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[mirror_ubuntu-bionic-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 auto_update_interval_show(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 auto_update_interval_store(struct device *dev,
415 struct device_attribute *devattr,
416 const char *buf, size_t count)
417 {
418 struct adt7470_data *data = dev_get_drvdata(dev);
419 long temp;
420
421 if (kstrtol(buf, 10, &temp))
422 return -EINVAL;
423
424 temp = clamp_val(temp, 0, 60000);
425
426 mutex_lock(&data->lock);
427 data->auto_update_interval = temp;
428 mutex_unlock(&data->lock);
429
430 return count;
431 }
432
433 static ssize_t num_temp_sensors_show(struct device *dev,
434 struct device_attribute *devattr,
435 char *buf)
436 {
437 struct adt7470_data *data = adt7470_update_device(dev);
438 return sprintf(buf, "%d\n", data->num_temp_sensors);
439 }
440
441 static ssize_t num_temp_sensors_store(struct device *dev,
442 struct device_attribute *devattr,
443 const char *buf, size_t count)
444 {
445 struct adt7470_data *data = dev_get_drvdata(dev);
446 long temp;
447
448 if (kstrtol(buf, 10, &temp))
449 return -EINVAL;
450
451 temp = clamp_val(temp, -1, 10);
452
453 mutex_lock(&data->lock);
454 data->num_temp_sensors = temp;
455 if (temp < 0)
456 data->temperatures_probed = 0;
457 mutex_unlock(&data->lock);
458
459 return count;
460 }
461
462 static ssize_t show_temp_min(struct device *dev,
463 struct device_attribute *devattr,
464 char *buf)
465 {
466 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
467 struct adt7470_data *data = adt7470_update_device(dev);
468 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
469 }
470
471 static ssize_t set_temp_min(struct device *dev,
472 struct device_attribute *devattr,
473 const char *buf,
474 size_t count)
475 {
476 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
477 struct adt7470_data *data = dev_get_drvdata(dev);
478 struct i2c_client *client = data->client;
479 long temp;
480
481 if (kstrtol(buf, 10, &temp))
482 return -EINVAL;
483
484 temp = clamp_val(temp, -128000, 127000);
485 temp = DIV_ROUND_CLOSEST(temp, 1000);
486
487 mutex_lock(&data->lock);
488 data->temp_min[attr->index] = temp;
489 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
490 temp);
491 mutex_unlock(&data->lock);
492
493 return count;
494 }
495
496 static ssize_t show_temp_max(struct device *dev,
497 struct device_attribute *devattr,
498 char *buf)
499 {
500 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
501 struct adt7470_data *data = adt7470_update_device(dev);
502 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
503 }
504
505 static ssize_t set_temp_max(struct device *dev,
506 struct device_attribute *devattr,
507 const char *buf,
508 size_t count)
509 {
510 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
511 struct adt7470_data *data = dev_get_drvdata(dev);
512 struct i2c_client *client = data->client;
513 long temp;
514
515 if (kstrtol(buf, 10, &temp))
516 return -EINVAL;
517
518 temp = clamp_val(temp, -128000, 127000);
519 temp = DIV_ROUND_CLOSEST(temp, 1000);
520
521 mutex_lock(&data->lock);
522 data->temp_max[attr->index] = temp;
523 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
524 temp);
525 mutex_unlock(&data->lock);
526
527 return count;
528 }
529
530 static ssize_t show_temp(struct device *dev, 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[attr->index]);
536 }
537
538 static ssize_t alarm_mask_show(struct device *dev,
539 struct device_attribute *devattr,
540 char *buf)
541 {
542 struct adt7470_data *data = adt7470_update_device(dev);
543
544 return sprintf(buf, "%x\n", data->alarms_mask);
545 }
546
547 static ssize_t alarm_mask_store(struct device *dev,
548 struct device_attribute *devattr,
549 const char *buf, size_t count)
550 {
551 struct adt7470_data *data = dev_get_drvdata(dev);
552 long mask;
553
554 if (kstrtoul(buf, 0, &mask))
555 return -EINVAL;
556
557 if (mask & ~0xffff)
558 return -EINVAL;
559
560 mutex_lock(&data->lock);
561 data->alarms_mask = mask;
562 adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask);
563 mutex_unlock(&data->lock);
564
565 return count;
566 }
567
568 static ssize_t show_fan_max(struct device *dev,
569 struct device_attribute *devattr,
570 char *buf)
571 {
572 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
573 struct adt7470_data *data = adt7470_update_device(dev);
574
575 if (FAN_DATA_VALID(data->fan_max[attr->index]))
576 return sprintf(buf, "%d\n",
577 FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
578 else
579 return sprintf(buf, "0\n");
580 }
581
582 static ssize_t set_fan_max(struct device *dev,
583 struct device_attribute *devattr,
584 const char *buf, size_t count)
585 {
586 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
587 struct adt7470_data *data = dev_get_drvdata(dev);
588 struct i2c_client *client = data->client;
589 long temp;
590
591 if (kstrtol(buf, 10, &temp) || !temp)
592 return -EINVAL;
593
594 temp = FAN_RPM_TO_PERIOD(temp);
595 temp = clamp_val(temp, 1, 65534);
596
597 mutex_lock(&data->lock);
598 data->fan_max[attr->index] = temp;
599 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
600 mutex_unlock(&data->lock);
601
602 return count;
603 }
604
605 static ssize_t show_fan_min(struct device *dev,
606 struct device_attribute *devattr,
607 char *buf)
608 {
609 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
610 struct adt7470_data *data = adt7470_update_device(dev);
611
612 if (FAN_DATA_VALID(data->fan_min[attr->index]))
613 return sprintf(buf, "%d\n",
614 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
615 else
616 return sprintf(buf, "0\n");
617 }
618
619 static ssize_t set_fan_min(struct device *dev,
620 struct device_attribute *devattr,
621 const char *buf, size_t count)
622 {
623 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
624 struct adt7470_data *data = dev_get_drvdata(dev);
625 struct i2c_client *client = data->client;
626 long temp;
627
628 if (kstrtol(buf, 10, &temp) || !temp)
629 return -EINVAL;
630
631 temp = FAN_RPM_TO_PERIOD(temp);
632 temp = clamp_val(temp, 1, 65534);
633
634 mutex_lock(&data->lock);
635 data->fan_min[attr->index] = temp;
636 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
637 mutex_unlock(&data->lock);
638
639 return count;
640 }
641
642 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
643 char *buf)
644 {
645 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
646 struct adt7470_data *data = adt7470_update_device(dev);
647
648 if (FAN_DATA_VALID(data->fan[attr->index]))
649 return sprintf(buf, "%d\n",
650 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
651 else
652 return sprintf(buf, "0\n");
653 }
654
655 static ssize_t show_force_pwm_max(struct device *dev,
656 struct device_attribute *devattr,
657 char *buf)
658 {
659 struct adt7470_data *data = adt7470_update_device(dev);
660 return sprintf(buf, "%d\n", data->force_pwm_max);
661 }
662
663 static ssize_t set_force_pwm_max(struct device *dev,
664 struct device_attribute *devattr,
665 const char *buf,
666 size_t count)
667 {
668 struct adt7470_data *data = dev_get_drvdata(dev);
669 struct i2c_client *client = data->client;
670 long temp;
671 u8 reg;
672
673 if (kstrtol(buf, 10, &temp))
674 return -EINVAL;
675
676 mutex_lock(&data->lock);
677 data->force_pwm_max = temp;
678 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
679 if (temp)
680 reg |= ADT7470_FSPD_MASK;
681 else
682 reg &= ~ADT7470_FSPD_MASK;
683 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
684 mutex_unlock(&data->lock);
685
686 return count;
687 }
688
689 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
690 char *buf)
691 {
692 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
693 struct adt7470_data *data = adt7470_update_device(dev);
694 return sprintf(buf, "%d\n", data->pwm[attr->index]);
695 }
696
697 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
698 const char *buf, size_t count)
699 {
700 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
701 struct adt7470_data *data = dev_get_drvdata(dev);
702 struct i2c_client *client = data->client;
703 long temp;
704
705 if (kstrtol(buf, 10, &temp))
706 return -EINVAL;
707
708 temp = clamp_val(temp, 0, 255);
709
710 mutex_lock(&data->lock);
711 data->pwm[attr->index] = temp;
712 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
713 mutex_unlock(&data->lock);
714
715 return count;
716 }
717
718 /* These are the valid PWM frequencies to the nearest Hz */
719 static const int adt7470_freq_map[] = {
720 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
721 };
722
723 static ssize_t pwm1_freq_show(struct device *dev,
724 struct device_attribute *devattr, char *buf)
725 {
726 struct adt7470_data *data = adt7470_update_device(dev);
727 unsigned char cfg_reg_1;
728 unsigned char cfg_reg_2;
729 int index;
730
731 mutex_lock(&data->lock);
732 cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
733 cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
734 mutex_unlock(&data->lock);
735
736 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
737 if (!(cfg_reg_1 & ADT7470_CFG_LF))
738 index += 8;
739 if (index >= ARRAY_SIZE(adt7470_freq_map))
740 index = ARRAY_SIZE(adt7470_freq_map) - 1;
741
742 return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
743 }
744
745 static ssize_t pwm1_freq_store(struct device *dev,
746 struct device_attribute *devattr,
747 const char *buf, size_t count)
748 {
749 struct adt7470_data *data = dev_get_drvdata(dev);
750 struct i2c_client *client = data->client;
751 long freq;
752 int index;
753 int low_freq = ADT7470_CFG_LF;
754 unsigned char val;
755
756 if (kstrtol(buf, 10, &freq))
757 return -EINVAL;
758
759 /* Round the user value given to the closest available frequency */
760 index = find_closest(freq, adt7470_freq_map,
761 ARRAY_SIZE(adt7470_freq_map));
762
763 if (index >= 8) {
764 index -= 8;
765 low_freq = 0;
766 }
767
768 mutex_lock(&data->lock);
769 /* Configuration Register 1 */
770 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
771 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
772 (val & ~ADT7470_CFG_LF) | low_freq);
773 /* Configuration Register 2 */
774 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
775 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
776 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
777 mutex_unlock(&data->lock);
778
779 return count;
780 }
781
782 static ssize_t show_pwm_max(struct device *dev,
783 struct device_attribute *devattr,
784 char *buf)
785 {
786 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
787 struct adt7470_data *data = adt7470_update_device(dev);
788 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
789 }
790
791 static ssize_t set_pwm_max(struct device *dev,
792 struct device_attribute *devattr,
793 const char *buf,
794 size_t count)
795 {
796 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
797 struct adt7470_data *data = dev_get_drvdata(dev);
798 struct i2c_client *client = data->client;
799 long temp;
800
801 if (kstrtol(buf, 10, &temp))
802 return -EINVAL;
803
804 temp = clamp_val(temp, 0, 255);
805
806 mutex_lock(&data->lock);
807 data->pwm_max[attr->index] = temp;
808 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
809 temp);
810 mutex_unlock(&data->lock);
811
812 return count;
813 }
814
815 static ssize_t show_pwm_min(struct device *dev,
816 struct device_attribute *devattr,
817 char *buf)
818 {
819 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
820 struct adt7470_data *data = adt7470_update_device(dev);
821 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
822 }
823
824 static ssize_t set_pwm_min(struct device *dev,
825 struct device_attribute *devattr,
826 const char *buf,
827 size_t count)
828 {
829 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
830 struct adt7470_data *data = dev_get_drvdata(dev);
831 struct i2c_client *client = data->client;
832 long temp;
833
834 if (kstrtol(buf, 10, &temp))
835 return -EINVAL;
836
837 temp = clamp_val(temp, 0, 255);
838
839 mutex_lock(&data->lock);
840 data->pwm_min[attr->index] = temp;
841 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
842 temp);
843 mutex_unlock(&data->lock);
844
845 return count;
846 }
847
848 static ssize_t show_pwm_tmax(struct device *dev,
849 struct device_attribute *devattr,
850 char *buf)
851 {
852 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
853 struct adt7470_data *data = adt7470_update_device(dev);
854 /* the datasheet says that tmax = tmin + 20C */
855 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
856 }
857
858 static ssize_t show_pwm_tmin(struct device *dev,
859 struct device_attribute *devattr,
860 char *buf)
861 {
862 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
863 struct adt7470_data *data = adt7470_update_device(dev);
864 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
865 }
866
867 static ssize_t set_pwm_tmin(struct device *dev,
868 struct device_attribute *devattr,
869 const char *buf,
870 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 struct i2c_client *client = data->client;
875 long temp;
876
877 if (kstrtol(buf, 10, &temp))
878 return -EINVAL;
879
880 temp = clamp_val(temp, -128000, 127000);
881 temp = DIV_ROUND_CLOSEST(temp, 1000);
882
883 mutex_lock(&data->lock);
884 data->pwm_tmin[attr->index] = temp;
885 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
886 temp);
887 mutex_unlock(&data->lock);
888
889 return count;
890 }
891
892 static ssize_t show_pwm_auto(struct device *dev,
893 struct device_attribute *devattr,
894 char *buf)
895 {
896 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
897 struct adt7470_data *data = adt7470_update_device(dev);
898 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
899 }
900
901 static ssize_t set_pwm_auto(struct device *dev,
902 struct device_attribute *devattr,
903 const char *buf,
904 size_t count)
905 {
906 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
907 struct adt7470_data *data = dev_get_drvdata(dev);
908 struct i2c_client *client = data->client;
909 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
910 int pwm_auto_reg_mask;
911 long temp;
912 u8 reg;
913
914 if (kstrtol(buf, 10, &temp))
915 return -EINVAL;
916
917 if (attr->index % 2)
918 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
919 else
920 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
921
922 if (temp != 2 && temp != 1)
923 return -EINVAL;
924 temp--;
925
926 mutex_lock(&data->lock);
927 data->pwm_automatic[attr->index] = temp;
928 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
929 if (temp)
930 reg |= pwm_auto_reg_mask;
931 else
932 reg &= ~pwm_auto_reg_mask;
933 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
934 mutex_unlock(&data->lock);
935
936 return count;
937 }
938
939 static ssize_t show_pwm_auto_temp(struct device *dev,
940 struct device_attribute *devattr,
941 char *buf)
942 {
943 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
944 struct adt7470_data *data = adt7470_update_device(dev);
945 u8 ctrl = data->pwm_auto_temp[attr->index];
946
947 if (ctrl)
948 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
949 else
950 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
951 }
952
953 static int cvt_auto_temp(int input)
954 {
955 if (input == ADT7470_PWM_ALL_TEMPS)
956 return 0;
957 if (input < 1 || !is_power_of_2(input))
958 return -EINVAL;
959 return ilog2(input) + 1;
960 }
961
962 static ssize_t set_pwm_auto_temp(struct device *dev,
963 struct device_attribute *devattr,
964 const char *buf,
965 size_t count)
966 {
967 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
968 struct adt7470_data *data = dev_get_drvdata(dev);
969 struct i2c_client *client = data->client;
970 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
971 long temp;
972 u8 reg;
973
974 if (kstrtol(buf, 10, &temp))
975 return -EINVAL;
976
977 temp = cvt_auto_temp(temp);
978 if (temp < 0)
979 return temp;
980
981 mutex_lock(&data->lock);
982 data->pwm_automatic[attr->index] = temp;
983 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
984
985 if (!(attr->index % 2)) {
986 reg &= 0xF;
987 reg |= (temp << 4) & 0xF0;
988 } else {
989 reg &= 0xF0;
990 reg |= temp & 0xF;
991 }
992
993 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
994 mutex_unlock(&data->lock);
995
996 return count;
997 }
998
999 static ssize_t show_alarm(struct device *dev,
1000 struct device_attribute *devattr,
1001 char *buf)
1002 {
1003 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1004 struct adt7470_data *data = adt7470_update_device(dev);
1005
1006 if (data->alarm & attr->index)
1007 return sprintf(buf, "1\n");
1008 else
1009 return sprintf(buf, "0\n");
1010 }
1011
1012 static DEVICE_ATTR_RW(alarm_mask);
1013 static DEVICE_ATTR_RW(num_temp_sensors);
1014 static DEVICE_ATTR_RW(auto_update_interval);
1015
1016 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
1017 set_temp_max, 0);
1018 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
1019 set_temp_max, 1);
1020 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
1021 set_temp_max, 2);
1022 static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max,
1023 set_temp_max, 3);
1024 static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max,
1025 set_temp_max, 4);
1026 static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max,
1027 set_temp_max, 5);
1028 static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max,
1029 set_temp_max, 6);
1030 static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max,
1031 set_temp_max, 7);
1032 static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max,
1033 set_temp_max, 8);
1034 static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max,
1035 set_temp_max, 9);
1036
1037 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
1038 set_temp_min, 0);
1039 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
1040 set_temp_min, 1);
1041 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
1042 set_temp_min, 2);
1043 static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min,
1044 set_temp_min, 3);
1045 static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min,
1046 set_temp_min, 4);
1047 static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min,
1048 set_temp_min, 5);
1049 static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min,
1050 set_temp_min, 6);
1051 static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min,
1052 set_temp_min, 7);
1053 static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min,
1054 set_temp_min, 8);
1055 static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min,
1056 set_temp_min, 9);
1057
1058 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
1059 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
1060 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
1061 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
1062 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
1063 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
1064 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
1065 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
1066 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8);
1067 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9);
1068
1069 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
1070 ADT7470_R1T_ALARM);
1071 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
1072 ADT7470_R2T_ALARM);
1073 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
1074 ADT7470_R3T_ALARM);
1075 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL,
1076 ADT7470_R4T_ALARM);
1077 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL,
1078 ADT7470_R5T_ALARM);
1079 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL,
1080 ADT7470_R6T_ALARM);
1081 static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL,
1082 ADT7470_R7T_ALARM);
1083 static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL,
1084 ALARM2(ADT7470_R8T_ALARM));
1085 static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL,
1086 ALARM2(ADT7470_R9T_ALARM));
1087 static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL,
1088 ALARM2(ADT7470_R10T_ALARM));
1089
1090 static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
1091 set_fan_max, 0);
1092 static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
1093 set_fan_max, 1);
1094 static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
1095 set_fan_max, 2);
1096 static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max,
1097 set_fan_max, 3);
1098
1099 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
1100 set_fan_min, 0);
1101 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
1102 set_fan_min, 1);
1103 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
1104 set_fan_min, 2);
1105 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
1106 set_fan_min, 3);
1107
1108 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
1109 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
1110 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
1111 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
1112
1113 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
1114 ALARM2(ADT7470_FAN1_ALARM));
1115 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
1116 ALARM2(ADT7470_FAN2_ALARM));
1117 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
1118 ALARM2(ADT7470_FAN3_ALARM));
1119 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
1120 ALARM2(ADT7470_FAN4_ALARM));
1121
1122 static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO,
1123 show_force_pwm_max, set_force_pwm_max, 0);
1124
1125 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
1126 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
1127 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
1128 static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
1129
1130 static DEVICE_ATTR_RW(pwm1_freq);
1131
1132 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
1133 show_pwm_min, set_pwm_min, 0);
1134 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
1135 show_pwm_min, set_pwm_min, 1);
1136 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
1137 show_pwm_min, set_pwm_min, 2);
1138 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO,
1139 show_pwm_min, set_pwm_min, 3);
1140
1141 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
1142 show_pwm_max, set_pwm_max, 0);
1143 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
1144 show_pwm_max, set_pwm_max, 1);
1145 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
1146 show_pwm_max, set_pwm_max, 2);
1147 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO,
1148 show_pwm_max, set_pwm_max, 3);
1149
1150 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
1151 show_pwm_tmin, set_pwm_tmin, 0);
1152 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO,
1153 show_pwm_tmin, set_pwm_tmin, 1);
1154 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO,
1155 show_pwm_tmin, set_pwm_tmin, 2);
1156 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO,
1157 show_pwm_tmin, set_pwm_tmin, 3);
1158
1159 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1160 NULL, 0);
1161 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1162 NULL, 1);
1163 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1164 NULL, 2);
1165 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax,
1166 NULL, 3);
1167
1168 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1169 set_pwm_auto, 0);
1170 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1171 set_pwm_auto, 1);
1172 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1173 set_pwm_auto, 2);
1174 static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
1175 set_pwm_auto, 3);
1176
1177 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
1178 show_pwm_auto_temp, set_pwm_auto_temp, 0);
1179 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
1180 show_pwm_auto_temp, set_pwm_auto_temp, 1);
1181 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
1182 show_pwm_auto_temp, set_pwm_auto_temp, 2);
1183 static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
1184 show_pwm_auto_temp, set_pwm_auto_temp, 3);
1185
1186 static struct attribute *adt7470_attrs[] = {
1187 &dev_attr_alarm_mask.attr,
1188 &dev_attr_num_temp_sensors.attr,
1189 &dev_attr_auto_update_interval.attr,
1190 &sensor_dev_attr_temp1_max.dev_attr.attr,
1191 &sensor_dev_attr_temp2_max.dev_attr.attr,
1192 &sensor_dev_attr_temp3_max.dev_attr.attr,
1193 &sensor_dev_attr_temp4_max.dev_attr.attr,
1194 &sensor_dev_attr_temp5_max.dev_attr.attr,
1195 &sensor_dev_attr_temp6_max.dev_attr.attr,
1196 &sensor_dev_attr_temp7_max.dev_attr.attr,
1197 &sensor_dev_attr_temp8_max.dev_attr.attr,
1198 &sensor_dev_attr_temp9_max.dev_attr.attr,
1199 &sensor_dev_attr_temp10_max.dev_attr.attr,
1200 &sensor_dev_attr_temp1_min.dev_attr.attr,
1201 &sensor_dev_attr_temp2_min.dev_attr.attr,
1202 &sensor_dev_attr_temp3_min.dev_attr.attr,
1203 &sensor_dev_attr_temp4_min.dev_attr.attr,
1204 &sensor_dev_attr_temp5_min.dev_attr.attr,
1205 &sensor_dev_attr_temp6_min.dev_attr.attr,
1206 &sensor_dev_attr_temp7_min.dev_attr.attr,
1207 &sensor_dev_attr_temp8_min.dev_attr.attr,
1208 &sensor_dev_attr_temp9_min.dev_attr.attr,
1209 &sensor_dev_attr_temp10_min.dev_attr.attr,
1210 &sensor_dev_attr_temp1_input.dev_attr.attr,
1211 &sensor_dev_attr_temp2_input.dev_attr.attr,
1212 &sensor_dev_attr_temp3_input.dev_attr.attr,
1213 &sensor_dev_attr_temp4_input.dev_attr.attr,
1214 &sensor_dev_attr_temp5_input.dev_attr.attr,
1215 &sensor_dev_attr_temp6_input.dev_attr.attr,
1216 &sensor_dev_attr_temp7_input.dev_attr.attr,
1217 &sensor_dev_attr_temp8_input.dev_attr.attr,
1218 &sensor_dev_attr_temp9_input.dev_attr.attr,
1219 &sensor_dev_attr_temp10_input.dev_attr.attr,
1220 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1221 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1222 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1223 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
1224 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
1225 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
1226 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
1227 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
1228 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
1229 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
1230 &sensor_dev_attr_fan1_max.dev_attr.attr,
1231 &sensor_dev_attr_fan2_max.dev_attr.attr,
1232 &sensor_dev_attr_fan3_max.dev_attr.attr,
1233 &sensor_dev_attr_fan4_max.dev_attr.attr,
1234 &sensor_dev_attr_fan1_min.dev_attr.attr,
1235 &sensor_dev_attr_fan2_min.dev_attr.attr,
1236 &sensor_dev_attr_fan3_min.dev_attr.attr,
1237 &sensor_dev_attr_fan4_min.dev_attr.attr,
1238 &sensor_dev_attr_fan1_input.dev_attr.attr,
1239 &sensor_dev_attr_fan2_input.dev_attr.attr,
1240 &sensor_dev_attr_fan3_input.dev_attr.attr,
1241 &sensor_dev_attr_fan4_input.dev_attr.attr,
1242 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1243 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1244 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1245 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1246 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1247 &sensor_dev_attr_pwm1.dev_attr.attr,
1248 &dev_attr_pwm1_freq.attr,
1249 &sensor_dev_attr_pwm2.dev_attr.attr,
1250 &sensor_dev_attr_pwm3.dev_attr.attr,
1251 &sensor_dev_attr_pwm4.dev_attr.attr,
1252 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1253 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1254 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1255 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1256 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1257 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1258 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1259 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1260 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1261 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1262 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1263 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1264 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1265 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1266 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1267 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1268 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1269 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1270 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1271 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1272 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1273 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1274 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1275 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1276 NULL
1277 };
1278
1279 ATTRIBUTE_GROUPS(adt7470);
1280
1281 /* Return 0 if detection is successful, -ENODEV otherwise */
1282 static int adt7470_detect(struct i2c_client *client,
1283 struct i2c_board_info *info)
1284 {
1285 struct i2c_adapter *adapter = client->adapter;
1286 int vendor, device, revision;
1287
1288 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1289 return -ENODEV;
1290
1291 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1292 if (vendor != ADT7470_VENDOR)
1293 return -ENODEV;
1294
1295 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1296 if (device != ADT7470_DEVICE)
1297 return -ENODEV;
1298
1299 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
1300 if (revision != ADT7470_REVISION)
1301 return -ENODEV;
1302
1303 strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1304
1305 return 0;
1306 }
1307
1308 static void adt7470_init_client(struct i2c_client *client)
1309 {
1310 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
1311
1312 if (reg < 0) {
1313 dev_err(&client->dev, "cannot read configuration register\n");
1314 } else {
1315 /* start monitoring (and do a self-test) */
1316 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
1317 }
1318 }
1319
1320 static int adt7470_probe(struct i2c_client *client,
1321 const struct i2c_device_id *id)
1322 {
1323 struct device *dev = &client->dev;
1324 struct adt7470_data *data;
1325 struct device *hwmon_dev;
1326
1327 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
1328 if (!data)
1329 return -ENOMEM;
1330
1331 data->num_temp_sensors = -1;
1332 data->auto_update_interval = AUTO_UPDATE_INTERVAL;
1333
1334 i2c_set_clientdata(client, data);
1335 data->client = client;
1336 mutex_init(&data->lock);
1337
1338 dev_info(&client->dev, "%s chip found\n", client->name);
1339
1340 /* Initialize the ADT7470 chip */
1341 adt7470_init_client(client);
1342
1343 /* Register sysfs hooks */
1344 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1345 data,
1346 adt7470_groups);
1347
1348 if (IS_ERR(hwmon_dev))
1349 return PTR_ERR(hwmon_dev);
1350
1351 data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
1352 dev_name(hwmon_dev));
1353 if (IS_ERR(data->auto_update)) {
1354 return PTR_ERR(data->auto_update);
1355 }
1356
1357 return 0;
1358 }
1359
1360 static int adt7470_remove(struct i2c_client *client)
1361 {
1362 struct adt7470_data *data = i2c_get_clientdata(client);
1363
1364 kthread_stop(data->auto_update);
1365 return 0;
1366 }
1367
1368 static const struct i2c_device_id adt7470_id[] = {
1369 { "adt7470", 0 },
1370 { }
1371 };
1372 MODULE_DEVICE_TABLE(i2c, adt7470_id);
1373
1374 static struct i2c_driver adt7470_driver = {
1375 .class = I2C_CLASS_HWMON,
1376 .driver = {
1377 .name = "adt7470",
1378 },
1379 .probe = adt7470_probe,
1380 .remove = adt7470_remove,
1381 .id_table = adt7470_id,
1382 .detect = adt7470_detect,
1383 .address_list = normal_i2c,
1384 };
1385
1386 module_i2c_driver(adt7470_driver);
1387
1388 MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1389 MODULE_DESCRIPTION("ADT7470 driver");
1390 MODULE_LICENSE("GPL");
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