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[mirror_ubuntu-jammy-kernel.git] / drivers / hwmon / adt7470.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * A hwmon driver for the Analog Devices ADT7470
4 * Copyright (C) 2007 IBM
5 *
6 * Author: Darrick J. Wong <darrick.wong@oracle.com>
7 */
8
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
11 #include <linux/module.h>
12 #include <linux/jiffies.h>
13 #include <linux/i2c.h>
14 #include <linux/hwmon.h>
15 #include <linux/hwmon-sysfs.h>
16 #include <linux/err.h>
17 #include <linux/mutex.h>
18 #include <linux/delay.h>
19 #include <linux/log2.h>
20 #include <linux/kthread.h>
21 #include <linux/slab.h>
22 #include <linux/util_macros.h>
23
24 /* Addresses to scan */
25 static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
26
27 /* ADT7470 registers */
28 #define ADT7470_REG_BASE_ADDR 0x20
29 #define ADT7470_REG_TEMP_BASE_ADDR 0x20
30 #define ADT7470_REG_TEMP_MAX_ADDR 0x29
31 #define ADT7470_REG_FAN_BASE_ADDR 0x2A
32 #define ADT7470_REG_FAN_MAX_ADDR 0x31
33 #define ADT7470_REG_PWM_BASE_ADDR 0x32
34 #define ADT7470_REG_PWM_MAX_ADDR 0x35
35 #define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
36 #define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
37 #define ADT7470_REG_CFG 0x40
38 #define ADT7470_FSPD_MASK 0x04
39 #define ADT7470_REG_ALARM1 0x41
40 #define ADT7470_R1T_ALARM 0x01
41 #define ADT7470_R2T_ALARM 0x02
42 #define ADT7470_R3T_ALARM 0x04
43 #define ADT7470_R4T_ALARM 0x08
44 #define ADT7470_R5T_ALARM 0x10
45 #define ADT7470_R6T_ALARM 0x20
46 #define ADT7470_R7T_ALARM 0x40
47 #define ADT7470_OOL_ALARM 0x80
48 #define ADT7470_REG_ALARM2 0x42
49 #define ADT7470_R8T_ALARM 0x01
50 #define ADT7470_R9T_ALARM 0x02
51 #define ADT7470_R10T_ALARM 0x04
52 #define ADT7470_FAN1_ALARM 0x10
53 #define ADT7470_FAN2_ALARM 0x20
54 #define ADT7470_FAN3_ALARM 0x40
55 #define ADT7470_FAN4_ALARM 0x80
56 #define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
57 #define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
58 #define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
59 #define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
60 #define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
61 #define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
62 #define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
63 #define ADT7470_REG_PWM12_CFG 0x68
64 #define ADT7470_PWM2_AUTO_MASK 0x40
65 #define ADT7470_PWM1_AUTO_MASK 0x80
66 #define ADT7470_PWM_AUTO_MASK 0xC0
67 #define ADT7470_REG_PWM34_CFG 0x69
68 #define ADT7470_PWM3_AUTO_MASK 0x40
69 #define ADT7470_PWM4_AUTO_MASK 0x80
70 #define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
71 #define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
72 #define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
73 #define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
74 #define ADT7470_REG_CFG_2 0x74
75 #define ADT7470_REG_ACOUSTICS12 0x75
76 #define ADT7470_REG_ACOUSTICS34 0x76
77 #define ADT7470_REG_DEVICE 0x3D
78 #define ADT7470_REG_VENDOR 0x3E
79 #define ADT7470_REG_REVISION 0x3F
80 #define ADT7470_REG_ALARM1_MASK 0x72
81 #define ADT7470_REG_ALARM2_MASK 0x73
82 #define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
83 #define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
84 #define ADT7470_REG_MAX_ADDR 0x81
85
86 #define ADT7470_TEMP_COUNT 10
87 #define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
88 #define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
89 #define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
90 ((x) * 2) + 1)
91
92 #define ADT7470_FAN_COUNT 4
93 #define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
94 #define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
95 #define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
96
97 #define ADT7470_PWM_COUNT 4
98 #define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
99 #define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
100 #define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
101 #define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
102 #define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
103 #define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
104 ((x) / 2))
105
106 #define ALARM2(x) ((x) << 8)
107
108 #define ADT7470_VENDOR 0x41
109 #define ADT7470_DEVICE 0x70
110 /* datasheet only mentions a revision 2 */
111 #define ADT7470_REVISION 0x02
112
113 /* "all temps" according to hwmon sysfs interface spec */
114 #define ADT7470_PWM_ALL_TEMPS 0x3FF
115
116 /* How often do we reread sensors values? (In jiffies) */
117 #define SENSOR_REFRESH_INTERVAL (5 * HZ)
118
119 /* How often do we reread sensor limit values? (In jiffies) */
120 #define LIMIT_REFRESH_INTERVAL (60 * HZ)
121
122 /* Wait at least 200ms per sensor for 10 sensors */
123 #define TEMP_COLLECTION_TIME 2000
124
125 /* auto update thing won't fire more than every 2s */
126 #define AUTO_UPDATE_INTERVAL 2000
127
128 /* datasheet says to divide this number by the fan reading to get fan rpm */
129 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
130 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
131 #define FAN_PERIOD_INVALID 65535
132 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
133
134 /* Config registers 1 and 2 include fields for selecting the PWM frequency */
135 #define ADT7470_CFG_LF 0x40
136 #define ADT7470_FREQ_MASK 0x70
137 #define ADT7470_FREQ_SHIFT 4
138
139 struct adt7470_data {
140 struct i2c_client *client;
141 struct mutex lock;
142 char sensors_valid;
143 char limits_valid;
144 unsigned long sensors_last_updated; /* In jiffies */
145 unsigned long limits_last_updated; /* In jiffies */
146
147 int num_temp_sensors; /* -1 = probe */
148 int temperatures_probed;
149
150 s8 temp[ADT7470_TEMP_COUNT];
151 s8 temp_min[ADT7470_TEMP_COUNT];
152 s8 temp_max[ADT7470_TEMP_COUNT];
153 u16 fan[ADT7470_FAN_COUNT];
154 u16 fan_min[ADT7470_FAN_COUNT];
155 u16 fan_max[ADT7470_FAN_COUNT];
156 u16 alarm;
157 u16 alarms_mask;
158 u8 force_pwm_max;
159 u8 pwm[ADT7470_PWM_COUNT];
160 u8 pwm_max[ADT7470_PWM_COUNT];
161 u8 pwm_automatic[ADT7470_PWM_COUNT];
162 u8 pwm_min[ADT7470_PWM_COUNT];
163 s8 pwm_tmin[ADT7470_PWM_COUNT];
164 u8 pwm_auto_temp[ADT7470_PWM_COUNT];
165
166 struct task_struct *auto_update;
167 unsigned int auto_update_interval;
168 };
169
170 /*
171 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says
172 * that the low byte must be read before the high byte.
173 */
174 static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
175 {
176 u16 foo;
177 foo = i2c_smbus_read_byte_data(client, reg);
178 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
179 return foo;
180 }
181
182 static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
183 u16 value)
184 {
185 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
186 || i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
187 }
188
189 /* Probe for temperature sensors. Assumes lock is held */
190 static int adt7470_read_temperatures(struct i2c_client *client,
191 struct adt7470_data *data)
192 {
193 unsigned long res;
194 int i;
195 u8 cfg, pwm[4], pwm_cfg[2];
196
197 /* save pwm[1-4] config register */
198 pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
199 pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
200
201 /* set manual pwm to whatever it is set to now */
202 for (i = 0; i < ADT7470_FAN_COUNT; i++)
203 pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
204
205 /* put pwm in manual mode */
206 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
207 pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
208 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
209 pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
210
211 /* write pwm control to whatever it was */
212 for (i = 0; i < ADT7470_FAN_COUNT; i++)
213 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
214
215 /* start reading temperature sensors */
216 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
217 cfg |= 0x80;
218 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
219
220 /* Delay is 200ms * number of temp sensors. */
221 res = msleep_interruptible((data->num_temp_sensors >= 0 ?
222 data->num_temp_sensors * 200 :
223 TEMP_COLLECTION_TIME));
224
225 /* done reading temperature sensors */
226 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
227 cfg &= ~0x80;
228 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
229
230 /* restore pwm[1-4] config registers */
231 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
232 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
233
234 if (res) {
235 pr_err("ha ha, interrupted\n");
236 return -EAGAIN;
237 }
238
239 /* Only count fans if we have to */
240 if (data->num_temp_sensors >= 0)
241 return 0;
242
243 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
244 data->temp[i] = i2c_smbus_read_byte_data(client,
245 ADT7470_TEMP_REG(i));
246 if (data->temp[i])
247 data->num_temp_sensors = i + 1;
248 }
249 data->temperatures_probed = 1;
250 return 0;
251 }
252
253 static int adt7470_update_thread(void *p)
254 {
255 struct i2c_client *client = p;
256 struct adt7470_data *data = i2c_get_clientdata(client);
257
258 while (!kthread_should_stop()) {
259 mutex_lock(&data->lock);
260 adt7470_read_temperatures(client, data);
261 mutex_unlock(&data->lock);
262
263 set_current_state(TASK_INTERRUPTIBLE);
264 if (kthread_should_stop())
265 break;
266
267 schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
268 }
269
270 return 0;
271 }
272
273 static int adt7470_update_sensors(struct adt7470_data *data)
274 {
275 struct i2c_client *client = data->client;
276 u8 cfg;
277 int i;
278
279 if (!data->temperatures_probed)
280 adt7470_read_temperatures(client, data);
281 else
282 for (i = 0; i < ADT7470_TEMP_COUNT; i++)
283 data->temp[i] = i2c_smbus_read_byte_data(client,
284 ADT7470_TEMP_REG(i));
285
286 for (i = 0; i < ADT7470_FAN_COUNT; i++)
287 data->fan[i] = adt7470_read_word_data(client,
288 ADT7470_REG_FAN(i));
289
290 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
291 int reg;
292 int reg_mask;
293
294 data->pwm[i] = i2c_smbus_read_byte_data(client,
295 ADT7470_REG_PWM(i));
296
297 if (i % 2)
298 reg_mask = ADT7470_PWM2_AUTO_MASK;
299 else
300 reg_mask = ADT7470_PWM1_AUTO_MASK;
301
302 reg = ADT7470_REG_PWM_CFG(i);
303 if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
304 data->pwm_automatic[i] = 1;
305 else
306 data->pwm_automatic[i] = 0;
307
308 reg = ADT7470_REG_PWM_AUTO_TEMP(i);
309 cfg = i2c_smbus_read_byte_data(client, reg);
310 if (!(i % 2))
311 data->pwm_auto_temp[i] = cfg >> 4;
312 else
313 data->pwm_auto_temp[i] = cfg & 0xF;
314 }
315
316 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
317 ADT7470_FSPD_MASK)
318 data->force_pwm_max = 1;
319 else
320 data->force_pwm_max = 0;
321
322 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
323 if (data->alarm & ADT7470_OOL_ALARM)
324 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
325 ADT7470_REG_ALARM2));
326 data->alarms_mask = adt7470_read_word_data(client,
327 ADT7470_REG_ALARM1_MASK);
328
329 return 0;
330 }
331
332 static int adt7470_update_limits(struct adt7470_data *data)
333 {
334 struct i2c_client *client = data->client;
335 int i;
336
337 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
338 data->temp_min[i] = i2c_smbus_read_byte_data(client,
339 ADT7470_TEMP_MIN_REG(i));
340 data->temp_max[i] = i2c_smbus_read_byte_data(client,
341 ADT7470_TEMP_MAX_REG(i));
342 }
343
344 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
345 data->fan_min[i] = adt7470_read_word_data(client,
346 ADT7470_REG_FAN_MIN(i));
347 data->fan_max[i] = adt7470_read_word_data(client,
348 ADT7470_REG_FAN_MAX(i));
349 }
350
351 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
352 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
353 ADT7470_REG_PWM_MAX(i));
354 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
355 ADT7470_REG_PWM_MIN(i));
356 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
357 ADT7470_REG_PWM_TMIN(i));
358 }
359
360 return 0;
361 }
362
363 static struct adt7470_data *adt7470_update_device(struct device *dev)
364 {
365 struct adt7470_data *data = dev_get_drvdata(dev);
366 unsigned long local_jiffies = jiffies;
367 int need_sensors = 1;
368 int need_limits = 1;
369 int err;
370
371 /*
372 * Figure out if we need to update the shadow registers.
373 * Lockless means that we may occasionally report out of
374 * date data.
375 */
376 if (time_before(local_jiffies, data->sensors_last_updated +
377 SENSOR_REFRESH_INTERVAL) &&
378 data->sensors_valid)
379 need_sensors = 0;
380
381 if (time_before(local_jiffies, data->limits_last_updated +
382 LIMIT_REFRESH_INTERVAL) &&
383 data->limits_valid)
384 need_limits = 0;
385
386 if (!need_sensors && !need_limits)
387 return data;
388
389 mutex_lock(&data->lock);
390 if (need_sensors) {
391 err = adt7470_update_sensors(data);
392 if (err < 0)
393 goto out;
394 data->sensors_last_updated = local_jiffies;
395 data->sensors_valid = 1;
396 }
397
398 if (need_limits) {
399 err = adt7470_update_limits(data);
400 if (err < 0)
401 goto out;
402 data->limits_last_updated = local_jiffies;
403 data->limits_valid = 1;
404 }
405 out:
406 mutex_unlock(&data->lock);
407
408 return err < 0 ? ERR_PTR(err) : data;
409 }
410
411 static ssize_t auto_update_interval_show(struct device *dev,
412 struct device_attribute *devattr,
413 char *buf)
414 {
415 struct adt7470_data *data = adt7470_update_device(dev);
416
417 if (IS_ERR(data))
418 return PTR_ERR(data);
419
420 return sprintf(buf, "%d\n", data->auto_update_interval);
421 }
422
423 static ssize_t auto_update_interval_store(struct device *dev,
424 struct device_attribute *devattr,
425 const char *buf, size_t count)
426 {
427 struct adt7470_data *data = dev_get_drvdata(dev);
428 long temp;
429
430 if (kstrtol(buf, 10, &temp))
431 return -EINVAL;
432
433 temp = clamp_val(temp, 0, 60000);
434
435 mutex_lock(&data->lock);
436 data->auto_update_interval = temp;
437 mutex_unlock(&data->lock);
438
439 return count;
440 }
441
442 static ssize_t num_temp_sensors_show(struct device *dev,
443 struct device_attribute *devattr,
444 char *buf)
445 {
446 struct adt7470_data *data = adt7470_update_device(dev);
447
448 if (IS_ERR(data))
449 return PTR_ERR(data);
450
451 return sprintf(buf, "%d\n", data->num_temp_sensors);
452 }
453
454 static ssize_t num_temp_sensors_store(struct device *dev,
455 struct device_attribute *devattr,
456 const char *buf, size_t count)
457 {
458 struct adt7470_data *data = dev_get_drvdata(dev);
459 long temp;
460
461 if (kstrtol(buf, 10, &temp))
462 return -EINVAL;
463
464 temp = clamp_val(temp, -1, 10);
465
466 mutex_lock(&data->lock);
467 data->num_temp_sensors = temp;
468 if (temp < 0)
469 data->temperatures_probed = 0;
470 mutex_unlock(&data->lock);
471
472 return count;
473 }
474
475 static ssize_t temp_min_show(struct device *dev,
476 struct device_attribute *devattr, char *buf)
477 {
478 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
479 struct adt7470_data *data = adt7470_update_device(dev);
480
481 if (IS_ERR(data))
482 return PTR_ERR(data);
483
484 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
485 }
486
487 static ssize_t temp_min_store(struct device *dev,
488 struct device_attribute *devattr,
489 const char *buf, size_t count)
490 {
491 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
492 struct adt7470_data *data = dev_get_drvdata(dev);
493 struct i2c_client *client = data->client;
494 long temp;
495
496 if (kstrtol(buf, 10, &temp))
497 return -EINVAL;
498
499 temp = clamp_val(temp, -128000, 127000);
500 temp = DIV_ROUND_CLOSEST(temp, 1000);
501
502 mutex_lock(&data->lock);
503 data->temp_min[attr->index] = temp;
504 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
505 temp);
506 mutex_unlock(&data->lock);
507
508 return count;
509 }
510
511 static ssize_t temp_max_show(struct device *dev,
512 struct device_attribute *devattr, char *buf)
513 {
514 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
515 struct adt7470_data *data = adt7470_update_device(dev);
516
517 if (IS_ERR(data))
518 return PTR_ERR(data);
519
520 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
521 }
522
523 static ssize_t temp_max_store(struct device *dev,
524 struct device_attribute *devattr,
525 const char *buf, size_t count)
526 {
527 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
528 struct adt7470_data *data = dev_get_drvdata(dev);
529 struct i2c_client *client = data->client;
530 long temp;
531
532 if (kstrtol(buf, 10, &temp))
533 return -EINVAL;
534
535 temp = clamp_val(temp, -128000, 127000);
536 temp = DIV_ROUND_CLOSEST(temp, 1000);
537
538 mutex_lock(&data->lock);
539 data->temp_max[attr->index] = temp;
540 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
541 temp);
542 mutex_unlock(&data->lock);
543
544 return count;
545 }
546
547 static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
548 char *buf)
549 {
550 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
551 struct adt7470_data *data = adt7470_update_device(dev);
552
553 if (IS_ERR(data))
554 return PTR_ERR(data);
555
556 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
557 }
558
559 static ssize_t alarm_mask_show(struct device *dev,
560 struct device_attribute *devattr,
561 char *buf)
562 {
563 struct adt7470_data *data = adt7470_update_device(dev);
564
565 if (IS_ERR(data))
566 return PTR_ERR(data);
567
568 return sprintf(buf, "%x\n", data->alarms_mask);
569 }
570
571 static ssize_t alarm_mask_store(struct device *dev,
572 struct device_attribute *devattr,
573 const char *buf, size_t count)
574 {
575 struct adt7470_data *data = dev_get_drvdata(dev);
576 long mask;
577
578 if (kstrtoul(buf, 0, &mask))
579 return -EINVAL;
580
581 if (mask & ~0xffff)
582 return -EINVAL;
583
584 mutex_lock(&data->lock);
585 data->alarms_mask = mask;
586 adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask);
587 mutex_unlock(&data->lock);
588
589 return count;
590 }
591
592 static ssize_t fan_max_show(struct device *dev,
593 struct device_attribute *devattr, char *buf)
594 {
595 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
596 struct adt7470_data *data = adt7470_update_device(dev);
597
598 if (IS_ERR(data))
599 return PTR_ERR(data);
600
601 if (FAN_DATA_VALID(data->fan_max[attr->index]))
602 return sprintf(buf, "%d\n",
603 FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
604 else
605 return sprintf(buf, "0\n");
606 }
607
608 static ssize_t fan_max_store(struct device *dev,
609 struct device_attribute *devattr,
610 const char *buf, size_t count)
611 {
612 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
613 struct adt7470_data *data = dev_get_drvdata(dev);
614 struct i2c_client *client = data->client;
615 long temp;
616
617 if (kstrtol(buf, 10, &temp) || !temp)
618 return -EINVAL;
619
620 temp = FAN_RPM_TO_PERIOD(temp);
621 temp = clamp_val(temp, 1, 65534);
622
623 mutex_lock(&data->lock);
624 data->fan_max[attr->index] = temp;
625 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
626 mutex_unlock(&data->lock);
627
628 return count;
629 }
630
631 static ssize_t fan_min_show(struct device *dev,
632 struct device_attribute *devattr, char *buf)
633 {
634 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
635 struct adt7470_data *data = adt7470_update_device(dev);
636
637 if (IS_ERR(data))
638 return PTR_ERR(data);
639
640 if (FAN_DATA_VALID(data->fan_min[attr->index]))
641 return sprintf(buf, "%d\n",
642 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
643 else
644 return sprintf(buf, "0\n");
645 }
646
647 static ssize_t fan_min_store(struct device *dev,
648 struct device_attribute *devattr,
649 const char *buf, size_t count)
650 {
651 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
652 struct adt7470_data *data = dev_get_drvdata(dev);
653 struct i2c_client *client = data->client;
654 long temp;
655
656 if (kstrtol(buf, 10, &temp) || !temp)
657 return -EINVAL;
658
659 temp = FAN_RPM_TO_PERIOD(temp);
660 temp = clamp_val(temp, 1, 65534);
661
662 mutex_lock(&data->lock);
663 data->fan_min[attr->index] = temp;
664 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
665 mutex_unlock(&data->lock);
666
667 return count;
668 }
669
670 static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
671 char *buf)
672 {
673 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
674 struct adt7470_data *data = adt7470_update_device(dev);
675
676 if (IS_ERR(data))
677 return PTR_ERR(data);
678
679 if (FAN_DATA_VALID(data->fan[attr->index]))
680 return sprintf(buf, "%d\n",
681 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
682 else
683 return sprintf(buf, "0\n");
684 }
685
686 static ssize_t force_pwm_max_show(struct device *dev,
687 struct device_attribute *devattr, char *buf)
688 {
689 struct adt7470_data *data = adt7470_update_device(dev);
690
691 if (IS_ERR(data))
692 return PTR_ERR(data);
693
694 return sprintf(buf, "%d\n", data->force_pwm_max);
695 }
696
697 static ssize_t force_pwm_max_store(struct device *dev,
698 struct device_attribute *devattr,
699 const char *buf, size_t count)
700 {
701 struct adt7470_data *data = dev_get_drvdata(dev);
702 struct i2c_client *client = data->client;
703 long temp;
704 u8 reg;
705
706 if (kstrtol(buf, 10, &temp))
707 return -EINVAL;
708
709 mutex_lock(&data->lock);
710 data->force_pwm_max = temp;
711 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
712 if (temp)
713 reg |= ADT7470_FSPD_MASK;
714 else
715 reg &= ~ADT7470_FSPD_MASK;
716 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
717 mutex_unlock(&data->lock);
718
719 return count;
720 }
721
722 static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
723 char *buf)
724 {
725 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
726 struct adt7470_data *data = adt7470_update_device(dev);
727
728 if (IS_ERR(data))
729 return PTR_ERR(data);
730
731 return sprintf(buf, "%d\n", data->pwm[attr->index]);
732 }
733
734 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
735 const char *buf, size_t count)
736 {
737 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
738 struct adt7470_data *data = dev_get_drvdata(dev);
739 struct i2c_client *client = data->client;
740 long temp;
741
742 if (kstrtol(buf, 10, &temp))
743 return -EINVAL;
744
745 temp = clamp_val(temp, 0, 255);
746
747 mutex_lock(&data->lock);
748 data->pwm[attr->index] = temp;
749 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
750 mutex_unlock(&data->lock);
751
752 return count;
753 }
754
755 /* These are the valid PWM frequencies to the nearest Hz */
756 static const int adt7470_freq_map[] = {
757 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
758 };
759
760 static ssize_t pwm1_freq_show(struct device *dev,
761 struct device_attribute *devattr, char *buf)
762 {
763 struct adt7470_data *data = adt7470_update_device(dev);
764 unsigned char cfg_reg_1;
765 unsigned char cfg_reg_2;
766 int index;
767
768 mutex_lock(&data->lock);
769 cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
770 cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
771 mutex_unlock(&data->lock);
772
773 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
774 if (!(cfg_reg_1 & ADT7470_CFG_LF))
775 index += 8;
776 if (index >= ARRAY_SIZE(adt7470_freq_map))
777 index = ARRAY_SIZE(adt7470_freq_map) - 1;
778
779 return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
780 }
781
782 static ssize_t pwm1_freq_store(struct device *dev,
783 struct device_attribute *devattr,
784 const char *buf, size_t count)
785 {
786 struct adt7470_data *data = dev_get_drvdata(dev);
787 struct i2c_client *client = data->client;
788 long freq;
789 int index;
790 int low_freq = ADT7470_CFG_LF;
791 unsigned char val;
792
793 if (kstrtol(buf, 10, &freq))
794 return -EINVAL;
795
796 /* Round the user value given to the closest available frequency */
797 index = find_closest(freq, adt7470_freq_map,
798 ARRAY_SIZE(adt7470_freq_map));
799
800 if (index >= 8) {
801 index -= 8;
802 low_freq = 0;
803 }
804
805 mutex_lock(&data->lock);
806 /* Configuration Register 1 */
807 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
808 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
809 (val & ~ADT7470_CFG_LF) | low_freq);
810 /* Configuration Register 2 */
811 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
812 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
813 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
814 mutex_unlock(&data->lock);
815
816 return count;
817 }
818
819 static ssize_t pwm_max_show(struct device *dev,
820 struct device_attribute *devattr, char *buf)
821 {
822 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
823 struct adt7470_data *data = adt7470_update_device(dev);
824
825 if (IS_ERR(data))
826 return PTR_ERR(data);
827
828 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
829 }
830
831 static ssize_t pwm_max_store(struct device *dev,
832 struct device_attribute *devattr,
833 const char *buf, size_t count)
834 {
835 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
836 struct adt7470_data *data = dev_get_drvdata(dev);
837 struct i2c_client *client = data->client;
838 long temp;
839
840 if (kstrtol(buf, 10, &temp))
841 return -EINVAL;
842
843 temp = clamp_val(temp, 0, 255);
844
845 mutex_lock(&data->lock);
846 data->pwm_max[attr->index] = temp;
847 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
848 temp);
849 mutex_unlock(&data->lock);
850
851 return count;
852 }
853
854 static ssize_t pwm_min_show(struct device *dev,
855 struct device_attribute *devattr, char *buf)
856 {
857 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
858 struct adt7470_data *data = adt7470_update_device(dev);
859
860 if (IS_ERR(data))
861 return PTR_ERR(data);
862
863 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
864 }
865
866 static ssize_t pwm_min_store(struct device *dev,
867 struct device_attribute *devattr,
868 const char *buf, size_t count)
869 {
870 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
871 struct adt7470_data *data = dev_get_drvdata(dev);
872 struct i2c_client *client = data->client;
873 long temp;
874
875 if (kstrtol(buf, 10, &temp))
876 return -EINVAL;
877
878 temp = clamp_val(temp, 0, 255);
879
880 mutex_lock(&data->lock);
881 data->pwm_min[attr->index] = temp;
882 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
883 temp);
884 mutex_unlock(&data->lock);
885
886 return count;
887 }
888
889 static ssize_t pwm_tmax_show(struct device *dev,
890 struct device_attribute *devattr, char *buf)
891 {
892 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
893 struct adt7470_data *data = adt7470_update_device(dev);
894
895 if (IS_ERR(data))
896 return PTR_ERR(data);
897
898 /* the datasheet says that tmax = tmin + 20C */
899 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
900 }
901
902 static ssize_t pwm_tmin_show(struct device *dev,
903 struct device_attribute *devattr, char *buf)
904 {
905 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
906 struct adt7470_data *data = adt7470_update_device(dev);
907
908 if (IS_ERR(data))
909 return PTR_ERR(data);
910
911 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
912 }
913
914 static ssize_t pwm_tmin_store(struct device *dev,
915 struct device_attribute *devattr,
916 const char *buf, size_t count)
917 {
918 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
919 struct adt7470_data *data = dev_get_drvdata(dev);
920 struct i2c_client *client = data->client;
921 long temp;
922
923 if (kstrtol(buf, 10, &temp))
924 return -EINVAL;
925
926 temp = clamp_val(temp, -128000, 127000);
927 temp = DIV_ROUND_CLOSEST(temp, 1000);
928
929 mutex_lock(&data->lock);
930 data->pwm_tmin[attr->index] = temp;
931 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
932 temp);
933 mutex_unlock(&data->lock);
934
935 return count;
936 }
937
938 static ssize_t pwm_auto_show(struct device *dev,
939 struct device_attribute *devattr, char *buf)
940 {
941 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
942 struct adt7470_data *data = adt7470_update_device(dev);
943
944 if (IS_ERR(data))
945 return PTR_ERR(data);
946
947 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
948 }
949
950 static ssize_t pwm_auto_store(struct device *dev,
951 struct device_attribute *devattr,
952 const char *buf, size_t count)
953 {
954 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
955 struct adt7470_data *data = dev_get_drvdata(dev);
956 struct i2c_client *client = data->client;
957 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
958 int pwm_auto_reg_mask;
959 long temp;
960 u8 reg;
961
962 if (kstrtol(buf, 10, &temp))
963 return -EINVAL;
964
965 if (attr->index % 2)
966 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
967 else
968 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
969
970 if (temp != 2 && temp != 1)
971 return -EINVAL;
972 temp--;
973
974 mutex_lock(&data->lock);
975 data->pwm_automatic[attr->index] = temp;
976 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
977 if (temp)
978 reg |= pwm_auto_reg_mask;
979 else
980 reg &= ~pwm_auto_reg_mask;
981 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
982 mutex_unlock(&data->lock);
983
984 return count;
985 }
986
987 static ssize_t pwm_auto_temp_show(struct device *dev,
988 struct device_attribute *devattr, char *buf)
989 {
990 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
991 struct adt7470_data *data = adt7470_update_device(dev);
992 u8 ctrl;
993
994 if (IS_ERR(data))
995 return PTR_ERR(data);
996
997 ctrl = data->pwm_auto_temp[attr->index];
998 if (ctrl)
999 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
1000 else
1001 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
1002 }
1003
1004 static int cvt_auto_temp(int input)
1005 {
1006 if (input == ADT7470_PWM_ALL_TEMPS)
1007 return 0;
1008 if (input < 1 || !is_power_of_2(input))
1009 return -EINVAL;
1010 return ilog2(input) + 1;
1011 }
1012
1013 static ssize_t pwm_auto_temp_store(struct device *dev,
1014 struct device_attribute *devattr,
1015 const char *buf, size_t count)
1016 {
1017 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1018 struct adt7470_data *data = dev_get_drvdata(dev);
1019 struct i2c_client *client = data->client;
1020 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
1021 long temp;
1022 u8 reg;
1023
1024 if (kstrtol(buf, 10, &temp))
1025 return -EINVAL;
1026
1027 temp = cvt_auto_temp(temp);
1028 if (temp < 0)
1029 return temp;
1030
1031 mutex_lock(&data->lock);
1032 data->pwm_automatic[attr->index] = temp;
1033 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
1034
1035 if (!(attr->index % 2)) {
1036 reg &= 0xF;
1037 reg |= (temp << 4) & 0xF0;
1038 } else {
1039 reg &= 0xF0;
1040 reg |= temp & 0xF;
1041 }
1042
1043 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
1044 mutex_unlock(&data->lock);
1045
1046 return count;
1047 }
1048
1049 static ssize_t alarm_show(struct device *dev,
1050 struct device_attribute *devattr, char *buf)
1051 {
1052 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1053 struct adt7470_data *data = adt7470_update_device(dev);
1054
1055 if (data->alarm & attr->index)
1056 return sprintf(buf, "1\n");
1057 else
1058 return sprintf(buf, "0\n");
1059 }
1060
1061 static DEVICE_ATTR_RW(alarm_mask);
1062 static DEVICE_ATTR_RW(num_temp_sensors);
1063 static DEVICE_ATTR_RW(auto_update_interval);
1064
1065 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
1066 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
1067 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
1068 static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
1069 static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
1070 static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
1071 static SENSOR_DEVICE_ATTR_RW(temp7_max, temp_max, 6);
1072 static SENSOR_DEVICE_ATTR_RW(temp8_max, temp_max, 7);
1073 static SENSOR_DEVICE_ATTR_RW(temp9_max, temp_max, 8);
1074 static SENSOR_DEVICE_ATTR_RW(temp10_max, temp_max, 9);
1075
1076 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
1077 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
1078 static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
1079 static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3);
1080 static SENSOR_DEVICE_ATTR_RW(temp5_min, temp_min, 4);
1081 static SENSOR_DEVICE_ATTR_RW(temp6_min, temp_min, 5);
1082 static SENSOR_DEVICE_ATTR_RW(temp7_min, temp_min, 6);
1083 static SENSOR_DEVICE_ATTR_RW(temp8_min, temp_min, 7);
1084 static SENSOR_DEVICE_ATTR_RW(temp9_min, temp_min, 8);
1085 static SENSOR_DEVICE_ATTR_RW(temp10_min, temp_min, 9);
1086
1087 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
1088 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
1089 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
1090 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
1091 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
1092 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
1093 static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6);
1094 static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7);
1095 static SENSOR_DEVICE_ATTR_RO(temp9_input, temp, 8);
1096 static SENSOR_DEVICE_ATTR_RO(temp10_input, temp, 9);
1097
1098 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, ADT7470_R1T_ALARM);
1099 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, ADT7470_R2T_ALARM);
1100 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, ADT7470_R3T_ALARM);
1101 static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, ADT7470_R4T_ALARM);
1102 static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, ADT7470_R5T_ALARM);
1103 static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, ADT7470_R6T_ALARM);
1104 static SENSOR_DEVICE_ATTR_RO(temp7_alarm, alarm, ADT7470_R7T_ALARM);
1105 static SENSOR_DEVICE_ATTR_RO(temp8_alarm, alarm, ALARM2(ADT7470_R8T_ALARM));
1106 static SENSOR_DEVICE_ATTR_RO(temp9_alarm, alarm, ALARM2(ADT7470_R9T_ALARM));
1107 static SENSOR_DEVICE_ATTR_RO(temp10_alarm, alarm, ALARM2(ADT7470_R10T_ALARM));
1108
1109 static SENSOR_DEVICE_ATTR_RW(fan1_max, fan_max, 0);
1110 static SENSOR_DEVICE_ATTR_RW(fan2_max, fan_max, 1);
1111 static SENSOR_DEVICE_ATTR_RW(fan3_max, fan_max, 2);
1112 static SENSOR_DEVICE_ATTR_RW(fan4_max, fan_max, 3);
1113
1114 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
1115 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
1116 static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
1117 static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
1118
1119 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
1120 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
1121 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
1122 static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
1123
1124 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, ALARM2(ADT7470_FAN1_ALARM));
1125 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, ALARM2(ADT7470_FAN2_ALARM));
1126 static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, ALARM2(ADT7470_FAN3_ALARM));
1127 static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, ALARM2(ADT7470_FAN4_ALARM));
1128
1129 static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0);
1130
1131 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
1132 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
1133 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
1134 static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
1135
1136 static DEVICE_ATTR_RW(pwm1_freq);
1137
1138 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0);
1139 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1);
1140 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2);
1141 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3);
1142
1143 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0);
1144 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1);
1145 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2);
1146 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3);
1147
1148 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_tmin, 0);
1149 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_temp, pwm_tmin, 1);
1150 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_temp, pwm_tmin, 2);
1151 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_temp, pwm_tmin, 3);
1152
1153 static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point2_temp, pwm_tmax, 0);
1154 static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1);
1155 static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2);
1156 static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3);
1157
1158 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_auto, 0);
1159 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_auto, 1);
1160 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_auto, 2);
1161 static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_auto, 3);
1162
1163 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0);
1164 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1);
1165 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2);
1166 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3);
1167
1168 static struct attribute *adt7470_attrs[] = {
1169 &dev_attr_alarm_mask.attr,
1170 &dev_attr_num_temp_sensors.attr,
1171 &dev_attr_auto_update_interval.attr,
1172 &sensor_dev_attr_temp1_max.dev_attr.attr,
1173 &sensor_dev_attr_temp2_max.dev_attr.attr,
1174 &sensor_dev_attr_temp3_max.dev_attr.attr,
1175 &sensor_dev_attr_temp4_max.dev_attr.attr,
1176 &sensor_dev_attr_temp5_max.dev_attr.attr,
1177 &sensor_dev_attr_temp6_max.dev_attr.attr,
1178 &sensor_dev_attr_temp7_max.dev_attr.attr,
1179 &sensor_dev_attr_temp8_max.dev_attr.attr,
1180 &sensor_dev_attr_temp9_max.dev_attr.attr,
1181 &sensor_dev_attr_temp10_max.dev_attr.attr,
1182 &sensor_dev_attr_temp1_min.dev_attr.attr,
1183 &sensor_dev_attr_temp2_min.dev_attr.attr,
1184 &sensor_dev_attr_temp3_min.dev_attr.attr,
1185 &sensor_dev_attr_temp4_min.dev_attr.attr,
1186 &sensor_dev_attr_temp5_min.dev_attr.attr,
1187 &sensor_dev_attr_temp6_min.dev_attr.attr,
1188 &sensor_dev_attr_temp7_min.dev_attr.attr,
1189 &sensor_dev_attr_temp8_min.dev_attr.attr,
1190 &sensor_dev_attr_temp9_min.dev_attr.attr,
1191 &sensor_dev_attr_temp10_min.dev_attr.attr,
1192 &sensor_dev_attr_temp1_input.dev_attr.attr,
1193 &sensor_dev_attr_temp2_input.dev_attr.attr,
1194 &sensor_dev_attr_temp3_input.dev_attr.attr,
1195 &sensor_dev_attr_temp4_input.dev_attr.attr,
1196 &sensor_dev_attr_temp5_input.dev_attr.attr,
1197 &sensor_dev_attr_temp6_input.dev_attr.attr,
1198 &sensor_dev_attr_temp7_input.dev_attr.attr,
1199 &sensor_dev_attr_temp8_input.dev_attr.attr,
1200 &sensor_dev_attr_temp9_input.dev_attr.attr,
1201 &sensor_dev_attr_temp10_input.dev_attr.attr,
1202 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1203 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1204 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1205 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
1206 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
1207 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
1208 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
1209 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
1210 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
1211 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
1212 &sensor_dev_attr_fan1_max.dev_attr.attr,
1213 &sensor_dev_attr_fan2_max.dev_attr.attr,
1214 &sensor_dev_attr_fan3_max.dev_attr.attr,
1215 &sensor_dev_attr_fan4_max.dev_attr.attr,
1216 &sensor_dev_attr_fan1_min.dev_attr.attr,
1217 &sensor_dev_attr_fan2_min.dev_attr.attr,
1218 &sensor_dev_attr_fan3_min.dev_attr.attr,
1219 &sensor_dev_attr_fan4_min.dev_attr.attr,
1220 &sensor_dev_attr_fan1_input.dev_attr.attr,
1221 &sensor_dev_attr_fan2_input.dev_attr.attr,
1222 &sensor_dev_attr_fan3_input.dev_attr.attr,
1223 &sensor_dev_attr_fan4_input.dev_attr.attr,
1224 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1225 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1226 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1227 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1228 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1229 &sensor_dev_attr_pwm1.dev_attr.attr,
1230 &dev_attr_pwm1_freq.attr,
1231 &sensor_dev_attr_pwm2.dev_attr.attr,
1232 &sensor_dev_attr_pwm3.dev_attr.attr,
1233 &sensor_dev_attr_pwm4.dev_attr.attr,
1234 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1235 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1236 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1237 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1238 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1239 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1240 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1241 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1242 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1243 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1244 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1245 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1246 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1247 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1248 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1249 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1250 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1251 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1252 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1253 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1254 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1255 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1256 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1257 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1258 NULL
1259 };
1260
1261 ATTRIBUTE_GROUPS(adt7470);
1262
1263 /* Return 0 if detection is successful, -ENODEV otherwise */
1264 static int adt7470_detect(struct i2c_client *client,
1265 struct i2c_board_info *info)
1266 {
1267 struct i2c_adapter *adapter = client->adapter;
1268 int vendor, device, revision;
1269
1270 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1271 return -ENODEV;
1272
1273 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1274 if (vendor != ADT7470_VENDOR)
1275 return -ENODEV;
1276
1277 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1278 if (device != ADT7470_DEVICE)
1279 return -ENODEV;
1280
1281 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
1282 if (revision != ADT7470_REVISION)
1283 return -ENODEV;
1284
1285 strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1286
1287 return 0;
1288 }
1289
1290 static void adt7470_init_client(struct i2c_client *client)
1291 {
1292 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
1293
1294 if (reg < 0) {
1295 dev_err(&client->dev, "cannot read configuration register\n");
1296 } else {
1297 /* start monitoring (and do a self-test) */
1298 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
1299 }
1300 }
1301
1302 static int adt7470_probe(struct i2c_client *client)
1303 {
1304 struct device *dev = &client->dev;
1305 struct adt7470_data *data;
1306 struct device *hwmon_dev;
1307
1308 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
1309 if (!data)
1310 return -ENOMEM;
1311
1312 data->num_temp_sensors = -1;
1313 data->auto_update_interval = AUTO_UPDATE_INTERVAL;
1314
1315 i2c_set_clientdata(client, data);
1316 data->client = client;
1317 mutex_init(&data->lock);
1318
1319 dev_info(&client->dev, "%s chip found\n", client->name);
1320
1321 /* Initialize the ADT7470 chip */
1322 adt7470_init_client(client);
1323
1324 /* Register sysfs hooks */
1325 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1326 data,
1327 adt7470_groups);
1328
1329 if (IS_ERR(hwmon_dev))
1330 return PTR_ERR(hwmon_dev);
1331
1332 data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
1333 dev_name(hwmon_dev));
1334 if (IS_ERR(data->auto_update)) {
1335 return PTR_ERR(data->auto_update);
1336 }
1337
1338 return 0;
1339 }
1340
1341 static int adt7470_remove(struct i2c_client *client)
1342 {
1343 struct adt7470_data *data = i2c_get_clientdata(client);
1344
1345 kthread_stop(data->auto_update);
1346 return 0;
1347 }
1348
1349 static const struct i2c_device_id adt7470_id[] = {
1350 { "adt7470", 0 },
1351 { }
1352 };
1353 MODULE_DEVICE_TABLE(i2c, adt7470_id);
1354
1355 static struct i2c_driver adt7470_driver = {
1356 .class = I2C_CLASS_HWMON,
1357 .driver = {
1358 .name = "adt7470",
1359 },
1360 .probe_new = adt7470_probe,
1361 .remove = adt7470_remove,
1362 .id_table = adt7470_id,
1363 .detect = adt7470_detect,
1364 .address_list = normal_i2c,
1365 };
1366
1367 module_i2c_driver(adt7470_driver);
1368
1369 MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1370 MODULE_DESCRIPTION("ADT7470 driver");
1371 MODULE_LICENSE("GPL");
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