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Merge tag 'iommu-updates-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
[mirror_ubuntu-artful-kernel.git] / drivers / hwmon / adt7470.c
1 /*
2 * A hwmon driver for the Analog Devices ADT7470
3 * Copyright (C) 2007 IBM
4 *
5 * Author: Darrick J. Wong <darrick.wong@oracle.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24 #include <linux/module.h>
25 #include <linux/jiffies.h>
26 #include <linux/i2c.h>
27 #include <linux/hwmon.h>
28 #include <linux/hwmon-sysfs.h>
29 #include <linux/err.h>
30 #include <linux/mutex.h>
31 #include <linux/delay.h>
32 #include <linux/log2.h>
33 #include <linux/kthread.h>
34 #include <linux/slab.h>
35 #include <linux/util_macros.h>
36
37 /* Addresses to scan */
38 static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
39
40 /* ADT7470 registers */
41 #define ADT7470_REG_BASE_ADDR 0x20
42 #define ADT7470_REG_TEMP_BASE_ADDR 0x20
43 #define ADT7470_REG_TEMP_MAX_ADDR 0x29
44 #define ADT7470_REG_FAN_BASE_ADDR 0x2A
45 #define ADT7470_REG_FAN_MAX_ADDR 0x31
46 #define ADT7470_REG_PWM_BASE_ADDR 0x32
47 #define ADT7470_REG_PWM_MAX_ADDR 0x35
48 #define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
49 #define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
50 #define ADT7470_REG_CFG 0x40
51 #define ADT7470_FSPD_MASK 0x04
52 #define ADT7470_REG_ALARM1 0x41
53 #define ADT7470_R1T_ALARM 0x01
54 #define ADT7470_R2T_ALARM 0x02
55 #define ADT7470_R3T_ALARM 0x04
56 #define ADT7470_R4T_ALARM 0x08
57 #define ADT7470_R5T_ALARM 0x10
58 #define ADT7470_R6T_ALARM 0x20
59 #define ADT7470_R7T_ALARM 0x40
60 #define ADT7470_OOL_ALARM 0x80
61 #define ADT7470_REG_ALARM2 0x42
62 #define ADT7470_R8T_ALARM 0x01
63 #define ADT7470_R9T_ALARM 0x02
64 #define ADT7470_R10T_ALARM 0x04
65 #define ADT7470_FAN1_ALARM 0x10
66 #define ADT7470_FAN2_ALARM 0x20
67 #define ADT7470_FAN3_ALARM 0x40
68 #define ADT7470_FAN4_ALARM 0x80
69 #define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
70 #define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
71 #define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
72 #define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
73 #define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
74 #define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
75 #define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
76 #define ADT7470_REG_PWM12_CFG 0x68
77 #define ADT7470_PWM2_AUTO_MASK 0x40
78 #define ADT7470_PWM1_AUTO_MASK 0x80
79 #define ADT7470_PWM_AUTO_MASK 0xC0
80 #define ADT7470_REG_PWM34_CFG 0x69
81 #define ADT7470_PWM3_AUTO_MASK 0x40
82 #define ADT7470_PWM4_AUTO_MASK 0x80
83 #define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
84 #define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
85 #define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
86 #define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
87 #define ADT7470_REG_CFG_2 0x74
88 #define ADT7470_REG_ACOUSTICS12 0x75
89 #define ADT7470_REG_ACOUSTICS34 0x76
90 #define ADT7470_REG_DEVICE 0x3D
91 #define ADT7470_REG_VENDOR 0x3E
92 #define ADT7470_REG_REVISION 0x3F
93 #define ADT7470_REG_ALARM1_MASK 0x72
94 #define ADT7470_REG_ALARM2_MASK 0x73
95 #define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
96 #define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
97 #define ADT7470_REG_MAX_ADDR 0x81
98
99 #define ADT7470_TEMP_COUNT 10
100 #define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
101 #define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
102 #define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
103 ((x) * 2) + 1)
104
105 #define ADT7470_FAN_COUNT 4
106 #define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
107 #define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
108 #define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
109
110 #define ADT7470_PWM_COUNT 4
111 #define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
112 #define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
113 #define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
114 #define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
115 #define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
116 #define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
117 ((x) / 2))
118
119 #define ALARM2(x) ((x) << 8)
120
121 #define ADT7470_VENDOR 0x41
122 #define ADT7470_DEVICE 0x70
123 /* datasheet only mentions a revision 2 */
124 #define ADT7470_REVISION 0x02
125
126 /* "all temps" according to hwmon sysfs interface spec */
127 #define ADT7470_PWM_ALL_TEMPS 0x3FF
128
129 /* How often do we reread sensors values? (In jiffies) */
130 #define SENSOR_REFRESH_INTERVAL (5 * HZ)
131
132 /* How often do we reread sensor limit values? (In jiffies) */
133 #define LIMIT_REFRESH_INTERVAL (60 * HZ)
134
135 /* Wait at least 200ms per sensor for 10 sensors */
136 #define TEMP_COLLECTION_TIME 2000
137
138 /* auto update thing won't fire more than every 2s */
139 #define AUTO_UPDATE_INTERVAL 2000
140
141 /* datasheet says to divide this number by the fan reading to get fan rpm */
142 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
143 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
144 #define FAN_PERIOD_INVALID 65535
145 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
146
147 /* Config registers 1 and 2 include fields for selecting the PWM frequency */
148 #define ADT7470_CFG_LF 0x40
149 #define ADT7470_FREQ_MASK 0x70
150 #define ADT7470_FREQ_SHIFT 4
151
152 struct adt7470_data {
153 struct i2c_client *client;
154 struct mutex lock;
155 char sensors_valid;
156 char limits_valid;
157 unsigned long sensors_last_updated; /* In jiffies */
158 unsigned long limits_last_updated; /* In jiffies */
159
160 int num_temp_sensors; /* -1 = probe */
161 int temperatures_probed;
162
163 s8 temp[ADT7470_TEMP_COUNT];
164 s8 temp_min[ADT7470_TEMP_COUNT];
165 s8 temp_max[ADT7470_TEMP_COUNT];
166 u16 fan[ADT7470_FAN_COUNT];
167 u16 fan_min[ADT7470_FAN_COUNT];
168 u16 fan_max[ADT7470_FAN_COUNT];
169 u16 alarm;
170 u16 alarms_mask;
171 u8 force_pwm_max;
172 u8 pwm[ADT7470_PWM_COUNT];
173 u8 pwm_max[ADT7470_PWM_COUNT];
174 u8 pwm_automatic[ADT7470_PWM_COUNT];
175 u8 pwm_min[ADT7470_PWM_COUNT];
176 s8 pwm_tmin[ADT7470_PWM_COUNT];
177 u8 pwm_auto_temp[ADT7470_PWM_COUNT];
178
179 struct task_struct *auto_update;
180 unsigned int auto_update_interval;
181 };
182
183 /*
184 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says
185 * that the low byte must be read before the high byte.
186 */
187 static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
188 {
189 u16 foo;
190 foo = i2c_smbus_read_byte_data(client, reg);
191 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
192 return foo;
193 }
194
195 static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
196 u16 value)
197 {
198 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
199 || i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
200 }
201
202 /* Probe for temperature sensors. Assumes lock is held */
203 static int adt7470_read_temperatures(struct i2c_client *client,
204 struct adt7470_data *data)
205 {
206 unsigned long res;
207 int i;
208 u8 cfg, pwm[4], pwm_cfg[2];
209
210 /* save pwm[1-4] config register */
211 pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
212 pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
213
214 /* set manual pwm to whatever it is set to now */
215 for (i = 0; i < ADT7470_FAN_COUNT; i++)
216 pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
217
218 /* put pwm in manual mode */
219 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
220 pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
221 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
222 pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
223
224 /* write pwm control to whatever it was */
225 for (i = 0; i < ADT7470_FAN_COUNT; i++)
226 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
227
228 /* start reading temperature sensors */
229 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
230 cfg |= 0x80;
231 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
232
233 /* Delay is 200ms * number of temp sensors. */
234 res = msleep_interruptible((data->num_temp_sensors >= 0 ?
235 data->num_temp_sensors * 200 :
236 TEMP_COLLECTION_TIME));
237
238 /* done reading temperature sensors */
239 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
240 cfg &= ~0x80;
241 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
242
243 /* restore pwm[1-4] config registers */
244 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
245 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
246
247 if (res) {
248 pr_err("ha ha, interrupted\n");
249 return -EAGAIN;
250 }
251
252 /* Only count fans if we have to */
253 if (data->num_temp_sensors >= 0)
254 return 0;
255
256 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
257 data->temp[i] = i2c_smbus_read_byte_data(client,
258 ADT7470_TEMP_REG(i));
259 if (data->temp[i])
260 data->num_temp_sensors = i + 1;
261 }
262 data->temperatures_probed = 1;
263 return 0;
264 }
265
266 static int adt7470_update_thread(void *p)
267 {
268 struct i2c_client *client = p;
269 struct adt7470_data *data = i2c_get_clientdata(client);
270
271 while (!kthread_should_stop()) {
272 mutex_lock(&data->lock);
273 adt7470_read_temperatures(client, data);
274 mutex_unlock(&data->lock);
275
276 set_current_state(TASK_INTERRUPTIBLE);
277 if (kthread_should_stop())
278 break;
279
280 schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
281 }
282
283 return 0;
284 }
285
286 static struct adt7470_data *adt7470_update_device(struct device *dev)
287 {
288 struct adt7470_data *data = dev_get_drvdata(dev);
289 struct i2c_client *client = data->client;
290 unsigned long local_jiffies = jiffies;
291 u8 cfg;
292 int i;
293 int need_sensors = 1;
294 int need_limits = 1;
295
296 /*
297 * Figure out if we need to update the shadow registers.
298 * Lockless means that we may occasionally report out of
299 * date data.
300 */
301 if (time_before(local_jiffies, data->sensors_last_updated +
302 SENSOR_REFRESH_INTERVAL) &&
303 data->sensors_valid)
304 need_sensors = 0;
305
306 if (time_before(local_jiffies, data->limits_last_updated +
307 LIMIT_REFRESH_INTERVAL) &&
308 data->limits_valid)
309 need_limits = 0;
310
311 if (!need_sensors && !need_limits)
312 return data;
313
314 mutex_lock(&data->lock);
315 if (!need_sensors)
316 goto no_sensor_update;
317
318 if (!data->temperatures_probed)
319 adt7470_read_temperatures(client, data);
320 else
321 for (i = 0; i < ADT7470_TEMP_COUNT; i++)
322 data->temp[i] = i2c_smbus_read_byte_data(client,
323 ADT7470_TEMP_REG(i));
324
325 for (i = 0; i < ADT7470_FAN_COUNT; i++)
326 data->fan[i] = adt7470_read_word_data(client,
327 ADT7470_REG_FAN(i));
328
329 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
330 int reg;
331 int reg_mask;
332
333 data->pwm[i] = i2c_smbus_read_byte_data(client,
334 ADT7470_REG_PWM(i));
335
336 if (i % 2)
337 reg_mask = ADT7470_PWM2_AUTO_MASK;
338 else
339 reg_mask = ADT7470_PWM1_AUTO_MASK;
340
341 reg = ADT7470_REG_PWM_CFG(i);
342 if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
343 data->pwm_automatic[i] = 1;
344 else
345 data->pwm_automatic[i] = 0;
346
347 reg = ADT7470_REG_PWM_AUTO_TEMP(i);
348 cfg = i2c_smbus_read_byte_data(client, reg);
349 if (!(i % 2))
350 data->pwm_auto_temp[i] = cfg >> 4;
351 else
352 data->pwm_auto_temp[i] = cfg & 0xF;
353 }
354
355 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
356 ADT7470_FSPD_MASK)
357 data->force_pwm_max = 1;
358 else
359 data->force_pwm_max = 0;
360
361 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
362 if (data->alarm & ADT7470_OOL_ALARM)
363 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
364 ADT7470_REG_ALARM2));
365 data->alarms_mask = adt7470_read_word_data(client,
366 ADT7470_REG_ALARM1_MASK);
367
368 data->sensors_last_updated = local_jiffies;
369 data->sensors_valid = 1;
370
371 no_sensor_update:
372 if (!need_limits)
373 goto out;
374
375 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
376 data->temp_min[i] = i2c_smbus_read_byte_data(client,
377 ADT7470_TEMP_MIN_REG(i));
378 data->temp_max[i] = i2c_smbus_read_byte_data(client,
379 ADT7470_TEMP_MAX_REG(i));
380 }
381
382 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
383 data->fan_min[i] = adt7470_read_word_data(client,
384 ADT7470_REG_FAN_MIN(i));
385 data->fan_max[i] = adt7470_read_word_data(client,
386 ADT7470_REG_FAN_MAX(i));
387 }
388
389 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
390 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
391 ADT7470_REG_PWM_MAX(i));
392 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
393 ADT7470_REG_PWM_MIN(i));
394 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
395 ADT7470_REG_PWM_TMIN(i));
396 }
397
398 data->limits_last_updated = local_jiffies;
399 data->limits_valid = 1;
400
401 out:
402 mutex_unlock(&data->lock);
403 return data;
404 }
405
406 static ssize_t show_auto_update_interval(struct device *dev,
407 struct device_attribute *devattr,
408 char *buf)
409 {
410 struct adt7470_data *data = adt7470_update_device(dev);
411 return sprintf(buf, "%d\n", data->auto_update_interval);
412 }
413
414 static ssize_t set_auto_update_interval(struct device *dev,
415 struct device_attribute *devattr,
416 const char *buf,
417 size_t count)
418 {
419 struct adt7470_data *data = dev_get_drvdata(dev);
420 long temp;
421
422 if (kstrtol(buf, 10, &temp))
423 return -EINVAL;
424
425 temp = clamp_val(temp, 0, 60000);
426
427 mutex_lock(&data->lock);
428 data->auto_update_interval = temp;
429 mutex_unlock(&data->lock);
430
431 return count;
432 }
433
434 static ssize_t show_num_temp_sensors(struct device *dev,
435 struct device_attribute *devattr,
436 char *buf)
437 {
438 struct adt7470_data *data = adt7470_update_device(dev);
439 return sprintf(buf, "%d\n", data->num_temp_sensors);
440 }
441
442 static ssize_t set_num_temp_sensors(struct device *dev,
443 struct device_attribute *devattr,
444 const char *buf,
445 size_t count)
446 {
447 struct adt7470_data *data = dev_get_drvdata(dev);
448 long temp;
449
450 if (kstrtol(buf, 10, &temp))
451 return -EINVAL;
452
453 temp = clamp_val(temp, -1, 10);
454
455 mutex_lock(&data->lock);
456 data->num_temp_sensors = temp;
457 if (temp < 0)
458 data->temperatures_probed = 0;
459 mutex_unlock(&data->lock);
460
461 return count;
462 }
463
464 static ssize_t show_temp_min(struct device *dev,
465 struct device_attribute *devattr,
466 char *buf)
467 {
468 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
469 struct adt7470_data *data = adt7470_update_device(dev);
470 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
471 }
472
473 static ssize_t set_temp_min(struct device *dev,
474 struct device_attribute *devattr,
475 const char *buf,
476 size_t count)
477 {
478 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
479 struct adt7470_data *data = dev_get_drvdata(dev);
480 struct i2c_client *client = data->client;
481 long temp;
482
483 if (kstrtol(buf, 10, &temp))
484 return -EINVAL;
485
486 temp = DIV_ROUND_CLOSEST(temp, 1000);
487 temp = clamp_val(temp, -128, 127);
488
489 mutex_lock(&data->lock);
490 data->temp_min[attr->index] = temp;
491 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
492 temp);
493 mutex_unlock(&data->lock);
494
495 return count;
496 }
497
498 static ssize_t show_temp_max(struct device *dev,
499 struct device_attribute *devattr,
500 char *buf)
501 {
502 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
503 struct adt7470_data *data = adt7470_update_device(dev);
504 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
505 }
506
507 static ssize_t set_temp_max(struct device *dev,
508 struct device_attribute *devattr,
509 const char *buf,
510 size_t count)
511 {
512 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
513 struct adt7470_data *data = dev_get_drvdata(dev);
514 struct i2c_client *client = data->client;
515 long temp;
516
517 if (kstrtol(buf, 10, &temp))
518 return -EINVAL;
519
520 temp = DIV_ROUND_CLOSEST(temp, 1000);
521 temp = clamp_val(temp, -128, 127);
522
523 mutex_lock(&data->lock);
524 data->temp_max[attr->index] = temp;
525 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
526 temp);
527 mutex_unlock(&data->lock);
528
529 return count;
530 }
531
532 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
533 char *buf)
534 {
535 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
536 struct adt7470_data *data = adt7470_update_device(dev);
537 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
538 }
539
540 static ssize_t show_alarm_mask(struct device *dev,
541 struct device_attribute *devattr,
542 char *buf)
543 {
544 struct adt7470_data *data = adt7470_update_device(dev);
545
546 return sprintf(buf, "%x\n", data->alarms_mask);
547 }
548
549 static ssize_t set_alarm_mask(struct device *dev,
550 struct device_attribute *devattr,
551 const char *buf,
552 size_t count)
553 {
554 struct adt7470_data *data = dev_get_drvdata(dev);
555 long mask;
556
557 if (kstrtoul(buf, 0, &mask))
558 return -EINVAL;
559
560 if (mask & ~0xffff)
561 return -EINVAL;
562
563 mutex_lock(&data->lock);
564 data->alarms_mask = mask;
565 adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask);
566 mutex_unlock(&data->lock);
567
568 return count;
569 }
570
571 static ssize_t show_fan_max(struct device *dev,
572 struct device_attribute *devattr,
573 char *buf)
574 {
575 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
576 struct adt7470_data *data = adt7470_update_device(dev);
577
578 if (FAN_DATA_VALID(data->fan_max[attr->index]))
579 return sprintf(buf, "%d\n",
580 FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
581 else
582 return sprintf(buf, "0\n");
583 }
584
585 static ssize_t set_fan_max(struct device *dev,
586 struct device_attribute *devattr,
587 const char *buf, size_t count)
588 {
589 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
590 struct adt7470_data *data = dev_get_drvdata(dev);
591 struct i2c_client *client = data->client;
592 long temp;
593
594 if (kstrtol(buf, 10, &temp) || !temp)
595 return -EINVAL;
596
597 temp = FAN_RPM_TO_PERIOD(temp);
598 temp = clamp_val(temp, 1, 65534);
599
600 mutex_lock(&data->lock);
601 data->fan_max[attr->index] = temp;
602 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
603 mutex_unlock(&data->lock);
604
605 return count;
606 }
607
608 static ssize_t show_fan_min(struct device *dev,
609 struct device_attribute *devattr,
610 char *buf)
611 {
612 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
613 struct adt7470_data *data = adt7470_update_device(dev);
614
615 if (FAN_DATA_VALID(data->fan_min[attr->index]))
616 return sprintf(buf, "%d\n",
617 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
618 else
619 return sprintf(buf, "0\n");
620 }
621
622 static ssize_t set_fan_min(struct device *dev,
623 struct device_attribute *devattr,
624 const char *buf, size_t count)
625 {
626 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
627 struct adt7470_data *data = dev_get_drvdata(dev);
628 struct i2c_client *client = data->client;
629 long temp;
630
631 if (kstrtol(buf, 10, &temp) || !temp)
632 return -EINVAL;
633
634 temp = FAN_RPM_TO_PERIOD(temp);
635 temp = clamp_val(temp, 1, 65534);
636
637 mutex_lock(&data->lock);
638 data->fan_min[attr->index] = temp;
639 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
640 mutex_unlock(&data->lock);
641
642 return count;
643 }
644
645 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
646 char *buf)
647 {
648 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
649 struct adt7470_data *data = adt7470_update_device(dev);
650
651 if (FAN_DATA_VALID(data->fan[attr->index]))
652 return sprintf(buf, "%d\n",
653 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
654 else
655 return sprintf(buf, "0\n");
656 }
657
658 static ssize_t show_force_pwm_max(struct device *dev,
659 struct device_attribute *devattr,
660 char *buf)
661 {
662 struct adt7470_data *data = adt7470_update_device(dev);
663 return sprintf(buf, "%d\n", data->force_pwm_max);
664 }
665
666 static ssize_t set_force_pwm_max(struct device *dev,
667 struct device_attribute *devattr,
668 const char *buf,
669 size_t count)
670 {
671 struct adt7470_data *data = dev_get_drvdata(dev);
672 struct i2c_client *client = data->client;
673 long temp;
674 u8 reg;
675
676 if (kstrtol(buf, 10, &temp))
677 return -EINVAL;
678
679 mutex_lock(&data->lock);
680 data->force_pwm_max = temp;
681 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
682 if (temp)
683 reg |= ADT7470_FSPD_MASK;
684 else
685 reg &= ~ADT7470_FSPD_MASK;
686 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
687 mutex_unlock(&data->lock);
688
689 return count;
690 }
691
692 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
693 char *buf)
694 {
695 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
696 struct adt7470_data *data = adt7470_update_device(dev);
697 return sprintf(buf, "%d\n", data->pwm[attr->index]);
698 }
699
700 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
701 const char *buf, size_t count)
702 {
703 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
704 struct adt7470_data *data = dev_get_drvdata(dev);
705 struct i2c_client *client = data->client;
706 long temp;
707
708 if (kstrtol(buf, 10, &temp))
709 return -EINVAL;
710
711 temp = clamp_val(temp, 0, 255);
712
713 mutex_lock(&data->lock);
714 data->pwm[attr->index] = temp;
715 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
716 mutex_unlock(&data->lock);
717
718 return count;
719 }
720
721 /* These are the valid PWM frequencies to the nearest Hz */
722 static const int adt7470_freq_map[] = {
723 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
724 };
725
726 static ssize_t show_pwm_freq(struct device *dev,
727 struct device_attribute *devattr, char *buf)
728 {
729 struct adt7470_data *data = adt7470_update_device(dev);
730 unsigned char cfg_reg_1;
731 unsigned char cfg_reg_2;
732 int index;
733
734 mutex_lock(&data->lock);
735 cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
736 cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
737 mutex_unlock(&data->lock);
738
739 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
740 if (!(cfg_reg_1 & ADT7470_CFG_LF))
741 index += 8;
742 if (index >= ARRAY_SIZE(adt7470_freq_map))
743 index = ARRAY_SIZE(adt7470_freq_map) - 1;
744
745 return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
746 }
747
748 static ssize_t set_pwm_freq(struct device *dev,
749 struct device_attribute *devattr,
750 const char *buf, size_t count)
751 {
752 struct adt7470_data *data = dev_get_drvdata(dev);
753 struct i2c_client *client = data->client;
754 long freq;
755 int index;
756 int low_freq = ADT7470_CFG_LF;
757 unsigned char val;
758
759 if (kstrtol(buf, 10, &freq))
760 return -EINVAL;
761
762 /* Round the user value given to the closest available frequency */
763 index = find_closest(freq, adt7470_freq_map,
764 ARRAY_SIZE(adt7470_freq_map));
765
766 if (index >= 8) {
767 index -= 8;
768 low_freq = 0;
769 }
770
771 mutex_lock(&data->lock);
772 /* Configuration Register 1 */
773 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
774 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
775 (val & ~ADT7470_CFG_LF) | low_freq);
776 /* Configuration Register 2 */
777 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
778 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
779 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
780 mutex_unlock(&data->lock);
781
782 return count;
783 }
784
785 static ssize_t show_pwm_max(struct device *dev,
786 struct device_attribute *devattr,
787 char *buf)
788 {
789 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
790 struct adt7470_data *data = adt7470_update_device(dev);
791 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
792 }
793
794 static ssize_t set_pwm_max(struct device *dev,
795 struct device_attribute *devattr,
796 const char *buf,
797 size_t count)
798 {
799 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
800 struct adt7470_data *data = dev_get_drvdata(dev);
801 struct i2c_client *client = data->client;
802 long temp;
803
804 if (kstrtol(buf, 10, &temp))
805 return -EINVAL;
806
807 temp = clamp_val(temp, 0, 255);
808
809 mutex_lock(&data->lock);
810 data->pwm_max[attr->index] = temp;
811 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
812 temp);
813 mutex_unlock(&data->lock);
814
815 return count;
816 }
817
818 static ssize_t show_pwm_min(struct device *dev,
819 struct device_attribute *devattr,
820 char *buf)
821 {
822 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
823 struct adt7470_data *data = adt7470_update_device(dev);
824 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
825 }
826
827 static ssize_t set_pwm_min(struct device *dev,
828 struct device_attribute *devattr,
829 const char *buf,
830 size_t count)
831 {
832 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
833 struct adt7470_data *data = dev_get_drvdata(dev);
834 struct i2c_client *client = data->client;
835 long temp;
836
837 if (kstrtol(buf, 10, &temp))
838 return -EINVAL;
839
840 temp = clamp_val(temp, 0, 255);
841
842 mutex_lock(&data->lock);
843 data->pwm_min[attr->index] = temp;
844 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
845 temp);
846 mutex_unlock(&data->lock);
847
848 return count;
849 }
850
851 static ssize_t show_pwm_tmax(struct device *dev,
852 struct device_attribute *devattr,
853 char *buf)
854 {
855 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
856 struct adt7470_data *data = adt7470_update_device(dev);
857 /* the datasheet says that tmax = tmin + 20C */
858 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
859 }
860
861 static ssize_t show_pwm_tmin(struct device *dev,
862 struct device_attribute *devattr,
863 char *buf)
864 {
865 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
866 struct adt7470_data *data = adt7470_update_device(dev);
867 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
868 }
869
870 static ssize_t set_pwm_tmin(struct device *dev,
871 struct device_attribute *devattr,
872 const char *buf,
873 size_t count)
874 {
875 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
876 struct adt7470_data *data = dev_get_drvdata(dev);
877 struct i2c_client *client = data->client;
878 long temp;
879
880 if (kstrtol(buf, 10, &temp))
881 return -EINVAL;
882
883 temp = DIV_ROUND_CLOSEST(temp, 1000);
884 temp = clamp_val(temp, -128, 127);
885
886 mutex_lock(&data->lock);
887 data->pwm_tmin[attr->index] = temp;
888 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
889 temp);
890 mutex_unlock(&data->lock);
891
892 return count;
893 }
894
895 static ssize_t show_pwm_auto(struct device *dev,
896 struct device_attribute *devattr,
897 char *buf)
898 {
899 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
900 struct adt7470_data *data = adt7470_update_device(dev);
901 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
902 }
903
904 static ssize_t set_pwm_auto(struct device *dev,
905 struct device_attribute *devattr,
906 const char *buf,
907 size_t count)
908 {
909 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
910 struct adt7470_data *data = dev_get_drvdata(dev);
911 struct i2c_client *client = data->client;
912 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
913 int pwm_auto_reg_mask;
914 long temp;
915 u8 reg;
916
917 if (kstrtol(buf, 10, &temp))
918 return -EINVAL;
919
920 if (attr->index % 2)
921 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
922 else
923 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
924
925 if (temp != 2 && temp != 1)
926 return -EINVAL;
927 temp--;
928
929 mutex_lock(&data->lock);
930 data->pwm_automatic[attr->index] = temp;
931 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
932 if (temp)
933 reg |= pwm_auto_reg_mask;
934 else
935 reg &= ~pwm_auto_reg_mask;
936 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
937 mutex_unlock(&data->lock);
938
939 return count;
940 }
941
942 static ssize_t show_pwm_auto_temp(struct device *dev,
943 struct device_attribute *devattr,
944 char *buf)
945 {
946 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
947 struct adt7470_data *data = adt7470_update_device(dev);
948 u8 ctrl = data->pwm_auto_temp[attr->index];
949
950 if (ctrl)
951 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
952 else
953 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
954 }
955
956 static int cvt_auto_temp(int input)
957 {
958 if (input == ADT7470_PWM_ALL_TEMPS)
959 return 0;
960 if (input < 1 || !is_power_of_2(input))
961 return -EINVAL;
962 return ilog2(input) + 1;
963 }
964
965 static ssize_t set_pwm_auto_temp(struct device *dev,
966 struct device_attribute *devattr,
967 const char *buf,
968 size_t count)
969 {
970 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
971 struct adt7470_data *data = dev_get_drvdata(dev);
972 struct i2c_client *client = data->client;
973 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
974 long temp;
975 u8 reg;
976
977 if (kstrtol(buf, 10, &temp))
978 return -EINVAL;
979
980 temp = cvt_auto_temp(temp);
981 if (temp < 0)
982 return temp;
983
984 mutex_lock(&data->lock);
985 data->pwm_automatic[attr->index] = temp;
986 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
987
988 if (!(attr->index % 2)) {
989 reg &= 0xF;
990 reg |= (temp << 4) & 0xF0;
991 } else {
992 reg &= 0xF0;
993 reg |= temp & 0xF;
994 }
995
996 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
997 mutex_unlock(&data->lock);
998
999 return count;
1000 }
1001
1002 static ssize_t show_alarm(struct device *dev,
1003 struct device_attribute *devattr,
1004 char *buf)
1005 {
1006 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1007 struct adt7470_data *data = adt7470_update_device(dev);
1008
1009 if (data->alarm & attr->index)
1010 return sprintf(buf, "1\n");
1011 else
1012 return sprintf(buf, "0\n");
1013 }
1014
1015 static DEVICE_ATTR(alarm_mask, S_IWUSR | S_IRUGO, show_alarm_mask,
1016 set_alarm_mask);
1017 static DEVICE_ATTR(num_temp_sensors, S_IWUSR | S_IRUGO, show_num_temp_sensors,
1018 set_num_temp_sensors);
1019 static DEVICE_ATTR(auto_update_interval, S_IWUSR | S_IRUGO,
1020 show_auto_update_interval, set_auto_update_interval);
1021
1022 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
1023 set_temp_max, 0);
1024 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
1025 set_temp_max, 1);
1026 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
1027 set_temp_max, 2);
1028 static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max,
1029 set_temp_max, 3);
1030 static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max,
1031 set_temp_max, 4);
1032 static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max,
1033 set_temp_max, 5);
1034 static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max,
1035 set_temp_max, 6);
1036 static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max,
1037 set_temp_max, 7);
1038 static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max,
1039 set_temp_max, 8);
1040 static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max,
1041 set_temp_max, 9);
1042
1043 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
1044 set_temp_min, 0);
1045 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
1046 set_temp_min, 1);
1047 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
1048 set_temp_min, 2);
1049 static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min,
1050 set_temp_min, 3);
1051 static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min,
1052 set_temp_min, 4);
1053 static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min,
1054 set_temp_min, 5);
1055 static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min,
1056 set_temp_min, 6);
1057 static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min,
1058 set_temp_min, 7);
1059 static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min,
1060 set_temp_min, 8);
1061 static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min,
1062 set_temp_min, 9);
1063
1064 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
1065 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
1066 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
1067 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
1068 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
1069 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
1070 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
1071 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
1072 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8);
1073 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9);
1074
1075 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
1076 ADT7470_R1T_ALARM);
1077 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
1078 ADT7470_R2T_ALARM);
1079 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
1080 ADT7470_R3T_ALARM);
1081 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL,
1082 ADT7470_R4T_ALARM);
1083 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL,
1084 ADT7470_R5T_ALARM);
1085 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL,
1086 ADT7470_R6T_ALARM);
1087 static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL,
1088 ADT7470_R7T_ALARM);
1089 static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL,
1090 ALARM2(ADT7470_R8T_ALARM));
1091 static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL,
1092 ALARM2(ADT7470_R9T_ALARM));
1093 static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL,
1094 ALARM2(ADT7470_R10T_ALARM));
1095
1096 static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
1097 set_fan_max, 0);
1098 static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
1099 set_fan_max, 1);
1100 static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
1101 set_fan_max, 2);
1102 static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max,
1103 set_fan_max, 3);
1104
1105 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
1106 set_fan_min, 0);
1107 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
1108 set_fan_min, 1);
1109 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
1110 set_fan_min, 2);
1111 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
1112 set_fan_min, 3);
1113
1114 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
1115 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
1116 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
1117 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
1118
1119 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
1120 ALARM2(ADT7470_FAN1_ALARM));
1121 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
1122 ALARM2(ADT7470_FAN2_ALARM));
1123 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
1124 ALARM2(ADT7470_FAN3_ALARM));
1125 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
1126 ALARM2(ADT7470_FAN4_ALARM));
1127
1128 static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO,
1129 show_force_pwm_max, set_force_pwm_max, 0);
1130
1131 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
1132 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
1133 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
1134 static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
1135
1136 static DEVICE_ATTR(pwm1_freq, S_IWUSR | S_IRUGO, show_pwm_freq, set_pwm_freq);
1137
1138 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
1139 show_pwm_min, set_pwm_min, 0);
1140 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
1141 show_pwm_min, set_pwm_min, 1);
1142 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
1143 show_pwm_min, set_pwm_min, 2);
1144 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO,
1145 show_pwm_min, set_pwm_min, 3);
1146
1147 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
1148 show_pwm_max, set_pwm_max, 0);
1149 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
1150 show_pwm_max, set_pwm_max, 1);
1151 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
1152 show_pwm_max, set_pwm_max, 2);
1153 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO,
1154 show_pwm_max, set_pwm_max, 3);
1155
1156 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
1157 show_pwm_tmin, set_pwm_tmin, 0);
1158 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO,
1159 show_pwm_tmin, set_pwm_tmin, 1);
1160 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO,
1161 show_pwm_tmin, set_pwm_tmin, 2);
1162 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO,
1163 show_pwm_tmin, set_pwm_tmin, 3);
1164
1165 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1166 NULL, 0);
1167 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1168 NULL, 1);
1169 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1170 NULL, 2);
1171 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1172 NULL, 3);
1173
1174 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1175 set_pwm_auto, 0);
1176 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1177 set_pwm_auto, 1);
1178 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1179 set_pwm_auto, 2);
1180 static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1181 set_pwm_auto, 3);
1182
1183 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
1184 show_pwm_auto_temp, set_pwm_auto_temp, 0);
1185 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
1186 show_pwm_auto_temp, set_pwm_auto_temp, 1);
1187 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
1188 show_pwm_auto_temp, set_pwm_auto_temp, 2);
1189 static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
1190 show_pwm_auto_temp, set_pwm_auto_temp, 3);
1191
1192 static struct attribute *adt7470_attrs[] = {
1193 &dev_attr_alarm_mask.attr,
1194 &dev_attr_num_temp_sensors.attr,
1195 &dev_attr_auto_update_interval.attr,
1196 &sensor_dev_attr_temp1_max.dev_attr.attr,
1197 &sensor_dev_attr_temp2_max.dev_attr.attr,
1198 &sensor_dev_attr_temp3_max.dev_attr.attr,
1199 &sensor_dev_attr_temp4_max.dev_attr.attr,
1200 &sensor_dev_attr_temp5_max.dev_attr.attr,
1201 &sensor_dev_attr_temp6_max.dev_attr.attr,
1202 &sensor_dev_attr_temp7_max.dev_attr.attr,
1203 &sensor_dev_attr_temp8_max.dev_attr.attr,
1204 &sensor_dev_attr_temp9_max.dev_attr.attr,
1205 &sensor_dev_attr_temp10_max.dev_attr.attr,
1206 &sensor_dev_attr_temp1_min.dev_attr.attr,
1207 &sensor_dev_attr_temp2_min.dev_attr.attr,
1208 &sensor_dev_attr_temp3_min.dev_attr.attr,
1209 &sensor_dev_attr_temp4_min.dev_attr.attr,
1210 &sensor_dev_attr_temp5_min.dev_attr.attr,
1211 &sensor_dev_attr_temp6_min.dev_attr.attr,
1212 &sensor_dev_attr_temp7_min.dev_attr.attr,
1213 &sensor_dev_attr_temp8_min.dev_attr.attr,
1214 &sensor_dev_attr_temp9_min.dev_attr.attr,
1215 &sensor_dev_attr_temp10_min.dev_attr.attr,
1216 &sensor_dev_attr_temp1_input.dev_attr.attr,
1217 &sensor_dev_attr_temp2_input.dev_attr.attr,
1218 &sensor_dev_attr_temp3_input.dev_attr.attr,
1219 &sensor_dev_attr_temp4_input.dev_attr.attr,
1220 &sensor_dev_attr_temp5_input.dev_attr.attr,
1221 &sensor_dev_attr_temp6_input.dev_attr.attr,
1222 &sensor_dev_attr_temp7_input.dev_attr.attr,
1223 &sensor_dev_attr_temp8_input.dev_attr.attr,
1224 &sensor_dev_attr_temp9_input.dev_attr.attr,
1225 &sensor_dev_attr_temp10_input.dev_attr.attr,
1226 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1227 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1228 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1229 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
1230 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
1231 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
1232 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
1233 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
1234 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
1235 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
1236 &sensor_dev_attr_fan1_max.dev_attr.attr,
1237 &sensor_dev_attr_fan2_max.dev_attr.attr,
1238 &sensor_dev_attr_fan3_max.dev_attr.attr,
1239 &sensor_dev_attr_fan4_max.dev_attr.attr,
1240 &sensor_dev_attr_fan1_min.dev_attr.attr,
1241 &sensor_dev_attr_fan2_min.dev_attr.attr,
1242 &sensor_dev_attr_fan3_min.dev_attr.attr,
1243 &sensor_dev_attr_fan4_min.dev_attr.attr,
1244 &sensor_dev_attr_fan1_input.dev_attr.attr,
1245 &sensor_dev_attr_fan2_input.dev_attr.attr,
1246 &sensor_dev_attr_fan3_input.dev_attr.attr,
1247 &sensor_dev_attr_fan4_input.dev_attr.attr,
1248 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1249 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1250 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1251 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1252 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1253 &sensor_dev_attr_pwm1.dev_attr.attr,
1254 &dev_attr_pwm1_freq.attr,
1255 &sensor_dev_attr_pwm2.dev_attr.attr,
1256 &sensor_dev_attr_pwm3.dev_attr.attr,
1257 &sensor_dev_attr_pwm4.dev_attr.attr,
1258 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1259 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1260 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1261 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1262 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1263 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1264 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1265 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1266 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1267 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1268 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1269 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1270 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1271 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1272 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1273 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1274 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1275 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1276 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1277 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1278 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1279 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1280 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1281 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1282 NULL
1283 };
1284
1285 ATTRIBUTE_GROUPS(adt7470);
1286
1287 /* Return 0 if detection is successful, -ENODEV otherwise */
1288 static int adt7470_detect(struct i2c_client *client,
1289 struct i2c_board_info *info)
1290 {
1291 struct i2c_adapter *adapter = client->adapter;
1292 int vendor, device, revision;
1293
1294 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1295 return -ENODEV;
1296
1297 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1298 if (vendor != ADT7470_VENDOR)
1299 return -ENODEV;
1300
1301 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1302 if (device != ADT7470_DEVICE)
1303 return -ENODEV;
1304
1305 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
1306 if (revision != ADT7470_REVISION)
1307 return -ENODEV;
1308
1309 strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1310
1311 return 0;
1312 }
1313
1314 static void adt7470_init_client(struct i2c_client *client)
1315 {
1316 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
1317
1318 if (reg < 0) {
1319 dev_err(&client->dev, "cannot read configuration register\n");
1320 } else {
1321 /* start monitoring (and do a self-test) */
1322 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
1323 }
1324 }
1325
1326 static int adt7470_probe(struct i2c_client *client,
1327 const struct i2c_device_id *id)
1328 {
1329 struct device *dev = &client->dev;
1330 struct adt7470_data *data;
1331 struct device *hwmon_dev;
1332
1333 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
1334 if (!data)
1335 return -ENOMEM;
1336
1337 data->num_temp_sensors = -1;
1338 data->auto_update_interval = AUTO_UPDATE_INTERVAL;
1339
1340 i2c_set_clientdata(client, data);
1341 data->client = client;
1342 mutex_init(&data->lock);
1343
1344 dev_info(&client->dev, "%s chip found\n", client->name);
1345
1346 /* Initialize the ADT7470 chip */
1347 adt7470_init_client(client);
1348
1349 /* Register sysfs hooks */
1350 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1351 data,
1352 adt7470_groups);
1353
1354 if (IS_ERR(hwmon_dev))
1355 return PTR_ERR(hwmon_dev);
1356
1357 data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
1358 dev_name(hwmon_dev));
1359 if (IS_ERR(data->auto_update)) {
1360 return PTR_ERR(data->auto_update);
1361 }
1362
1363 return 0;
1364 }
1365
1366 static int adt7470_remove(struct i2c_client *client)
1367 {
1368 struct adt7470_data *data = i2c_get_clientdata(client);
1369
1370 kthread_stop(data->auto_update);
1371 return 0;
1372 }
1373
1374 static const struct i2c_device_id adt7470_id[] = {
1375 { "adt7470", 0 },
1376 { }
1377 };
1378 MODULE_DEVICE_TABLE(i2c, adt7470_id);
1379
1380 static struct i2c_driver adt7470_driver = {
1381 .class = I2C_CLASS_HWMON,
1382 .driver = {
1383 .name = "adt7470",
1384 },
1385 .probe = adt7470_probe,
1386 .remove = adt7470_remove,
1387 .id_table = adt7470_id,
1388 .detect = adt7470_detect,
1389 .address_list = normal_i2c,
1390 };
1391
1392 module_i2c_driver(adt7470_driver);
1393
1394 MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1395 MODULE_DESCRIPTION("ADT7470 driver");
1396 MODULE_LICENSE("GPL");
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