projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6
[deliverable/linux.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 struct adt7473_data {
133 struct device *hwmon_dev;
134 struct attribute_group attrs;
135 struct mutex lock;
136 char sensors_valid;
137 char limits_valid;
138 unsigned long sensors_last_updated; /* In jiffies */
139 unsigned long limits_last_updated; /* In jiffies */
140
141 u8 volt[ADT7473_VOLT_COUNT];
142 s8 volt_min[ADT7473_VOLT_COUNT];
143 s8 volt_max[ADT7473_VOLT_COUNT];
144
145 s8 temp[ADT7473_TEMP_COUNT];
146 s8 temp_min[ADT7473_TEMP_COUNT];
147 s8 temp_max[ADT7473_TEMP_COUNT];
148 s8 temp_tmin[ADT7473_TEMP_COUNT];
149 /* This is called the !THERM limit in the datasheet */
150 s8 temp_tmax[ADT7473_TEMP_COUNT];
151
152 u16 fan[ADT7473_FAN_COUNT];
153 u16 fan_min[ADT7473_FAN_COUNT];
154
155 u8 pwm[ADT7473_PWM_COUNT];
156 u8 pwm_max[ADT7473_PWM_COUNT];
157 u8 pwm_min[ADT7473_PWM_COUNT];
158 u8 pwm_behavior[ADT7473_PWM_COUNT];
159
160 u8 temp_twos_complement;
161 u8 temp_offset;
162
163 u16 alarm;
164 u8 max_duty_at_overheat;
165 };
166
167 static int adt7473_probe(struct i2c_client *client,
168 const struct i2c_device_id *id);
169 static int adt7473_detect(struct i2c_client *client, int kind,
170 struct i2c_board_info *info);
171 static int adt7473_remove(struct i2c_client *client);
172
173 static const struct i2c_device_id adt7473_id[] = {
174 { "adt7473", adt7473 },
175 { }
176 };
177 MODULE_DEVICE_TABLE(i2c, adt7473_id);
178
179 static struct i2c_driver adt7473_driver = {
180 .class = I2C_CLASS_HWMON,
181 .driver = {
182 .name = "adt7473",
183 },
184 .probe = adt7473_probe,
185 .remove = adt7473_remove,
186 .id_table = adt7473_id,
187 .detect = adt7473_detect,
188 .address_data = &addr_data,
189 };
190
191 /*
192 * 16-bit registers on the ADT7473 are low-byte first. The data sheet says
193 * that the low byte must be read before the high byte.
194 */
195 static inline int adt7473_read_word_data(struct i2c_client *client, u8 reg)
196 {
197 u16 foo;
198 foo = i2c_smbus_read_byte_data(client, reg);
199 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
200 return foo;
201 }
202
203 static inline int adt7473_write_word_data(struct i2c_client *client, u8 reg,
204 u16 value)
205 {
206 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
207 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
208 }
209
210 static void adt7473_init_client(struct i2c_client *client)
211 {
212 int reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG1);
213
214 if (!(reg & ADT7473_CFG1_READY)) {
215 dev_err(&client->dev, "Chip not ready.\n");
216 } else {
217 /* start monitoring */
218 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG1,
219 reg | ADT7473_CFG1_START);
220 }
221 }
222
223 static struct adt7473_data *adt7473_update_device(struct device *dev)
224 {
225 struct i2c_client *client = to_i2c_client(dev);
226 struct adt7473_data *data = i2c_get_clientdata(client);
227 unsigned long local_jiffies = jiffies;
228 u8 cfg;
229 int i;
230
231 mutex_lock(&data->lock);
232 if (time_before(local_jiffies, data->sensors_last_updated +
233 SENSOR_REFRESH_INTERVAL)
234 && data->sensors_valid)
235 goto no_sensor_update;
236
237 for (i = 0; i < ADT7473_VOLT_COUNT; i++)
238 data->volt[i] = i2c_smbus_read_byte_data(client,
239 ADT7473_REG_VOLT(i));
240
241 /* Determine temperature encoding */
242 cfg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG5);
243 data->temp_twos_complement = (cfg & ADT7473_CFG5_TEMP_TWOS);
244
245 /*
246 * What does this do? it implies a variable temperature sensor
247 * offset, but the datasheet doesn't say anything about this bit
248 * and other parts of the datasheet imply that "offset64" mode
249 * means that you shift temp values by -64 if the above bit was set.
250 */
251 data->temp_offset = (cfg & ADT7473_CFG5_TEMP_OFFSET);
252
253 for (i = 0; i < ADT7473_TEMP_COUNT; i++)
254 data->temp[i] = i2c_smbus_read_byte_data(client,
255 ADT7473_REG_TEMP(i));
256
257 for (i = 0; i < ADT7473_FAN_COUNT; i++)
258 data->fan[i] = adt7473_read_word_data(client,
259 ADT7473_REG_FAN(i));
260
261 for (i = 0; i < ADT7473_PWM_COUNT; i++)
262 data->pwm[i] = i2c_smbus_read_byte_data(client,
263 ADT7473_REG_PWM(i));
264
265 data->alarm = i2c_smbus_read_byte_data(client, ADT7473_REG_ALARM1);
266 if (data->alarm & ADT7473_OOL)
267 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
268 ADT7473_REG_ALARM2));
269
270 data->sensors_last_updated = local_jiffies;
271 data->sensors_valid = 1;
272
273 no_sensor_update:
274 if (time_before(local_jiffies, data->limits_last_updated +
275 LIMIT_REFRESH_INTERVAL)
276 && data->limits_valid)
277 goto out;
278
279 for (i = 0; i < ADT7473_VOLT_COUNT; i++) {
280 data->volt_min[i] = i2c_smbus_read_byte_data(client,
281 ADT7473_REG_VOLT_MIN(i));
282 data->volt_max[i] = i2c_smbus_read_byte_data(client,
283 ADT7473_REG_VOLT_MAX(i));
284 }
285
286 for (i = 0; i < ADT7473_TEMP_COUNT; i++) {
287 data->temp_min[i] = i2c_smbus_read_byte_data(client,
288 ADT7473_REG_TEMP_MIN(i));
289 data->temp_max[i] = i2c_smbus_read_byte_data(client,
290 ADT7473_REG_TEMP_MAX(i));
291 data->temp_tmin[i] = i2c_smbus_read_byte_data(client,
292 ADT7473_REG_TEMP_TMIN(i));
293 data->temp_tmax[i] = i2c_smbus_read_byte_data(client,
294 ADT7473_REG_TEMP_TMAX(i));
295 }
296
297 for (i = 0; i < ADT7473_FAN_COUNT; i++)
298 data->fan_min[i] = adt7473_read_word_data(client,
299 ADT7473_REG_FAN_MIN(i));
300
301 for (i = 0; i < ADT7473_PWM_COUNT; i++) {
302 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
303 ADT7473_REG_PWM_MAX(i));
304 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
305 ADT7473_REG_PWM_MIN(i));
306 data->pwm_behavior[i] = i2c_smbus_read_byte_data(client,
307 ADT7473_REG_PWM_BHVR(i));
308 }
309
310 i = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
311 data->max_duty_at_overheat = !!(i & ADT7473_CFG4_MAX_DUTY_AT_OVT);
312
313 data->limits_last_updated = local_jiffies;
314 data->limits_valid = 1;
315
316 out:
317 mutex_unlock(&data->lock);
318 return data;
319 }
320
321 /*
322 * Conversions
323 */
324
325 /* IN are scaled acording to built-in resistors */
326 static const int adt7473_scaling[] = { /* .001 Volts */
327 2250, 3300
328 };
329 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from))
330
331 static int decode_volt(int volt_index, u8 raw)
332 {
333 return SCALE(raw, 192, adt7473_scaling[volt_index]);
334 }
335
336 static u8 encode_volt(int volt_index, int cooked)
337 {
338 int raw = SCALE(cooked, adt7473_scaling[volt_index], 192);
339 return SENSORS_LIMIT(raw, 0, 255);
340 }
341
342 static ssize_t show_volt_min(struct device *dev,
343 struct device_attribute *devattr,
344 char *buf)
345 {
346 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
347 struct adt7473_data *data = adt7473_update_device(dev);
348 return sprintf(buf, "%d\n",
349 decode_volt(attr->index, data->volt_min[attr->index]));
350 }
351
352 static ssize_t set_volt_min(struct device *dev,
353 struct device_attribute *devattr,
354 const char *buf,
355 size_t count)
356 {
357 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
358 struct i2c_client *client = to_i2c_client(dev);
359 struct adt7473_data *data = i2c_get_clientdata(client);
360 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
361
362 mutex_lock(&data->lock);
363 data->volt_min[attr->index] = volt;
364 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index),
365 volt);
366 mutex_unlock(&data->lock);
367
368 return count;
369 }
370
371 static ssize_t show_volt_max(struct device *dev,
372 struct device_attribute *devattr,
373 char *buf)
374 {
375 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
376 struct adt7473_data *data = adt7473_update_device(dev);
377 return sprintf(buf, "%d\n",
378 decode_volt(attr->index, data->volt_max[attr->index]));
379 }
380
381 static ssize_t set_volt_max(struct device *dev,
382 struct device_attribute *devattr,
383 const char *buf,
384 size_t count)
385 {
386 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
387 struct i2c_client *client = to_i2c_client(dev);
388 struct adt7473_data *data = i2c_get_clientdata(client);
389 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
390
391 mutex_lock(&data->lock);
392 data->volt_max[attr->index] = volt;
393 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index),
394 volt);
395 mutex_unlock(&data->lock);
396
397 return count;
398 }
399
400 static ssize_t show_volt(struct device *dev, struct device_attribute *devattr,
401 char *buf)
402 {
403 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
404 struct adt7473_data *data = adt7473_update_device(dev);
405
406 return sprintf(buf, "%d\n",
407 decode_volt(attr->index, data->volt[attr->index]));
408 }
409
410 /*
411 * This chip can report temperature data either as a two's complement
412 * number in the range -128 to 127, or as an unsigned number that must
413 * be offset by 64.
414 */
415 static int decode_temp(u8 twos_complement, u8 raw)
416 {
417 return twos_complement ? (s8)raw : raw - 64;
418 }
419
420 static u8 encode_temp(u8 twos_complement, int cooked)
421 {
422 return twos_complement ? cooked & 0xFF : cooked + 64;
423 }
424
425 static ssize_t show_temp_min(struct device *dev,
426 struct device_attribute *devattr,
427 char *buf)
428 {
429 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
430 struct adt7473_data *data = adt7473_update_device(dev);
431 return sprintf(buf, "%d\n", 1000 * decode_temp(
432 data->temp_twos_complement,
433 data->temp_min[attr->index]));
434 }
435
436 static ssize_t set_temp_min(struct device *dev,
437 struct device_attribute *devattr,
438 const char *buf,
439 size_t count)
440 {
441 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
442 struct i2c_client *client = to_i2c_client(dev);
443 struct adt7473_data *data = i2c_get_clientdata(client);
444 int temp = simple_strtol(buf, NULL, 10) / 1000;
445 temp = encode_temp(data->temp_twos_complement, temp);
446
447 mutex_lock(&data->lock);
448 data->temp_min[attr->index] = temp;
449 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index),
450 temp);
451 mutex_unlock(&data->lock);
452
453 return count;
454 }
455
456 static ssize_t show_temp_max(struct device *dev,
457 struct device_attribute *devattr,
458 char *buf)
459 {
460 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
461 struct adt7473_data *data = adt7473_update_device(dev);
462 return sprintf(buf, "%d\n", 1000 * decode_temp(
463 data->temp_twos_complement,
464 data->temp_max[attr->index]));
465 }
466
467 static ssize_t set_temp_max(struct device *dev,
468 struct device_attribute *devattr,
469 const char *buf,
470 size_t count)
471 {
472 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
473 struct i2c_client *client = to_i2c_client(dev);
474 struct adt7473_data *data = i2c_get_clientdata(client);
475 int temp = simple_strtol(buf, NULL, 10) / 1000;
476 temp = encode_temp(data->temp_twos_complement, temp);
477
478 mutex_lock(&data->lock);
479 data->temp_max[attr->index] = temp;
480 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
481 temp);
482 mutex_unlock(&data->lock);
483
484 return count;
485 }
486
487 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
488 char *buf)
489 {
490 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
491 struct adt7473_data *data = adt7473_update_device(dev);
492 return sprintf(buf, "%d\n", 1000 * decode_temp(
493 data->temp_twos_complement,
494 data->temp[attr->index]));
495 }
496
497 static ssize_t show_fan_min(struct device *dev,
498 struct device_attribute *devattr,
499 char *buf)
500 {
501 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
502 struct adt7473_data *data = adt7473_update_device(dev);
503
504 if (FAN_DATA_VALID(data->fan_min[attr->index]))
505 return sprintf(buf, "%d\n",
506 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
507 else
508 return sprintf(buf, "0\n");
509 }
510
511 static ssize_t set_fan_min(struct device *dev,
512 struct device_attribute *devattr,
513 const char *buf, size_t count)
514 {
515 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
516 struct i2c_client *client = to_i2c_client(dev);
517 struct adt7473_data *data = i2c_get_clientdata(client);
518 int temp = simple_strtol(buf, NULL, 10);
519
520 if (!temp)
521 return -EINVAL;
522 temp = FAN_RPM_TO_PERIOD(temp);
523
524 mutex_lock(&data->lock);
525 data->fan_min[attr->index] = temp;
526 adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
527 mutex_unlock(&data->lock);
528
529 return count;
530 }
531
532 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
533 char *buf)
534 {
535 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
536 struct adt7473_data *data = adt7473_update_device(dev);
537
538 if (FAN_DATA_VALID(data->fan[attr->index]))
539 return sprintf(buf, "%d\n",
540 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
541 else
542 return sprintf(buf, "0\n");
543 }
544
545 static ssize_t show_max_duty_at_crit(struct device *dev,
546 struct device_attribute *devattr,
547 char *buf)
548 {
549 struct adt7473_data *data = adt7473_update_device(dev);
550 return sprintf(buf, "%d\n", data->max_duty_at_overheat);
551 }
552
553 static ssize_t set_max_duty_at_crit(struct device *dev,
554 struct device_attribute *devattr,
555 const char *buf,
556 size_t count)
557 {
558 u8 reg;
559 struct i2c_client *client = to_i2c_client(dev);
560 struct adt7473_data *data = i2c_get_clientdata(client);
561 int temp = simple_strtol(buf, NULL, 10);
562
563 mutex_lock(&data->lock);
564 data->max_duty_at_overheat = !!temp;
565 reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
566 if (temp)
567 reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
568 else
569 reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
570 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
571 mutex_unlock(&data->lock);
572
573 return count;
574 }
575
576 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
577 char *buf)
578 {
579 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
580 struct adt7473_data *data = adt7473_update_device(dev);
581 return sprintf(buf, "%d\n", data->pwm[attr->index]);
582 }
583
584 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
585 const char *buf, size_t count)
586 {
587 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
588 struct i2c_client *client = to_i2c_client(dev);
589 struct adt7473_data *data = i2c_get_clientdata(client);
590 int temp = simple_strtol(buf, NULL, 10);
591
592 mutex_lock(&data->lock);
593 data->pwm[attr->index] = temp;
594 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
595 mutex_unlock(&data->lock);
596
597 return count;
598 }
599
600 static ssize_t show_pwm_max(struct device *dev,
601 struct device_attribute *devattr,
602 char *buf)
603 {
604 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
605 struct adt7473_data *data = adt7473_update_device(dev);
606 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
607 }
608
609 static ssize_t set_pwm_max(struct device *dev,
610 struct device_attribute *devattr,
611 const char *buf,
612 size_t count)
613 {
614 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
615 struct i2c_client *client = to_i2c_client(dev);
616 struct adt7473_data *data = i2c_get_clientdata(client);
617 int temp = simple_strtol(buf, NULL, 10);
618
619 mutex_lock(&data->lock);
620 data->pwm_max[attr->index] = temp;
621 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
622 temp);
623 mutex_unlock(&data->lock);
624
625 return count;
626 }
627
628 static ssize_t show_pwm_min(struct device *dev,
629 struct device_attribute *devattr,
630 char *buf)
631 {
632 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
633 struct adt7473_data *data = adt7473_update_device(dev);
634 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
635 }
636
637 static ssize_t set_pwm_min(struct device *dev,
638 struct device_attribute *devattr,
639 const char *buf,
640 size_t count)
641 {
642 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
643 struct i2c_client *client = to_i2c_client(dev);
644 struct adt7473_data *data = i2c_get_clientdata(client);
645 int temp = simple_strtol(buf, NULL, 10);
646
647 mutex_lock(&data->lock);
648 data->pwm_min[attr->index] = temp;
649 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
650 temp);
651 mutex_unlock(&data->lock);
652
653 return count;
654 }
655
656 static ssize_t show_temp_tmax(struct device *dev,
657 struct device_attribute *devattr,
658 char *buf)
659 {
660 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
661 struct adt7473_data *data = adt7473_update_device(dev);
662 return sprintf(buf, "%d\n", 1000 * decode_temp(
663 data->temp_twos_complement,
664 data->temp_tmax[attr->index]));
665 }
666
667 static ssize_t set_temp_tmax(struct device *dev,
668 struct device_attribute *devattr,
669 const char *buf,
670 size_t count)
671 {
672 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
673 struct i2c_client *client = to_i2c_client(dev);
674 struct adt7473_data *data = i2c_get_clientdata(client);
675 int temp = simple_strtol(buf, NULL, 10) / 1000;
676 temp = encode_temp(data->temp_twos_complement, temp);
677
678 mutex_lock(&data->lock);
679 data->temp_tmax[attr->index] = temp;
680 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index),
681 temp);
682 mutex_unlock(&data->lock);
683
684 return count;
685 }
686
687 static ssize_t show_temp_tmin(struct device *dev,
688 struct device_attribute *devattr,
689 char *buf)
690 {
691 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
692 struct adt7473_data *data = adt7473_update_device(dev);
693 return sprintf(buf, "%d\n", 1000 * decode_temp(
694 data->temp_twos_complement,
695 data->temp_tmin[attr->index]));
696 }
697
698 static ssize_t set_temp_tmin(struct device *dev,
699 struct device_attribute *devattr,
700 const char *buf,
701 size_t count)
702 {
703 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
704 struct i2c_client *client = to_i2c_client(dev);
705 struct adt7473_data *data = i2c_get_clientdata(client);
706 int temp = simple_strtol(buf, NULL, 10) / 1000;
707 temp = encode_temp(data->temp_twos_complement, temp);
708
709 mutex_lock(&data->lock);
710 data->temp_tmin[attr->index] = temp;
711 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
712 temp);
713 mutex_unlock(&data->lock);
714
715 return count;
716 }
717
718 static ssize_t show_pwm_enable(struct device *dev,
719 struct device_attribute *devattr,
720 char *buf)
721 {
722 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
723 struct adt7473_data *data = adt7473_update_device(dev);
724
725 switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
726 case 3:
727 return sprintf(buf, "0\n");
728 case 7:
729 return sprintf(buf, "1\n");
730 default:
731 return sprintf(buf, "2\n");
732 }
733 }
734
735 static ssize_t set_pwm_enable(struct device *dev,
736 struct device_attribute *devattr,
737 const char *buf,
738 size_t count)
739 {
740 u8 reg;
741 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
742 struct i2c_client *client = to_i2c_client(dev);
743 struct adt7473_data *data = i2c_get_clientdata(client);
744 int temp = simple_strtol(buf, NULL, 10);
745
746 switch (temp) {
747 case 0:
748 temp = 3;
749 break;
750 case 1:
751 temp = 7;
752 break;
753 case 2:
754 /* Enter automatic mode with fans off */
755 temp = 4;
756 break;
757 default:
758 return -EINVAL;
759 }
760
761 mutex_lock(&data->lock);
762 reg = i2c_smbus_read_byte_data(client,
763 ADT7473_REG_PWM_BHVR(attr->index));
764 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
765 (reg & ~ADT7473_PWM_BHVR_MASK);
766 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
767 reg);
768 data->pwm_behavior[attr->index] = reg;
769 mutex_unlock(&data->lock);
770
771 return count;
772 }
773
774 static ssize_t show_pwm_auto_temp(struct device *dev,
775 struct device_attribute *devattr,
776 char *buf)
777 {
778 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
779 struct adt7473_data *data = adt7473_update_device(dev);
780 int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
781
782 switch (bhvr) {
783 case 3:
784 case 4:
785 case 7:
786 return sprintf(buf, "0\n");
787 case 0:
788 case 1:
789 case 5:
790 case 6:
791 return sprintf(buf, "%d\n", bhvr + 1);
792 case 2:
793 return sprintf(buf, "4\n");
794 }
795 /* shouldn't ever get here */
796 BUG();
797 }
798
799 static ssize_t set_pwm_auto_temp(struct device *dev,
800 struct device_attribute *devattr,
801 const char *buf,
802 size_t count)
803 {
804 u8 reg;
805 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
806 struct i2c_client *client = to_i2c_client(dev);
807 struct adt7473_data *data = i2c_get_clientdata(client);
808 int temp = simple_strtol(buf, NULL, 10);
809
810 switch (temp) {
811 case 1:
812 case 2:
813 case 6:
814 case 7:
815 temp--;
816 break;
817 case 0:
818 temp = 4;
819 break;
820 default:
821 return -EINVAL;
822 }
823
824 mutex_lock(&data->lock);
825 reg = i2c_smbus_read_byte_data(client,
826 ADT7473_REG_PWM_BHVR(attr->index));
827 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
828 (reg & ~ADT7473_PWM_BHVR_MASK);
829 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
830 reg);
831 data->pwm_behavior[attr->index] = reg;
832 mutex_unlock(&data->lock);
833
834 return count;
835 }
836
837 static ssize_t show_alarm(struct device *dev,
838 struct device_attribute *devattr,
839 char *buf)
840 {
841 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
842 struct adt7473_data *data = adt7473_update_device(dev);
843
844 if (data->alarm & attr->index)
845 return sprintf(buf, "1\n");
846 else
847 return sprintf(buf, "0\n");
848 }
849
850
851 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
852 set_volt_max, 0);
853 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
854 set_volt_max, 1);
855
856 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
857 set_volt_min, 0);
858 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
859 set_volt_min, 1);
860
861 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
862 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
863
864 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
865 ADT7473_VCCP_ALARM);
866 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
867 ADT7473_VCC_ALARM);
868
869 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
870 set_temp_max, 0);
871 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
872 set_temp_max, 1);
873 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
874 set_temp_max, 2);
875
876 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
877 set_temp_min, 0);
878 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
879 set_temp_min, 1);
880 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
881 set_temp_min, 2);
882
883 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
884 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
885 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
886
887 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
888 ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
889 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
890 ADT7473_LT_ALARM);
891 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
892 ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
893
894 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
895 set_fan_min, 0);
896 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
897 set_fan_min, 1);
898 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
899 set_fan_min, 2);
900 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
901 set_fan_min, 3);
902
903 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
904 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
905 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
906 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
907
908 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
909 ALARM2(ADT7473_FAN1_ALARM));
910 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
911 ALARM2(ADT7473_FAN2_ALARM));
912 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
913 ALARM2(ADT7473_FAN3_ALARM));
914 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
915 ALARM2(ADT7473_FAN4_ALARM));
916
917 static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
918 show_max_duty_at_crit, set_max_duty_at_crit, 0);
919
920 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
921 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
922 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
923
924 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
925 show_pwm_min, set_pwm_min, 0);
926 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
927 show_pwm_min, set_pwm_min, 1);
928 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
929 show_pwm_min, set_pwm_min, 2);
930
931 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
932 show_pwm_max, set_pwm_max, 0);
933 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
934 show_pwm_max, set_pwm_max, 1);
935 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
936 show_pwm_max, set_pwm_max, 2);
937
938 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
939 show_temp_tmin, set_temp_tmin, 0);
940 static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
941 show_temp_tmin, set_temp_tmin, 1);
942 static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
943 show_temp_tmin, set_temp_tmin, 2);
944
945 static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
946 show_temp_tmax, set_temp_tmax, 0);
947 static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
948 show_temp_tmax, set_temp_tmax, 1);
949 static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
950 show_temp_tmax, set_temp_tmax, 2);
951
952 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
953 set_pwm_enable, 0);
954 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
955 set_pwm_enable, 1);
956 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
957 set_pwm_enable, 2);
958
959 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
960 show_pwm_auto_temp, set_pwm_auto_temp, 0);
961 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
962 show_pwm_auto_temp, set_pwm_auto_temp, 1);
963 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
964 show_pwm_auto_temp, set_pwm_auto_temp, 2);
965
966 static struct attribute *adt7473_attr[] =
967 {
968 &sensor_dev_attr_in1_max.dev_attr.attr,
969 &sensor_dev_attr_in2_max.dev_attr.attr,
970 &sensor_dev_attr_in1_min.dev_attr.attr,
971 &sensor_dev_attr_in2_min.dev_attr.attr,
972 &sensor_dev_attr_in1_input.dev_attr.attr,
973 &sensor_dev_attr_in2_input.dev_attr.attr,
974 &sensor_dev_attr_in1_alarm.dev_attr.attr,
975 &sensor_dev_attr_in2_alarm.dev_attr.attr,
976
977 &sensor_dev_attr_temp1_max.dev_attr.attr,
978 &sensor_dev_attr_temp2_max.dev_attr.attr,
979 &sensor_dev_attr_temp3_max.dev_attr.attr,
980 &sensor_dev_attr_temp1_min.dev_attr.attr,
981 &sensor_dev_attr_temp2_min.dev_attr.attr,
982 &sensor_dev_attr_temp3_min.dev_attr.attr,
983 &sensor_dev_attr_temp1_input.dev_attr.attr,
984 &sensor_dev_attr_temp2_input.dev_attr.attr,
985 &sensor_dev_attr_temp3_input.dev_attr.attr,
986 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
987 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
988 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
989 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
990 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
991 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
992 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
993 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
994 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
995
996 &sensor_dev_attr_fan1_min.dev_attr.attr,
997 &sensor_dev_attr_fan2_min.dev_attr.attr,
998 &sensor_dev_attr_fan3_min.dev_attr.attr,
999 &sensor_dev_attr_fan4_min.dev_attr.attr,
1000 &sensor_dev_attr_fan1_input.dev_attr.attr,
1001 &sensor_dev_attr_fan2_input.dev_attr.attr,
1002 &sensor_dev_attr_fan3_input.dev_attr.attr,
1003 &sensor_dev_attr_fan4_input.dev_attr.attr,
1004 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1005 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1006 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1007 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1008
1009 &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
1010
1011 &sensor_dev_attr_pwm1.dev_attr.attr,
1012 &sensor_dev_attr_pwm2.dev_attr.attr,
1013 &sensor_dev_attr_pwm3.dev_attr.attr,
1014 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1015 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1016 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1017 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1018 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1019 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1020
1021 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1022 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1023 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1024 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1025 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1026 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1027
1028 NULL
1029 };
1030
1031 /* Return 0 if detection is successful, -ENODEV otherwise */
1032 static int adt7473_detect(struct i2c_client *client, int kind,
1033 struct i2c_board_info *info)
1034 {
1035 struct i2c_adapter *adapter = client->adapter;
1036
1037 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1038 return -ENODEV;
1039
1040 if (kind <= 0) {
1041 int vendor, device, revision;
1042
1043 vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
1044 if (vendor != ADT7473_VENDOR)
1045 return -ENODEV;
1046
1047 device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
1048 if (device != ADT7473_DEVICE)
1049 return -ENODEV;
1050
1051 revision = i2c_smbus_read_byte_data(client,
1052 ADT7473_REG_REVISION);
1053 if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69)
1054 return -ENODEV;
1055 } else
1056 dev_dbg(&adapter->dev, "detection forced\n");
1057
1058 strlcpy(info->type, "adt7473", I2C_NAME_SIZE);
1059
1060 return 0;
1061 }
1062
1063 static int adt7473_probe(struct i2c_client *client,
1064 const struct i2c_device_id *id)
1065 {
1066 struct adt7473_data *data;
1067 int err;
1068
1069 data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
1070 if (!data) {
1071 err = -ENOMEM;
1072 goto exit;
1073 }
1074
1075 i2c_set_clientdata(client, data);
1076 mutex_init(&data->lock);
1077
1078 dev_info(&client->dev, "%s chip found\n", client->name);
1079
1080 /* Initialize the ADT7473 chip */
1081 adt7473_init_client(client);
1082
1083 /* Register sysfs hooks */
1084 data->attrs.attrs = adt7473_attr;
1085 err = sysfs_create_group(&client->dev.kobj, &data->attrs);
1086 if (err)
1087 goto exit_free;
1088
1089 data->hwmon_dev = hwmon_device_register(&client->dev);
1090 if (IS_ERR(data->hwmon_dev)) {
1091 err = PTR_ERR(data->hwmon_dev);
1092 goto exit_remove;
1093 }
1094
1095 return 0;
1096
1097 exit_remove:
1098 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1099 exit_free:
1100 kfree(data);
1101 exit:
1102 return err;
1103 }
1104
1105 static int adt7473_remove(struct i2c_client *client)
1106 {
1107 struct adt7473_data *data = i2c_get_clientdata(client);
1108
1109 hwmon_device_unregister(data->hwmon_dev);
1110 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1111 kfree(data);
1112 return 0;
1113 }
1114
1115 static int __init adt7473_init(void)
1116 {
1117 return i2c_add_driver(&adt7473_driver);
1118 }
1119
1120 static void __exit adt7473_exit(void)
1121 {
1122 i2c_del_driver(&adt7473_driver);
1123 }
1124
1125 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1126 MODULE_DESCRIPTION("ADT7473 driver");
1127 MODULE_LICENSE("GPL");
1128
1129 module_init(adt7473_init);
1130 module_exit(adt7473_exit);
Linux kernel - Deliverables
This page took 0.11614 seconds and 6 git commands to generate.