tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * A hwmon driver for the Analog Devices ADT7470
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 */
33static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
34
35/* Insmod parameters */
36I2C_CLIENT_INSMOD_1(adt7470);
37
38/* ADT7470 registers */
39#define ADT7470_REG_BASE_ADDR 0x20
40#define ADT7470_REG_TEMP_BASE_ADDR 0x20
41#define ADT7470_REG_TEMP_MAX_ADDR 0x29
42#define ADT7470_REG_FAN_BASE_ADDR 0x2A
43#define ADT7470_REG_FAN_MAX_ADDR 0x31
44#define ADT7470_REG_PWM_BASE_ADDR 0x32
45#define ADT7470_REG_PWM_MAX_ADDR 0x35
46#define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
47#define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
48#define ADT7470_REG_CFG 0x40
49#define ADT7470_FSPD_MASK 0x04
50#define ADT7470_REG_ALARM1 0x41
51#define ADT7470_R1T_ALARM 0x01
52#define ADT7470_R2T_ALARM 0x02
53#define ADT7470_R3T_ALARM 0x04
54#define ADT7470_R4T_ALARM 0x08
55#define ADT7470_R5T_ALARM 0x10
56#define ADT7470_R6T_ALARM 0x20
57#define ADT7470_R7T_ALARM 0x40
58#define ADT7470_OOL_ALARM 0x80
59#define ADT7470_REG_ALARM2 0x42
60#define ADT7470_R8T_ALARM 0x01
61#define ADT7470_R9T_ALARM 0x02
62#define ADT7470_R10T_ALARM 0x04
63#define ADT7470_FAN1_ALARM 0x10
64#define ADT7470_FAN2_ALARM 0x20
65#define ADT7470_FAN3_ALARM 0x40
66#define ADT7470_FAN4_ALARM 0x80
67#define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
68#define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
69#define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
70#define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
71#define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
72#define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
73#define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
74#define ADT7470_REG_PWM12_CFG 0x68
75#define ADT7470_PWM2_AUTO_MASK 0x40
76#define ADT7470_PWM1_AUTO_MASK 0x80
77#define ADT7470_REG_PWM34_CFG 0x69
78#define ADT7470_PWM3_AUTO_MASK 0x40
79#define ADT7470_PWM4_AUTO_MASK 0x80
80#define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
81#define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
82#define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
83#define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
84#define ADT7470_REG_ACOUSTICS12 0x75
85#define ADT7470_REG_ACOUSTICS34 0x76
86#define ADT7470_REG_DEVICE 0x3D
87#define ADT7470_REG_VENDOR 0x3E
88#define ADT7470_REG_REVISION 0x3F
89#define ADT7470_REG_ALARM1_MASK 0x72
90#define ADT7470_REG_ALARM2_MASK 0x73
91#define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
92#define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
93#define ADT7470_REG_MAX_ADDR 0x81
94
95#define ADT7470_TEMP_COUNT 10
96#define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
97#define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
98#define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
99 ((x) * 2) + 1)
100
101#define ADT7470_FAN_COUNT 4
102#define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
103#define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
104#define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
105
106#define ADT7470_PWM_COUNT 4
107#define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
108#define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
109#define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
110#define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
111#define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
112#define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
113 ((x) / 2))
114
115#define ALARM2(x) ((x) << 8)
116
117#define ADT7470_VENDOR 0x41
118#define ADT7470_DEVICE 0x70
119/* datasheet only mentions a revision 2 */
120#define ADT7470_REVISION 0x02
121
122/* "all temps" according to hwmon sysfs interface spec */
123#define ADT7470_PWM_ALL_TEMPS 0x3FF
124
125/* How often do we reread sensors values? (In jiffies) */
126#define SENSOR_REFRESH_INTERVAL (5 * HZ)
127
128/* How often do we reread sensor limit values? (In jiffies) */
129#define LIMIT_REFRESH_INTERVAL (60 * HZ)
130
131/* sleep 1s while gathering temperature data */
132#define TEMP_COLLECTION_TIME 1000
133
134/* datasheet says to divide this number by the fan reading to get fan rpm */
135#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
136#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
137#define FAN_PERIOD_INVALID 65535
138#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
139
140struct adt7470_data {
141 struct device *hwmon_dev;
142 struct attribute_group attrs;
143 struct mutex lock;
144 char sensors_valid;
145 char limits_valid;
146 unsigned long sensors_last_updated; /* In jiffies */
147 unsigned long limits_last_updated; /* In jiffies */
148
149 s8 temp[ADT7470_TEMP_COUNT];
150 s8 temp_min[ADT7470_TEMP_COUNT];
151 s8 temp_max[ADT7470_TEMP_COUNT];
152 u16 fan[ADT7470_FAN_COUNT];
153 u16 fan_min[ADT7470_FAN_COUNT];
154 u16 fan_max[ADT7470_FAN_COUNT];
155 u16 alarm;
156 u16 alarms_mask;
157 u8 force_pwm_max;
158 u8 pwm[ADT7470_PWM_COUNT];
159 u8 pwm_max[ADT7470_PWM_COUNT];
160 u8 pwm_automatic[ADT7470_PWM_COUNT];
161 u8 pwm_min[ADT7470_PWM_COUNT];
162 s8 pwm_tmin[ADT7470_PWM_COUNT];
163 u8 pwm_auto_temp[ADT7470_PWM_COUNT];
164};
165
166static int adt7470_probe(struct i2c_client *client,
167 const struct i2c_device_id *id);
168static int adt7470_detect(struct i2c_client *client, int kind,
169 struct i2c_board_info *info);
170static int adt7470_remove(struct i2c_client *client);
171
172static const struct i2c_device_id adt7470_id[] = {
173 { "adt7470", adt7470 },
174 { }
175};
176MODULE_DEVICE_TABLE(i2c, adt7470_id);
177
178static struct i2c_driver adt7470_driver = {
179 .class = I2C_CLASS_HWMON,
180 .driver = {
181 .name = "adt7470",
182 },
183 .probe = adt7470_probe,
184 .remove = adt7470_remove,
185 .id_table = adt7470_id,
186 .detect = adt7470_detect,
187 .address_data = &addr_data,
188};
189
190/*
191 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says
192 * that the low byte must be read before the high byte.
193 */
194static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
195{
196 u16 foo;
197 foo = i2c_smbus_read_byte_data(client, reg);
198 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
199 return foo;
200}
201
202static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
203 u16 value)
204{
205 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
206 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
207}
208
209static void adt7470_init_client(struct i2c_client *client)
210{
211 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
212
213 if (reg < 0) {
214 dev_err(&client->dev, "cannot read configuration register\n");
215 } else {
216 /* start monitoring (and do a self-test) */
217 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
218 }
219}
220
221static struct adt7470_data *adt7470_update_device(struct device *dev)
222{
223 struct i2c_client *client = to_i2c_client(dev);
224 struct adt7470_data *data = i2c_get_clientdata(client);
225 unsigned long local_jiffies = jiffies;
226 u8 cfg;
227 int i;
228
229 mutex_lock(&data->lock);
230 if (time_before(local_jiffies, data->sensors_last_updated +
231 SENSOR_REFRESH_INTERVAL)
232 && data->sensors_valid)
233 goto no_sensor_update;
234
235 /* start reading temperature sensors */
236 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
237 cfg |= 0x80;
238 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
239
240 /*
241 * Delay is 200ms * number of tmp05 sensors. Too bad
242 * there's no way to figure out how many are connected.
243 * For now, assume 1s will work.
244 */
245 msleep(TEMP_COLLECTION_TIME);
246
247 /* done reading temperature sensors */
248 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
249 cfg &= ~0x80;
250 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
251
252 for (i = 0; i < ADT7470_TEMP_COUNT; i++)
253 data->temp[i] = i2c_smbus_read_byte_data(client,
254 ADT7470_TEMP_REG(i));
255
256 for (i = 0; i < ADT7470_FAN_COUNT; i++)
257 data->fan[i] = adt7470_read_word_data(client,
258 ADT7470_REG_FAN(i));
259
260 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
261 int reg;
262 int reg_mask;
263
264 data->pwm[i] = i2c_smbus_read_byte_data(client,
265 ADT7470_REG_PWM(i));
266
267 if (i % 2)
268 reg_mask = ADT7470_PWM2_AUTO_MASK;
269 else
270 reg_mask = ADT7470_PWM1_AUTO_MASK;
271
272 reg = ADT7470_REG_PWM_CFG(i);
273 if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
274 data->pwm_automatic[i] = 1;
275 else
276 data->pwm_automatic[i] = 0;
277
278 reg = ADT7470_REG_PWM_AUTO_TEMP(i);
279 cfg = i2c_smbus_read_byte_data(client, reg);
280 if (!(i % 2))
281 data->pwm_auto_temp[i] = cfg >> 4;
282 else
283 data->pwm_auto_temp[i] = cfg & 0xF;
284 }
285
286 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
287 ADT7470_FSPD_MASK)
288 data->force_pwm_max = 1;
289 else
290 data->force_pwm_max = 0;
291
292 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
293 if (data->alarm & ADT7470_OOL_ALARM)
294 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
295 ADT7470_REG_ALARM2));
296 data->alarms_mask = adt7470_read_word_data(client,
297 ADT7470_REG_ALARM1_MASK);
298
299 data->sensors_last_updated = local_jiffies;
300 data->sensors_valid = 1;
301
302no_sensor_update:
303 if (time_before(local_jiffies, data->limits_last_updated +
304 LIMIT_REFRESH_INTERVAL)
305 && data->limits_valid)
306 goto out;
307
308 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
309 data->temp_min[i] = i2c_smbus_read_byte_data(client,
310 ADT7470_TEMP_MIN_REG(i));
311 data->temp_max[i] = i2c_smbus_read_byte_data(client,
312 ADT7470_TEMP_MAX_REG(i));
313 }
314
315 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
316 data->fan_min[i] = adt7470_read_word_data(client,
317 ADT7470_REG_FAN_MIN(i));
318 data->fan_max[i] = adt7470_read_word_data(client,
319 ADT7470_REG_FAN_MAX(i));
320 }
321
322 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
323 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
324 ADT7470_REG_PWM_MAX(i));
325 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
326 ADT7470_REG_PWM_MIN(i));
327 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
328 ADT7470_REG_PWM_TMIN(i));
329 }
330
331 data->limits_last_updated = local_jiffies;
332 data->limits_valid = 1;
333
334out:
335 mutex_unlock(&data->lock);
336 return data;
337}
338
339static ssize_t show_temp_min(struct device *dev,
340 struct device_attribute *devattr,
341 char *buf)
342{
343 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
344 struct adt7470_data *data = adt7470_update_device(dev);
345 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
346}
347
348static ssize_t set_temp_min(struct device *dev,
349 struct device_attribute *devattr,
350 const char *buf,
351 size_t count)
352{
353 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
354 struct i2c_client *client = to_i2c_client(dev);
355 struct adt7470_data *data = i2c_get_clientdata(client);
356 int temp = simple_strtol(buf, NULL, 10) / 1000;
357
358 mutex_lock(&data->lock);
359 data->temp_min[attr->index] = temp;
360 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
361 temp);
362 mutex_unlock(&data->lock);
363
364 return count;
365}
366
367static ssize_t show_temp_max(struct device *dev,
368 struct device_attribute *devattr,
369 char *buf)
370{
371 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
372 struct adt7470_data *data = adt7470_update_device(dev);
373 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
374}
375
376static ssize_t set_temp_max(struct device *dev,
377 struct device_attribute *devattr,
378 const char *buf,
379 size_t count)
380{
381 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
382 struct i2c_client *client = to_i2c_client(dev);
383 struct adt7470_data *data = i2c_get_clientdata(client);
384 int temp = simple_strtol(buf, NULL, 10) / 1000;
385
386 mutex_lock(&data->lock);
387 data->temp_max[attr->index] = temp;
388 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
389 temp);
390 mutex_unlock(&data->lock);
391
392 return count;
393}
394
395static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
396 char *buf)
397{
398 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
399 struct adt7470_data *data = adt7470_update_device(dev);
400 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
401}
402
403static ssize_t show_alarm_mask(struct device *dev,
404 struct device_attribute *devattr,
405 char *buf)
406{
407 struct adt7470_data *data = adt7470_update_device(dev);
408
409 return sprintf(buf, "%x\n", data->alarms_mask);
410}
411
412static ssize_t show_fan_max(struct device *dev,
413 struct device_attribute *devattr,
414 char *buf)
415{
416 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
417 struct adt7470_data *data = adt7470_update_device(dev);
418
419 if (FAN_DATA_VALID(data->fan_max[attr->index]))
420 return sprintf(buf, "%d\n",
421 FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
422 else
423 return sprintf(buf, "0\n");
424}
425
426static ssize_t set_fan_max(struct device *dev,
427 struct device_attribute *devattr,
428 const char *buf, size_t count)
429{
430 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
431 struct i2c_client *client = to_i2c_client(dev);
432 struct adt7470_data *data = i2c_get_clientdata(client);
433 int temp = simple_strtol(buf, NULL, 10);
434
435 if (!temp)
436 return -EINVAL;
437 temp = FAN_RPM_TO_PERIOD(temp);
438
439 mutex_lock(&data->lock);
440 data->fan_max[attr->index] = temp;
441 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
442 mutex_unlock(&data->lock);
443
444 return count;
445}
446
447static ssize_t show_fan_min(struct device *dev,
448 struct device_attribute *devattr,
449 char *buf)
450{
451 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
452 struct adt7470_data *data = adt7470_update_device(dev);
453
454 if (FAN_DATA_VALID(data->fan_min[attr->index]))
455 return sprintf(buf, "%d\n",
456 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
457 else
458 return sprintf(buf, "0\n");
459}
460
461static ssize_t set_fan_min(struct device *dev,
462 struct device_attribute *devattr,
463 const char *buf, size_t count)
464{
465 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
466 struct i2c_client *client = to_i2c_client(dev);
467 struct adt7470_data *data = i2c_get_clientdata(client);
468 int temp = simple_strtol(buf, NULL, 10);
469
470 if (!temp)
471 return -EINVAL;
472 temp = FAN_RPM_TO_PERIOD(temp);
473
474 mutex_lock(&data->lock);
475 data->fan_min[attr->index] = temp;
476 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
477 mutex_unlock(&data->lock);
478
479 return count;
480}
481
482static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
483 char *buf)
484{
485 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
486 struct adt7470_data *data = adt7470_update_device(dev);
487
488 if (FAN_DATA_VALID(data->fan[attr->index]))
489 return sprintf(buf, "%d\n",
490 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
491 else
492 return sprintf(buf, "0\n");
493}
494
495static ssize_t show_force_pwm_max(struct device *dev,
496 struct device_attribute *devattr,
497 char *buf)
498{
499 struct adt7470_data *data = adt7470_update_device(dev);
500 return sprintf(buf, "%d\n", data->force_pwm_max);
501}
502
503static ssize_t set_force_pwm_max(struct device *dev,
504 struct device_attribute *devattr,
505 const char *buf,
506 size_t count)
507{
508 struct i2c_client *client = to_i2c_client(dev);
509 struct adt7470_data *data = i2c_get_clientdata(client);
510 int temp = simple_strtol(buf, NULL, 10);
511 u8 reg;
512
513 mutex_lock(&data->lock);
514 data->force_pwm_max = temp;
515 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
516 if (temp)
517 reg |= ADT7470_FSPD_MASK;
518 else
519 reg &= ~ADT7470_FSPD_MASK;
520 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
521 mutex_unlock(&data->lock);
522
523 return count;
524}
525
526static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
527 char *buf)
528{
529 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
530 struct adt7470_data *data = adt7470_update_device(dev);
531 return sprintf(buf, "%d\n", data->pwm[attr->index]);
532}
533
534static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
535 const char *buf, size_t count)
536{
537 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
538 struct i2c_client *client = to_i2c_client(dev);
539 struct adt7470_data *data = i2c_get_clientdata(client);
540 int temp = simple_strtol(buf, NULL, 10);
541
542 mutex_lock(&data->lock);
543 data->pwm[attr->index] = temp;
544 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
545 mutex_unlock(&data->lock);
546
547 return count;
548}
549
550static ssize_t show_pwm_max(struct device *dev,
551 struct device_attribute *devattr,
552 char *buf)
553{
554 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
555 struct adt7470_data *data = adt7470_update_device(dev);
556 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
557}
558
559static ssize_t set_pwm_max(struct device *dev,
560 struct device_attribute *devattr,
561 const char *buf,
562 size_t count)
563{
564 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
565 struct i2c_client *client = to_i2c_client(dev);
566 struct adt7470_data *data = i2c_get_clientdata(client);
567 int temp = simple_strtol(buf, NULL, 10);
568
569 mutex_lock(&data->lock);
570 data->pwm_max[attr->index] = temp;
571 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
572 temp);
573 mutex_unlock(&data->lock);
574
575 return count;
576}
577
578static ssize_t show_pwm_min(struct device *dev,
579 struct device_attribute *devattr,
580 char *buf)
581{
582 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
583 struct adt7470_data *data = adt7470_update_device(dev);
584 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
585}
586
587static ssize_t set_pwm_min(struct device *dev,
588 struct device_attribute *devattr,
589 const char *buf,
590 size_t count)
591{
592 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
593 struct i2c_client *client = to_i2c_client(dev);
594 struct adt7470_data *data = i2c_get_clientdata(client);
595 int temp = simple_strtol(buf, NULL, 10);
596
597 mutex_lock(&data->lock);
598 data->pwm_min[attr->index] = temp;
599 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
600 temp);
601 mutex_unlock(&data->lock);
602
603 return count;
604}
605
606static ssize_t show_pwm_tmax(struct device *dev,
607 struct device_attribute *devattr,
608 char *buf)
609{
610 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
611 struct adt7470_data *data = adt7470_update_device(dev);
612 /* the datasheet says that tmax = tmin + 20C */
613 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
614}
615
616static ssize_t show_pwm_tmin(struct device *dev,
617 struct device_attribute *devattr,
618 char *buf)
619{
620 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
621 struct adt7470_data *data = adt7470_update_device(dev);
622 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
623}
624
625static ssize_t set_pwm_tmin(struct device *dev,
626 struct device_attribute *devattr,
627 const char *buf,
628 size_t count)
629{
630 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
631 struct i2c_client *client = to_i2c_client(dev);
632 struct adt7470_data *data = i2c_get_clientdata(client);
633 int temp = simple_strtol(buf, NULL, 10) / 1000;
634
635 mutex_lock(&data->lock);
636 data->pwm_tmin[attr->index] = temp;
637 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
638 temp);
639 mutex_unlock(&data->lock);
640
641 return count;
642}
643
644static ssize_t show_pwm_auto(struct device *dev,
645 struct device_attribute *devattr,
646 char *buf)
647{
648 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
649 struct adt7470_data *data = adt7470_update_device(dev);
650 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
651}
652
653static ssize_t set_pwm_auto(struct device *dev,
654 struct device_attribute *devattr,
655 const char *buf,
656 size_t count)
657{
658 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
659 struct i2c_client *client = to_i2c_client(dev);
660 struct adt7470_data *data = i2c_get_clientdata(client);
661 int temp = simple_strtol(buf, NULL, 10);
662 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
663 int pwm_auto_reg_mask;
664 u8 reg;
665
666 if (attr->index % 2)
667 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
668 else
669 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
670
671 if (temp != 2 && temp != 1)
672 return -EINVAL;
673 temp--;
674
675 mutex_lock(&data->lock);
676 data->pwm_automatic[attr->index] = temp;
677 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
678 if (temp)
679 reg |= pwm_auto_reg_mask;
680 else
681 reg &= ~pwm_auto_reg_mask;
682 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
683 mutex_unlock(&data->lock);
684
685 return count;
686}
687
688static ssize_t show_pwm_auto_temp(struct device *dev,
689 struct device_attribute *devattr,
690 char *buf)
691{
692 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
693 struct adt7470_data *data = adt7470_update_device(dev);
694 u8 ctrl = data->pwm_auto_temp[attr->index];
695
696 if (ctrl)
697 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
698 else
699 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
700}
701
702static int cvt_auto_temp(int input)
703{
704 if (input == ADT7470_PWM_ALL_TEMPS)
705 return 0;
706 if (input < 1 || !is_power_of_2(input))
707 return -EINVAL;
708 return ilog2(input) + 1;
709}
710
711static ssize_t set_pwm_auto_temp(struct device *dev,
712 struct device_attribute *devattr,
713 const char *buf,
714 size_t count)
715{
716 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
717 struct i2c_client *client = to_i2c_client(dev);
718 struct adt7470_data *data = i2c_get_clientdata(client);
719 int temp = cvt_auto_temp(simple_strtol(buf, NULL, 10));
720 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
721 u8 reg;
722
723 if (temp < 0)
724 return temp;
725
726 mutex_lock(&data->lock);
727 data->pwm_automatic[attr->index] = temp;
728 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
729
730 if (!(attr->index % 2)) {
731 reg &= 0xF;
732 reg |= (temp << 4) & 0xF0;
733 } else {
734 reg &= 0xF0;
735 reg |= temp & 0xF;
736 }
737
738 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
739 mutex_unlock(&data->lock);
740
741 return count;
742}
743
744static ssize_t show_alarm(struct device *dev,
745 struct device_attribute *devattr,
746 char *buf)
747{
748 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
749 struct adt7470_data *data = adt7470_update_device(dev);
750
751 if (data->alarm & attr->index)
752 return sprintf(buf, "1\n");
753 else
754 return sprintf(buf, "0\n");
755}
756
757static DEVICE_ATTR(alarm_mask, S_IRUGO, show_alarm_mask, NULL);
758
759static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
760 set_temp_max, 0);
761static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
762 set_temp_max, 1);
763static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
764 set_temp_max, 2);
765static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max,
766 set_temp_max, 3);
767static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max,
768 set_temp_max, 4);
769static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max,
770 set_temp_max, 5);
771static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max,
772 set_temp_max, 6);
773static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max,
774 set_temp_max, 7);
775static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max,
776 set_temp_max, 8);
777static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max,
778 set_temp_max, 9);
779
780static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
781 set_temp_min, 0);
782static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
783 set_temp_min, 1);
784static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
785 set_temp_min, 2);
786static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min,
787 set_temp_min, 3);
788static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min,
789 set_temp_min, 4);
790static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min,
791 set_temp_min, 5);
792static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min,
793 set_temp_min, 6);
794static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min,
795 set_temp_min, 7);
796static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min,
797 set_temp_min, 8);
798static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min,
799 set_temp_min, 9);
800
801static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
802static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
803static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
804static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
805static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
806static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
807static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
808static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
809static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8);
810static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9);
811
812static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
813 ADT7470_R1T_ALARM);
814static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
815 ADT7470_R2T_ALARM);
816static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
817 ADT7470_R3T_ALARM);
818static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL,
819 ADT7470_R4T_ALARM);
820static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL,
821 ADT7470_R5T_ALARM);
822static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL,
823 ADT7470_R6T_ALARM);
824static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL,
825 ADT7470_R7T_ALARM);
826static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL,
827 ALARM2(ADT7470_R8T_ALARM));
828static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL,
829 ALARM2(ADT7470_R9T_ALARM));
830static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL,
831 ALARM2(ADT7470_R10T_ALARM));
832
833static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
834 set_fan_max, 0);
835static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
836 set_fan_max, 1);
837static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
838 set_fan_max, 2);
839static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max,
840 set_fan_max, 3);
841
842static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
843 set_fan_min, 0);
844static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
845 set_fan_min, 1);
846static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
847 set_fan_min, 2);
848static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
849 set_fan_min, 3);
850
851static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
852static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
853static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
854static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
855
856static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
857 ALARM2(ADT7470_FAN1_ALARM));
858static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
859 ALARM2(ADT7470_FAN2_ALARM));
860static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
861 ALARM2(ADT7470_FAN3_ALARM));
862static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
863 ALARM2(ADT7470_FAN4_ALARM));
864
865static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO,
866 show_force_pwm_max, set_force_pwm_max, 0);
867
868static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
869static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
870static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
871static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
872
873static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
874 show_pwm_min, set_pwm_min, 0);
875static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
876 show_pwm_min, set_pwm_min, 1);
877static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
878 show_pwm_min, set_pwm_min, 2);
879static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO,
880 show_pwm_min, set_pwm_min, 3);
881
882static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
883 show_pwm_max, set_pwm_max, 0);
884static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
885 show_pwm_max, set_pwm_max, 1);
886static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
887 show_pwm_max, set_pwm_max, 2);
888static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO,
889 show_pwm_max, set_pwm_max, 3);
890
891static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
892 show_pwm_tmin, set_pwm_tmin, 0);
893static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO,
894 show_pwm_tmin, set_pwm_tmin, 1);
895static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO,
896 show_pwm_tmin, set_pwm_tmin, 2);
897static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO,
898 show_pwm_tmin, set_pwm_tmin, 3);
899
900static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax,
901 NULL, 0);
902static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax,
903 NULL, 1);
904static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax,
905 NULL, 2);
906static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax,
907 NULL, 3);
908
909static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
910 set_pwm_auto, 0);
911static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
912 set_pwm_auto, 1);
913static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
914 set_pwm_auto, 2);
915static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
916 set_pwm_auto, 3);
917
918static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
919 show_pwm_auto_temp, set_pwm_auto_temp, 0);
920static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
921 show_pwm_auto_temp, set_pwm_auto_temp, 1);
922static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
923 show_pwm_auto_temp, set_pwm_auto_temp, 2);
924static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
925 show_pwm_auto_temp, set_pwm_auto_temp, 3);
926
927static struct attribute *adt7470_attr[] =
928{
929 &dev_attr_alarm_mask.attr,
930 &sensor_dev_attr_temp1_max.dev_attr.attr,
931 &sensor_dev_attr_temp2_max.dev_attr.attr,
932 &sensor_dev_attr_temp3_max.dev_attr.attr,
933 &sensor_dev_attr_temp4_max.dev_attr.attr,
934 &sensor_dev_attr_temp5_max.dev_attr.attr,
935 &sensor_dev_attr_temp6_max.dev_attr.attr,
936 &sensor_dev_attr_temp7_max.dev_attr.attr,
937 &sensor_dev_attr_temp8_max.dev_attr.attr,
938 &sensor_dev_attr_temp9_max.dev_attr.attr,
939 &sensor_dev_attr_temp10_max.dev_attr.attr,
940 &sensor_dev_attr_temp1_min.dev_attr.attr,
941 &sensor_dev_attr_temp2_min.dev_attr.attr,
942 &sensor_dev_attr_temp3_min.dev_attr.attr,
943 &sensor_dev_attr_temp4_min.dev_attr.attr,
944 &sensor_dev_attr_temp5_min.dev_attr.attr,
945 &sensor_dev_attr_temp6_min.dev_attr.attr,
946 &sensor_dev_attr_temp7_min.dev_attr.attr,
947 &sensor_dev_attr_temp8_min.dev_attr.attr,
948 &sensor_dev_attr_temp9_min.dev_attr.attr,
949 &sensor_dev_attr_temp10_min.dev_attr.attr,
950 &sensor_dev_attr_temp1_input.dev_attr.attr,
951 &sensor_dev_attr_temp2_input.dev_attr.attr,
952 &sensor_dev_attr_temp3_input.dev_attr.attr,
953 &sensor_dev_attr_temp4_input.dev_attr.attr,
954 &sensor_dev_attr_temp5_input.dev_attr.attr,
955 &sensor_dev_attr_temp6_input.dev_attr.attr,
956 &sensor_dev_attr_temp7_input.dev_attr.attr,
957 &sensor_dev_attr_temp8_input.dev_attr.attr,
958 &sensor_dev_attr_temp9_input.dev_attr.attr,
959 &sensor_dev_attr_temp10_input.dev_attr.attr,
960 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
961 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
962 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
963 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
964 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
965 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
966 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
967 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
968 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
969 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
970 &sensor_dev_attr_fan1_max.dev_attr.attr,
971 &sensor_dev_attr_fan2_max.dev_attr.attr,
972 &sensor_dev_attr_fan3_max.dev_attr.attr,
973 &sensor_dev_attr_fan4_max.dev_attr.attr,
974 &sensor_dev_attr_fan1_min.dev_attr.attr,
975 &sensor_dev_attr_fan2_min.dev_attr.attr,
976 &sensor_dev_attr_fan3_min.dev_attr.attr,
977 &sensor_dev_attr_fan4_min.dev_attr.attr,
978 &sensor_dev_attr_fan1_input.dev_attr.attr,
979 &sensor_dev_attr_fan2_input.dev_attr.attr,
980 &sensor_dev_attr_fan3_input.dev_attr.attr,
981 &sensor_dev_attr_fan4_input.dev_attr.attr,
982 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
983 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
984 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
985 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
986 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
987 &sensor_dev_attr_pwm1.dev_attr.attr,
988 &sensor_dev_attr_pwm2.dev_attr.attr,
989 &sensor_dev_attr_pwm3.dev_attr.attr,
990 &sensor_dev_attr_pwm4.dev_attr.attr,
991 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
992 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
993 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
994 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
995 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
996 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
997 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
998 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
999 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1000 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1001 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1002 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1003 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1004 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1005 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1006 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1007 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1008 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1009 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1010 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1011 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1012 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1013 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1014 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1015 NULL
1016};
1017
1018/* Return 0 if detection is successful, -ENODEV otherwise */
1019static int adt7470_detect(struct i2c_client *client, int kind,
1020 struct i2c_board_info *info)
1021{
1022 struct i2c_adapter *adapter = client->adapter;
1023
1024 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1025 return -ENODEV;
1026
1027 if (kind <= 0) {
1028 int vendor, device, revision;
1029
1030 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1031 if (vendor != ADT7470_VENDOR)
1032 return -ENODEV;
1033
1034 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1035 if (device != ADT7470_DEVICE)
1036 return -ENODEV;
1037
1038 revision = i2c_smbus_read_byte_data(client,
1039 ADT7470_REG_REVISION);
1040 if (revision != ADT7470_REVISION)
1041 return -ENODEV;
1042 } else
1043 dev_dbg(&adapter->dev, "detection forced\n");
1044
1045 strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1046
1047 return 0;
1048}
1049
1050static int adt7470_probe(struct i2c_client *client,
1051 const struct i2c_device_id *id)
1052{
1053 struct adt7470_data *data;
1054 int err;
1055
1056 data = kzalloc(sizeof(struct adt7470_data), GFP_KERNEL);
1057 if (!data) {
1058 err = -ENOMEM;
1059 goto exit;
1060 }
1061
1062 i2c_set_clientdata(client, data);
1063 mutex_init(&data->lock);
1064
1065 dev_info(&client->dev, "%s chip found\n", client->name);
1066
1067 /* Initialize the ADT7470 chip */
1068 adt7470_init_client(client);
1069
1070 /* Register sysfs hooks */
1071 data->attrs.attrs = adt7470_attr;
1072 if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
1073 goto exit_free;
1074
1075 data->hwmon_dev = hwmon_device_register(&client->dev);
1076 if (IS_ERR(data->hwmon_dev)) {
1077 err = PTR_ERR(data->hwmon_dev);
1078 goto exit_remove;
1079 }
1080
1081 return 0;
1082
1083exit_remove:
1084 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1085exit_free:
1086 kfree(data);
1087exit:
1088 return err;
1089}
1090
1091static int adt7470_remove(struct i2c_client *client)
1092{
1093 struct adt7470_data *data = i2c_get_clientdata(client);
1094
1095 hwmon_device_unregister(data->hwmon_dev);
1096 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1097 kfree(data);
1098 return 0;
1099}
1100
1101static int __init adt7470_init(void)
1102{
1103 return i2c_add_driver(&adt7470_driver);
1104}
1105
1106static void __exit adt7470_exit(void)
1107{
1108 i2c_del_driver(&adt7470_driver);
1109}
1110
1111MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1112MODULE_DESCRIPTION("ADT7470 driver");
1113MODULE_LICENSE("GPL");
1114
1115module_init(adt7470_init);
1116module_exit(adt7470_exit);