 struct adt7473_data *data = i2c_get_clientdata(client);
541 long temp;
542
543 if (strict_strtol(buf, 10, &temp) || !temp)
544 return -EINVAL;
545
546 temp = FAN_RPM_TO_PERIOD(temp);
547 temp = SENSORS_LIMIT(temp, 1, 65534);
548
549 mutex_lock(&data->lock);
550 data->fan_min[attr->index] = temp;
551 adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
552 mutex_unlock(&data->lock);
553
554 return count;
555 }
556
557 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
558 char *buf)
559 {
560 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
561 struct adt7473_data *data = adt7473_update_device(dev);
562
563 if (FAN_DATA_VALID(data->fan[attr->index]))
564 return sprintf(buf, "%d\n",
565 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
566 else
567 return sprintf(buf, "0\n");
568 }
569
570 static ssize_t show_max_duty_at_crit(struct device *dev,
571 struct device_attribute *devattr,
572 char *buf)
573 {
574 struct adt7473_data *data = adt7473_update_device(dev);
575 return sprintf(buf, "%d\n", data->max_duty_at_overheat);
576 }
577
578 static ssize_t set_max_duty_at_crit(struct device *dev,
579 struct device_attribute *devattr,
580 const char *buf,
581 size_t count)
582 {
583 u8 reg;
584 struct i2c_client *client = to_i2c_client(dev);
585 struct adt7473_data *data = i2c_get_clientdata(client);
586 long temp;
587
588 if (strict_strtol(buf, 10, &temp))
589 return -EINVAL;
590
591 mutex_lock(&data->lock);
592 data->max_duty_at_overheat = !!temp;
593 reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
594 if (temp)
595 reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
596 else
597 reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
598 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
599 mutex_unlock(&data->lock);
600
601 return count;
602 }
603
604 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
605 char *buf)
606 {
607 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
608 struct adt7473_data *data = adt7473_update_device(dev);
609 return sprintf(buf, "%d\n", data->pwm[attr->index]);
610 }
611
612 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
613 const char *buf, size_t count)
614 {
615 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
616 struct i2c_client *client = to_i2c_client(dev);
617 struct adt7473_data *data = i2c_get_clientdata(client);
618 long temp;
619
620 if (strict_strtol(buf, 10, &temp))
621 return -EINVAL;
622
623 temp = SENSORS_LIMIT(temp, 0, 255);
624
625 mutex_lock(&data->lock);
626 data->pwm[attr->index] = temp;
627 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
628 mutex_unlock(&data->lock);
629
630 return count;
631 }
632
633 static ssize_t show_pwm_max(struct device *dev,
634 struct device_attribute *devattr,
635 char *buf)
636 {
637 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
638 struct adt7473_data *data = adt7473_update_device(dev);
639 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
640 }
641
642 static ssize_t set_pwm_max(struct device *dev,
643 struct device_attribute *devattr,
644 const char *buf,
645 size_t count)
646 {
647 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
648 struct i2c_client *client = to_i2c_client(dev);
649 struct adt7473_data *data = i2c_get_clientdata(client);
650 long temp;
651
652 if (strict_strtol(buf, 10, &temp))
653 return -EINVAL;
654
655 temp = SENSORS_LIMIT(temp, 0, 255);
656
657 mutex_lock(&data->lock);
658 data->pwm_max[attr->index] = temp;
659 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
660 temp);
661 mutex_unlock(&data->lock);
662
663 return count;
664 }
665
666 static ssize_t show_pwm_min(struct device *dev,
667 struct device_attribute *devattr,
668 char *buf)
669 {
670 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
671 struct adt7473_data *data = adt7473_update_device(dev);
672 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
673 }
674
675 static ssize_t set_pwm_min(struct device *dev,
676 struct device_attribute *devattr,
677 const char *buf,
678 size_t count)
679 {
680 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
681 struct i2c_client *client = to_i2c_client(dev);
682 struct adt7473_data *data = i2c_get_clientdata(client);
683 long temp;
684
685 if (strict_strtol(buf, 10, &temp))
686 return -EINVAL;
687
688 temp = SENSORS_LIMIT(temp, 0, 255);
689
690 mutex_lock(&data->lock);
691 data->pwm_min[attr->index] = temp;
692 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
693 temp);
694 mutex_unlock(&data->lock);
695
696 return count;
697 }
698
699 static ssize_t show_temp_tmax(struct device *dev,
700 struct device_attribute *devattr,
701 char *buf)
702 {
703 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
704 struct adt7473_data *data = adt7473_update_device(dev);
705 return sprintf(buf, "%d\n", 1000 * decode_temp(
706 data->temp_twos_complement,
707 data->temp_tmax[attr->index]));
708 }
709
710 static ssize_t set_temp_tmax(struct device *dev,
711 struct device_attribute *devattr,
712 const char *buf,
713 size_t count)
714 {
715 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
716 struct i2c_client *client = to_i2c_client(dev);
717 struct adt7473_data *data = i2c_get_clientdata(client);
718 long temp;
719
720 if (strict_strtol(buf, 10, &temp))
721 return -EINVAL;
722
723 temp = ROUND_DIV(temp, 1000);
724 temp = encode_temp(data->temp_twos_complement, temp);
725
726 mutex_lock(&data->lock);
727 data->temp_tmax[attr->index] = temp;
728 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index),
729 temp);
730 mutex_unlock(&data->lock);
731
732 return count;
733 }
734
735 static ssize_t show_temp_tmin(struct device *dev,
736 struct device_attribute *devattr,
737 char *buf)
738 {
739 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
740 struct adt7473_data *data = adt7473_update_device(dev);
741 return sprintf(buf, "%d\n", 1000 * decode_temp(
742 data->temp_twos_complement,
743 data->temp_tmin[attr->index]));
744 }
745
746 static ssize_t set_temp_tmin(struct device *dev,
747 struct device_attribute *devattr,
748 const char *buf,
749 size_t count)
750 {
751 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
752 struct i2c_client *client = to_i2c_client(dev);
753 struct adt7473_data *data = i2c_get_clientdata(client);
754 long temp;
755
756 if (strict_strtol(buf, 10, &temp))
757 return -EINVAL;
758
759 temp = ROUND_DIV(temp, 1000);
760 temp = encode_temp(data->temp_twos_complement, temp);
761
762 mutex_lock(&data->lock);
763 data->temp_tmin[attr->index] = temp;
764 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
765 temp);
766 mutex_unlock(&data->lock);
767
768 return count;
769 }
770
771 static ssize_t show_pwm_enable(struct device *dev,
772 struct device_attribute *devattr,
773 char *buf)
774 {
775 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
776 struct adt7473_data *data = adt7473_update_device(dev);
777
778 switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
779 case 3:
780 return sprintf(buf, "0\n");
781 case 7:
782 return sprintf(buf, "1\n");
783 default:
784 return sprintf(buf, "2\n");
785 }
786 }
787
788 static ssize_t set_pwm_enable(struct device *dev,
789 struct device_attribute *devattr,
790 const char *buf,
791 size_t count)
792 {
793 u8 reg;
794 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
795 struct i2c_client *client = to_i2c_client(dev);
796 struct adt7473_data *data = i2c_get_clientdata(client);
797 long temp;
798
799 if (strict_strtol(buf, 10, &temp))
800 return -EINVAL;
801
802 switch (temp) {
803 case 0:
804 temp = 3;
805 break;
806 case 1:
807 temp = 7;
808 break;
809 case 2:
810 /* Enter automatic mode with fans off */
811 temp = 4;
812 break;
813 default:
814 return -EINVAL;
815 }
816
817 mutex_lock(&data->lock);
818 reg = i2c_smbus_read_byte_data(client,
819 ADT7473_REG_PWM_BHVR(attr->index));
820 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
821 (reg & ~ADT7473_PWM_BHVR_MASK);
822 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
823 reg);
824 data->pwm_behavior[attr->index] = reg;
825 mutex_unlock(&data->lock);
826
827 return count;
828 }
829
830 static ssize_t show_pwm_auto_temp(struct device *dev,
831 struct device_attribute *devattr,
832 char *buf)
833 {
834 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
835 struct adt7473_data *data = adt7473_update_device(dev);
836 int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
837
838 switch (bhvr) {
839 case 3:
840 case 4:
841 case 7:
842 return sprintf(buf, "0\n");
843 case 0:
844 case 1:
845 case 5:
846 case 6:
847 return sprintf(buf, "%d\n", bhvr + 1);
848 case 2:
849 return sprintf(buf, "4\n");
850 }
851 /* shouldn't ever get here */
852 BUG();
853 }
854
855 static ssize_t set_pwm_auto_temp(struct device *dev,
856 struct device_attribute *devattr,
857 const char *buf,
858 size_t count)
859 {
860 u8 reg;
861 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
862 struct i2c_client *client = to_i2c_client(dev);
863 struct adt7473_data *data = i2c_get_clientdata(client);
864 long temp;
865
866 if (strict_strtol(buf, 10, &temp))
867 return -EINVAL;
868
869 switch (temp) {
870 case 1:
871 case 2:
872 case 6:
873 case 7:
874 temp--;
875 break;
876 case 0:
877 temp = 4;
878 break;
879 default:
880 return -EINVAL;
881 }
882
883 mutex_lock(&data->lock);
884 reg = i2c_smbus_read_byte_data(client,
885 ADT7473_REG_PWM_BHVR(attr->index));
886 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
887 (reg & ~ADT7473_PWM_BHVR_MASK);
888 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
889 reg);
890 data->pwm_behavior[attr->index] = reg;
891 mutex_unlock(&data->lock);
892
893 return count;
894 }
895
896 static ssize_t show_alarm(struct device *dev,
897 struct device_attribute *devattr,
898 char *buf)
899 {
900 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
901 struct adt7473_data *data = adt7473_update_device(dev);
902
903 if (data->alarm & attr->index)
904 return sprintf(buf, "1\n");
905 else
906 return sprintf(buf, "0\n");
907 }
908
909
910 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
911 set_volt_max, 0);
912 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
913 set_volt_max, 1);
914
915 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
916 set_volt_min, 0);
917 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
918 set_volt_min, 1);
919
920 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
921 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
922
923 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
924 ADT7473_VCCP_ALARM);
925 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
926 ADT7473_VCC_ALARM);
927
928 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
929 set_temp_max, 0);
930 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
931 set_temp_max, 1);
932 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
933 set_temp_max, 2);
934
935 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
936 set_temp_min, 0);
937 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
938 set_temp_min, 1);
939 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
940 set_temp_min, 2);
941
942 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
943 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
944 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
945
946 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
947 ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
948 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
949 ADT7473_LT_ALARM);
950 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
951 ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
952
953 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
954 set_fan_min, 0);
955 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
956 set_fan_min, 1);
957 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
958 set_fan_min, 2);
959 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
960 set_fan_min, 3);
961
962 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
963 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
964 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
965 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
966
967 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
968 ALARM2(ADT7473_FAN1_ALARM));
969 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
970 ALARM2(ADT7473_FAN2_ALARM));
971 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
972 ALARM2(ADT7473_FAN3_ALARM));
973 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
974 ALARM2(ADT7473_FAN4_ALARM));
975
976 static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
977 show_max_duty_at_crit, set_max_duty_at_crit, 0);
978
979 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
980 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
981 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
982
983 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
984 show_pwm_min, set_pwm_min, 0);
985 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
986 show_pwm_min, set_pwm_min, 1);
987 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
988 show_pwm_min, set_pwm_min, 2);
989
990 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
991 show_pwm_max, set_pwm_max, 0);
992 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
993 show_pwm_max, set_pwm_max, 1);
994 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
995 show_pwm_max, set_pwm_max, 2);
996
997 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
998 show_temp_tmin, set_temp_tmin, 0);
999 static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
1000 show_temp_tmin, set_temp_tmin, 1);
1001 static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
1002 show_temp_tmin, set_temp_tmin, 2);
1003
1004 static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
1005 show_temp_tmax, set_temp_tmax, 0);
1006 static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
1007 show_temp_tmax, set_temp_tmax, 1);
1008 static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
1009 show_temp_tmax, set_temp_tmax, 2);
1010
1011 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
1012 set_pwm_enable, 0);
1013 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
1014 set_pwm_enable, 1);
1015 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
1016 set_pwm_enable, 2);
1017
1018 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
1019 show_pwm_auto_temp, set_pwm_auto_temp, 0);
1020 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
1021 show_pwm_auto_temp, set_pwm_auto_temp, 1);
1022 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
1023 show_pwm_auto_temp, set_pwm_auto_temp, 2);
1024
1025 static struct attribute *adt7473_attr[] =
1026 {
1027 &sensor_dev_attr_in1_max.dev_attr.attr,
1028 &sensor_dev_attr_in2_max.dev_attr.attr,
1029 &sensor_dev_attr_in1_min.dev_attr.attr,
1030 &sensor_dev_attr_in2_min.dev_attr.attr,
1031 &sensor_dev_attr_in1_input.dev_attr.attr,
1032 &sensor_dev_attr_in2_input.dev_attr.attr,
1033 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1034 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1035
1036 &sensor_dev_attr_temp1_max.dev_attr.attr,
1037 &sensor_dev_attr_temp2_max.dev_attr.attr,
1038 &sensor_dev_attr_temp3_max.dev_attr.attr,
1039 &sensor_dev_attr_temp1_min.dev_attr.attr,
1040 &sensor_dev_attr_temp2_min.dev_attr.attr,
1041 &sensor_dev_attr_temp3_min.dev_attr.attr,
1042 &sensor_dev_attr_temp1_input.dev_attr.attr,
1043 &sensor_dev_attr_temp2_input.dev_attr.attr,
1044 &sensor_dev_attr_temp3_input.dev_attr.attr,
1045 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1046 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1047 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1048 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1049 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1050 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1051 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1052 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1053 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1054
1055 &sensor_dev_attr_fan1_min.dev_attr.attr,
1056 &sensor_dev_attr_fan2_min.dev_attr.attr,
1057 &sensor_dev_attr_fan3_min.dev_attr.attr,
1058 &sensor_dev_attr_fan4_min.dev_attr.attr,
1059 &sensor_dev_attr_fan1_input.dev_attr.attr,
1060 &sensor_dev_attr_fan2_input.dev_attr.attr,
1061 &sensor_dev_attr_fan3_input.dev_attr.attr,
1062 &sensor_dev_attr_fan4_input.dev_attr.attr,
1063 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1064 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1065 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1066 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1067
1068 &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
1069
1070 &sensor_dev_attr_pwm1.dev_attr.attr,
1071 &sensor_dev_attr_pwm2.dev_attr.attr,
1072 &sensor_dev_attr_pwm3.dev_attr.attr,
1073 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1074 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1075 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1076 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1077 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1078 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1079
1080 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1081 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1082 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1083 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1084 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1085 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1086
1087 NULL
1088 };
1089
1090 /* Return 0 if detection is successful, -ENODEV otherwise */
1091 static int adt7473_detect(struct i2c_client *client, int kind,
1092 struct i2c_board_info *info)
1093 {
1094 struct i2c_adapter *adapter = client->adapter;
1095
1096 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1097 return -ENODEV;
1098
1099 if (kind <= 0) {
1100 int vendor, device, revision;
1101
1102 vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
1103 if (vendor != ADT7473_VENDOR)
1104 return -ENODEV;
1105
1106 device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
1107 if (device != ADT7473_DEVICE)
1108 return -ENODEV;
1109
1110 revision = i2c_smbus_read_byte_data(client,
1111 ADT7473_REG_REVISION);
1112 if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69)
1113 return -ENODEV;
1114 } else
1115 dev_dbg(&adapter->dev, "detection forced\n");
1116
1117 strlcpy(info->type, "adt7473", I2C_NAME_SIZE);
1118
1119 return 0;
1120 }
1121
1122 static int adt7473_probe(struct i2c_client *client,
1123 const struct i2c_device_id *id)
1124 {
1125 struct adt7473_data *data;
1126 int err;
1127
1128 data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
1129 if (!data) {
1130 err = -ENOMEM;
1131 goto exit;
1132 }
1133
1134 i2c_set_clientdata(client, data);
1135 mutex_init(&data->lock);
1136
1137 dev_info(&client->dev, "%s chip found\n", client->name);
1138
1139 /* Initialize the ADT7473 chip */
1140 adt7473_init_client(client);
1141
1142 /* Register sysfs hooks */
1143 data->attrs.attrs = adt7473_attr;
1144 err = sysfs_create_group(&client->dev.kobj, &data->attrs);
1145 if (err)
1146 goto exit_free;
1147
1148 data->hwmon_dev = hwmon_device_register(&client->dev);
1149 if (IS_ERR(data->hwmon_dev)) {
1150 err = PTR_ERR(data->hwmon_dev);
1151 goto exit_remove;
1152 }
1153
1154 return 0;
1155
1156 exit_remove:
1157 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1158 exit_free:
1159 kfree(data);
1160 exit:
1161 return err;
1162 }
1163
1164 static int adt7473_remove(struct i2c_client *client)
1165 {
1166 struct adt7473_data *data = i2c_get_clientdata(client);
1167
1168 hwmon_device_unregister(data->hwmon_dev);
1169 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1170 kfree(data);
1171 return 0;
1172 }
1173
1174 static int __init adt7473_init(void)
1175 {
1176 return i2c_add_driver(&adt7473_driver);
1177 }
1178
1179 static void __exit adt7473_exit(void)
1180 {
1181 i2c_del_driver(&adt7473_driver);
1182 }
1183
1184 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1185 MODULE_DESCRIPTION("ADT7473 driver");
1186 MODULE_LICENSE("GPL");
1187
1188 module_init(adt7473_init);
1189 module_exit(adt7473_exit);
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