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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/regmap.h>
22#include <linux/sched.h>
23#include <linux/slab.h>
24#include <linux/util_macros.h>
25
26/* Addresses to scan */
27static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
28
29/* ADT7470 registers */
30#define ADT7470_REG_BASE_ADDR 0x20
31#define ADT7470_REG_TEMP_BASE_ADDR 0x20
32#define ADT7470_REG_TEMP_MAX_ADDR 0x29
33#define ADT7470_REG_FAN_BASE_ADDR 0x2A
34#define ADT7470_REG_FAN_MAX_ADDR 0x31
35#define ADT7470_REG_PWM_BASE_ADDR 0x32
36#define ADT7470_REG_PWM_MAX_ADDR 0x35
37#define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
38#define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
39#define ADT7470_REG_CFG 0x40
40#define ADT7470_STRT_MASK 0x01
41#define ADT7470_TEST_MASK 0x02
42#define ADT7470_FSPD_MASK 0x04
43#define ADT7470_T05_STB_MASK 0x80
44#define ADT7470_REG_ALARM1 0x41
45#define ADT7470_R1T_ALARM 0x01
46#define ADT7470_R2T_ALARM 0x02
47#define ADT7470_R3T_ALARM 0x04
48#define ADT7470_R4T_ALARM 0x08
49#define ADT7470_R5T_ALARM 0x10
50#define ADT7470_R6T_ALARM 0x20
51#define ADT7470_R7T_ALARM 0x40
52#define ADT7470_OOL_ALARM 0x80
53#define ADT7470_REG_ALARM2 0x42
54#define ADT7470_R8T_ALARM 0x01
55#define ADT7470_R9T_ALARM 0x02
56#define ADT7470_R10T_ALARM 0x04
57#define ADT7470_FAN1_ALARM 0x10
58#define ADT7470_FAN2_ALARM 0x20
59#define ADT7470_FAN3_ALARM 0x40
60#define ADT7470_FAN4_ALARM 0x80
61#define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
62#define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
63#define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
64#define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
65#define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
66#define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
67#define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
68#define ADT7470_REG_PWM12_CFG 0x68
69#define ADT7470_PWM2_AUTO_MASK 0x40
70#define ADT7470_PWM1_AUTO_MASK 0x80
71#define ADT7470_PWM_AUTO_MASK 0xC0
72#define ADT7470_REG_PWM34_CFG 0x69
73#define ADT7470_PWM3_AUTO_MASK 0x40
74#define ADT7470_PWM4_AUTO_MASK 0x80
75#define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
76#define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
77#define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
78#define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
79#define ADT7470_REG_CFG_2 0x74
80#define ADT7470_REG_ACOUSTICS12 0x75
81#define ADT7470_REG_ACOUSTICS34 0x76
82#define ADT7470_REG_DEVICE 0x3D
83#define ADT7470_REG_VENDOR 0x3E
84#define ADT7470_REG_REVISION 0x3F
85#define ADT7470_REG_ALARM1_MASK 0x72
86#define ADT7470_REG_ALARM2_MASK 0x73
87#define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
88#define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
89#define ADT7470_REG_MAX_ADDR 0x81
90
91#define ADT7470_TEMP_COUNT 10
92#define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
93#define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
94#define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
95 ((x) * 2) + 1)
96
97#define ADT7470_FAN_COUNT 4
98#define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
99#define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
100#define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
101
102#define ADT7470_PWM_COUNT 4
103#define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
104#define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
105#define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
106#define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
107#define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
108#define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
109 ((x) / 2))
110
111#define ALARM2(x) ((x) << 8)
112
113#define ADT7470_VENDOR 0x41
114#define ADT7470_DEVICE 0x70
115/* datasheet only mentions a revision 2 */
116#define ADT7470_REVISION 0x02
117
118/* "all temps" according to hwmon sysfs interface spec */
119#define ADT7470_PWM_ALL_TEMPS 0x3FF
120
121/* How often do we reread sensors values? (In jiffies) */
122#define SENSOR_REFRESH_INTERVAL (5 * HZ)
123
124/* How often do we reread sensor limit values? (In jiffies) */
125#define LIMIT_REFRESH_INTERVAL (60 * HZ)
126
127/* Wait at least 200ms per sensor for 10 sensors */
128#define TEMP_COLLECTION_TIME 2000
129
130/* auto update thing won't fire more than every 2s */
131#define AUTO_UPDATE_INTERVAL 2000
132
133/* datasheet says to divide this number by the fan reading to get fan rpm */
134#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
135#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
136#define FAN_PERIOD_INVALID 65535
137#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
138
139/* Config registers 1 and 2 include fields for selecting the PWM frequency */
140#define ADT7470_CFG_LF 0x40
141#define ADT7470_FREQ_MASK 0x70
142#define ADT7470_FREQ_SHIFT 4
143
144struct adt7470_data {
145 struct regmap *regmap;
146 struct mutex lock;
147 char sensors_valid;
148 char limits_valid;
149 unsigned long sensors_last_updated; /* In jiffies */
150 unsigned long limits_last_updated; /* In jiffies */
151
152 int num_temp_sensors; /* -1 = probe */
153 int temperatures_probed;
154
155 s8 temp[ADT7470_TEMP_COUNT];
156 s8 temp_min[ADT7470_TEMP_COUNT];
157 s8 temp_max[ADT7470_TEMP_COUNT];
158 u16 fan[ADT7470_FAN_COUNT];
159 u16 fan_min[ADT7470_FAN_COUNT];
160 u16 fan_max[ADT7470_FAN_COUNT];
161 u16 alarm;
162 u16 alarms_mask;
163 u8 force_pwm_max;
164 u8 pwm[ADT7470_PWM_COUNT];
165 u8 pwm_max[ADT7470_PWM_COUNT];
166 u8 pwm_automatic[ADT7470_PWM_COUNT];
167 u8 pwm_min[ADT7470_PWM_COUNT];
168 s8 pwm_tmin[ADT7470_PWM_COUNT];
169 u8 pwm_auto_temp[ADT7470_PWM_COUNT];
170
171 struct task_struct *auto_update;
172 unsigned int auto_update_interval;
173};
174
175/*
176 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says
177 * that the low byte must be read before the high byte.
178 */
179static inline int adt7470_read_word_data(struct adt7470_data *data, unsigned int reg,
180 unsigned int *val)
181{
182 u8 regval[2];
183 int err;
184
185 err = regmap_bulk_read(data->regmap, reg, ®val, 2);
186 if (err < 0)
187 return err;
188
189 *val = regval[0] | (regval[1] << 8);
190
191 return 0;
192}
193
194static inline int adt7470_write_word_data(struct adt7470_data *data, unsigned int reg,
195 unsigned int val)
196{
197 u8 regval[2];
198
199 regval[0] = val & 0xFF;
200 regval[1] = val >> 8;
201
202 return regmap_bulk_write(data->regmap, reg, ®val, 2);
203}
204
205/* Probe for temperature sensors. Assumes lock is held */
206static int adt7470_read_temperatures(struct adt7470_data *data)
207{
208 unsigned long res;
209 unsigned int pwm_cfg[2];
210 int err;
211 int i;
212 u8 pwm[ADT7470_FAN_COUNT];
213
214 /* save pwm[1-4] config register */
215 err = regmap_read(data->regmap, ADT7470_REG_PWM_CFG(0), &pwm_cfg[0]);
216 if (err < 0)
217 return err;
218 err = regmap_read(data->regmap, ADT7470_REG_PWM_CFG(2), &pwm_cfg[1]);
219 if (err < 0)
220 return err;
221
222 /* set manual pwm to whatever it is set to now */
223 err = regmap_bulk_read(data->regmap, ADT7470_REG_PWM(0), &pwm[0],
224 ADT7470_PWM_COUNT);
225 if (err < 0)
226 return err;
227
228 /* put pwm in manual mode */
229 err = regmap_update_bits(data->regmap, ADT7470_REG_PWM_CFG(0),
230 ADT7470_PWM_AUTO_MASK, 0);
231 if (err < 0)
232 return err;
233 err = regmap_update_bits(data->regmap, ADT7470_REG_PWM_CFG(2),
234 ADT7470_PWM_AUTO_MASK, 0);
235 if (err < 0)
236 return err;
237
238 /* write pwm control to whatever it was */
239 err = regmap_bulk_write(data->regmap, ADT7470_REG_PWM(0), &pwm[0],
240 ADT7470_PWM_COUNT);
241 if (err < 0)
242 return err;
243
244 /* start reading temperature sensors */
245 err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
246 ADT7470_T05_STB_MASK, ADT7470_T05_STB_MASK);
247 if (err < 0)
248 return err;
249
250 /* Delay is 200ms * number of temp sensors. */
251 res = msleep_interruptible((data->num_temp_sensors >= 0 ?
252 data->num_temp_sensors * 200 :
253 TEMP_COLLECTION_TIME));
254
255 /* done reading temperature sensors */
256 err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
257 ADT7470_T05_STB_MASK, 0);
258 if (err < 0)
259 return err;
260
261 /* restore pwm[1-4] config registers */
262 err = regmap_write(data->regmap, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
263 if (err < 0)
264 return err;
265 err = regmap_write(data->regmap, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
266 if (err < 0)
267 return err;
268
269 if (res)
270 return -EAGAIN;
271
272 /* Only count fans if we have to */
273 if (data->num_temp_sensors >= 0)
274 return 0;
275
276 err = regmap_bulk_read(data->regmap, ADT7470_TEMP_REG(0), &data->temp[0],
277 ADT7470_TEMP_COUNT);
278 if (err < 0)
279 return err;
280 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
281 if (data->temp[i])
282 data->num_temp_sensors = i + 1;
283 }
284 data->temperatures_probed = 1;
285 return 0;
286}
287
288static int adt7470_update_thread(void *p)
289{
290 struct i2c_client *client = p;
291 struct adt7470_data *data = i2c_get_clientdata(client);
292
293 while (!kthread_should_stop()) {
294 mutex_lock(&data->lock);
295 adt7470_read_temperatures(data);
296 mutex_unlock(&data->lock);
297
298 if (kthread_should_stop())
299 break;
300
301 schedule_timeout_interruptible(msecs_to_jiffies(data->auto_update_interval));
302 }
303
304 return 0;
305}
306
307static int adt7470_update_sensors(struct adt7470_data *data)
308{
309 unsigned int val;
310 int err;
311 int i;
312
313 if (!data->temperatures_probed)
314 err = adt7470_read_temperatures(data);
315 else
316 err = regmap_bulk_read(data->regmap, ADT7470_TEMP_REG(0), &data->temp[0],
317 ADT7470_TEMP_COUNT);
318 if (err < 0)
319 return err;
320
321 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
322 err = adt7470_read_word_data(data, ADT7470_REG_FAN(i), &val);
323 if (err < 0)
324 return err;
325 data->fan[i] = val;
326 }
327
328 err = regmap_bulk_read(data->regmap, ADT7470_REG_PWM(0), &data->pwm[0], ADT7470_PWM_COUNT);
329 if (err < 0)
330 return err;
331
332 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
333 unsigned int mask;
334
335 if (i % 2)
336 mask = ADT7470_PWM2_AUTO_MASK;
337 else
338 mask = ADT7470_PWM1_AUTO_MASK;
339
340 err = regmap_read(data->regmap, ADT7470_REG_PWM_CFG(i), &val);
341 if (err < 0)
342 return err;
343 data->pwm_automatic[i] = !!(val & mask);
344
345 err = regmap_read(data->regmap, ADT7470_REG_PWM_AUTO_TEMP(i), &val);
346 if (err < 0)
347 return err;
348 if (!(i % 2))
349 data->pwm_auto_temp[i] = val >> 4;
350 else
351 data->pwm_auto_temp[i] = val & 0xF;
352 }
353
354 err = regmap_read(data->regmap, ADT7470_REG_CFG, &val);
355 if (err < 0)
356 return err;
357 data->force_pwm_max = !!(val & ADT7470_FSPD_MASK);
358
359 err = regmap_read(data->regmap, ADT7470_REG_ALARM1, &val);
360 if (err < 0)
361 return err;
362 data->alarm = val;
363 if (data->alarm & ADT7470_OOL_ALARM) {
364 err = regmap_read(data->regmap, ADT7470_REG_ALARM2, &val);
365 if (err < 0)
366 return err;
367 data->alarm |= ALARM2(val);
368 }
369
370 err = adt7470_read_word_data(data, ADT7470_REG_ALARM1_MASK, &val);
371 if (err < 0)
372 return err;
373 data->alarms_mask = val;
374
375 return 0;
376}
377
378static int adt7470_update_limits(struct adt7470_data *data)
379{
380 unsigned int val;
381 int err;
382 int i;
383
384 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
385 err = regmap_read(data->regmap, ADT7470_TEMP_MIN_REG(i), &val);
386 if (err < 0)
387 return err;
388 data->temp_min[i] = (s8)val;
389 err = regmap_read(data->regmap, ADT7470_TEMP_MAX_REG(i), &val);
390 if (err < 0)
391 return err;
392 data->temp_max[i] = (s8)val;
393 }
394
395 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
396 err = adt7470_read_word_data(data, ADT7470_REG_FAN_MIN(i), &val);
397 if (err < 0)
398 return err;
399 data->fan_min[i] = val;
400 err = adt7470_read_word_data(data, ADT7470_REG_FAN_MAX(i), &val);
401 if (err < 0)
402 return err;
403 data->fan_max[i] = val;
404 }
405
406 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
407 err = regmap_read(data->regmap, ADT7470_REG_PWM_MAX(i), &val);
408 if (err < 0)
409 return err;
410 data->pwm_max[i] = val;
411 err = regmap_read(data->regmap, ADT7470_REG_PWM_MIN(i), &val);
412 if (err < 0)
413 return err;
414 data->pwm_min[i] = val;
415 err = regmap_read(data->regmap, ADT7470_REG_PWM_TMIN(i), &val);
416 if (err < 0)
417 return err;
418 data->pwm_tmin[i] = (s8)val;
419 }
420
421 return 0;
422}
423
424static struct adt7470_data *adt7470_update_device(struct device *dev)
425{
426 struct adt7470_data *data = dev_get_drvdata(dev);
427 unsigned long local_jiffies = jiffies;
428 int need_sensors = 1;
429 int need_limits = 1;
430 int err;
431
432 /*
433 * Figure out if we need to update the shadow registers.
434 * Lockless means that we may occasionally report out of
435 * date data.
436 */
437 if (time_before(local_jiffies, data->sensors_last_updated +
438 SENSOR_REFRESH_INTERVAL) &&
439 data->sensors_valid)
440 need_sensors = 0;
441
442 if (time_before(local_jiffies, data->limits_last_updated +
443 LIMIT_REFRESH_INTERVAL) &&
444 data->limits_valid)
445 need_limits = 0;
446
447 if (!need_sensors && !need_limits)
448 return data;
449
450 mutex_lock(&data->lock);
451 if (need_sensors) {
452 err = adt7470_update_sensors(data);
453 if (err < 0)
454 goto out;
455 data->sensors_last_updated = local_jiffies;
456 data->sensors_valid = 1;
457 }
458
459 if (need_limits) {
460 err = adt7470_update_limits(data);
461 if (err < 0)
462 goto out;
463 data->limits_last_updated = local_jiffies;
464 data->limits_valid = 1;
465 }
466out:
467 mutex_unlock(&data->lock);
468
469 return err < 0 ? ERR_PTR(err) : data;
470}
471
472static ssize_t auto_update_interval_show(struct device *dev,
473 struct device_attribute *devattr,
474 char *buf)
475{
476 struct adt7470_data *data = adt7470_update_device(dev);
477
478 if (IS_ERR(data))
479 return PTR_ERR(data);
480
481 return sprintf(buf, "%d\n", data->auto_update_interval);
482}
483
484static ssize_t auto_update_interval_store(struct device *dev,
485 struct device_attribute *devattr,
486 const char *buf, size_t count)
487{
488 struct adt7470_data *data = dev_get_drvdata(dev);
489 long temp;
490
491 if (kstrtol(buf, 10, &temp))
492 return -EINVAL;
493
494 temp = clamp_val(temp, 0, 60000);
495
496 mutex_lock(&data->lock);
497 data->auto_update_interval = temp;
498 mutex_unlock(&data->lock);
499
500 return count;
501}
502
503static ssize_t num_temp_sensors_show(struct device *dev,
504 struct device_attribute *devattr,
505 char *buf)
506{
507 struct adt7470_data *data = adt7470_update_device(dev);
508
509 if (IS_ERR(data))
510 return PTR_ERR(data);
511
512 return sprintf(buf, "%d\n", data->num_temp_sensors);
513}
514
515static ssize_t num_temp_sensors_store(struct device *dev,
516 struct device_attribute *devattr,
517 const char *buf, size_t count)
518{
519 struct adt7470_data *data = dev_get_drvdata(dev);
520 long temp;
521
522 if (kstrtol(buf, 10, &temp))
523 return -EINVAL;
524
525 temp = clamp_val(temp, -1, 10);
526
527 mutex_lock(&data->lock);
528 data->num_temp_sensors = temp;
529 if (temp < 0)
530 data->temperatures_probed = 0;
531 mutex_unlock(&data->lock);
532
533 return count;
534}
535
536static int adt7470_temp_read(struct device *dev, u32 attr, int channel, long *val)
537{
538 struct adt7470_data *data = adt7470_update_device(dev);
539
540 if (IS_ERR(data))
541 return PTR_ERR(data);
542
543 switch (attr) {
544 case hwmon_temp_input:
545 *val = 1000 * data->temp[channel];
546 break;
547 case hwmon_temp_min:
548 *val = 1000 * data->temp_min[channel];
549 break;
550 case hwmon_temp_max:
551 *val = 1000 * data->temp_max[channel];
552 break;
553 case hwmon_temp_alarm:
554 *val = !!(data->alarm & channel);
555 break;
556 default:
557 return -EOPNOTSUPP;
558 }
559
560 return 0;
561}
562
563static int adt7470_temp_write(struct device *dev, u32 attr, int channel, long val)
564{
565 struct adt7470_data *data = dev_get_drvdata(dev);
566 int err;
567
568 val = clamp_val(val, -128000, 127000);
569 val = DIV_ROUND_CLOSEST(val, 1000);
570
571 switch (attr) {
572 case hwmon_temp_min:
573 mutex_lock(&data->lock);
574 data->temp_min[channel] = val;
575 err = regmap_write(data->regmap, ADT7470_TEMP_MIN_REG(channel), val);
576 mutex_unlock(&data->lock);
577 break;
578 case hwmon_temp_max:
579 mutex_lock(&data->lock);
580 data->temp_max[channel] = val;
581 err = regmap_write(data->regmap, ADT7470_TEMP_MAX_REG(channel), val);
582 mutex_unlock(&data->lock);
583 break;
584 default:
585 return -EOPNOTSUPP;
586 }
587
588 return err;
589}
590
591static ssize_t alarm_mask_show(struct device *dev,
592 struct device_attribute *devattr, char *buf)
593{
594 struct adt7470_data *data = adt7470_update_device(dev);
595
596 if (IS_ERR(data))
597 return PTR_ERR(data);
598
599 return sprintf(buf, "%x\n", data->alarms_mask);
600}
601
602static ssize_t alarm_mask_store(struct device *dev,
603 struct device_attribute *devattr,
604 const char *buf, size_t count)
605{
606 struct adt7470_data *data = dev_get_drvdata(dev);
607 long mask;
608 int err;
609
610 if (kstrtoul(buf, 0, &mask))
611 return -EINVAL;
612
613 if (mask & ~0xffff)
614 return -EINVAL;
615
616 mutex_lock(&data->lock);
617 data->alarms_mask = mask;
618 err = adt7470_write_word_data(data, ADT7470_REG_ALARM1_MASK, mask);
619 mutex_unlock(&data->lock);
620
621 return err < 0 ? err : count;
622}
623
624static int adt7470_fan_read(struct device *dev, u32 attr, int channel, long *val)
625{
626 struct adt7470_data *data = adt7470_update_device(dev);
627
628 if (IS_ERR(data))
629 return PTR_ERR(data);
630
631 switch (attr) {
632 case hwmon_fan_input:
633 if (FAN_DATA_VALID(data->fan[channel]))
634 *val = FAN_PERIOD_TO_RPM(data->fan[channel]);
635 else
636 *val = 0;
637 break;
638 case hwmon_fan_min:
639 if (FAN_DATA_VALID(data->fan_min[channel]))
640 *val = FAN_PERIOD_TO_RPM(data->fan_min[channel]);
641 else
642 *val = 0;
643 break;
644 case hwmon_fan_max:
645 if (FAN_DATA_VALID(data->fan_max[channel]))
646 *val = FAN_PERIOD_TO_RPM(data->fan_max[channel]);
647 else
648 *val = 0;
649 break;
650 case hwmon_fan_alarm:
651 *val = !!(data->alarm & (1 << (12 + channel)));
652 break;
653 default:
654 return -EOPNOTSUPP;
655 }
656
657 return 0;
658}
659
660static int adt7470_fan_write(struct device *dev, u32 attr, int channel, long val)
661{
662 struct adt7470_data *data = dev_get_drvdata(dev);
663 int err;
664
665 if (val <= 0)
666 return -EINVAL;
667
668 val = FAN_RPM_TO_PERIOD(val);
669 val = clamp_val(val, 1, 65534);
670
671 switch (attr) {
672 case hwmon_fan_min:
673 mutex_lock(&data->lock);
674 data->fan_min[channel] = val;
675 err = adt7470_write_word_data(data, ADT7470_REG_FAN_MIN(channel), val);
676 mutex_unlock(&data->lock);
677 break;
678 case hwmon_fan_max:
679 mutex_lock(&data->lock);
680 data->fan_max[channel] = val;
681 err = adt7470_write_word_data(data, ADT7470_REG_FAN_MAX(channel), val);
682 mutex_unlock(&data->lock);
683 break;
684 default:
685 return -EOPNOTSUPP;
686 }
687
688 return err;
689}
690
691static ssize_t force_pwm_max_show(struct device *dev,
692 struct device_attribute *devattr, char *buf)
693{
694 struct adt7470_data *data = adt7470_update_device(dev);
695
696 if (IS_ERR(data))
697 return PTR_ERR(data);
698
699 return sprintf(buf, "%d\n", data->force_pwm_max);
700}
701
702static ssize_t force_pwm_max_store(struct device *dev,
703 struct device_attribute *devattr,
704 const char *buf, size_t count)
705{
706 struct adt7470_data *data = dev_get_drvdata(dev);
707 long temp;
708 int err;
709
710 if (kstrtol(buf, 10, &temp))
711 return -EINVAL;
712
713 mutex_lock(&data->lock);
714 data->force_pwm_max = temp;
715 err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
716 ADT7470_FSPD_MASK,
717 temp ? ADT7470_FSPD_MASK : 0);
718 mutex_unlock(&data->lock);
719
720 return err < 0 ? err : count;
721}
722
723/* These are the valid PWM frequencies to the nearest Hz */
724static const int adt7470_freq_map[] = {
725 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
726};
727
728static int pwm1_freq_get(struct device *dev)
729{
730 struct adt7470_data *data = dev_get_drvdata(dev);
731 unsigned int cfg_reg_1, cfg_reg_2;
732 int index;
733 int err;
734
735 mutex_lock(&data->lock);
736 err = regmap_read(data->regmap, ADT7470_REG_CFG, &cfg_reg_1);
737 if (err < 0)
738 goto out;
739 err = regmap_read(data->regmap, ADT7470_REG_CFG_2, &cfg_reg_2);
740 if (err < 0)
741 goto out;
742 mutex_unlock(&data->lock);
743
744 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
745 if (!(cfg_reg_1 & ADT7470_CFG_LF))
746 index += 8;
747 if (index >= ARRAY_SIZE(adt7470_freq_map))
748 index = ARRAY_SIZE(adt7470_freq_map) - 1;
749
750 return adt7470_freq_map[index];
751
752out:
753 mutex_unlock(&data->lock);
754 return err;
755}
756
757static int adt7470_pwm_read(struct device *dev, u32 attr, int channel, long *val)
758{
759 struct adt7470_data *data = adt7470_update_device(dev);
760
761 if (IS_ERR(data))
762 return PTR_ERR(data);
763
764 switch (attr) {
765 case hwmon_pwm_input:
766 *val = data->pwm[channel];
767 break;
768 case hwmon_pwm_enable:
769 *val = 1 + data->pwm_automatic[channel];
770 break;
771 case hwmon_pwm_freq:
772 *val = pwm1_freq_get(dev);
773 break;
774 default:
775 return -EOPNOTSUPP;
776 }
777
778 return 0;
779}
780
781static int pwm1_freq_set(struct device *dev, long freq)
782{
783 struct adt7470_data *data = dev_get_drvdata(dev);
784 unsigned int low_freq = ADT7470_CFG_LF;
785 int index;
786 int err;
787
788 /* Round the user value given to the closest available frequency */
789 index = find_closest(freq, adt7470_freq_map,
790 ARRAY_SIZE(adt7470_freq_map));
791
792 if (index >= 8) {
793 index -= 8;
794 low_freq = 0;
795 }
796
797 mutex_lock(&data->lock);
798 /* Configuration Register 1 */
799 err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
800 ADT7470_CFG_LF, low_freq);
801 if (err < 0)
802 goto out;
803
804 /* Configuration Register 2 */
805 err = regmap_update_bits(data->regmap, ADT7470_REG_CFG_2,
806 ADT7470_FREQ_MASK,
807 index << ADT7470_FREQ_SHIFT);
808out:
809 mutex_unlock(&data->lock);
810
811 return err;
812}
813
814static int adt7470_pwm_write(struct device *dev, u32 attr, int channel, long val)
815{
816 struct adt7470_data *data = dev_get_drvdata(dev);
817 unsigned int pwm_auto_reg_mask;
818 int err;
819
820 switch (attr) {
821 case hwmon_pwm_input:
822 val = clamp_val(val, 0, 255);
823 mutex_lock(&data->lock);
824 data->pwm[channel] = val;
825 err = regmap_write(data->regmap, ADT7470_REG_PWM(channel),
826 data->pwm[channel]);
827 mutex_unlock(&data->lock);
828 break;
829 case hwmon_pwm_enable:
830 if (channel % 2)
831 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
832 else
833 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
834
835 if (val != 2 && val != 1)
836 return -EINVAL;
837 val--;
838
839 mutex_lock(&data->lock);
840 data->pwm_automatic[channel] = val;
841 err = regmap_update_bits(data->regmap, ADT7470_REG_PWM_CFG(channel),
842 pwm_auto_reg_mask,
843 val ? pwm_auto_reg_mask : 0);
844 mutex_unlock(&data->lock);
845 break;
846 case hwmon_pwm_freq:
847 err = pwm1_freq_set(dev, val);
848 break;
849 default:
850 return -EOPNOTSUPP;
851 }
852
853 return err;
854}
855
856static ssize_t pwm_max_show(struct device *dev,
857 struct device_attribute *devattr, char *buf)
858{
859 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
860 struct adt7470_data *data = adt7470_update_device(dev);
861
862 if (IS_ERR(data))
863 return PTR_ERR(data);
864
865 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
866}
867
868static ssize_t pwm_max_store(struct device *dev,
869 struct device_attribute *devattr,
870 const char *buf, size_t count)
871{
872 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
873 struct adt7470_data *data = dev_get_drvdata(dev);
874 long temp;
875 int err;
876
877 if (kstrtol(buf, 10, &temp))
878 return -EINVAL;
879
880 temp = clamp_val(temp, 0, 255);
881
882 mutex_lock(&data->lock);
883 data->pwm_max[attr->index] = temp;
884 err = regmap_write(data->regmap, ADT7470_REG_PWM_MAX(attr->index),
885 temp);
886 mutex_unlock(&data->lock);
887
888 return err < 0 ? err : count;
889}
890
891static ssize_t pwm_min_show(struct device *dev,
892 struct device_attribute *devattr, char *buf)
893{
894 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
895 struct adt7470_data *data = adt7470_update_device(dev);
896
897 if (IS_ERR(data))
898 return PTR_ERR(data);
899
900 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
901}
902
903static ssize_t pwm_min_store(struct device *dev,
904 struct device_attribute *devattr,
905 const char *buf, size_t count)
906{
907 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
908 struct adt7470_data *data = dev_get_drvdata(dev);
909 long temp;
910 int err;
911
912 if (kstrtol(buf, 10, &temp))
913 return -EINVAL;
914
915 temp = clamp_val(temp, 0, 255);
916
917 mutex_lock(&data->lock);
918 data->pwm_min[attr->index] = temp;
919 err = regmap_write(data->regmap, ADT7470_REG_PWM_MIN(attr->index),
920 temp);
921 mutex_unlock(&data->lock);
922
923 return err < 0 ? err : count;
924}
925
926static ssize_t pwm_tmax_show(struct device *dev,
927 struct device_attribute *devattr, char *buf)
928{
929 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
930 struct adt7470_data *data = adt7470_update_device(dev);
931
932 if (IS_ERR(data))
933 return PTR_ERR(data);
934
935 /* the datasheet says that tmax = tmin + 20C */
936 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
937}
938
939static ssize_t pwm_tmin_show(struct device *dev,
940 struct device_attribute *devattr, char *buf)
941{
942 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
943 struct adt7470_data *data = adt7470_update_device(dev);
944
945 if (IS_ERR(data))
946 return PTR_ERR(data);
947
948 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
949}
950
951static ssize_t pwm_tmin_store(struct device *dev,
952 struct device_attribute *devattr,
953 const char *buf, size_t count)
954{
955 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
956 struct adt7470_data *data = dev_get_drvdata(dev);
957 long temp;
958 int err;
959
960 if (kstrtol(buf, 10, &temp))
961 return -EINVAL;
962
963 temp = clamp_val(temp, -128000, 127000);
964 temp = DIV_ROUND_CLOSEST(temp, 1000);
965
966 mutex_lock(&data->lock);
967 data->pwm_tmin[attr->index] = temp;
968 err = regmap_write(data->regmap, ADT7470_REG_PWM_TMIN(attr->index),
969 temp);
970 mutex_unlock(&data->lock);
971
972 return err < 0 ? err : count;
973}
974
975static ssize_t pwm_auto_temp_show(struct device *dev,
976 struct device_attribute *devattr, char *buf)
977{
978 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
979 struct adt7470_data *data = adt7470_update_device(dev);
980 u8 ctrl;
981
982 if (IS_ERR(data))
983 return PTR_ERR(data);
984
985 ctrl = data->pwm_auto_temp[attr->index];
986 if (ctrl)
987 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
988 else
989 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
990}
991
992static int cvt_auto_temp(int input)
993{
994 if (input == ADT7470_PWM_ALL_TEMPS)
995 return 0;
996 if (input < 1 || !is_power_of_2(input))
997 return -EINVAL;
998 return ilog2(input) + 1;
999}
1000
1001static ssize_t pwm_auto_temp_store(struct device *dev,
1002 struct device_attribute *devattr,
1003 const char *buf, size_t count)
1004{
1005 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1006 struct adt7470_data *data = dev_get_drvdata(dev);
1007 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
1008 unsigned int mask, val;
1009 long temp;
1010 int err;
1011
1012 if (kstrtol(buf, 10, &temp))
1013 return -EINVAL;
1014
1015 temp = cvt_auto_temp(temp);
1016 if (temp < 0)
1017 return temp;
1018
1019 mutex_lock(&data->lock);
1020 data->pwm_automatic[attr->index] = temp;
1021
1022 if (!(attr->index % 2)) {
1023 mask = 0xF0;
1024 val = (temp << 4) & 0xF0;
1025 } else {
1026 mask = 0x0F;
1027 val = temp & 0x0F;
1028 }
1029
1030 err = regmap_update_bits(data->regmap, pwm_auto_reg, mask, val);
1031 mutex_unlock(&data->lock);
1032
1033 return err < 0 ? err : count;
1034}
1035
1036static DEVICE_ATTR_RW(alarm_mask);
1037static DEVICE_ATTR_RW(num_temp_sensors);
1038static DEVICE_ATTR_RW(auto_update_interval);
1039
1040static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0);
1041
1042static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0);
1043static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1);
1044static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2);
1045static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3);
1046
1047static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0);
1048static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1);
1049static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2);
1050static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3);
1051
1052static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_tmin, 0);
1053static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_temp, pwm_tmin, 1);
1054static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_temp, pwm_tmin, 2);
1055static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_temp, pwm_tmin, 3);
1056
1057static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point2_temp, pwm_tmax, 0);
1058static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1);
1059static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2);
1060static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3);
1061
1062static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0);
1063static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1);
1064static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2);
1065static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3);
1066
1067static struct attribute *adt7470_attrs[] = {
1068 &dev_attr_alarm_mask.attr,
1069 &dev_attr_num_temp_sensors.attr,
1070 &dev_attr_auto_update_interval.attr,
1071 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1072 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1073 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1074 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1075 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1076 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1077 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1078 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1079 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1080 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1081 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1082 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1083 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1084 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1085 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1086 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1087 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1088 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1089 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1090 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1091 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1092 NULL
1093};
1094
1095ATTRIBUTE_GROUPS(adt7470);
1096
1097static int adt7470_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
1098 int channel, long *val)
1099{
1100 switch (type) {
1101 case hwmon_temp:
1102 return adt7470_temp_read(dev, attr, channel, val);
1103 case hwmon_fan:
1104 return adt7470_fan_read(dev, attr, channel, val);
1105 case hwmon_pwm:
1106 return adt7470_pwm_read(dev, attr, channel, val);
1107 default:
1108 return -EOPNOTSUPP;
1109 }
1110}
1111
1112static int adt7470_write(struct device *dev, enum hwmon_sensor_types type, u32 attr,
1113 int channel, long val)
1114{
1115 switch (type) {
1116 case hwmon_temp:
1117 return adt7470_temp_write(dev, attr, channel, val);
1118 case hwmon_fan:
1119 return adt7470_fan_write(dev, attr, channel, val);
1120 case hwmon_pwm:
1121 return adt7470_pwm_write(dev, attr, channel, val);
1122 default:
1123 return -EOPNOTSUPP;
1124 }
1125}
1126
1127static umode_t adt7470_is_visible(const void *_data, enum hwmon_sensor_types type,
1128 u32 attr, int channel)
1129{
1130 umode_t mode = 0;
1131
1132 switch (type) {
1133 case hwmon_temp:
1134 switch (attr) {
1135 case hwmon_temp:
1136 case hwmon_temp_alarm:
1137 mode = 0444;
1138 break;
1139 case hwmon_temp_min:
1140 case hwmon_temp_max:
1141 mode = 0644;
1142 break;
1143 default:
1144 break;
1145 }
1146 break;
1147 case hwmon_fan:
1148 switch (attr) {
1149 case hwmon_fan_input:
1150 case hwmon_fan_alarm:
1151 mode = 0444;
1152 break;
1153 case hwmon_fan_min:
1154 case hwmon_fan_max:
1155 mode = 0644;
1156 break;
1157 default:
1158 break;
1159 }
1160 break;
1161 case hwmon_pwm:
1162 switch (attr) {
1163 case hwmon_pwm_input:
1164 case hwmon_pwm_enable:
1165 mode = 0644;
1166 break;
1167 case hwmon_pwm_freq:
1168 if (channel == 0)
1169 mode = 0644;
1170 else
1171 mode = 0;
1172 break;
1173 default:
1174 break;
1175 }
1176 break;
1177 default:
1178 break;
1179 }
1180
1181 return mode;
1182}
1183
1184static const struct hwmon_ops adt7470_hwmon_ops = {
1185 .is_visible = adt7470_is_visible,
1186 .read = adt7470_read,
1187 .write = adt7470_write,
1188};
1189
1190static const struct hwmon_channel_info * const adt7470_info[] = {
1191 HWMON_CHANNEL_INFO(temp,
1192 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
1193 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
1194 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
1195 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
1196 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
1197 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
1198 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
1199 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
1200 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
1201 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM),
1202 HWMON_CHANNEL_INFO(fan,
1203 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM,
1204 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM,
1205 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM,
1206 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM),
1207 HWMON_CHANNEL_INFO(pwm,
1208 HWMON_PWM_INPUT | HWMON_PWM_ENABLE | HWMON_PWM_FREQ,
1209 HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
1210 HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
1211 HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
1212 NULL
1213};
1214
1215static const struct hwmon_chip_info adt7470_chip_info = {
1216 .ops = &adt7470_hwmon_ops,
1217 .info = adt7470_info,
1218};
1219
1220/* Return 0 if detection is successful, -ENODEV otherwise */
1221static int adt7470_detect(struct i2c_client *client,
1222 struct i2c_board_info *info)
1223{
1224 struct i2c_adapter *adapter = client->adapter;
1225 int vendor, device, revision;
1226
1227 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1228 return -ENODEV;
1229
1230 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1231 if (vendor != ADT7470_VENDOR)
1232 return -ENODEV;
1233
1234 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1235 if (device != ADT7470_DEVICE)
1236 return -ENODEV;
1237
1238 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
1239 if (revision != ADT7470_REVISION)
1240 return -ENODEV;
1241
1242 strscpy(info->type, "adt7470", I2C_NAME_SIZE);
1243
1244 return 0;
1245}
1246
1247static const struct regmap_config adt7470_regmap_config = {
1248 .reg_bits = 8,
1249 .val_bits = 8,
1250 .use_single_read = true,
1251 .use_single_write = true,
1252};
1253
1254static int adt7470_probe(struct i2c_client *client)
1255{
1256 struct device *dev = &client->dev;
1257 struct adt7470_data *data;
1258 struct device *hwmon_dev;
1259 int err;
1260
1261 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
1262 if (!data)
1263 return -ENOMEM;
1264
1265 data->num_temp_sensors = -1;
1266 data->auto_update_interval = AUTO_UPDATE_INTERVAL;
1267 data->regmap = devm_regmap_init_i2c(client, &adt7470_regmap_config);
1268 if (IS_ERR(data->regmap))
1269 return PTR_ERR(data->regmap);
1270
1271 i2c_set_clientdata(client, data);
1272 mutex_init(&data->lock);
1273
1274 dev_info(&client->dev, "%s chip found\n", client->name);
1275
1276 /* Initialize the ADT7470 chip */
1277 err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
1278 ADT7470_STRT_MASK | ADT7470_TEST_MASK,
1279 ADT7470_STRT_MASK | ADT7470_TEST_MASK);
1280 if (err < 0)
1281 return err;
1282
1283 /* Register sysfs hooks */
1284 hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data,
1285 &adt7470_chip_info,
1286 adt7470_groups);
1287
1288 if (IS_ERR(hwmon_dev))
1289 return PTR_ERR(hwmon_dev);
1290
1291 data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
1292 dev_name(hwmon_dev));
1293 if (IS_ERR(data->auto_update))
1294 return PTR_ERR(data->auto_update);
1295
1296 return 0;
1297}
1298
1299static void adt7470_remove(struct i2c_client *client)
1300{
1301 struct adt7470_data *data = i2c_get_clientdata(client);
1302
1303 kthread_stop(data->auto_update);
1304}
1305
1306static const struct i2c_device_id adt7470_id[] = {
1307 { "adt7470", 0 },
1308 { }
1309};
1310MODULE_DEVICE_TABLE(i2c, adt7470_id);
1311
1312static struct i2c_driver adt7470_driver = {
1313 .class = I2C_CLASS_HWMON,
1314 .driver = {
1315 .name = "adt7470",
1316 },
1317 .probe = adt7470_probe,
1318 .remove = adt7470_remove,
1319 .id_table = adt7470_id,
1320 .detect = adt7470_detect,
1321 .address_list = normal_i2c,
1322};
1323
1324module_i2c_driver(adt7470_driver);
1325
1326MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1327MODULE_DESCRIPTION("ADT7470 driver");
1328MODULE_LICENSE("GPL");