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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24#include <linux/module.h>
25#include <linux/jiffies.h>
26#include <linux/i2c.h>
27#include <linux/hwmon.h>
28#include <linux/hwmon-sysfs.h>
29#include <linux/err.h>
30#include <linux/mutex.h>
31#include <linux/delay.h>
32#include <linux/log2.h>
33#include <linux/kthread.h>
34#include <linux/slab.h>
35
36/* Addresses to scan */
37static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
38
39/* ADT7470 registers */
40#define ADT7470_REG_BASE_ADDR 0x20
41#define ADT7470_REG_TEMP_BASE_ADDR 0x20
42#define ADT7470_REG_TEMP_MAX_ADDR 0x29
43#define ADT7470_REG_FAN_BASE_ADDR 0x2A
44#define ADT7470_REG_FAN_MAX_ADDR 0x31
45#define ADT7470_REG_PWM_BASE_ADDR 0x32
46#define ADT7470_REG_PWM_MAX_ADDR 0x35
47#define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
48#define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
49#define ADT7470_REG_CFG 0x40
50#define ADT7470_FSPD_MASK 0x04
51#define ADT7470_REG_ALARM1 0x41
52#define ADT7470_R1T_ALARM 0x01
53#define ADT7470_R2T_ALARM 0x02
54#define ADT7470_R3T_ALARM 0x04
55#define ADT7470_R4T_ALARM 0x08
56#define ADT7470_R5T_ALARM 0x10
57#define ADT7470_R6T_ALARM 0x20
58#define ADT7470_R7T_ALARM 0x40
59#define ADT7470_OOL_ALARM 0x80
60#define ADT7470_REG_ALARM2 0x42
61#define ADT7470_R8T_ALARM 0x01
62#define ADT7470_R9T_ALARM 0x02
63#define ADT7470_R10T_ALARM 0x04
64#define ADT7470_FAN1_ALARM 0x10
65#define ADT7470_FAN2_ALARM 0x20
66#define ADT7470_FAN3_ALARM 0x40
67#define ADT7470_FAN4_ALARM 0x80
68#define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
69#define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
70#define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
71#define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
72#define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
73#define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
74#define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
75#define ADT7470_REG_PWM12_CFG 0x68
76#define ADT7470_PWM2_AUTO_MASK 0x40
77#define ADT7470_PWM1_AUTO_MASK 0x80
78#define ADT7470_PWM_AUTO_MASK 0xC0
79#define ADT7470_REG_PWM34_CFG 0x69
80#define ADT7470_PWM3_AUTO_MASK 0x40
81#define ADT7470_PWM4_AUTO_MASK 0x80
82#define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
83#define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
84#define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
85#define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
86#define ADT7470_REG_ACOUSTICS12 0x75
87#define ADT7470_REG_ACOUSTICS34 0x76
88#define ADT7470_REG_DEVICE 0x3D
89#define ADT7470_REG_VENDOR 0x3E
90#define ADT7470_REG_REVISION 0x3F
91#define ADT7470_REG_ALARM1_MASK 0x72
92#define ADT7470_REG_ALARM2_MASK 0x73
93#define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
94#define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
95#define ADT7470_REG_MAX_ADDR 0x81
96
97#define ADT7470_TEMP_COUNT 10
98#define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
99#define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
100#define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
101 ((x) * 2) + 1)
102
103#define ADT7470_FAN_COUNT 4
104#define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
105#define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
106#define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
107
108#define ADT7470_PWM_COUNT 4
109#define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
110#define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
111#define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
112#define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
113#define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
114#define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
115 ((x) / 2))
116
117#define ALARM2(x) ((x) << 8)
118
119#define ADT7470_VENDOR 0x41
120#define ADT7470_DEVICE 0x70
121/* datasheet only mentions a revision 2 */
122#define ADT7470_REVISION 0x02
123
124/* "all temps" according to hwmon sysfs interface spec */
125#define ADT7470_PWM_ALL_TEMPS 0x3FF
126
127/* How often do we reread sensors values? (In jiffies) */
128#define SENSOR_REFRESH_INTERVAL (5 * HZ)
129
130/* How often do we reread sensor limit values? (In jiffies) */
131#define LIMIT_REFRESH_INTERVAL (60 * HZ)
132
133/* Wait at least 200ms per sensor for 10 sensors */
134#define TEMP_COLLECTION_TIME 2000
135
136/* auto update thing won't fire more than every 2s */
137#define AUTO_UPDATE_INTERVAL 2000
138
139/* datasheet says to divide this number by the fan reading to get fan rpm */
140#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
141#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
142#define FAN_PERIOD_INVALID 65535
143#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
144
145struct adt7470_data {
146 struct device *hwmon_dev;
147 struct attribute_group attrs;
148 struct mutex lock;
149 char sensors_valid;
150 char limits_valid;
151 unsigned long sensors_last_updated; /* In jiffies */
152 unsigned long limits_last_updated; /* In jiffies */
153
154 int num_temp_sensors; /* -1 = probe */
155 int temperatures_probed;
156
157 s8 temp[ADT7470_TEMP_COUNT];
158 s8 temp_min[ADT7470_TEMP_COUNT];
159 s8 temp_max[ADT7470_TEMP_COUNT];
160 u16 fan[ADT7470_FAN_COUNT];
161 u16 fan_min[ADT7470_FAN_COUNT];
162 u16 fan_max[ADT7470_FAN_COUNT];
163 u16 alarm;
164 u16 alarms_mask;
165 u8 force_pwm_max;
166 u8 pwm[ADT7470_PWM_COUNT];
167 u8 pwm_max[ADT7470_PWM_COUNT];
168 u8 pwm_automatic[ADT7470_PWM_COUNT];
169 u8 pwm_min[ADT7470_PWM_COUNT];
170 s8 pwm_tmin[ADT7470_PWM_COUNT];
171 u8 pwm_auto_temp[ADT7470_PWM_COUNT];
172
173 struct task_struct *auto_update;
174 struct completion auto_update_stop;
175 unsigned int auto_update_interval;
176};
177
178static int adt7470_probe(struct i2c_client *client,
179 const struct i2c_device_id *id);
180static int adt7470_detect(struct i2c_client *client,
181 struct i2c_board_info *info);
182static int adt7470_remove(struct i2c_client *client);
183
184static const struct i2c_device_id adt7470_id[] = {
185 { "adt7470", 0 },
186 { }
187};
188MODULE_DEVICE_TABLE(i2c, adt7470_id);
189
190static struct i2c_driver adt7470_driver = {
191 .class = I2C_CLASS_HWMON,
192 .driver = {
193 .name = "adt7470",
194 },
195 .probe = adt7470_probe,
196 .remove = adt7470_remove,
197 .id_table = adt7470_id,
198 .detect = adt7470_detect,
199 .address_list = normal_i2c,
200};
201
202/*
203 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says
204 * that the low byte must be read before the high byte.
205 */
206static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
207{
208 u16 foo;
209 foo = i2c_smbus_read_byte_data(client, reg);
210 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
211 return foo;
212}
213
214static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
215 u16 value)
216{
217 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
218 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
219}
220
221static void adt7470_init_client(struct i2c_client *client)
222{
223 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
224
225 if (reg < 0) {
226 dev_err(&client->dev, "cannot read configuration register\n");
227 } else {
228 /* start monitoring (and do a self-test) */
229 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
230 }
231}
232
233/* Probe for temperature sensors. Assumes lock is held */
234static int adt7470_read_temperatures(struct i2c_client *client,
235 struct adt7470_data *data)
236{
237 unsigned long res;
238 int i;
239 u8 cfg, pwm[4], pwm_cfg[2];
240
241 /* save pwm[1-4] config register */
242 pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
243 pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
244
245 /* set manual pwm to whatever it is set to now */
246 for (i = 0; i < ADT7470_FAN_COUNT; i++)
247 pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
248
249 /* put pwm in manual mode */
250 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
251 pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
252 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
253 pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
254
255 /* write pwm control to whatever it was */
256 for (i = 0; i < ADT7470_FAN_COUNT; i++)
257 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
258
259 /* start reading temperature sensors */
260 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
261 cfg |= 0x80;
262 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
263
264 /* Delay is 200ms * number of temp sensors. */
265 res = msleep_interruptible((data->num_temp_sensors >= 0 ?
266 data->num_temp_sensors * 200 :
267 TEMP_COLLECTION_TIME));
268
269 /* done reading temperature sensors */
270 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
271 cfg &= ~0x80;
272 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
273
274 /* restore pwm[1-4] config registers */
275 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
276 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
277
278 if (res) {
279 pr_err("ha ha, interrupted\n");
280 return -EAGAIN;
281 }
282
283 /* Only count fans if we have to */
284 if (data->num_temp_sensors >= 0)
285 return 0;
286
287 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
288 data->temp[i] = i2c_smbus_read_byte_data(client,
289 ADT7470_TEMP_REG(i));
290 if (data->temp[i])
291 data->num_temp_sensors = i + 1;
292 }
293 data->temperatures_probed = 1;
294 return 0;
295}
296
297static int adt7470_update_thread(void *p)
298{
299 struct i2c_client *client = p;
300 struct adt7470_data *data = i2c_get_clientdata(client);
301
302 while (!kthread_should_stop()) {
303 mutex_lock(&data->lock);
304 adt7470_read_temperatures(client, data);
305 mutex_unlock(&data->lock);
306 if (kthread_should_stop())
307 break;
308 msleep_interruptible(data->auto_update_interval);
309 }
310
311 complete_all(&data->auto_update_stop);
312 return 0;
313}
314
315static struct adt7470_data *adt7470_update_device(struct device *dev)
316{
317 struct i2c_client *client = to_i2c_client(dev);
318 struct adt7470_data *data = i2c_get_clientdata(client);
319 unsigned long local_jiffies = jiffies;
320 u8 cfg;
321 int i;
322 int need_sensors = 1;
323 int need_limits = 1;
324
325 /*
326 * Figure out if we need to update the shadow registers.
327 * Lockless means that we may occasionally report out of
328 * date data.
329 */
330 if (time_before(local_jiffies, data->sensors_last_updated +
331 SENSOR_REFRESH_INTERVAL) &&
332 data->sensors_valid)
333 need_sensors = 0;
334
335 if (time_before(local_jiffies, data->limits_last_updated +
336 LIMIT_REFRESH_INTERVAL) &&
337 data->limits_valid)
338 need_limits = 0;
339
340 if (!need_sensors && !need_limits)
341 return data;
342
343 mutex_lock(&data->lock);
344 if (!need_sensors)
345 goto no_sensor_update;
346
347 if (!data->temperatures_probed)
348 adt7470_read_temperatures(client, data);
349 else
350 for (i = 0; i < ADT7470_TEMP_COUNT; i++)
351 data->temp[i] = i2c_smbus_read_byte_data(client,
352 ADT7470_TEMP_REG(i));
353
354 for (i = 0; i < ADT7470_FAN_COUNT; i++)
355 data->fan[i] = adt7470_read_word_data(client,
356 ADT7470_REG_FAN(i));
357
358 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
359 int reg;
360 int reg_mask;
361
362 data->pwm[i] = i2c_smbus_read_byte_data(client,
363 ADT7470_REG_PWM(i));
364
365 if (i % 2)
366 reg_mask = ADT7470_PWM2_AUTO_MASK;
367 else
368 reg_mask = ADT7470_PWM1_AUTO_MASK;
369
370 reg = ADT7470_REG_PWM_CFG(i);
371 if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
372 data->pwm_automatic[i] = 1;
373 else
374 data->pwm_automatic[i] = 0;
375
376 reg = ADT7470_REG_PWM_AUTO_TEMP(i);
377 cfg = i2c_smbus_read_byte_data(client, reg);
378 if (!(i % 2))
379 data->pwm_auto_temp[i] = cfg >> 4;
380 else
381 data->pwm_auto_temp[i] = cfg & 0xF;
382 }
383
384 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
385 ADT7470_FSPD_MASK)
386 data->force_pwm_max = 1;
387 else
388 data->force_pwm_max = 0;
389
390 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
391 if (data->alarm & ADT7470_OOL_ALARM)
392 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
393 ADT7470_REG_ALARM2));
394 data->alarms_mask = adt7470_read_word_data(client,
395 ADT7470_REG_ALARM1_MASK);
396
397 data->sensors_last_updated = local_jiffies;
398 data->sensors_valid = 1;
399
400no_sensor_update:
401 if (!need_limits)
402 goto out;
403
404 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
405 data->temp_min[i] = i2c_smbus_read_byte_data(client,
406 ADT7470_TEMP_MIN_REG(i));
407 data->temp_max[i] = i2c_smbus_read_byte_data(client,
408 ADT7470_TEMP_MAX_REG(i));
409 }
410
411 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
412 data->fan_min[i] = adt7470_read_word_data(client,
413 ADT7470_REG_FAN_MIN(i));
414 data->fan_max[i] = adt7470_read_word_data(client,
415 ADT7470_REG_FAN_MAX(i));
416 }
417
418 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
419 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
420 ADT7470_REG_PWM_MAX(i));
421 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
422 ADT7470_REG_PWM_MIN(i));
423 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
424 ADT7470_REG_PWM_TMIN(i));
425 }
426
427 data->limits_last_updated = local_jiffies;
428 data->limits_valid = 1;
429
430out:
431 mutex_unlock(&data->lock);
432 return data;
433}
434
435static ssize_t show_auto_update_interval(struct device *dev,
436 struct device_attribute *devattr,
437 char *buf)
438{
439 struct adt7470_data *data = adt7470_update_device(dev);
440 return sprintf(buf, "%d\n", data->auto_update_interval);
441}
442
443static ssize_t set_auto_update_interval(struct device *dev,
444 struct device_attribute *devattr,
445 const char *buf,
446 size_t count)
447{
448 struct i2c_client *client = to_i2c_client(dev);
449 struct adt7470_data *data = i2c_get_clientdata(client);
450 long temp;
451
452 if (strict_strtol(buf, 10, &temp))
453 return -EINVAL;
454
455 temp = SENSORS_LIMIT(temp, 0, 60000);
456
457 mutex_lock(&data->lock);
458 data->auto_update_interval = temp;
459 mutex_unlock(&data->lock);
460
461 return count;
462}
463
464static ssize_t show_num_temp_sensors(struct device *dev,
465 struct device_attribute *devattr,
466 char *buf)
467{
468 struct adt7470_data *data = adt7470_update_device(dev);
469 return sprintf(buf, "%d\n", data->num_temp_sensors);
470}
471
472static ssize_t set_num_temp_sensors(struct device *dev,
473 struct device_attribute *devattr,
474 const char *buf,
475 size_t count)
476{
477 struct i2c_client *client = to_i2c_client(dev);
478 struct adt7470_data *data = i2c_get_clientdata(client);
479 long temp;
480
481 if (strict_strtol(buf, 10, &temp))
482 return -EINVAL;
483
484 temp = SENSORS_LIMIT(temp, -1, 10);
485
486 mutex_lock(&data->lock);
487 data->num_temp_sensors = temp;
488 if (temp < 0)
489 data->temperatures_probed = 0;
490 mutex_unlock(&data->lock);
491
492 return count;
493}
494
495static ssize_t show_temp_min(struct device *dev,
496 struct device_attribute *devattr,
497 char *buf)
498{
499 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
500 struct adt7470_data *data = adt7470_update_device(dev);
501 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
502}
503
504static ssize_t set_temp_min(struct device *dev,
505 struct device_attribute *devattr,
506 const char *buf,
507 size_t count)
508{
509 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
510 struct i2c_client *client = to_i2c_client(dev);
511 struct adt7470_data *data = i2c_get_clientdata(client);
512 long temp;
513
514 if (strict_strtol(buf, 10, &temp))
515 return -EINVAL;
516
517 temp = DIV_ROUND_CLOSEST(temp, 1000);
518 temp = SENSORS_LIMIT(temp, 0, 255);
519
520 mutex_lock(&data->lock);
521 data->temp_min[attr->index] = temp;
522 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
523 temp);
524 mutex_unlock(&data->lock);
525
526 return count;
527}
528
529static ssize_t show_temp_max(struct device *dev,
530 struct device_attribute *devattr,
531 char *buf)
532{
533 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
534 struct adt7470_data *data = adt7470_update_device(dev);
535 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
536}
537
538static ssize_t set_temp_max(struct device *dev,
539 struct device_attribute *devattr,
540 const char *buf,
541 size_t count)
542{
543 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
544 struct i2c_client *client = to_i2c_client(dev);
545 struct adt7470_data *data = i2c_get_clientdata(client);
546 long temp;
547
548 if (strict_strtol(buf, 10, &temp))
549 return -EINVAL;
550
551 temp = DIV_ROUND_CLOSEST(temp, 1000);
552 temp = SENSORS_LIMIT(temp, 0, 255);
553
554 mutex_lock(&data->lock);
555 data->temp_max[attr->index] = temp;
556 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
557 temp);
558 mutex_unlock(&data->lock);
559
560 return count;
561}
562
563static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
564 char *buf)
565{
566 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
567 struct adt7470_data *data = adt7470_update_device(dev);
568 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
569}
570
571static ssize_t show_alarm_mask(struct device *dev,
572 struct device_attribute *devattr,
573 char *buf)
574{
575 struct adt7470_data *data = adt7470_update_device(dev);
576
577 return sprintf(buf, "%x\n", data->alarms_mask);
578}
579
580static ssize_t show_fan_max(struct device *dev,
581 struct device_attribute *devattr,
582 char *buf)
583{
584 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
585 struct adt7470_data *data = adt7470_update_device(dev);
586
587 if (FAN_DATA_VALID(data->fan_max[attr->index]))
588 return sprintf(buf, "%d\n",
589 FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
590 else
591 return sprintf(buf, "0\n");
592}
593
594static ssize_t set_fan_max(struct device *dev,
595 struct device_attribute *devattr,
596 const char *buf, size_t count)
597{
598 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
599 struct i2c_client *client = to_i2c_client(dev);
600 struct adt7470_data *data = i2c_get_clientdata(client);
601 long temp;
602
603 if (strict_strtol(buf, 10, &temp) || !temp)
604 return -EINVAL;
605
606 temp = FAN_RPM_TO_PERIOD(temp);
607 temp = SENSORS_LIMIT(temp, 1, 65534);
608
609 mutex_lock(&data->lock);
610 data->fan_max[attr->index] = temp;
611 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
612 mutex_unlock(&data->lock);
613
614 return count;
615}
616
617static ssize_t show_fan_min(struct device *dev,
618 struct device_attribute *devattr,
619 char *buf)
620{
621 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
622 struct adt7470_data *data = adt7470_update_device(dev);
623
624 if (FAN_DATA_VALID(data->fan_min[attr->index]))
625 return sprintf(buf, "%d\n",
626 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
627 else
628 return sprintf(buf, "0\n");
629}
630
631static ssize_t set_fan_min(struct device *dev,
632 struct device_attribute *devattr,
633 const char *buf, size_t count)
634{
635 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
636 struct i2c_client *client = to_i2c_client(dev);
637 struct adt7470_data *data = i2c_get_clientdata(client);
638 long temp;
639
640 if (strict_strtol(buf, 10, &temp) || !temp)
641 return -EINVAL;
642
643 temp = FAN_RPM_TO_PERIOD(temp);
644 temp = SENSORS_LIMIT(temp, 1, 65534);
645
646 mutex_lock(&data->lock);
647 data->fan_min[attr->index] = temp;
648 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
649 mutex_unlock(&data->lock);
650
651 return count;
652}
653
654static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
655 char *buf)
656{
657 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
658 struct adt7470_data *data = adt7470_update_device(dev);
659
660 if (FAN_DATA_VALID(data->fan[attr->index]))
661 return sprintf(buf, "%d\n",
662 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
663 else
664 return sprintf(buf, "0\n");
665}
666
667static ssize_t show_force_pwm_max(struct device *dev,
668 struct device_attribute *devattr,
669 char *buf)
670{
671 struct adt7470_data *data = adt7470_update_device(dev);
672 return sprintf(buf, "%d\n", data->force_pwm_max);
673}
674
675static ssize_t set_force_pwm_max(struct device *dev,
676 struct device_attribute *devattr,
677 const char *buf,
678 size_t count)
679{
680 struct i2c_client *client = to_i2c_client(dev);
681 struct adt7470_data *data = i2c_get_clientdata(client);
682 long temp;
683 u8 reg;
684
685 if (strict_strtol(buf, 10, &temp))
686 return -EINVAL;
687
688 mutex_lock(&data->lock);
689 data->force_pwm_max = temp;
690 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
691 if (temp)
692 reg |= ADT7470_FSPD_MASK;
693 else
694 reg &= ~ADT7470_FSPD_MASK;
695 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
696 mutex_unlock(&data->lock);
697
698 return count;
699}
700
701static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
702 char *buf)
703{
704 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
705 struct adt7470_data *data = adt7470_update_device(dev);
706 return sprintf(buf, "%d\n", data->pwm[attr->index]);
707}
708
709static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
710 const char *buf, size_t count)
711{
712 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
713 struct i2c_client *client = to_i2c_client(dev);
714 struct adt7470_data *data = i2c_get_clientdata(client);
715 long temp;
716
717 if (strict_strtol(buf, 10, &temp))
718 return -EINVAL;
719
720 temp = SENSORS_LIMIT(temp, 0, 255);
721
722 mutex_lock(&data->lock);
723 data->pwm[attr->index] = temp;
724 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
725 mutex_unlock(&data->lock);
726
727 return count;
728}
729
730static ssize_t show_pwm_max(struct device *dev,
731 struct device_attribute *devattr,
732 char *buf)
733{
734 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
735 struct adt7470_data *data = adt7470_update_device(dev);
736 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
737}
738
739static ssize_t set_pwm_max(struct device *dev,
740 struct device_attribute *devattr,
741 const char *buf,
742 size_t count)
743{
744 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
745 struct i2c_client *client = to_i2c_client(dev);
746 struct adt7470_data *data = i2c_get_clientdata(client);
747 long temp;
748
749 if (strict_strtol(buf, 10, &temp))
750 return -EINVAL;
751
752 temp = SENSORS_LIMIT(temp, 0, 255);
753
754 mutex_lock(&data->lock);
755 data->pwm_max[attr->index] = temp;
756 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
757 temp);
758 mutex_unlock(&data->lock);
759
760 return count;
761}
762
763static ssize_t show_pwm_min(struct device *dev,
764 struct device_attribute *devattr,
765 char *buf)
766{
767 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
768 struct adt7470_data *data = adt7470_update_device(dev);
769 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
770}
771
772static ssize_t set_pwm_min(struct device *dev,
773 struct device_attribute *devattr,
774 const char *buf,
775 size_t count)
776{
777 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
778 struct i2c_client *client = to_i2c_client(dev);
779 struct adt7470_data *data = i2c_get_clientdata(client);
780 long temp;
781
782 if (strict_strtol(buf, 10, &temp))
783 return -EINVAL;
784
785 temp = SENSORS_LIMIT(temp, 0, 255);
786
787 mutex_lock(&data->lock);
788 data->pwm_min[attr->index] = temp;
789 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
790 temp);
791 mutex_unlock(&data->lock);
792
793 return count;
794}
795
796static ssize_t show_pwm_tmax(struct device *dev,
797 struct device_attribute *devattr,
798 char *buf)
799{
800 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
801 struct adt7470_data *data = adt7470_update_device(dev);
802 /* the datasheet says that tmax = tmin + 20C */
803 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
804}
805
806static ssize_t show_pwm_tmin(struct device *dev,
807 struct device_attribute *devattr,
808 char *buf)
809{
810 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
811 struct adt7470_data *data = adt7470_update_device(dev);
812 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
813}
814
815static ssize_t set_pwm_tmin(struct device *dev,
816 struct device_attribute *devattr,
817 const char *buf,
818 size_t count)
819{
820 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
821 struct i2c_client *client = to_i2c_client(dev);
822 struct adt7470_data *data = i2c_get_clientdata(client);
823 long temp;
824
825 if (strict_strtol(buf, 10, &temp))
826 return -EINVAL;
827
828 temp = DIV_ROUND_CLOSEST(temp, 1000);
829 temp = SENSORS_LIMIT(temp, 0, 255);
830
831 mutex_lock(&data->lock);
832 data->pwm_tmin[attr->index] = temp;
833 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
834 temp);
835 mutex_unlock(&data->lock);
836
837 return count;
838}
839
840static ssize_t show_pwm_auto(struct device *dev,
841 struct device_attribute *devattr,
842 char *buf)
843{
844 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
845 struct adt7470_data *data = adt7470_update_device(dev);
846 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
847}
848
849static ssize_t set_pwm_auto(struct device *dev,
850 struct device_attribute *devattr,
851 const char *buf,
852 size_t count)
853{
854 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
855 struct i2c_client *client = to_i2c_client(dev);
856 struct adt7470_data *data = i2c_get_clientdata(client);
857 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
858 int pwm_auto_reg_mask;
859 long temp;
860 u8 reg;
861
862 if (strict_strtol(buf, 10, &temp))
863 return -EINVAL;
864
865 if (attr->index % 2)
866 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
867 else
868 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
869
870 if (temp != 2 && temp != 1)
871 return -EINVAL;
872 temp--;
873
874 mutex_lock(&data->lock);
875 data->pwm_automatic[attr->index] = temp;
876 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
877 if (temp)
878 reg |= pwm_auto_reg_mask;
879 else
880 reg &= ~pwm_auto_reg_mask;
881 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
882 mutex_unlock(&data->lock);
883
884 return count;
885}
886
887static ssize_t show_pwm_auto_temp(struct device *dev,
888 struct device_attribute *devattr,
889 char *buf)
890{
891 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
892 struct adt7470_data *data = adt7470_update_device(dev);
893 u8 ctrl = data->pwm_auto_temp[attr->index];
894
895 if (ctrl)
896 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
897 else
898 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
899}
900
901static int cvt_auto_temp(int input)
902{
903 if (input == ADT7470_PWM_ALL_TEMPS)
904 return 0;
905 if (input < 1 || !is_power_of_2(input))
906 return -EINVAL;
907 return ilog2(input) + 1;
908}
909
910static ssize_t set_pwm_auto_temp(struct device *dev,
911 struct device_attribute *devattr,
912 const char *buf,
913 size_t count)
914{
915 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
916 struct i2c_client *client = to_i2c_client(dev);
917 struct adt7470_data *data = i2c_get_clientdata(client);
918 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
919 long temp;
920 u8 reg;
921
922 if (strict_strtol(buf, 10, &temp))
923 return -EINVAL;
924
925 temp = cvt_auto_temp(temp);
926 if (temp < 0)
927 return temp;
928
929 mutex_lock(&data->lock);
930 data->pwm_automatic[attr->index] = temp;
931 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
932
933 if (!(attr->index % 2)) {
934 reg &= 0xF;
935 reg |= (temp << 4) & 0xF0;
936 } else {
937 reg &= 0xF0;
938 reg |= temp & 0xF;
939 }
940
941 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
942 mutex_unlock(&data->lock);
943
944 return count;
945}
946
947static ssize_t show_alarm(struct device *dev,
948 struct device_attribute *devattr,
949 char *buf)
950{
951 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
952 struct adt7470_data *data = adt7470_update_device(dev);
953
954 if (data->alarm & attr->index)
955 return sprintf(buf, "1\n");
956 else
957 return sprintf(buf, "0\n");
958}
959
960static DEVICE_ATTR(alarm_mask, S_IRUGO, show_alarm_mask, NULL);
961static DEVICE_ATTR(num_temp_sensors, S_IWUSR | S_IRUGO, show_num_temp_sensors,
962 set_num_temp_sensors);
963static DEVICE_ATTR(auto_update_interval, S_IWUSR | S_IRUGO,
964 show_auto_update_interval, set_auto_update_interval);
965
966static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
967 set_temp_max, 0);
968static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
969 set_temp_max, 1);
970static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
971 set_temp_max, 2);
972static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max,
973 set_temp_max, 3);
974static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max,
975 set_temp_max, 4);
976static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max,
977 set_temp_max, 5);
978static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max,
979 set_temp_max, 6);
980static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max,
981 set_temp_max, 7);
982static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max,
983 set_temp_max, 8);
984static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max,
985 set_temp_max, 9);
986
987static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
988 set_temp_min, 0);
989static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
990 set_temp_min, 1);
991static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
992 set_temp_min, 2);
993static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min,
994 set_temp_min, 3);
995static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min,
996 set_temp_min, 4);
997static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min,
998 set_temp_min, 5);
999static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min,
1000 set_temp_min, 6);
1001static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min,
1002 set_temp_min, 7);
1003static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min,
1004 set_temp_min, 8);
1005static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min,
1006 set_temp_min, 9);
1007
1008static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
1009static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
1010static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
1011static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
1012static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
1013static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
1014static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
1015static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
1016static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8);
1017static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9);
1018
1019static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
1020 ADT7470_R1T_ALARM);
1021static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
1022 ADT7470_R2T_ALARM);
1023static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
1024 ADT7470_R3T_ALARM);
1025static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL,
1026 ADT7470_R4T_ALARM);
1027static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL,
1028 ADT7470_R5T_ALARM);
1029static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL,
1030 ADT7470_R6T_ALARM);
1031static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL,
1032 ADT7470_R7T_ALARM);
1033static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL,
1034 ALARM2(ADT7470_R8T_ALARM));
1035static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL,
1036 ALARM2(ADT7470_R9T_ALARM));
1037static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL,
1038 ALARM2(ADT7470_R10T_ALARM));
1039
1040static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
1041 set_fan_max, 0);
1042static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
1043 set_fan_max, 1);
1044static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
1045 set_fan_max, 2);
1046static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max,
1047 set_fan_max, 3);
1048
1049static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
1050 set_fan_min, 0);
1051static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
1052 set_fan_min, 1);
1053static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
1054 set_fan_min, 2);
1055static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
1056 set_fan_min, 3);
1057
1058static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
1059static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
1060static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
1061static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
1062
1063static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
1064 ALARM2(ADT7470_FAN1_ALARM));
1065static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
1066 ALARM2(ADT7470_FAN2_ALARM));
1067static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
1068 ALARM2(ADT7470_FAN3_ALARM));
1069static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
1070 ALARM2(ADT7470_FAN4_ALARM));
1071
1072static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO,
1073 show_force_pwm_max, set_force_pwm_max, 0);
1074
1075static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
1076static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
1077static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
1078static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
1079
1080static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
1081 show_pwm_min, set_pwm_min, 0);
1082static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
1083 show_pwm_min, set_pwm_min, 1);
1084static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
1085 show_pwm_min, set_pwm_min, 2);
1086static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO,
1087 show_pwm_min, set_pwm_min, 3);
1088
1089static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
1090 show_pwm_max, set_pwm_max, 0);
1091static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
1092 show_pwm_max, set_pwm_max, 1);
1093static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
1094 show_pwm_max, set_pwm_max, 2);
1095static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO,
1096 show_pwm_max, set_pwm_max, 3);
1097
1098static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
1099 show_pwm_tmin, set_pwm_tmin, 0);
1100static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO,
1101 show_pwm_tmin, set_pwm_tmin, 1);
1102static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO,
1103 show_pwm_tmin, set_pwm_tmin, 2);
1104static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO,
1105 show_pwm_tmin, set_pwm_tmin, 3);
1106
1107static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1108 NULL, 0);
1109static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1110 NULL, 1);
1111static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1112 NULL, 2);
1113static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1114 NULL, 3);
1115
1116static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1117 set_pwm_auto, 0);
1118static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1119 set_pwm_auto, 1);
1120static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1121 set_pwm_auto, 2);
1122static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1123 set_pwm_auto, 3);
1124
1125static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
1126 show_pwm_auto_temp, set_pwm_auto_temp, 0);
1127static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
1128 show_pwm_auto_temp, set_pwm_auto_temp, 1);
1129static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
1130 show_pwm_auto_temp, set_pwm_auto_temp, 2);
1131static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
1132 show_pwm_auto_temp, set_pwm_auto_temp, 3);
1133
1134static struct attribute *adt7470_attr[] =
1135{
1136 &dev_attr_alarm_mask.attr,
1137 &dev_attr_num_temp_sensors.attr,
1138 &dev_attr_auto_update_interval.attr,
1139 &sensor_dev_attr_temp1_max.dev_attr.attr,
1140 &sensor_dev_attr_temp2_max.dev_attr.attr,
1141 &sensor_dev_attr_temp3_max.dev_attr.attr,
1142 &sensor_dev_attr_temp4_max.dev_attr.attr,
1143 &sensor_dev_attr_temp5_max.dev_attr.attr,
1144 &sensor_dev_attr_temp6_max.dev_attr.attr,
1145 &sensor_dev_attr_temp7_max.dev_attr.attr,
1146 &sensor_dev_attr_temp8_max.dev_attr.attr,
1147 &sensor_dev_attr_temp9_max.dev_attr.attr,
1148 &sensor_dev_attr_temp10_max.dev_attr.attr,
1149 &sensor_dev_attr_temp1_min.dev_attr.attr,
1150 &sensor_dev_attr_temp2_min.dev_attr.attr,
1151 &sensor_dev_attr_temp3_min.dev_attr.attr,
1152 &sensor_dev_attr_temp4_min.dev_attr.attr,
1153 &sensor_dev_attr_temp5_min.dev_attr.attr,
1154 &sensor_dev_attr_temp6_min.dev_attr.attr,
1155 &sensor_dev_attr_temp7_min.dev_attr.attr,
1156 &sensor_dev_attr_temp8_min.dev_attr.attr,
1157 &sensor_dev_attr_temp9_min.dev_attr.attr,
1158 &sensor_dev_attr_temp10_min.dev_attr.attr,
1159 &sensor_dev_attr_temp1_input.dev_attr.attr,
1160 &sensor_dev_attr_temp2_input.dev_attr.attr,
1161 &sensor_dev_attr_temp3_input.dev_attr.attr,
1162 &sensor_dev_attr_temp4_input.dev_attr.attr,
1163 &sensor_dev_attr_temp5_input.dev_attr.attr,
1164 &sensor_dev_attr_temp6_input.dev_attr.attr,
1165 &sensor_dev_attr_temp7_input.dev_attr.attr,
1166 &sensor_dev_attr_temp8_input.dev_attr.attr,
1167 &sensor_dev_attr_temp9_input.dev_attr.attr,
1168 &sensor_dev_attr_temp10_input.dev_attr.attr,
1169 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1170 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1171 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1172 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
1173 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
1174 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
1175 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
1176 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
1177 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
1178 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
1179 &sensor_dev_attr_fan1_max.dev_attr.attr,
1180 &sensor_dev_attr_fan2_max.dev_attr.attr,
1181 &sensor_dev_attr_fan3_max.dev_attr.attr,
1182 &sensor_dev_attr_fan4_max.dev_attr.attr,
1183 &sensor_dev_attr_fan1_min.dev_attr.attr,
1184 &sensor_dev_attr_fan2_min.dev_attr.attr,
1185 &sensor_dev_attr_fan3_min.dev_attr.attr,
1186 &sensor_dev_attr_fan4_min.dev_attr.attr,
1187 &sensor_dev_attr_fan1_input.dev_attr.attr,
1188 &sensor_dev_attr_fan2_input.dev_attr.attr,
1189 &sensor_dev_attr_fan3_input.dev_attr.attr,
1190 &sensor_dev_attr_fan4_input.dev_attr.attr,
1191 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1192 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1193 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1194 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1195 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1196 &sensor_dev_attr_pwm1.dev_attr.attr,
1197 &sensor_dev_attr_pwm2.dev_attr.attr,
1198 &sensor_dev_attr_pwm3.dev_attr.attr,
1199 &sensor_dev_attr_pwm4.dev_attr.attr,
1200 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1201 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1202 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1203 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1204 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1205 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1206 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1207 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1208 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1209 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1210 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1211 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1212 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1213 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1214 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1215 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1216 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1217 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1218 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1219 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1220 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1221 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1222 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1223 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1224 NULL
1225};
1226
1227/* Return 0 if detection is successful, -ENODEV otherwise */
1228static int adt7470_detect(struct i2c_client *client,
1229 struct i2c_board_info *info)
1230{
1231 struct i2c_adapter *adapter = client->adapter;
1232 int vendor, device, revision;
1233
1234 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1235 return -ENODEV;
1236
1237 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1238 if (vendor != ADT7470_VENDOR)
1239 return -ENODEV;
1240
1241 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1242 if (device != ADT7470_DEVICE)
1243 return -ENODEV;
1244
1245 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
1246 if (revision != ADT7470_REVISION)
1247 return -ENODEV;
1248
1249 strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1250
1251 return 0;
1252}
1253
1254static int adt7470_probe(struct i2c_client *client,
1255 const struct i2c_device_id *id)
1256{
1257 struct adt7470_data *data;
1258 int err;
1259
1260 data = kzalloc(sizeof(struct adt7470_data), GFP_KERNEL);
1261 if (!data) {
1262 err = -ENOMEM;
1263 goto exit;
1264 }
1265
1266 data->num_temp_sensors = -1;
1267 data->auto_update_interval = AUTO_UPDATE_INTERVAL;
1268
1269 i2c_set_clientdata(client, data);
1270 mutex_init(&data->lock);
1271
1272 dev_info(&client->dev, "%s chip found\n", client->name);
1273
1274 /* Initialize the ADT7470 chip */
1275 adt7470_init_client(client);
1276
1277 /* Register sysfs hooks */
1278 data->attrs.attrs = adt7470_attr;
1279 if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
1280 goto exit_free;
1281
1282 data->hwmon_dev = hwmon_device_register(&client->dev);
1283 if (IS_ERR(data->hwmon_dev)) {
1284 err = PTR_ERR(data->hwmon_dev);
1285 goto exit_remove;
1286 }
1287
1288 init_completion(&data->auto_update_stop);
1289 data->auto_update = kthread_run(adt7470_update_thread, client,
1290 dev_name(data->hwmon_dev));
1291 if (IS_ERR(data->auto_update)) {
1292 err = PTR_ERR(data->auto_update);
1293 goto exit_unregister;
1294 }
1295
1296 return 0;
1297
1298exit_unregister:
1299 hwmon_device_unregister(data->hwmon_dev);
1300exit_remove:
1301 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1302exit_free:
1303 kfree(data);
1304exit:
1305 return err;
1306}
1307
1308static int adt7470_remove(struct i2c_client *client)
1309{
1310 struct adt7470_data *data = i2c_get_clientdata(client);
1311
1312 kthread_stop(data->auto_update);
1313 wait_for_completion(&data->auto_update_stop);
1314 hwmon_device_unregister(data->hwmon_dev);
1315 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1316 kfree(data);
1317 return 0;
1318}
1319
1320static int __init adt7470_init(void)
1321{
1322 return i2c_add_driver(&adt7470_driver);
1323}
1324
1325static void __exit adt7470_exit(void)
1326{
1327 i2c_del_driver(&adt7470_driver);
1328}
1329
1330MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1331MODULE_DESCRIPTION("ADT7470 driver");
1332MODULE_LICENSE("GPL");
1333
1334module_init(adt7470_init);
1335module_exit(adt7470_exit);
1/*
2 * A hwmon driver for the Analog Devices ADT7470
3 * Copyright (C) 2007 IBM
4 *
5 * Author: Darrick J. Wong <darrick.wong@oracle.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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24#include <linux/module.h>
25#include <linux/jiffies.h>
26#include <linux/i2c.h>
27#include <linux/hwmon.h>
28#include <linux/hwmon-sysfs.h>
29#include <linux/err.h>
30#include <linux/mutex.h>
31#include <linux/delay.h>
32#include <linux/log2.h>
33#include <linux/kthread.h>
34#include <linux/slab.h>
35#include <linux/util_macros.h>
36
37/* Addresses to scan */
38static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
39
40/* ADT7470 registers */
41#define ADT7470_REG_BASE_ADDR 0x20
42#define ADT7470_REG_TEMP_BASE_ADDR 0x20
43#define ADT7470_REG_TEMP_MAX_ADDR 0x29
44#define ADT7470_REG_FAN_BASE_ADDR 0x2A
45#define ADT7470_REG_FAN_MAX_ADDR 0x31
46#define ADT7470_REG_PWM_BASE_ADDR 0x32
47#define ADT7470_REG_PWM_MAX_ADDR 0x35
48#define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
49#define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
50#define ADT7470_REG_CFG 0x40
51#define ADT7470_FSPD_MASK 0x04
52#define ADT7470_REG_ALARM1 0x41
53#define ADT7470_R1T_ALARM 0x01
54#define ADT7470_R2T_ALARM 0x02
55#define ADT7470_R3T_ALARM 0x04
56#define ADT7470_R4T_ALARM 0x08
57#define ADT7470_R5T_ALARM 0x10
58#define ADT7470_R6T_ALARM 0x20
59#define ADT7470_R7T_ALARM 0x40
60#define ADT7470_OOL_ALARM 0x80
61#define ADT7470_REG_ALARM2 0x42
62#define ADT7470_R8T_ALARM 0x01
63#define ADT7470_R9T_ALARM 0x02
64#define ADT7470_R10T_ALARM 0x04
65#define ADT7470_FAN1_ALARM 0x10
66#define ADT7470_FAN2_ALARM 0x20
67#define ADT7470_FAN3_ALARM 0x40
68#define ADT7470_FAN4_ALARM 0x80
69#define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
70#define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
71#define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
72#define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
73#define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
74#define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
75#define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
76#define ADT7470_REG_PWM12_CFG 0x68
77#define ADT7470_PWM2_AUTO_MASK 0x40
78#define ADT7470_PWM1_AUTO_MASK 0x80
79#define ADT7470_PWM_AUTO_MASK 0xC0
80#define ADT7470_REG_PWM34_CFG 0x69
81#define ADT7470_PWM3_AUTO_MASK 0x40
82#define ADT7470_PWM4_AUTO_MASK 0x80
83#define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
84#define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
85#define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
86#define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
87#define ADT7470_REG_CFG_2 0x74
88#define ADT7470_REG_ACOUSTICS12 0x75
89#define ADT7470_REG_ACOUSTICS34 0x76
90#define ADT7470_REG_DEVICE 0x3D
91#define ADT7470_REG_VENDOR 0x3E
92#define ADT7470_REG_REVISION 0x3F
93#define ADT7470_REG_ALARM1_MASK 0x72
94#define ADT7470_REG_ALARM2_MASK 0x73
95#define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
96#define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
97#define ADT7470_REG_MAX_ADDR 0x81
98
99#define ADT7470_TEMP_COUNT 10
100#define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
101#define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
102#define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
103 ((x) * 2) + 1)
104
105#define ADT7470_FAN_COUNT 4
106#define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
107#define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
108#define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
109
110#define ADT7470_PWM_COUNT 4
111#define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
112#define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
113#define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
114#define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
115#define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
116#define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
117 ((x) / 2))
118
119#define ALARM2(x) ((x) << 8)
120
121#define ADT7470_VENDOR 0x41
122#define ADT7470_DEVICE 0x70
123/* datasheet only mentions a revision 2 */
124#define ADT7470_REVISION 0x02
125
126/* "all temps" according to hwmon sysfs interface spec */
127#define ADT7470_PWM_ALL_TEMPS 0x3FF
128
129/* How often do we reread sensors values? (In jiffies) */
130#define SENSOR_REFRESH_INTERVAL (5 * HZ)
131
132/* How often do we reread sensor limit values? (In jiffies) */
133#define LIMIT_REFRESH_INTERVAL (60 * HZ)
134
135/* Wait at least 200ms per sensor for 10 sensors */
136#define TEMP_COLLECTION_TIME 2000
137
138/* auto update thing won't fire more than every 2s */
139#define AUTO_UPDATE_INTERVAL 2000
140
141/* datasheet says to divide this number by the fan reading to get fan rpm */
142#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
143#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
144#define FAN_PERIOD_INVALID 65535
145#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
146
147/* Config registers 1 and 2 include fields for selecting the PWM frequency */
148#define ADT7470_CFG_LF 0x40
149#define ADT7470_FREQ_MASK 0x70
150#define ADT7470_FREQ_SHIFT 4
151
152struct adt7470_data {
153 struct i2c_client *client;
154 struct mutex lock;
155 char sensors_valid;
156 char limits_valid;
157 unsigned long sensors_last_updated; /* In jiffies */
158 unsigned long limits_last_updated; /* In jiffies */
159
160 int num_temp_sensors; /* -1 = probe */
161 int temperatures_probed;
162
163 s8 temp[ADT7470_TEMP_COUNT];
164 s8 temp_min[ADT7470_TEMP_COUNT];
165 s8 temp_max[ADT7470_TEMP_COUNT];
166 u16 fan[ADT7470_FAN_COUNT];
167 u16 fan_min[ADT7470_FAN_COUNT];
168 u16 fan_max[ADT7470_FAN_COUNT];
169 u16 alarm;
170 u16 alarms_mask;
171 u8 force_pwm_max;
172 u8 pwm[ADT7470_PWM_COUNT];
173 u8 pwm_max[ADT7470_PWM_COUNT];
174 u8 pwm_automatic[ADT7470_PWM_COUNT];
175 u8 pwm_min[ADT7470_PWM_COUNT];
176 s8 pwm_tmin[ADT7470_PWM_COUNT];
177 u8 pwm_auto_temp[ADT7470_PWM_COUNT];
178
179 struct task_struct *auto_update;
180 unsigned int auto_update_interval;
181};
182
183/*
184 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says
185 * that the low byte must be read before the high byte.
186 */
187static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
188{
189 u16 foo;
190 foo = i2c_smbus_read_byte_data(client, reg);
191 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
192 return foo;
193}
194
195static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
196 u16 value)
197{
198 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
199 || i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
200}
201
202/* Probe for temperature sensors. Assumes lock is held */
203static int adt7470_read_temperatures(struct i2c_client *client,
204 struct adt7470_data *data)
205{
206 unsigned long res;
207 int i;
208 u8 cfg, pwm[4], pwm_cfg[2];
209
210 /* save pwm[1-4] config register */
211 pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
212 pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
213
214 /* set manual pwm to whatever it is set to now */
215 for (i = 0; i < ADT7470_FAN_COUNT; i++)
216 pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
217
218 /* put pwm in manual mode */
219 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
220 pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
221 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
222 pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
223
224 /* write pwm control to whatever it was */
225 for (i = 0; i < ADT7470_FAN_COUNT; i++)
226 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
227
228 /* start reading temperature sensors */
229 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
230 cfg |= 0x80;
231 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
232
233 /* Delay is 200ms * number of temp sensors. */
234 res = msleep_interruptible((data->num_temp_sensors >= 0 ?
235 data->num_temp_sensors * 200 :
236 TEMP_COLLECTION_TIME));
237
238 /* done reading temperature sensors */
239 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
240 cfg &= ~0x80;
241 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
242
243 /* restore pwm[1-4] config registers */
244 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
245 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
246
247 if (res) {
248 pr_err("ha ha, interrupted\n");
249 return -EAGAIN;
250 }
251
252 /* Only count fans if we have to */
253 if (data->num_temp_sensors >= 0)
254 return 0;
255
256 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
257 data->temp[i] = i2c_smbus_read_byte_data(client,
258 ADT7470_TEMP_REG(i));
259 if (data->temp[i])
260 data->num_temp_sensors = i + 1;
261 }
262 data->temperatures_probed = 1;
263 return 0;
264}
265
266static int adt7470_update_thread(void *p)
267{
268 struct i2c_client *client = p;
269 struct adt7470_data *data = i2c_get_clientdata(client);
270
271 while (!kthread_should_stop()) {
272 mutex_lock(&data->lock);
273 adt7470_read_temperatures(client, data);
274 mutex_unlock(&data->lock);
275
276 set_current_state(TASK_INTERRUPTIBLE);
277 if (kthread_should_stop())
278 break;
279
280 schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
281 }
282
283 return 0;
284}
285
286static struct adt7470_data *adt7470_update_device(struct device *dev)
287{
288 struct adt7470_data *data = dev_get_drvdata(dev);
289 struct i2c_client *client = data->client;
290 unsigned long local_jiffies = jiffies;
291 u8 cfg;
292 int i;
293 int need_sensors = 1;
294 int need_limits = 1;
295
296 /*
297 * Figure out if we need to update the shadow registers.
298 * Lockless means that we may occasionally report out of
299 * date data.
300 */
301 if (time_before(local_jiffies, data->sensors_last_updated +
302 SENSOR_REFRESH_INTERVAL) &&
303 data->sensors_valid)
304 need_sensors = 0;
305
306 if (time_before(local_jiffies, data->limits_last_updated +
307 LIMIT_REFRESH_INTERVAL) &&
308 data->limits_valid)
309 need_limits = 0;
310
311 if (!need_sensors && !need_limits)
312 return data;
313
314 mutex_lock(&data->lock);
315 if (!need_sensors)
316 goto no_sensor_update;
317
318 if (!data->temperatures_probed)
319 adt7470_read_temperatures(client, data);
320 else
321 for (i = 0; i < ADT7470_TEMP_COUNT; i++)
322 data->temp[i] = i2c_smbus_read_byte_data(client,
323 ADT7470_TEMP_REG(i));
324
325 for (i = 0; i < ADT7470_FAN_COUNT; i++)
326 data->fan[i] = adt7470_read_word_data(client,
327 ADT7470_REG_FAN(i));
328
329 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
330 int reg;
331 int reg_mask;
332
333 data->pwm[i] = i2c_smbus_read_byte_data(client,
334 ADT7470_REG_PWM(i));
335
336 if (i % 2)
337 reg_mask = ADT7470_PWM2_AUTO_MASK;
338 else
339 reg_mask = ADT7470_PWM1_AUTO_MASK;
340
341 reg = ADT7470_REG_PWM_CFG(i);
342 if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
343 data->pwm_automatic[i] = 1;
344 else
345 data->pwm_automatic[i] = 0;
346
347 reg = ADT7470_REG_PWM_AUTO_TEMP(i);
348 cfg = i2c_smbus_read_byte_data(client, reg);
349 if (!(i % 2))
350 data->pwm_auto_temp[i] = cfg >> 4;
351 else
352 data->pwm_auto_temp[i] = cfg & 0xF;
353 }
354
355 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
356 ADT7470_FSPD_MASK)
357 data->force_pwm_max = 1;
358 else
359 data->force_pwm_max = 0;
360
361 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
362 if (data->alarm & ADT7470_OOL_ALARM)
363 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
364 ADT7470_REG_ALARM2));
365 data->alarms_mask = adt7470_read_word_data(client,
366 ADT7470_REG_ALARM1_MASK);
367
368 data->sensors_last_updated = local_jiffies;
369 data->sensors_valid = 1;
370
371no_sensor_update:
372 if (!need_limits)
373 goto out;
374
375 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
376 data->temp_min[i] = i2c_smbus_read_byte_data(client,
377 ADT7470_TEMP_MIN_REG(i));
378 data->temp_max[i] = i2c_smbus_read_byte_data(client,
379 ADT7470_TEMP_MAX_REG(i));
380 }
381
382 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
383 data->fan_min[i] = adt7470_read_word_data(client,
384 ADT7470_REG_FAN_MIN(i));
385 data->fan_max[i] = adt7470_read_word_data(client,
386 ADT7470_REG_FAN_MAX(i));
387 }
388
389 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
390 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
391 ADT7470_REG_PWM_MAX(i));
392 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
393 ADT7470_REG_PWM_MIN(i));
394 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
395 ADT7470_REG_PWM_TMIN(i));
396 }
397
398 data->limits_last_updated = local_jiffies;
399 data->limits_valid = 1;
400
401out:
402 mutex_unlock(&data->lock);
403 return data;
404}
405
406static ssize_t show_auto_update_interval(struct device *dev,
407 struct device_attribute *devattr,
408 char *buf)
409{
410 struct adt7470_data *data = adt7470_update_device(dev);
411 return sprintf(buf, "%d\n", data->auto_update_interval);
412}
413
414static ssize_t set_auto_update_interval(struct device *dev,
415 struct device_attribute *devattr,
416 const char *buf,
417 size_t count)
418{
419 struct adt7470_data *data = dev_get_drvdata(dev);
420 long temp;
421
422 if (kstrtol(buf, 10, &temp))
423 return -EINVAL;
424
425 temp = clamp_val(temp, 0, 60000);
426
427 mutex_lock(&data->lock);
428 data->auto_update_interval = temp;
429 mutex_unlock(&data->lock);
430
431 return count;
432}
433
434static ssize_t show_num_temp_sensors(struct device *dev,
435 struct device_attribute *devattr,
436 char *buf)
437{
438 struct adt7470_data *data = adt7470_update_device(dev);
439 return sprintf(buf, "%d\n", data->num_temp_sensors);
440}
441
442static ssize_t set_num_temp_sensors(struct device *dev,
443 struct device_attribute *devattr,
444 const char *buf,
445 size_t count)
446{
447 struct adt7470_data *data = dev_get_drvdata(dev);
448 long temp;
449
450 if (kstrtol(buf, 10, &temp))
451 return -EINVAL;
452
453 temp = clamp_val(temp, -1, 10);
454
455 mutex_lock(&data->lock);
456 data->num_temp_sensors = temp;
457 if (temp < 0)
458 data->temperatures_probed = 0;
459 mutex_unlock(&data->lock);
460
461 return count;
462}
463
464static ssize_t show_temp_min(struct device *dev,
465 struct device_attribute *devattr,
466 char *buf)
467{
468 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
469 struct adt7470_data *data = adt7470_update_device(dev);
470 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
471}
472
473static ssize_t set_temp_min(struct device *dev,
474 struct device_attribute *devattr,
475 const char *buf,
476 size_t count)
477{
478 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
479 struct adt7470_data *data = dev_get_drvdata(dev);
480 struct i2c_client *client = data->client;
481 long temp;
482
483 if (kstrtol(buf, 10, &temp))
484 return -EINVAL;
485
486 temp = clamp_val(temp, -128000, 127000);
487 temp = DIV_ROUND_CLOSEST(temp, 1000);
488
489 mutex_lock(&data->lock);
490 data->temp_min[attr->index] = temp;
491 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
492 temp);
493 mutex_unlock(&data->lock);
494
495 return count;
496}
497
498static ssize_t show_temp_max(struct device *dev,
499 struct device_attribute *devattr,
500 char *buf)
501{
502 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
503 struct adt7470_data *data = adt7470_update_device(dev);
504 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
505}
506
507static ssize_t set_temp_max(struct device *dev,
508 struct device_attribute *devattr,
509 const char *buf,
510 size_t count)
511{
512 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
513 struct adt7470_data *data = dev_get_drvdata(dev);
514 struct i2c_client *client = data->client;
515 long temp;
516
517 if (kstrtol(buf, 10, &temp))
518 return -EINVAL;
519
520 temp = clamp_val(temp, -128000, 127000);
521 temp = DIV_ROUND_CLOSEST(temp, 1000);
522
523 mutex_lock(&data->lock);
524 data->temp_max[attr->index] = temp;
525 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
526 temp);
527 mutex_unlock(&data->lock);
528
529 return count;
530}
531
532static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
533 char *buf)
534{
535 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
536 struct adt7470_data *data = adt7470_update_device(dev);
537 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
538}
539
540static ssize_t show_alarm_mask(struct device *dev,
541 struct device_attribute *devattr,
542 char *buf)
543{
544 struct adt7470_data *data = adt7470_update_device(dev);
545
546 return sprintf(buf, "%x\n", data->alarms_mask);
547}
548
549static ssize_t set_alarm_mask(struct device *dev,
550 struct device_attribute *devattr,
551 const char *buf,
552 size_t count)
553{
554 struct adt7470_data *data = dev_get_drvdata(dev);
555 long mask;
556
557 if (kstrtoul(buf, 0, &mask))
558 return -EINVAL;
559
560 if (mask & ~0xffff)
561 return -EINVAL;
562
563 mutex_lock(&data->lock);
564 data->alarms_mask = mask;
565 adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask);
566 mutex_unlock(&data->lock);
567
568 return count;
569}
570
571static ssize_t show_fan_max(struct device *dev,
572 struct device_attribute *devattr,
573 char *buf)
574{
575 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
576 struct adt7470_data *data = adt7470_update_device(dev);
577
578 if (FAN_DATA_VALID(data->fan_max[attr->index]))
579 return sprintf(buf, "%d\n",
580 FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
581 else
582 return sprintf(buf, "0\n");
583}
584
585static ssize_t set_fan_max(struct device *dev,
586 struct device_attribute *devattr,
587 const char *buf, size_t count)
588{
589 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
590 struct adt7470_data *data = dev_get_drvdata(dev);
591 struct i2c_client *client = data->client;
592 long temp;
593
594 if (kstrtol(buf, 10, &temp) || !temp)
595 return -EINVAL;
596
597 temp = FAN_RPM_TO_PERIOD(temp);
598 temp = clamp_val(temp, 1, 65534);
599
600 mutex_lock(&data->lock);
601 data->fan_max[attr->index] = temp;
602 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
603 mutex_unlock(&data->lock);
604
605 return count;
606}
607
608static ssize_t show_fan_min(struct device *dev,
609 struct device_attribute *devattr,
610 char *buf)
611{
612 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
613 struct adt7470_data *data = adt7470_update_device(dev);
614
615 if (FAN_DATA_VALID(data->fan_min[attr->index]))
616 return sprintf(buf, "%d\n",
617 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
618 else
619 return sprintf(buf, "0\n");
620}
621
622static ssize_t set_fan_min(struct device *dev,
623 struct device_attribute *devattr,
624 const char *buf, size_t count)
625{
626 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
627 struct adt7470_data *data = dev_get_drvdata(dev);
628 struct i2c_client *client = data->client;
629 long temp;
630
631 if (kstrtol(buf, 10, &temp) || !temp)
632 return -EINVAL;
633
634 temp = FAN_RPM_TO_PERIOD(temp);
635 temp = clamp_val(temp, 1, 65534);
636
637 mutex_lock(&data->lock);
638 data->fan_min[attr->index] = temp;
639 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
640 mutex_unlock(&data->lock);
641
642 return count;
643}
644
645static ssize_t show_fan(struct device *dev, 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
651 if (FAN_DATA_VALID(data->fan[attr->index]))
652 return sprintf(buf, "%d\n",
653 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
654 else
655 return sprintf(buf, "0\n");
656}
657
658static ssize_t show_force_pwm_max(struct device *dev,
659 struct device_attribute *devattr,
660 char *buf)
661{
662 struct adt7470_data *data = adt7470_update_device(dev);
663 return sprintf(buf, "%d\n", data->force_pwm_max);
664}
665
666static ssize_t set_force_pwm_max(struct device *dev,
667 struct device_attribute *devattr,
668 const char *buf,
669 size_t count)
670{
671 struct adt7470_data *data = dev_get_drvdata(dev);
672 struct i2c_client *client = data->client;
673 long temp;
674 u8 reg;
675
676 if (kstrtol(buf, 10, &temp))
677 return -EINVAL;
678
679 mutex_lock(&data->lock);
680 data->force_pwm_max = temp;
681 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
682 if (temp)
683 reg |= ADT7470_FSPD_MASK;
684 else
685 reg &= ~ADT7470_FSPD_MASK;
686 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
687 mutex_unlock(&data->lock);
688
689 return count;
690}
691
692static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
693 char *buf)
694{
695 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
696 struct adt7470_data *data = adt7470_update_device(dev);
697 return sprintf(buf, "%d\n", data->pwm[attr->index]);
698}
699
700static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
701 const char *buf, size_t count)
702{
703 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
704 struct adt7470_data *data = dev_get_drvdata(dev);
705 struct i2c_client *client = data->client;
706 long temp;
707
708 if (kstrtol(buf, 10, &temp))
709 return -EINVAL;
710
711 temp = clamp_val(temp, 0, 255);
712
713 mutex_lock(&data->lock);
714 data->pwm[attr->index] = temp;
715 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
716 mutex_unlock(&data->lock);
717
718 return count;
719}
720
721/* These are the valid PWM frequencies to the nearest Hz */
722static const int adt7470_freq_map[] = {
723 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
724};
725
726static ssize_t show_pwm_freq(struct device *dev,
727 struct device_attribute *devattr, char *buf)
728{
729 struct adt7470_data *data = adt7470_update_device(dev);
730 unsigned char cfg_reg_1;
731 unsigned char cfg_reg_2;
732 int index;
733
734 mutex_lock(&data->lock);
735 cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
736 cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
737 mutex_unlock(&data->lock);
738
739 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
740 if (!(cfg_reg_1 & ADT7470_CFG_LF))
741 index += 8;
742 if (index >= ARRAY_SIZE(adt7470_freq_map))
743 index = ARRAY_SIZE(adt7470_freq_map) - 1;
744
745 return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
746}
747
748static ssize_t set_pwm_freq(struct device *dev,
749 struct device_attribute *devattr,
750 const char *buf, size_t count)
751{
752 struct adt7470_data *data = dev_get_drvdata(dev);
753 struct i2c_client *client = data->client;
754 long freq;
755 int index;
756 int low_freq = ADT7470_CFG_LF;
757 unsigned char val;
758
759 if (kstrtol(buf, 10, &freq))
760 return -EINVAL;
761
762 /* Round the user value given to the closest available frequency */
763 index = find_closest(freq, adt7470_freq_map,
764 ARRAY_SIZE(adt7470_freq_map));
765
766 if (index >= 8) {
767 index -= 8;
768 low_freq = 0;
769 }
770
771 mutex_lock(&data->lock);
772 /* Configuration Register 1 */
773 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
774 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
775 (val & ~ADT7470_CFG_LF) | low_freq);
776 /* Configuration Register 2 */
777 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
778 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
779 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
780 mutex_unlock(&data->lock);
781
782 return count;
783}
784
785static ssize_t show_pwm_max(struct device *dev,
786 struct device_attribute *devattr,
787 char *buf)
788{
789 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
790 struct adt7470_data *data = adt7470_update_device(dev);
791 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
792}
793
794static ssize_t set_pwm_max(struct device *dev,
795 struct device_attribute *devattr,
796 const char *buf,
797 size_t count)
798{
799 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
800 struct adt7470_data *data = dev_get_drvdata(dev);
801 struct i2c_client *client = data->client;
802 long temp;
803
804 if (kstrtol(buf, 10, &temp))
805 return -EINVAL;
806
807 temp = clamp_val(temp, 0, 255);
808
809 mutex_lock(&data->lock);
810 data->pwm_max[attr->index] = temp;
811 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
812 temp);
813 mutex_unlock(&data->lock);
814
815 return count;
816}
817
818static ssize_t show_pwm_min(struct device *dev,
819 struct device_attribute *devattr,
820 char *buf)
821{
822 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
823 struct adt7470_data *data = adt7470_update_device(dev);
824 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
825}
826
827static ssize_t set_pwm_min(struct device *dev,
828 struct device_attribute *devattr,
829 const char *buf,
830 size_t count)
831{
832 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
833 struct adt7470_data *data = dev_get_drvdata(dev);
834 struct i2c_client *client = data->client;
835 long temp;
836
837 if (kstrtol(buf, 10, &temp))
838 return -EINVAL;
839
840 temp = clamp_val(temp, 0, 255);
841
842 mutex_lock(&data->lock);
843 data->pwm_min[attr->index] = temp;
844 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
845 temp);
846 mutex_unlock(&data->lock);
847
848 return count;
849}
850
851static ssize_t show_pwm_tmax(struct device *dev,
852 struct device_attribute *devattr,
853 char *buf)
854{
855 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
856 struct adt7470_data *data = adt7470_update_device(dev);
857 /* the datasheet says that tmax = tmin + 20C */
858 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
859}
860
861static ssize_t show_pwm_tmin(struct device *dev,
862 struct device_attribute *devattr,
863 char *buf)
864{
865 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
866 struct adt7470_data *data = adt7470_update_device(dev);
867 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
868}
869
870static ssize_t set_pwm_tmin(struct device *dev,
871 struct device_attribute *devattr,
872 const char *buf,
873 size_t count)
874{
875 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
876 struct adt7470_data *data = dev_get_drvdata(dev);
877 struct i2c_client *client = data->client;
878 long temp;
879
880 if (kstrtol(buf, 10, &temp))
881 return -EINVAL;
882
883 temp = clamp_val(temp, -128000, 127000);
884 temp = DIV_ROUND_CLOSEST(temp, 1000);
885
886 mutex_lock(&data->lock);
887 data->pwm_tmin[attr->index] = temp;
888 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
889 temp);
890 mutex_unlock(&data->lock);
891
892 return count;
893}
894
895static ssize_t show_pwm_auto(struct device *dev,
896 struct device_attribute *devattr,
897 char *buf)
898{
899 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
900 struct adt7470_data *data = adt7470_update_device(dev);
901 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
902}
903
904static ssize_t set_pwm_auto(struct device *dev,
905 struct device_attribute *devattr,
906 const char *buf,
907 size_t count)
908{
909 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
910 struct adt7470_data *data = dev_get_drvdata(dev);
911 struct i2c_client *client = data->client;
912 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
913 int pwm_auto_reg_mask;
914 long temp;
915 u8 reg;
916
917 if (kstrtol(buf, 10, &temp))
918 return -EINVAL;
919
920 if (attr->index % 2)
921 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
922 else
923 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
924
925 if (temp != 2 && temp != 1)
926 return -EINVAL;
927 temp--;
928
929 mutex_lock(&data->lock);
930 data->pwm_automatic[attr->index] = temp;
931 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
932 if (temp)
933 reg |= pwm_auto_reg_mask;
934 else
935 reg &= ~pwm_auto_reg_mask;
936 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
937 mutex_unlock(&data->lock);
938
939 return count;
940}
941
942static ssize_t show_pwm_auto_temp(struct device *dev,
943 struct device_attribute *devattr,
944 char *buf)
945{
946 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
947 struct adt7470_data *data = adt7470_update_device(dev);
948 u8 ctrl = data->pwm_auto_temp[attr->index];
949
950 if (ctrl)
951 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
952 else
953 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
954}
955
956static int cvt_auto_temp(int input)
957{
958 if (input == ADT7470_PWM_ALL_TEMPS)
959 return 0;
960 if (input < 1 || !is_power_of_2(input))
961 return -EINVAL;
962 return ilog2(input) + 1;
963}
964
965static ssize_t set_pwm_auto_temp(struct device *dev,
966 struct device_attribute *devattr,
967 const char *buf,
968 size_t count)
969{
970 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
971 struct adt7470_data *data = dev_get_drvdata(dev);
972 struct i2c_client *client = data->client;
973 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
974 long temp;
975 u8 reg;
976
977 if (kstrtol(buf, 10, &temp))
978 return -EINVAL;
979
980 temp = cvt_auto_temp(temp);
981 if (temp < 0)
982 return temp;
983
984 mutex_lock(&data->lock);
985 data->pwm_automatic[attr->index] = temp;
986 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
987
988 if (!(attr->index % 2)) {
989 reg &= 0xF;
990 reg |= (temp << 4) & 0xF0;
991 } else {
992 reg &= 0xF0;
993 reg |= temp & 0xF;
994 }
995
996 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
997 mutex_unlock(&data->lock);
998
999 return count;
1000}
1001
1002static ssize_t show_alarm(struct device *dev,
1003 struct device_attribute *devattr,
1004 char *buf)
1005{
1006 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1007 struct adt7470_data *data = adt7470_update_device(dev);
1008
1009 if (data->alarm & attr->index)
1010 return sprintf(buf, "1\n");
1011 else
1012 return sprintf(buf, "0\n");
1013}
1014
1015static DEVICE_ATTR(alarm_mask, S_IWUSR | S_IRUGO, show_alarm_mask,
1016 set_alarm_mask);
1017static DEVICE_ATTR(num_temp_sensors, S_IWUSR | S_IRUGO, show_num_temp_sensors,
1018 set_num_temp_sensors);
1019static DEVICE_ATTR(auto_update_interval, S_IWUSR | S_IRUGO,
1020 show_auto_update_interval, set_auto_update_interval);
1021
1022static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
1023 set_temp_max, 0);
1024static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
1025 set_temp_max, 1);
1026static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
1027 set_temp_max, 2);
1028static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max,
1029 set_temp_max, 3);
1030static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max,
1031 set_temp_max, 4);
1032static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max,
1033 set_temp_max, 5);
1034static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max,
1035 set_temp_max, 6);
1036static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max,
1037 set_temp_max, 7);
1038static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max,
1039 set_temp_max, 8);
1040static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max,
1041 set_temp_max, 9);
1042
1043static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
1044 set_temp_min, 0);
1045static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
1046 set_temp_min, 1);
1047static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
1048 set_temp_min, 2);
1049static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min,
1050 set_temp_min, 3);
1051static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min,
1052 set_temp_min, 4);
1053static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min,
1054 set_temp_min, 5);
1055static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min,
1056 set_temp_min, 6);
1057static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min,
1058 set_temp_min, 7);
1059static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min,
1060 set_temp_min, 8);
1061static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min,
1062 set_temp_min, 9);
1063
1064static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
1065static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
1066static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
1067static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
1068static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
1069static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
1070static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
1071static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
1072static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8);
1073static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9);
1074
1075static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
1076 ADT7470_R1T_ALARM);
1077static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
1078 ADT7470_R2T_ALARM);
1079static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
1080 ADT7470_R3T_ALARM);
1081static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL,
1082 ADT7470_R4T_ALARM);
1083static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL,
1084 ADT7470_R5T_ALARM);
1085static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL,
1086 ADT7470_R6T_ALARM);
1087static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL,
1088 ADT7470_R7T_ALARM);
1089static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL,
1090 ALARM2(ADT7470_R8T_ALARM));
1091static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL,
1092 ALARM2(ADT7470_R9T_ALARM));
1093static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL,
1094 ALARM2(ADT7470_R10T_ALARM));
1095
1096static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
1097 set_fan_max, 0);
1098static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
1099 set_fan_max, 1);
1100static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
1101 set_fan_max, 2);
1102static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max,
1103 set_fan_max, 3);
1104
1105static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
1106 set_fan_min, 0);
1107static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
1108 set_fan_min, 1);
1109static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
1110 set_fan_min, 2);
1111static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
1112 set_fan_min, 3);
1113
1114static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
1115static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
1116static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
1117static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
1118
1119static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
1120 ALARM2(ADT7470_FAN1_ALARM));
1121static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
1122 ALARM2(ADT7470_FAN2_ALARM));
1123static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
1124 ALARM2(ADT7470_FAN3_ALARM));
1125static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
1126 ALARM2(ADT7470_FAN4_ALARM));
1127
1128static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO,
1129 show_force_pwm_max, set_force_pwm_max, 0);
1130
1131static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
1132static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
1133static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
1134static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
1135
1136static DEVICE_ATTR(pwm1_freq, S_IWUSR | S_IRUGO, show_pwm_freq, set_pwm_freq);
1137
1138static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
1139 show_pwm_min, set_pwm_min, 0);
1140static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
1141 show_pwm_min, set_pwm_min, 1);
1142static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
1143 show_pwm_min, set_pwm_min, 2);
1144static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO,
1145 show_pwm_min, set_pwm_min, 3);
1146
1147static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
1148 show_pwm_max, set_pwm_max, 0);
1149static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
1150 show_pwm_max, set_pwm_max, 1);
1151static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
1152 show_pwm_max, set_pwm_max, 2);
1153static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO,
1154 show_pwm_max, set_pwm_max, 3);
1155
1156static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
1157 show_pwm_tmin, set_pwm_tmin, 0);
1158static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO,
1159 show_pwm_tmin, set_pwm_tmin, 1);
1160static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO,
1161 show_pwm_tmin, set_pwm_tmin, 2);
1162static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO,
1163 show_pwm_tmin, set_pwm_tmin, 3);
1164
1165static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1166 NULL, 0);
1167static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1168 NULL, 1);
1169static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1170 NULL, 2);
1171static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1172 NULL, 3);
1173
1174static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1175 set_pwm_auto, 0);
1176static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1177 set_pwm_auto, 1);
1178static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1179 set_pwm_auto, 2);
1180static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1181 set_pwm_auto, 3);
1182
1183static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
1184 show_pwm_auto_temp, set_pwm_auto_temp, 0);
1185static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
1186 show_pwm_auto_temp, set_pwm_auto_temp, 1);
1187static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
1188 show_pwm_auto_temp, set_pwm_auto_temp, 2);
1189static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
1190 show_pwm_auto_temp, set_pwm_auto_temp, 3);
1191
1192static struct attribute *adt7470_attrs[] = {
1193 &dev_attr_alarm_mask.attr,
1194 &dev_attr_num_temp_sensors.attr,
1195 &dev_attr_auto_update_interval.attr,
1196 &sensor_dev_attr_temp1_max.dev_attr.attr,
1197 &sensor_dev_attr_temp2_max.dev_attr.attr,
1198 &sensor_dev_attr_temp3_max.dev_attr.attr,
1199 &sensor_dev_attr_temp4_max.dev_attr.attr,
1200 &sensor_dev_attr_temp5_max.dev_attr.attr,
1201 &sensor_dev_attr_temp6_max.dev_attr.attr,
1202 &sensor_dev_attr_temp7_max.dev_attr.attr,
1203 &sensor_dev_attr_temp8_max.dev_attr.attr,
1204 &sensor_dev_attr_temp9_max.dev_attr.attr,
1205 &sensor_dev_attr_temp10_max.dev_attr.attr,
1206 &sensor_dev_attr_temp1_min.dev_attr.attr,
1207 &sensor_dev_attr_temp2_min.dev_attr.attr,
1208 &sensor_dev_attr_temp3_min.dev_attr.attr,
1209 &sensor_dev_attr_temp4_min.dev_attr.attr,
1210 &sensor_dev_attr_temp5_min.dev_attr.attr,
1211 &sensor_dev_attr_temp6_min.dev_attr.attr,
1212 &sensor_dev_attr_temp7_min.dev_attr.attr,
1213 &sensor_dev_attr_temp8_min.dev_attr.attr,
1214 &sensor_dev_attr_temp9_min.dev_attr.attr,
1215 &sensor_dev_attr_temp10_min.dev_attr.attr,
1216 &sensor_dev_attr_temp1_input.dev_attr.attr,
1217 &sensor_dev_attr_temp2_input.dev_attr.attr,
1218 &sensor_dev_attr_temp3_input.dev_attr.attr,
1219 &sensor_dev_attr_temp4_input.dev_attr.attr,
1220 &sensor_dev_attr_temp5_input.dev_attr.attr,
1221 &sensor_dev_attr_temp6_input.dev_attr.attr,
1222 &sensor_dev_attr_temp7_input.dev_attr.attr,
1223 &sensor_dev_attr_temp8_input.dev_attr.attr,
1224 &sensor_dev_attr_temp9_input.dev_attr.attr,
1225 &sensor_dev_attr_temp10_input.dev_attr.attr,
1226 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1227 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1228 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1229 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
1230 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
1231 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
1232 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
1233 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
1234 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
1235 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
1236 &sensor_dev_attr_fan1_max.dev_attr.attr,
1237 &sensor_dev_attr_fan2_max.dev_attr.attr,
1238 &sensor_dev_attr_fan3_max.dev_attr.attr,
1239 &sensor_dev_attr_fan4_max.dev_attr.attr,
1240 &sensor_dev_attr_fan1_min.dev_attr.attr,
1241 &sensor_dev_attr_fan2_min.dev_attr.attr,
1242 &sensor_dev_attr_fan3_min.dev_attr.attr,
1243 &sensor_dev_attr_fan4_min.dev_attr.attr,
1244 &sensor_dev_attr_fan1_input.dev_attr.attr,
1245 &sensor_dev_attr_fan2_input.dev_attr.attr,
1246 &sensor_dev_attr_fan3_input.dev_attr.attr,
1247 &sensor_dev_attr_fan4_input.dev_attr.attr,
1248 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1249 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1250 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1251 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1252 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1253 &sensor_dev_attr_pwm1.dev_attr.attr,
1254 &dev_attr_pwm1_freq.attr,
1255 &sensor_dev_attr_pwm2.dev_attr.attr,
1256 &sensor_dev_attr_pwm3.dev_attr.attr,
1257 &sensor_dev_attr_pwm4.dev_attr.attr,
1258 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1259 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1260 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1261 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1262 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1263 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1264 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1265 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1266 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1267 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1268 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1269 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1270 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1271 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1272 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1273 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1274 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1275 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1276 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1277 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1278 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1279 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1280 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1281 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1282 NULL
1283};
1284
1285ATTRIBUTE_GROUPS(adt7470);
1286
1287/* Return 0 if detection is successful, -ENODEV otherwise */
1288static int adt7470_detect(struct i2c_client *client,
1289 struct i2c_board_info *info)
1290{
1291 struct i2c_adapter *adapter = client->adapter;
1292 int vendor, device, revision;
1293
1294 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1295 return -ENODEV;
1296
1297 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1298 if (vendor != ADT7470_VENDOR)
1299 return -ENODEV;
1300
1301 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1302 if (device != ADT7470_DEVICE)
1303 return -ENODEV;
1304
1305 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
1306 if (revision != ADT7470_REVISION)
1307 return -ENODEV;
1308
1309 strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1310
1311 return 0;
1312}
1313
1314static void adt7470_init_client(struct i2c_client *client)
1315{
1316 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
1317
1318 if (reg < 0) {
1319 dev_err(&client->dev, "cannot read configuration register\n");
1320 } else {
1321 /* start monitoring (and do a self-test) */
1322 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
1323 }
1324}
1325
1326static int adt7470_probe(struct i2c_client *client,
1327 const struct i2c_device_id *id)
1328{
1329 struct device *dev = &client->dev;
1330 struct adt7470_data *data;
1331 struct device *hwmon_dev;
1332
1333 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
1334 if (!data)
1335 return -ENOMEM;
1336
1337 data->num_temp_sensors = -1;
1338 data->auto_update_interval = AUTO_UPDATE_INTERVAL;
1339
1340 i2c_set_clientdata(client, data);
1341 data->client = client;
1342 mutex_init(&data->lock);
1343
1344 dev_info(&client->dev, "%s chip found\n", client->name);
1345
1346 /* Initialize the ADT7470 chip */
1347 adt7470_init_client(client);
1348
1349 /* Register sysfs hooks */
1350 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1351 data,
1352 adt7470_groups);
1353
1354 if (IS_ERR(hwmon_dev))
1355 return PTR_ERR(hwmon_dev);
1356
1357 data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
1358 dev_name(hwmon_dev));
1359 if (IS_ERR(data->auto_update)) {
1360 return PTR_ERR(data->auto_update);
1361 }
1362
1363 return 0;
1364}
1365
1366static int adt7470_remove(struct i2c_client *client)
1367{
1368 struct adt7470_data *data = i2c_get_clientdata(client);
1369
1370 kthread_stop(data->auto_update);
1371 return 0;
1372}
1373
1374static const struct i2c_device_id adt7470_id[] = {
1375 { "adt7470", 0 },
1376 { }
1377};
1378MODULE_DEVICE_TABLE(i2c, adt7470_id);
1379
1380static struct i2c_driver adt7470_driver = {
1381 .class = I2C_CLASS_HWMON,
1382 .driver = {
1383 .name = "adt7470",
1384 },
1385 .probe = adt7470_probe,
1386 .remove = adt7470_remove,
1387 .id_table = adt7470_id,
1388 .detect = adt7470_detect,
1389 .address_list = normal_i2c,
1390};
1391
1392module_i2c_driver(adt7470_driver);
1393
1394MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1395MODULE_DESCRIPTION("ADT7470 driver");
1396MODULE_LICENSE("GPL");