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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// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * A hwmon driver for the Analog Devices ADT7470
4 * Copyright (C) 2007 IBM
5 *
6 * Author: Darrick J. Wong <darrick.wong@oracle.com>
7 */
8
9#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
11#include <linux/module.h>
12#include <linux/jiffies.h>
13#include <linux/i2c.h>
14#include <linux/hwmon.h>
15#include <linux/hwmon-sysfs.h>
16#include <linux/err.h>
17#include <linux/mutex.h>
18#include <linux/delay.h>
19#include <linux/log2.h>
20#include <linux/kthread.h>
21#include <linux/slab.h>
22#include <linux/util_macros.h>
23
24/* Addresses to scan */
25static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
26
27/* ADT7470 registers */
28#define ADT7470_REG_BASE_ADDR 0x20
29#define ADT7470_REG_TEMP_BASE_ADDR 0x20
30#define ADT7470_REG_TEMP_MAX_ADDR 0x29
31#define ADT7470_REG_FAN_BASE_ADDR 0x2A
32#define ADT7470_REG_FAN_MAX_ADDR 0x31
33#define ADT7470_REG_PWM_BASE_ADDR 0x32
34#define ADT7470_REG_PWM_MAX_ADDR 0x35
35#define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
36#define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
37#define ADT7470_REG_CFG 0x40
38#define ADT7470_FSPD_MASK 0x04
39#define ADT7470_REG_ALARM1 0x41
40#define ADT7470_R1T_ALARM 0x01
41#define ADT7470_R2T_ALARM 0x02
42#define ADT7470_R3T_ALARM 0x04
43#define ADT7470_R4T_ALARM 0x08
44#define ADT7470_R5T_ALARM 0x10
45#define ADT7470_R6T_ALARM 0x20
46#define ADT7470_R7T_ALARM 0x40
47#define ADT7470_OOL_ALARM 0x80
48#define ADT7470_REG_ALARM2 0x42
49#define ADT7470_R8T_ALARM 0x01
50#define ADT7470_R9T_ALARM 0x02
51#define ADT7470_R10T_ALARM 0x04
52#define ADT7470_FAN1_ALARM 0x10
53#define ADT7470_FAN2_ALARM 0x20
54#define ADT7470_FAN3_ALARM 0x40
55#define ADT7470_FAN4_ALARM 0x80
56#define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
57#define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
58#define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
59#define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
60#define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
61#define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
62#define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
63#define ADT7470_REG_PWM12_CFG 0x68
64#define ADT7470_PWM2_AUTO_MASK 0x40
65#define ADT7470_PWM1_AUTO_MASK 0x80
66#define ADT7470_PWM_AUTO_MASK 0xC0
67#define ADT7470_REG_PWM34_CFG 0x69
68#define ADT7470_PWM3_AUTO_MASK 0x40
69#define ADT7470_PWM4_AUTO_MASK 0x80
70#define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
71#define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
72#define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
73#define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
74#define ADT7470_REG_CFG_2 0x74
75#define ADT7470_REG_ACOUSTICS12 0x75
76#define ADT7470_REG_ACOUSTICS34 0x76
77#define ADT7470_REG_DEVICE 0x3D
78#define ADT7470_REG_VENDOR 0x3E
79#define ADT7470_REG_REVISION 0x3F
80#define ADT7470_REG_ALARM1_MASK 0x72
81#define ADT7470_REG_ALARM2_MASK 0x73
82#define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
83#define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
84#define ADT7470_REG_MAX_ADDR 0x81
85
86#define ADT7470_TEMP_COUNT 10
87#define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
88#define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
89#define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
90 ((x) * 2) + 1)
91
92#define ADT7470_FAN_COUNT 4
93#define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
94#define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
95#define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
96
97#define ADT7470_PWM_COUNT 4
98#define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
99#define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
100#define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
101#define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
102#define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
103#define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
104 ((x) / 2))
105
106#define ALARM2(x) ((x) << 8)
107
108#define ADT7470_VENDOR 0x41
109#define ADT7470_DEVICE 0x70
110/* datasheet only mentions a revision 2 */
111#define ADT7470_REVISION 0x02
112
113/* "all temps" according to hwmon sysfs interface spec */
114#define ADT7470_PWM_ALL_TEMPS 0x3FF
115
116/* How often do we reread sensors values? (In jiffies) */
117#define SENSOR_REFRESH_INTERVAL (5 * HZ)
118
119/* How often do we reread sensor limit values? (In jiffies) */
120#define LIMIT_REFRESH_INTERVAL (60 * HZ)
121
122/* Wait at least 200ms per sensor for 10 sensors */
123#define TEMP_COLLECTION_TIME 2000
124
125/* auto update thing won't fire more than every 2s */
126#define AUTO_UPDATE_INTERVAL 2000
127
128/* datasheet says to divide this number by the fan reading to get fan rpm */
129#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
130#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
131#define FAN_PERIOD_INVALID 65535
132#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
133
134/* Config registers 1 and 2 include fields for selecting the PWM frequency */
135#define ADT7470_CFG_LF 0x40
136#define ADT7470_FREQ_MASK 0x70
137#define ADT7470_FREQ_SHIFT 4
138
139struct adt7470_data {
140 struct i2c_client *client;
141 struct mutex lock;
142 char sensors_valid;
143 char limits_valid;
144 unsigned long sensors_last_updated; /* In jiffies */
145 unsigned long limits_last_updated; /* In jiffies */
146
147 int num_temp_sensors; /* -1 = probe */
148 int temperatures_probed;
149
150 s8 temp[ADT7470_TEMP_COUNT];
151 s8 temp_min[ADT7470_TEMP_COUNT];
152 s8 temp_max[ADT7470_TEMP_COUNT];
153 u16 fan[ADT7470_FAN_COUNT];
154 u16 fan_min[ADT7470_FAN_COUNT];
155 u16 fan_max[ADT7470_FAN_COUNT];
156 u16 alarm;
157 u16 alarms_mask;
158 u8 force_pwm_max;
159 u8 pwm[ADT7470_PWM_COUNT];
160 u8 pwm_max[ADT7470_PWM_COUNT];
161 u8 pwm_automatic[ADT7470_PWM_COUNT];
162 u8 pwm_min[ADT7470_PWM_COUNT];
163 s8 pwm_tmin[ADT7470_PWM_COUNT];
164 u8 pwm_auto_temp[ADT7470_PWM_COUNT];
165
166 struct task_struct *auto_update;
167 unsigned int auto_update_interval;
168};
169
170/*
171 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says
172 * that the low byte must be read before the high byte.
173 */
174static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
175{
176 u16 foo;
177 foo = i2c_smbus_read_byte_data(client, reg);
178 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
179 return foo;
180}
181
182static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
183 u16 value)
184{
185 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
186 || i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
187}
188
189/* Probe for temperature sensors. Assumes lock is held */
190static int adt7470_read_temperatures(struct i2c_client *client,
191 struct adt7470_data *data)
192{
193 unsigned long res;
194 int i;
195 u8 cfg, pwm[4], pwm_cfg[2];
196
197 /* save pwm[1-4] config register */
198 pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
199 pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
200
201 /* set manual pwm to whatever it is set to now */
202 for (i = 0; i < ADT7470_FAN_COUNT; i++)
203 pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
204
205 /* put pwm in manual mode */
206 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
207 pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
208 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
209 pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
210
211 /* write pwm control to whatever it was */
212 for (i = 0; i < ADT7470_FAN_COUNT; i++)
213 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
214
215 /* start reading temperature sensors */
216 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
217 cfg |= 0x80;
218 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
219
220 /* Delay is 200ms * number of temp sensors. */
221 res = msleep_interruptible((data->num_temp_sensors >= 0 ?
222 data->num_temp_sensors * 200 :
223 TEMP_COLLECTION_TIME));
224
225 /* done reading temperature sensors */
226 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
227 cfg &= ~0x80;
228 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
229
230 /* restore pwm[1-4] config registers */
231 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
232 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
233
234 if (res) {
235 pr_err("ha ha, interrupted\n");
236 return -EAGAIN;
237 }
238
239 /* Only count fans if we have to */
240 if (data->num_temp_sensors >= 0)
241 return 0;
242
243 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
244 data->temp[i] = i2c_smbus_read_byte_data(client,
245 ADT7470_TEMP_REG(i));
246 if (data->temp[i])
247 data->num_temp_sensors = i + 1;
248 }
249 data->temperatures_probed = 1;
250 return 0;
251}
252
253static int adt7470_update_thread(void *p)
254{
255 struct i2c_client *client = p;
256 struct adt7470_data *data = i2c_get_clientdata(client);
257
258 while (!kthread_should_stop()) {
259 mutex_lock(&data->lock);
260 adt7470_read_temperatures(client, data);
261 mutex_unlock(&data->lock);
262
263 set_current_state(TASK_INTERRUPTIBLE);
264 if (kthread_should_stop())
265 break;
266
267 schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
268 }
269
270 return 0;
271}
272
273static struct adt7470_data *adt7470_update_device(struct device *dev)
274{
275 struct adt7470_data *data = dev_get_drvdata(dev);
276 struct i2c_client *client = data->client;
277 unsigned long local_jiffies = jiffies;
278 u8 cfg;
279 int i;
280 int need_sensors = 1;
281 int need_limits = 1;
282
283 /*
284 * Figure out if we need to update the shadow registers.
285 * Lockless means that we may occasionally report out of
286 * date data.
287 */
288 if (time_before(local_jiffies, data->sensors_last_updated +
289 SENSOR_REFRESH_INTERVAL) &&
290 data->sensors_valid)
291 need_sensors = 0;
292
293 if (time_before(local_jiffies, data->limits_last_updated +
294 LIMIT_REFRESH_INTERVAL) &&
295 data->limits_valid)
296 need_limits = 0;
297
298 if (!need_sensors && !need_limits)
299 return data;
300
301 mutex_lock(&data->lock);
302 if (!need_sensors)
303 goto no_sensor_update;
304
305 if (!data->temperatures_probed)
306 adt7470_read_temperatures(client, data);
307 else
308 for (i = 0; i < ADT7470_TEMP_COUNT; i++)
309 data->temp[i] = i2c_smbus_read_byte_data(client,
310 ADT7470_TEMP_REG(i));
311
312 for (i = 0; i < ADT7470_FAN_COUNT; i++)
313 data->fan[i] = adt7470_read_word_data(client,
314 ADT7470_REG_FAN(i));
315
316 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
317 int reg;
318 int reg_mask;
319
320 data->pwm[i] = i2c_smbus_read_byte_data(client,
321 ADT7470_REG_PWM(i));
322
323 if (i % 2)
324 reg_mask = ADT7470_PWM2_AUTO_MASK;
325 else
326 reg_mask = ADT7470_PWM1_AUTO_MASK;
327
328 reg = ADT7470_REG_PWM_CFG(i);
329 if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
330 data->pwm_automatic[i] = 1;
331 else
332 data->pwm_automatic[i] = 0;
333
334 reg = ADT7470_REG_PWM_AUTO_TEMP(i);
335 cfg = i2c_smbus_read_byte_data(client, reg);
336 if (!(i % 2))
337 data->pwm_auto_temp[i] = cfg >> 4;
338 else
339 data->pwm_auto_temp[i] = cfg & 0xF;
340 }
341
342 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
343 ADT7470_FSPD_MASK)
344 data->force_pwm_max = 1;
345 else
346 data->force_pwm_max = 0;
347
348 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
349 if (data->alarm & ADT7470_OOL_ALARM)
350 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
351 ADT7470_REG_ALARM2));
352 data->alarms_mask = adt7470_read_word_data(client,
353 ADT7470_REG_ALARM1_MASK);
354
355 data->sensors_last_updated = local_jiffies;
356 data->sensors_valid = 1;
357
358no_sensor_update:
359 if (!need_limits)
360 goto out;
361
362 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
363 data->temp_min[i] = i2c_smbus_read_byte_data(client,
364 ADT7470_TEMP_MIN_REG(i));
365 data->temp_max[i] = i2c_smbus_read_byte_data(client,
366 ADT7470_TEMP_MAX_REG(i));
367 }
368
369 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
370 data->fan_min[i] = adt7470_read_word_data(client,
371 ADT7470_REG_FAN_MIN(i));
372 data->fan_max[i] = adt7470_read_word_data(client,
373 ADT7470_REG_FAN_MAX(i));
374 }
375
376 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
377 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
378 ADT7470_REG_PWM_MAX(i));
379 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
380 ADT7470_REG_PWM_MIN(i));
381 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
382 ADT7470_REG_PWM_TMIN(i));
383 }
384
385 data->limits_last_updated = local_jiffies;
386 data->limits_valid = 1;
387
388out:
389 mutex_unlock(&data->lock);
390 return data;
391}
392
393static ssize_t auto_update_interval_show(struct device *dev,
394 struct device_attribute *devattr,
395 char *buf)
396{
397 struct adt7470_data *data = adt7470_update_device(dev);
398 return sprintf(buf, "%d\n", data->auto_update_interval);
399}
400
401static ssize_t auto_update_interval_store(struct device *dev,
402 struct device_attribute *devattr,
403 const char *buf, size_t count)
404{
405 struct adt7470_data *data = dev_get_drvdata(dev);
406 long temp;
407
408 if (kstrtol(buf, 10, &temp))
409 return -EINVAL;
410
411 temp = clamp_val(temp, 0, 60000);
412
413 mutex_lock(&data->lock);
414 data->auto_update_interval = temp;
415 mutex_unlock(&data->lock);
416
417 return count;
418}
419
420static ssize_t num_temp_sensors_show(struct device *dev,
421 struct device_attribute *devattr,
422 char *buf)
423{
424 struct adt7470_data *data = adt7470_update_device(dev);
425 return sprintf(buf, "%d\n", data->num_temp_sensors);
426}
427
428static ssize_t num_temp_sensors_store(struct device *dev,
429 struct device_attribute *devattr,
430 const char *buf, size_t count)
431{
432 struct adt7470_data *data = dev_get_drvdata(dev);
433 long temp;
434
435 if (kstrtol(buf, 10, &temp))
436 return -EINVAL;
437
438 temp = clamp_val(temp, -1, 10);
439
440 mutex_lock(&data->lock);
441 data->num_temp_sensors = temp;
442 if (temp < 0)
443 data->temperatures_probed = 0;
444 mutex_unlock(&data->lock);
445
446 return count;
447}
448
449static ssize_t temp_min_show(struct device *dev,
450 struct device_attribute *devattr, char *buf)
451{
452 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
453 struct adt7470_data *data = adt7470_update_device(dev);
454 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
455}
456
457static ssize_t temp_min_store(struct device *dev,
458 struct device_attribute *devattr,
459 const char *buf, size_t count)
460{
461 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
462 struct adt7470_data *data = dev_get_drvdata(dev);
463 struct i2c_client *client = data->client;
464 long temp;
465
466 if (kstrtol(buf, 10, &temp))
467 return -EINVAL;
468
469 temp = clamp_val(temp, -128000, 127000);
470 temp = DIV_ROUND_CLOSEST(temp, 1000);
471
472 mutex_lock(&data->lock);
473 data->temp_min[attr->index] = temp;
474 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
475 temp);
476 mutex_unlock(&data->lock);
477
478 return count;
479}
480
481static ssize_t temp_max_show(struct device *dev,
482 struct device_attribute *devattr, char *buf)
483{
484 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
485 struct adt7470_data *data = adt7470_update_device(dev);
486 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
487}
488
489static ssize_t temp_max_store(struct device *dev,
490 struct device_attribute *devattr,
491 const char *buf, size_t count)
492{
493 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
494 struct adt7470_data *data = dev_get_drvdata(dev);
495 struct i2c_client *client = data->client;
496 long temp;
497
498 if (kstrtol(buf, 10, &temp))
499 return -EINVAL;
500
501 temp = clamp_val(temp, -128000, 127000);
502 temp = DIV_ROUND_CLOSEST(temp, 1000);
503
504 mutex_lock(&data->lock);
505 data->temp_max[attr->index] = temp;
506 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
507 temp);
508 mutex_unlock(&data->lock);
509
510 return count;
511}
512
513static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
514 char *buf)
515{
516 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
517 struct adt7470_data *data = adt7470_update_device(dev);
518 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
519}
520
521static ssize_t alarm_mask_show(struct device *dev,
522 struct device_attribute *devattr,
523 char *buf)
524{
525 struct adt7470_data *data = adt7470_update_device(dev);
526
527 return sprintf(buf, "%x\n", data->alarms_mask);
528}
529
530static ssize_t alarm_mask_store(struct device *dev,
531 struct device_attribute *devattr,
532 const char *buf, size_t count)
533{
534 struct adt7470_data *data = dev_get_drvdata(dev);
535 long mask;
536
537 if (kstrtoul(buf, 0, &mask))
538 return -EINVAL;
539
540 if (mask & ~0xffff)
541 return -EINVAL;
542
543 mutex_lock(&data->lock);
544 data->alarms_mask = mask;
545 adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask);
546 mutex_unlock(&data->lock);
547
548 return count;
549}
550
551static ssize_t fan_max_show(struct device *dev,
552 struct device_attribute *devattr, char *buf)
553{
554 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
555 struct adt7470_data *data = adt7470_update_device(dev);
556
557 if (FAN_DATA_VALID(data->fan_max[attr->index]))
558 return sprintf(buf, "%d\n",
559 FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
560 else
561 return sprintf(buf, "0\n");
562}
563
564static ssize_t fan_max_store(struct device *dev,
565 struct device_attribute *devattr,
566 const char *buf, size_t count)
567{
568 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
569 struct adt7470_data *data = dev_get_drvdata(dev);
570 struct i2c_client *client = data->client;
571 long temp;
572
573 if (kstrtol(buf, 10, &temp) || !temp)
574 return -EINVAL;
575
576 temp = FAN_RPM_TO_PERIOD(temp);
577 temp = clamp_val(temp, 1, 65534);
578
579 mutex_lock(&data->lock);
580 data->fan_max[attr->index] = temp;
581 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
582 mutex_unlock(&data->lock);
583
584 return count;
585}
586
587static ssize_t fan_min_show(struct device *dev,
588 struct device_attribute *devattr, char *buf)
589{
590 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
591 struct adt7470_data *data = adt7470_update_device(dev);
592
593 if (FAN_DATA_VALID(data->fan_min[attr->index]))
594 return sprintf(buf, "%d\n",
595 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
596 else
597 return sprintf(buf, "0\n");
598}
599
600static ssize_t fan_min_store(struct device *dev,
601 struct device_attribute *devattr,
602 const char *buf, size_t count)
603{
604 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
605 struct adt7470_data *data = dev_get_drvdata(dev);
606 struct i2c_client *client = data->client;
607 long temp;
608
609 if (kstrtol(buf, 10, &temp) || !temp)
610 return -EINVAL;
611
612 temp = FAN_RPM_TO_PERIOD(temp);
613 temp = clamp_val(temp, 1, 65534);
614
615 mutex_lock(&data->lock);
616 data->fan_min[attr->index] = temp;
617 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
618 mutex_unlock(&data->lock);
619
620 return count;
621}
622
623static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
624 char *buf)
625{
626 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
627 struct adt7470_data *data = adt7470_update_device(dev);
628
629 if (FAN_DATA_VALID(data->fan[attr->index]))
630 return sprintf(buf, "%d\n",
631 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
632 else
633 return sprintf(buf, "0\n");
634}
635
636static ssize_t force_pwm_max_show(struct device *dev,
637 struct device_attribute *devattr, char *buf)
638{
639 struct adt7470_data *data = adt7470_update_device(dev);
640 return sprintf(buf, "%d\n", data->force_pwm_max);
641}
642
643static ssize_t force_pwm_max_store(struct device *dev,
644 struct device_attribute *devattr,
645 const char *buf, size_t count)
646{
647 struct adt7470_data *data = dev_get_drvdata(dev);
648 struct i2c_client *client = data->client;
649 long temp;
650 u8 reg;
651
652 if (kstrtol(buf, 10, &temp))
653 return -EINVAL;
654
655 mutex_lock(&data->lock);
656 data->force_pwm_max = temp;
657 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
658 if (temp)
659 reg |= ADT7470_FSPD_MASK;
660 else
661 reg &= ~ADT7470_FSPD_MASK;
662 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
663 mutex_unlock(&data->lock);
664
665 return count;
666}
667
668static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
669 char *buf)
670{
671 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
672 struct adt7470_data *data = adt7470_update_device(dev);
673 return sprintf(buf, "%d\n", data->pwm[attr->index]);
674}
675
676static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
677 const char *buf, size_t count)
678{
679 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
680 struct adt7470_data *data = dev_get_drvdata(dev);
681 struct i2c_client *client = data->client;
682 long temp;
683
684 if (kstrtol(buf, 10, &temp))
685 return -EINVAL;
686
687 temp = clamp_val(temp, 0, 255);
688
689 mutex_lock(&data->lock);
690 data->pwm[attr->index] = temp;
691 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
692 mutex_unlock(&data->lock);
693
694 return count;
695}
696
697/* These are the valid PWM frequencies to the nearest Hz */
698static const int adt7470_freq_map[] = {
699 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
700};
701
702static ssize_t pwm1_freq_show(struct device *dev,
703 struct device_attribute *devattr, char *buf)
704{
705 struct adt7470_data *data = adt7470_update_device(dev);
706 unsigned char cfg_reg_1;
707 unsigned char cfg_reg_2;
708 int index;
709
710 mutex_lock(&data->lock);
711 cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
712 cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
713 mutex_unlock(&data->lock);
714
715 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
716 if (!(cfg_reg_1 & ADT7470_CFG_LF))
717 index += 8;
718 if (index >= ARRAY_SIZE(adt7470_freq_map))
719 index = ARRAY_SIZE(adt7470_freq_map) - 1;
720
721 return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
722}
723
724static ssize_t pwm1_freq_store(struct device *dev,
725 struct device_attribute *devattr,
726 const char *buf, size_t count)
727{
728 struct adt7470_data *data = dev_get_drvdata(dev);
729 struct i2c_client *client = data->client;
730 long freq;
731 int index;
732 int low_freq = ADT7470_CFG_LF;
733 unsigned char val;
734
735 if (kstrtol(buf, 10, &freq))
736 return -EINVAL;
737
738 /* Round the user value given to the closest available frequency */
739 index = find_closest(freq, adt7470_freq_map,
740 ARRAY_SIZE(adt7470_freq_map));
741
742 if (index >= 8) {
743 index -= 8;
744 low_freq = 0;
745 }
746
747 mutex_lock(&data->lock);
748 /* Configuration Register 1 */
749 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
750 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
751 (val & ~ADT7470_CFG_LF) | low_freq);
752 /* Configuration Register 2 */
753 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
754 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
755 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
756 mutex_unlock(&data->lock);
757
758 return count;
759}
760
761static ssize_t pwm_max_show(struct device *dev,
762 struct device_attribute *devattr, char *buf)
763{
764 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
765 struct adt7470_data *data = adt7470_update_device(dev);
766 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
767}
768
769static ssize_t pwm_max_store(struct device *dev,
770 struct device_attribute *devattr,
771 const char *buf, size_t count)
772{
773 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
774 struct adt7470_data *data = dev_get_drvdata(dev);
775 struct i2c_client *client = data->client;
776 long temp;
777
778 if (kstrtol(buf, 10, &temp))
779 return -EINVAL;
780
781 temp = clamp_val(temp, 0, 255);
782
783 mutex_lock(&data->lock);
784 data->pwm_max[attr->index] = temp;
785 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
786 temp);
787 mutex_unlock(&data->lock);
788
789 return count;
790}
791
792static ssize_t pwm_min_show(struct device *dev,
793 struct device_attribute *devattr, char *buf)
794{
795 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
796 struct adt7470_data *data = adt7470_update_device(dev);
797 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
798}
799
800static ssize_t pwm_min_store(struct device *dev,
801 struct device_attribute *devattr,
802 const char *buf, size_t count)
803{
804 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
805 struct adt7470_data *data = dev_get_drvdata(dev);
806 struct i2c_client *client = data->client;
807 long temp;
808
809 if (kstrtol(buf, 10, &temp))
810 return -EINVAL;
811
812 temp = clamp_val(temp, 0, 255);
813
814 mutex_lock(&data->lock);
815 data->pwm_min[attr->index] = temp;
816 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
817 temp);
818 mutex_unlock(&data->lock);
819
820 return count;
821}
822
823static ssize_t pwm_tmax_show(struct device *dev,
824 struct device_attribute *devattr, char *buf)
825{
826 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
827 struct adt7470_data *data = adt7470_update_device(dev);
828 /* the datasheet says that tmax = tmin + 20C */
829 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
830}
831
832static ssize_t pwm_tmin_show(struct device *dev,
833 struct device_attribute *devattr, char *buf)
834{
835 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
836 struct adt7470_data *data = adt7470_update_device(dev);
837 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
838}
839
840static ssize_t pwm_tmin_store(struct device *dev,
841 struct device_attribute *devattr,
842 const char *buf, size_t count)
843{
844 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
845 struct adt7470_data *data = dev_get_drvdata(dev);
846 struct i2c_client *client = data->client;
847 long temp;
848
849 if (kstrtol(buf, 10, &temp))
850 return -EINVAL;
851
852 temp = clamp_val(temp, -128000, 127000);
853 temp = DIV_ROUND_CLOSEST(temp, 1000);
854
855 mutex_lock(&data->lock);
856 data->pwm_tmin[attr->index] = temp;
857 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
858 temp);
859 mutex_unlock(&data->lock);
860
861 return count;
862}
863
864static ssize_t pwm_auto_show(struct device *dev,
865 struct device_attribute *devattr, char *buf)
866{
867 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
868 struct adt7470_data *data = adt7470_update_device(dev);
869 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
870}
871
872static ssize_t pwm_auto_store(struct device *dev,
873 struct device_attribute *devattr,
874 const char *buf, size_t count)
875{
876 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
877 struct adt7470_data *data = dev_get_drvdata(dev);
878 struct i2c_client *client = data->client;
879 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
880 int pwm_auto_reg_mask;
881 long temp;
882 u8 reg;
883
884 if (kstrtol(buf, 10, &temp))
885 return -EINVAL;
886
887 if (attr->index % 2)
888 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
889 else
890 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
891
892 if (temp != 2 && temp != 1)
893 return -EINVAL;
894 temp--;
895
896 mutex_lock(&data->lock);
897 data->pwm_automatic[attr->index] = temp;
898 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
899 if (temp)
900 reg |= pwm_auto_reg_mask;
901 else
902 reg &= ~pwm_auto_reg_mask;
903 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
904 mutex_unlock(&data->lock);
905
906 return count;
907}
908
909static ssize_t pwm_auto_temp_show(struct device *dev,
910 struct device_attribute *devattr, char *buf)
911{
912 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
913 struct adt7470_data *data = adt7470_update_device(dev);
914 u8 ctrl = data->pwm_auto_temp[attr->index];
915
916 if (ctrl)
917 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
918 else
919 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
920}
921
922static int cvt_auto_temp(int input)
923{
924 if (input == ADT7470_PWM_ALL_TEMPS)
925 return 0;
926 if (input < 1 || !is_power_of_2(input))
927 return -EINVAL;
928 return ilog2(input) + 1;
929}
930
931static ssize_t pwm_auto_temp_store(struct device *dev,
932 struct device_attribute *devattr,
933 const char *buf, size_t count)
934{
935 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
936 struct adt7470_data *data = dev_get_drvdata(dev);
937 struct i2c_client *client = data->client;
938 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
939 long temp;
940 u8 reg;
941
942 if (kstrtol(buf, 10, &temp))
943 return -EINVAL;
944
945 temp = cvt_auto_temp(temp);
946 if (temp < 0)
947 return temp;
948
949 mutex_lock(&data->lock);
950 data->pwm_automatic[attr->index] = temp;
951 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
952
953 if (!(attr->index % 2)) {
954 reg &= 0xF;
955 reg |= (temp << 4) & 0xF0;
956 } else {
957 reg &= 0xF0;
958 reg |= temp & 0xF;
959 }
960
961 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
962 mutex_unlock(&data->lock);
963
964 return count;
965}
966
967static ssize_t alarm_show(struct device *dev,
968 struct device_attribute *devattr, char *buf)
969{
970 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
971 struct adt7470_data *data = adt7470_update_device(dev);
972
973 if (data->alarm & attr->index)
974 return sprintf(buf, "1\n");
975 else
976 return sprintf(buf, "0\n");
977}
978
979static DEVICE_ATTR_RW(alarm_mask);
980static DEVICE_ATTR_RW(num_temp_sensors);
981static DEVICE_ATTR_RW(auto_update_interval);
982
983static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
984static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
985static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
986static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
987static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
988static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
989static SENSOR_DEVICE_ATTR_RW(temp7_max, temp_max, 6);
990static SENSOR_DEVICE_ATTR_RW(temp8_max, temp_max, 7);
991static SENSOR_DEVICE_ATTR_RW(temp9_max, temp_max, 8);
992static SENSOR_DEVICE_ATTR_RW(temp10_max, temp_max, 9);
993
994static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
995static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
996static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
997static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3);
998static SENSOR_DEVICE_ATTR_RW(temp5_min, temp_min, 4);
999static SENSOR_DEVICE_ATTR_RW(temp6_min, temp_min, 5);
1000static SENSOR_DEVICE_ATTR_RW(temp7_min, temp_min, 6);
1001static SENSOR_DEVICE_ATTR_RW(temp8_min, temp_min, 7);
1002static SENSOR_DEVICE_ATTR_RW(temp9_min, temp_min, 8);
1003static SENSOR_DEVICE_ATTR_RW(temp10_min, temp_min, 9);
1004
1005static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
1006static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
1007static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
1008static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
1009static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
1010static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
1011static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6);
1012static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7);
1013static SENSOR_DEVICE_ATTR_RO(temp9_input, temp, 8);
1014static SENSOR_DEVICE_ATTR_RO(temp10_input, temp, 9);
1015
1016static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, ADT7470_R1T_ALARM);
1017static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, ADT7470_R2T_ALARM);
1018static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, ADT7470_R3T_ALARM);
1019static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, ADT7470_R4T_ALARM);
1020static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, ADT7470_R5T_ALARM);
1021static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, ADT7470_R6T_ALARM);
1022static SENSOR_DEVICE_ATTR_RO(temp7_alarm, alarm, ADT7470_R7T_ALARM);
1023static SENSOR_DEVICE_ATTR_RO(temp8_alarm, alarm, ALARM2(ADT7470_R8T_ALARM));
1024static SENSOR_DEVICE_ATTR_RO(temp9_alarm, alarm, ALARM2(ADT7470_R9T_ALARM));
1025static SENSOR_DEVICE_ATTR_RO(temp10_alarm, alarm, ALARM2(ADT7470_R10T_ALARM));
1026
1027static SENSOR_DEVICE_ATTR_RW(fan1_max, fan_max, 0);
1028static SENSOR_DEVICE_ATTR_RW(fan2_max, fan_max, 1);
1029static SENSOR_DEVICE_ATTR_RW(fan3_max, fan_max, 2);
1030static SENSOR_DEVICE_ATTR_RW(fan4_max, fan_max, 3);
1031
1032static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
1033static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
1034static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
1035static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
1036
1037static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
1038static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
1039static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
1040static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
1041
1042static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, ALARM2(ADT7470_FAN1_ALARM));
1043static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, ALARM2(ADT7470_FAN2_ALARM));
1044static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, ALARM2(ADT7470_FAN3_ALARM));
1045static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, ALARM2(ADT7470_FAN4_ALARM));
1046
1047static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0);
1048
1049static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
1050static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
1051static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
1052static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
1053
1054static DEVICE_ATTR_RW(pwm1_freq);
1055
1056static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0);
1057static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1);
1058static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2);
1059static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3);
1060
1061static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0);
1062static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1);
1063static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2);
1064static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3);
1065
1066static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_tmin, 0);
1067static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_temp, pwm_tmin, 1);
1068static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_temp, pwm_tmin, 2);
1069static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_temp, pwm_tmin, 3);
1070
1071static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point2_temp, pwm_tmax, 0);
1072static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1);
1073static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2);
1074static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3);
1075
1076static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_auto, 0);
1077static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_auto, 1);
1078static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_auto, 2);
1079static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_auto, 3);
1080
1081static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0);
1082static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1);
1083static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2);
1084static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3);
1085
1086static struct attribute *adt7470_attrs[] = {
1087 &dev_attr_alarm_mask.attr,
1088 &dev_attr_num_temp_sensors.attr,
1089 &dev_attr_auto_update_interval.attr,
1090 &sensor_dev_attr_temp1_max.dev_attr.attr,
1091 &sensor_dev_attr_temp2_max.dev_attr.attr,
1092 &sensor_dev_attr_temp3_max.dev_attr.attr,
1093 &sensor_dev_attr_temp4_max.dev_attr.attr,
1094 &sensor_dev_attr_temp5_max.dev_attr.attr,
1095 &sensor_dev_attr_temp6_max.dev_attr.attr,
1096 &sensor_dev_attr_temp7_max.dev_attr.attr,
1097 &sensor_dev_attr_temp8_max.dev_attr.attr,
1098 &sensor_dev_attr_temp9_max.dev_attr.attr,
1099 &sensor_dev_attr_temp10_max.dev_attr.attr,
1100 &sensor_dev_attr_temp1_min.dev_attr.attr,
1101 &sensor_dev_attr_temp2_min.dev_attr.attr,
1102 &sensor_dev_attr_temp3_min.dev_attr.attr,
1103 &sensor_dev_attr_temp4_min.dev_attr.attr,
1104 &sensor_dev_attr_temp5_min.dev_attr.attr,
1105 &sensor_dev_attr_temp6_min.dev_attr.attr,
1106 &sensor_dev_attr_temp7_min.dev_attr.attr,
1107 &sensor_dev_attr_temp8_min.dev_attr.attr,
1108 &sensor_dev_attr_temp9_min.dev_attr.attr,
1109 &sensor_dev_attr_temp10_min.dev_attr.attr,
1110 &sensor_dev_attr_temp1_input.dev_attr.attr,
1111 &sensor_dev_attr_temp2_input.dev_attr.attr,
1112 &sensor_dev_attr_temp3_input.dev_attr.attr,
1113 &sensor_dev_attr_temp4_input.dev_attr.attr,
1114 &sensor_dev_attr_temp5_input.dev_attr.attr,
1115 &sensor_dev_attr_temp6_input.dev_attr.attr,
1116 &sensor_dev_attr_temp7_input.dev_attr.attr,
1117 &sensor_dev_attr_temp8_input.dev_attr.attr,
1118 &sensor_dev_attr_temp9_input.dev_attr.attr,
1119 &sensor_dev_attr_temp10_input.dev_attr.attr,
1120 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1121 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1122 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1123 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
1124 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
1125 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
1126 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
1127 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
1128 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
1129 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
1130 &sensor_dev_attr_fan1_max.dev_attr.attr,
1131 &sensor_dev_attr_fan2_max.dev_attr.attr,
1132 &sensor_dev_attr_fan3_max.dev_attr.attr,
1133 &sensor_dev_attr_fan4_max.dev_attr.attr,
1134 &sensor_dev_attr_fan1_min.dev_attr.attr,
1135 &sensor_dev_attr_fan2_min.dev_attr.attr,
1136 &sensor_dev_attr_fan3_min.dev_attr.attr,
1137 &sensor_dev_attr_fan4_min.dev_attr.attr,
1138 &sensor_dev_attr_fan1_input.dev_attr.attr,
1139 &sensor_dev_attr_fan2_input.dev_attr.attr,
1140 &sensor_dev_attr_fan3_input.dev_attr.attr,
1141 &sensor_dev_attr_fan4_input.dev_attr.attr,
1142 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1143 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1144 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1145 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1146 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1147 &sensor_dev_attr_pwm1.dev_attr.attr,
1148 &dev_attr_pwm1_freq.attr,
1149 &sensor_dev_attr_pwm2.dev_attr.attr,
1150 &sensor_dev_attr_pwm3.dev_attr.attr,
1151 &sensor_dev_attr_pwm4.dev_attr.attr,
1152 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1153 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1154 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1155 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1156 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1157 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1158 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1159 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1160 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1161 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1162 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1163 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1164 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1165 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1166 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1167 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1168 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1169 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1170 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1171 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1172 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1173 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1174 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1175 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1176 NULL
1177};
1178
1179ATTRIBUTE_GROUPS(adt7470);
1180
1181/* Return 0 if detection is successful, -ENODEV otherwise */
1182static int adt7470_detect(struct i2c_client *client,
1183 struct i2c_board_info *info)
1184{
1185 struct i2c_adapter *adapter = client->adapter;
1186 int vendor, device, revision;
1187
1188 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1189 return -ENODEV;
1190
1191 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1192 if (vendor != ADT7470_VENDOR)
1193 return -ENODEV;
1194
1195 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1196 if (device != ADT7470_DEVICE)
1197 return -ENODEV;
1198
1199 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
1200 if (revision != ADT7470_REVISION)
1201 return -ENODEV;
1202
1203 strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1204
1205 return 0;
1206}
1207
1208static void adt7470_init_client(struct i2c_client *client)
1209{
1210 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
1211
1212 if (reg < 0) {
1213 dev_err(&client->dev, "cannot read configuration register\n");
1214 } else {
1215 /* start monitoring (and do a self-test) */
1216 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
1217 }
1218}
1219
1220static int adt7470_probe(struct i2c_client *client,
1221 const struct i2c_device_id *id)
1222{
1223 struct device *dev = &client->dev;
1224 struct adt7470_data *data;
1225 struct device *hwmon_dev;
1226
1227 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
1228 if (!data)
1229 return -ENOMEM;
1230
1231 data->num_temp_sensors = -1;
1232 data->auto_update_interval = AUTO_UPDATE_INTERVAL;
1233
1234 i2c_set_clientdata(client, data);
1235 data->client = client;
1236 mutex_init(&data->lock);
1237
1238 dev_info(&client->dev, "%s chip found\n", client->name);
1239
1240 /* Initialize the ADT7470 chip */
1241 adt7470_init_client(client);
1242
1243 /* Register sysfs hooks */
1244 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1245 data,
1246 adt7470_groups);
1247
1248 if (IS_ERR(hwmon_dev))
1249 return PTR_ERR(hwmon_dev);
1250
1251 data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
1252 dev_name(hwmon_dev));
1253 if (IS_ERR(data->auto_update)) {
1254 return PTR_ERR(data->auto_update);
1255 }
1256
1257 return 0;
1258}
1259
1260static int adt7470_remove(struct i2c_client *client)
1261{
1262 struct adt7470_data *data = i2c_get_clientdata(client);
1263
1264 kthread_stop(data->auto_update);
1265 return 0;
1266}
1267
1268static const struct i2c_device_id adt7470_id[] = {
1269 { "adt7470", 0 },
1270 { }
1271};
1272MODULE_DEVICE_TABLE(i2c, adt7470_id);
1273
1274static struct i2c_driver adt7470_driver = {
1275 .class = I2C_CLASS_HWMON,
1276 .driver = {
1277 .name = "adt7470",
1278 },
1279 .probe = adt7470_probe,
1280 .remove = adt7470_remove,
1281 .id_table = adt7470_id,
1282 .detect = adt7470_detect,
1283 .address_list = normal_i2c,
1284};
1285
1286module_i2c_driver(adt7470_driver);
1287
1288MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1289MODULE_DESCRIPTION("ADT7470 driver");
1290MODULE_LICENSE("GPL");