]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blob - drivers/hwmon/adt7475.c
projects / mirror_ubuntu-hirsute-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'for-5.4/libata-2019-09-15' of git://git.kernel.dk/linux-block
[mirror_ubuntu-hirsute-kernel.git] / drivers / hwmon / adt7475.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * adt7475 - Thermal sensor driver for the ADT7475 chip and derivatives
4 * Copyright (C) 2007-2008, Advanced Micro Devices, Inc.
5 * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
6 * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
7 * Copyright (C) 2009 Jean Delvare <jdelvare@suse.de>
8 *
9 * Derived from the lm83 driver by Jean Delvare
10 */
11
12 #include <linux/module.h>
13 #include <linux/of_device.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/i2c.h>
17 #include <linux/hwmon.h>
18 #include <linux/hwmon-sysfs.h>
19 #include <linux/hwmon-vid.h>
20 #include <linux/err.h>
21 #include <linux/jiffies.h>
22 #include <linux/util_macros.h>
23
24 /* Indexes for the sysfs hooks */
25
26 #define INPUT 0
27 #define MIN 1
28 #define MAX 2
29 #define CONTROL 3
30 #define OFFSET 3
31 #define AUTOMIN 4
32 #define THERM 5
33 #define HYSTERSIS 6
34
35 /*
36 * These are unique identifiers for the sysfs functions - unlike the
37 * numbers above, these are not also indexes into an array
38 */
39
40 #define ALARM 9
41 #define FAULT 10
42
43 /* 7475 Common Registers */
44
45 #define REG_DEVREV2 0x12 /* ADT7490 only */
46
47 #define REG_VTT 0x1E /* ADT7490 only */
48 #define REG_EXTEND3 0x1F /* ADT7490 only */
49
50 #define REG_VOLTAGE_BASE 0x20
51 #define REG_TEMP_BASE 0x25
52 #define REG_TACH_BASE 0x28
53 #define REG_PWM_BASE 0x30
54 #define REG_PWM_MAX_BASE 0x38
55
56 #define REG_DEVID 0x3D
57 #define REG_VENDID 0x3E
58 #define REG_DEVID2 0x3F
59
60 #define REG_CONFIG1 0x40
61
62 #define REG_STATUS1 0x41
63 #define REG_STATUS2 0x42
64
65 #define REG_VID 0x43 /* ADT7476 only */
66
67 #define REG_VOLTAGE_MIN_BASE 0x44
68 #define REG_VOLTAGE_MAX_BASE 0x45
69
70 #define REG_TEMP_MIN_BASE 0x4E
71 #define REG_TEMP_MAX_BASE 0x4F
72
73 #define REG_TACH_MIN_BASE 0x54
74
75 #define REG_PWM_CONFIG_BASE 0x5C
76
77 #define REG_TEMP_TRANGE_BASE 0x5F
78
79 #define REG_ENHANCE_ACOUSTICS1 0x62
80 #define REG_ENHANCE_ACOUSTICS2 0x63
81
82 #define REG_PWM_MIN_BASE 0x64
83
84 #define REG_TEMP_TMIN_BASE 0x67
85 #define REG_TEMP_THERM_BASE 0x6A
86
87 #define REG_REMOTE1_HYSTERSIS 0x6D
88 #define REG_REMOTE2_HYSTERSIS 0x6E
89
90 #define REG_TEMP_OFFSET_BASE 0x70
91
92 #define REG_CONFIG2 0x73
93
94 #define REG_EXTEND1 0x76
95 #define REG_EXTEND2 0x77
96
97 #define REG_CONFIG3 0x78
98 #define REG_CONFIG5 0x7C
99 #define REG_CONFIG4 0x7D
100
101 #define REG_STATUS4 0x81 /* ADT7490 only */
102
103 #define REG_VTT_MIN 0x84 /* ADT7490 only */
104 #define REG_VTT_MAX 0x86 /* ADT7490 only */
105
106 #define VID_VIDSEL 0x80 /* ADT7476 only */
107
108 #define CONFIG2_ATTN 0x20
109
110 #define CONFIG3_SMBALERT 0x01
111 #define CONFIG3_THERM 0x02
112
113 #define CONFIG4_PINFUNC 0x03
114 #define CONFIG4_MAXDUTY 0x08
115 #define CONFIG4_ATTN_IN10 0x30
116 #define CONFIG4_ATTN_IN43 0xC0
117
118 #define CONFIG5_TWOSCOMP 0x01
119 #define CONFIG5_TEMPOFFSET 0x02
120 #define CONFIG5_VIDGPIO 0x10 /* ADT7476 only */
121
122 /* ADT7475 Settings */
123
124 #define ADT7475_VOLTAGE_COUNT 5 /* Not counting Vtt */
125 #define ADT7475_TEMP_COUNT 3
126 #define ADT7475_TACH_COUNT 4
127 #define ADT7475_PWM_COUNT 3
128
129 /* Macro to read the registers */
130
131 #define adt7475_read(reg) i2c_smbus_read_byte_data(client, (reg))
132
133 /* Macros to easily index the registers */
134
135 #define TACH_REG(idx) (REG_TACH_BASE + ((idx) * 2))
136 #define TACH_MIN_REG(idx) (REG_TACH_MIN_BASE + ((idx) * 2))
137
138 #define PWM_REG(idx) (REG_PWM_BASE + (idx))
139 #define PWM_MAX_REG(idx) (REG_PWM_MAX_BASE + (idx))
140 #define PWM_MIN_REG(idx) (REG_PWM_MIN_BASE + (idx))
141 #define PWM_CONFIG_REG(idx) (REG_PWM_CONFIG_BASE + (idx))
142
143 #define VOLTAGE_REG(idx) (REG_VOLTAGE_BASE + (idx))
144 #define VOLTAGE_MIN_REG(idx) (REG_VOLTAGE_MIN_BASE + ((idx) * 2))
145 #define VOLTAGE_MAX_REG(idx) (REG_VOLTAGE_MAX_BASE + ((idx) * 2))
146
147 #define TEMP_REG(idx) (REG_TEMP_BASE + (idx))
148 #define TEMP_MIN_REG(idx) (REG_TEMP_MIN_BASE + ((idx) * 2))
149 #define TEMP_MAX_REG(idx) (REG_TEMP_MAX_BASE + ((idx) * 2))
150 #define TEMP_TMIN_REG(idx) (REG_TEMP_TMIN_BASE + (idx))
151 #define TEMP_THERM_REG(idx) (REG_TEMP_THERM_BASE + (idx))
152 #define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx))
153 #define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx))
154
155 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
156
157 enum chips { adt7473, adt7475, adt7476, adt7490 };
158
159 static const struct i2c_device_id adt7475_id[] = {
160 { "adt7473", adt7473 },
161 { "adt7475", adt7475 },
162 { "adt7476", adt7476 },
163 { "adt7490", adt7490 },
164 { }
165 };
166 MODULE_DEVICE_TABLE(i2c, adt7475_id);
167
168 static const struct of_device_id __maybe_unused adt7475_of_match[] = {
169 {
170 .compatible = "adi,adt7473",
171 .data = (void *)adt7473
172 },
173 {
174 .compatible = "adi,adt7475",
175 .data = (void *)adt7475
176 },
177 {
178 .compatible = "adi,adt7476",
179 .data = (void *)adt7476
180 },
181 {
182 .compatible = "adi,adt7490",
183 .data = (void *)adt7490
184 },
185 { },
186 };
187 MODULE_DEVICE_TABLE(of, adt7475_of_match);
188
189 struct adt7475_data {
190 struct i2c_client *client;
191 struct mutex lock;
192
193 unsigned long measure_updated;
194 bool valid;
195
196 u8 config4;
197 u8 config5;
198 u8 has_voltage;
199 u8 bypass_attn; /* Bypass voltage attenuator */
200 u8 has_pwm2:1;
201 u8 has_fan4:1;
202 u8 has_vid:1;
203 u32 alarms;
204 u16 voltage[3][6];
205 u16 temp[7][3];
206 u16 tach[2][4];
207 u8 pwm[4][3];
208 u8 range[3];
209 u8 pwmctl[3];
210 u8 pwmchan[3];
211 u8 enh_acoustics[2];
212
213 u8 vid;
214 u8 vrm;
215 const struct attribute_group *groups[9];
216 };
217
218 static struct i2c_driver adt7475_driver;
219 static struct adt7475_data *adt7475_update_device(struct device *dev);
220 static void adt7475_read_hystersis(struct i2c_client *client);
221 static void adt7475_read_pwm(struct i2c_client *client, int index);
222
223 /* Given a temp value, convert it to register value */
224
225 static inline u16 temp2reg(struct adt7475_data *data, long val)
226 {
227 u16 ret;
228
229 if (!(data->config5 & CONFIG5_TWOSCOMP)) {
230 val = clamp_val(val, -64000, 191000);
231 ret = (val + 64500) / 1000;
232 } else {
233 val = clamp_val(val, -128000, 127000);
234 if (val < -500)
235 ret = (256500 + val) / 1000;
236 else
237 ret = (val + 500) / 1000;
238 }
239
240 return ret << 2;
241 }
242
243 /* Given a register value, convert it to a real temp value */
244
245 static inline int reg2temp(struct adt7475_data *data, u16 reg)
246 {
247 if (data->config5 & CONFIG5_TWOSCOMP) {
248 if (reg >= 512)
249 return (reg - 1024) * 250;
250 else
251 return reg * 250;
252 } else
253 return (reg - 256) * 250;
254 }
255
256 static inline int tach2rpm(u16 tach)
257 {
258 if (tach == 0 || tach == 0xFFFF)
259 return 0;
260
261 return (90000 * 60) / tach;
262 }
263
264 static inline u16 rpm2tach(unsigned long rpm)
265 {
266 if (rpm == 0)
267 return 0;
268
269 return clamp_val((90000 * 60) / rpm, 1, 0xFFFF);
270 }
271
272 /* Scaling factors for voltage inputs, taken from the ADT7490 datasheet */
273 static const int adt7473_in_scaling[ADT7475_VOLTAGE_COUNT + 1][2] = {
274 { 45, 94 }, /* +2.5V */
275 { 175, 525 }, /* Vccp */
276 { 68, 71 }, /* Vcc */
277 { 93, 47 }, /* +5V */
278 { 120, 20 }, /* +12V */
279 { 45, 45 }, /* Vtt */
280 };
281
282 static inline int reg2volt(int channel, u16 reg, u8 bypass_attn)
283 {
284 const int *r = adt7473_in_scaling[channel];
285
286 if (bypass_attn & (1 << channel))
287 return DIV_ROUND_CLOSEST(reg * 2250, 1024);
288 return DIV_ROUND_CLOSEST(reg * (r[0] + r[1]) * 2250, r[1] * 1024);
289 }
290
291 static inline u16 volt2reg(int channel, long volt, u8 bypass_attn)
292 {
293 const int *r = adt7473_in_scaling[channel];
294 long reg;
295
296 if (bypass_attn & (1 << channel))
297 reg = (volt * 1024) / 2250;
298 else
299 reg = (volt * r[1] * 1024) / ((r[0] + r[1]) * 2250);
300 return clamp_val(reg, 0, 1023) & (0xff << 2);
301 }
302
303 static int adt7475_read_word(struct i2c_client *client, int reg)
304 {
305 int val1, val2;
306
307 val1 = i2c_smbus_read_byte_data(client, reg);
308 if (val1 < 0)
309 return val1;
310 val2 = i2c_smbus_read_byte_data(client, reg + 1);
311 if (val2 < 0)
312 return val2;
313
314 return val1 | (val2 << 8);
315 }
316
317 static void adt7475_write_word(struct i2c_client *client, int reg, u16 val)
318 {
319 i2c_smbus_write_byte_data(client, reg + 1, val >> 8);
320 i2c_smbus_write_byte_data(client, reg, val & 0xFF);
321 }
322
323 static ssize_t voltage_show(struct device *dev, struct device_attribute *attr,
324 char *buf)
325 {
326 struct adt7475_data *data = adt7475_update_device(dev);
327 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
328 unsigned short val;
329
330 if (IS_ERR(data))
331 return PTR_ERR(data);
332
333 switch (sattr->nr) {
334 case ALARM:
335 return sprintf(buf, "%d\n",
336 (data->alarms >> sattr->index) & 1);
337 default:
338 val = data->voltage[sattr->nr][sattr->index];
339 return sprintf(buf, "%d\n",
340 reg2volt(sattr->index, val, data->bypass_attn));
341 }
342 }
343
344 static ssize_t voltage_store(struct device *dev,
345 struct device_attribute *attr, const char *buf,
346 size_t count)
347 {
348
349 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
350 struct adt7475_data *data = dev_get_drvdata(dev);
351 struct i2c_client *client = data->client;
352 unsigned char reg;
353 long val;
354
355 if (kstrtol(buf, 10, &val))
356 return -EINVAL;
357
358 mutex_lock(&data->lock);
359
360 data->voltage[sattr->nr][sattr->index] =
361 volt2reg(sattr->index, val, data->bypass_attn);
362
363 if (sattr->index < ADT7475_VOLTAGE_COUNT) {
364 if (sattr->nr == MIN)
365 reg = VOLTAGE_MIN_REG(sattr->index);
366 else
367 reg = VOLTAGE_MAX_REG(sattr->index);
368 } else {
369 if (sattr->nr == MIN)
370 reg = REG_VTT_MIN;
371 else
372 reg = REG_VTT_MAX;
373 }
374
375 i2c_smbus_write_byte_data(client, reg,
376 data->voltage[sattr->nr][sattr->index] >> 2);
377 mutex_unlock(&data->lock);
378
379 return count;
380 }
381
382 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
383 char *buf)
384 {
385 struct adt7475_data *data = adt7475_update_device(dev);
386 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
387 int out;
388
389 if (IS_ERR(data))
390 return PTR_ERR(data);
391
392 switch (sattr->nr) {
393 case HYSTERSIS:
394 mutex_lock(&data->lock);
395 out = data->temp[sattr->nr][sattr->index];
396 if (sattr->index != 1)
397 out = (out >> 4) & 0xF;
398 else
399 out = (out & 0xF);
400 /*
401 * Show the value as an absolute number tied to
402 * THERM
403 */
404 out = reg2temp(data, data->temp[THERM][sattr->index]) -
405 out * 1000;
406 mutex_unlock(&data->lock);
407 break;
408
409 case OFFSET:
410 /*
411 * Offset is always 2's complement, regardless of the
412 * setting in CONFIG5
413 */
414 mutex_lock(&data->lock);
415 out = (s8)data->temp[sattr->nr][sattr->index];
416 if (data->config5 & CONFIG5_TEMPOFFSET)
417 out *= 1000;
418 else
419 out *= 500;
420 mutex_unlock(&data->lock);
421 break;
422
423 case ALARM:
424 out = (data->alarms >> (sattr->index + 4)) & 1;
425 break;
426
427 case FAULT:
428 /* Note - only for remote1 and remote2 */
429 out = !!(data->alarms & (sattr->index ? 0x8000 : 0x4000));
430 break;
431
432 default:
433 /* All other temp values are in the configured format */
434 out = reg2temp(data, data->temp[sattr->nr][sattr->index]);
435 }
436
437 return sprintf(buf, "%d\n", out);
438 }
439
440 static ssize_t temp_store(struct device *dev, struct device_attribute *attr,
441 const char *buf, size_t count)
442 {
443 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
444 struct adt7475_data *data = dev_get_drvdata(dev);
445 struct i2c_client *client = data->client;
446 unsigned char reg = 0;
447 u8 out;
448 int temp;
449 long val;
450
451 if (kstrtol(buf, 10, &val))
452 return -EINVAL;
453
454 mutex_lock(&data->lock);
455
456 /* We need the config register in all cases for temp <-> reg conv. */
457 data->config5 = adt7475_read(REG_CONFIG5);
458
459 switch (sattr->nr) {
460 case OFFSET:
461 if (data->config5 & CONFIG5_TEMPOFFSET) {
462 val = clamp_val(val, -63000, 127000);
463 out = data->temp[OFFSET][sattr->index] = val / 1000;
464 } else {
465 val = clamp_val(val, -63000, 64000);
466 out = data->temp[OFFSET][sattr->index] = val / 500;
467 }
468 break;
469
470 case HYSTERSIS:
471 /*
472 * The value will be given as an absolute value, turn it
473 * into an offset based on THERM
474 */
475
476 /* Read fresh THERM and HYSTERSIS values from the chip */
477 data->temp[THERM][sattr->index] =
478 adt7475_read(TEMP_THERM_REG(sattr->index)) << 2;
479 adt7475_read_hystersis(client);
480
481 temp = reg2temp(data, data->temp[THERM][sattr->index]);
482 val = clamp_val(val, temp - 15000, temp);
483 val = (temp - val) / 1000;
484
485 if (sattr->index != 1) {
486 data->temp[HYSTERSIS][sattr->index] &= 0xF0;
487 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4;
488 } else {
489 data->temp[HYSTERSIS][sattr->index] &= 0x0F;
490 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF);
491 }
492
493 out = data->temp[HYSTERSIS][sattr->index];
494 break;
495
496 default:
497 data->temp[sattr->nr][sattr->index] = temp2reg(data, val);
498
499 /*
500 * We maintain an extra 2 digits of precision for simplicity
501 * - shift those back off before writing the value
502 */
503 out = (u8) (data->temp[sattr->nr][sattr->index] >> 2);
504 }
505
506 switch (sattr->nr) {
507 case MIN:
508 reg = TEMP_MIN_REG(sattr->index);
509 break;
510 case MAX:
511 reg = TEMP_MAX_REG(sattr->index);
512 break;
513 case OFFSET:
514 reg = TEMP_OFFSET_REG(sattr->index);
515 break;
516 case AUTOMIN:
517 reg = TEMP_TMIN_REG(sattr->index);
518 break;
519 case THERM:
520 reg = TEMP_THERM_REG(sattr->index);
521 break;
522 case HYSTERSIS:
523 if (sattr->index != 2)
524 reg = REG_REMOTE1_HYSTERSIS;
525 else
526 reg = REG_REMOTE2_HYSTERSIS;
527
528 break;
529 }
530
531 i2c_smbus_write_byte_data(client, reg, out);
532
533 mutex_unlock(&data->lock);
534 return count;
535 }
536
537 /* Assuming CONFIG6[SLOW] is 0 */
538 static const int ad7475_st_map[] = {
539 37500, 18800, 12500, 7500, 4700, 3100, 1600, 800,
540 };
541
542 static ssize_t temp_st_show(struct device *dev, struct device_attribute *attr,
543 char *buf)
544 {
545 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
546 struct adt7475_data *data = dev_get_drvdata(dev);
547 long val;
548
549 switch (sattr->index) {
550 case 0:
551 val = data->enh_acoustics[0] & 0xf;
552 break;
553 case 1:
554 val = (data->enh_acoustics[1] >> 4) & 0xf;
555 break;
556 case 2:
557 default:
558 val = data->enh_acoustics[1] & 0xf;
559 break;
560 }
561
562 if (val & 0x8)
563 return sprintf(buf, "%d\n", ad7475_st_map[val & 0x7]);
564 else
565 return sprintf(buf, "0\n");
566 }
567
568 static ssize_t temp_st_store(struct device *dev,
569 struct device_attribute *attr, const char *buf,
570 size_t count)
571 {
572 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
573 struct adt7475_data *data = dev_get_drvdata(dev);
574 struct i2c_client *client = data->client;
575 unsigned char reg;
576 int shift, idx;
577 ulong val;
578
579 if (kstrtoul(buf, 10, &val))
580 return -EINVAL;
581
582 switch (sattr->index) {
583 case 0:
584 reg = REG_ENHANCE_ACOUSTICS1;
585 shift = 0;
586 idx = 0;
587 break;
588 case 1:
589 reg = REG_ENHANCE_ACOUSTICS2;
590 shift = 0;
591 idx = 1;
592 break;
593 case 2:
594 default:
595 reg = REG_ENHANCE_ACOUSTICS2;
596 shift = 4;
597 idx = 1;
598 break;
599 }
600
601 if (val > 0) {
602 val = find_closest_descending(val, ad7475_st_map,
603 ARRAY_SIZE(ad7475_st_map));
604 val |= 0x8;
605 }
606
607 mutex_lock(&data->lock);
608
609 data->enh_acoustics[idx] &= ~(0xf << shift);
610 data->enh_acoustics[idx] |= (val << shift);
611
612 i2c_smbus_write_byte_data(client, reg, data->enh_acoustics[idx]);
613
614 mutex_unlock(&data->lock);
615
616 return count;
617 }
618
619 /*
620 * Table of autorange values - the user will write the value in millidegrees,
621 * and we'll convert it
622 */
623 static const int autorange_table[] = {
624 2000, 2500, 3330, 4000, 5000, 6670, 8000,
625 10000, 13330, 16000, 20000, 26670, 32000, 40000,
626 53330, 80000
627 };
628
629 static ssize_t point2_show(struct device *dev, struct device_attribute *attr,
630 char *buf)
631 {
632 struct adt7475_data *data = adt7475_update_device(dev);
633 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
634 int out, val;
635
636 if (IS_ERR(data))
637 return PTR_ERR(data);
638
639 mutex_lock(&data->lock);
640 out = (data->range[sattr->index] >> 4) & 0x0F;
641 val = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
642 mutex_unlock(&data->lock);
643
644 return sprintf(buf, "%d\n", val + autorange_table[out]);
645 }
646
647 static ssize_t point2_store(struct device *dev, struct device_attribute *attr,
648 const char *buf, size_t count)
649 {
650 struct adt7475_data *data = dev_get_drvdata(dev);
651 struct i2c_client *client = data->client;
652 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
653 int temp;
654 long val;
655
656 if (kstrtol(buf, 10, &val))
657 return -EINVAL;
658
659 mutex_lock(&data->lock);
660
661 /* Get a fresh copy of the needed registers */
662 data->config5 = adt7475_read(REG_CONFIG5);
663 data->temp[AUTOMIN][sattr->index] =
664 adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2;
665 data->range[sattr->index] =
666 adt7475_read(TEMP_TRANGE_REG(sattr->index));
667
668 /*
669 * The user will write an absolute value, so subtract the start point
670 * to figure the range
671 */
672 temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
673 val = clamp_val(val, temp + autorange_table[0],
674 temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]);
675 val -= temp;
676
677 /* Find the nearest table entry to what the user wrote */
678 val = find_closest(val, autorange_table, ARRAY_SIZE(autorange_table));
679
680 data->range[sattr->index] &= ~0xF0;
681 data->range[sattr->index] |= val << 4;
682
683 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
684 data->range[sattr->index]);
685
686 mutex_unlock(&data->lock);
687 return count;
688 }
689
690 static ssize_t tach_show(struct device *dev, struct device_attribute *attr,
691 char *buf)
692 {
693 struct adt7475_data *data = adt7475_update_device(dev);
694 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
695 int out;
696
697 if (IS_ERR(data))
698 return PTR_ERR(data);
699
700 if (sattr->nr == ALARM)
701 out = (data->alarms >> (sattr->index + 10)) & 1;
702 else
703 out = tach2rpm(data->tach[sattr->nr][sattr->index]);
704
705 return sprintf(buf, "%d\n", out);
706 }
707
708 static ssize_t tach_store(struct device *dev, struct device_attribute *attr,
709 const char *buf, size_t count)
710 {
711
712 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
713 struct adt7475_data *data = dev_get_drvdata(dev);
714 struct i2c_client *client = data->client;
715 unsigned long val;
716
717 if (kstrtoul(buf, 10, &val))
718 return -EINVAL;
719
720 mutex_lock(&data->lock);
721
722 data->tach[MIN][sattr->index] = rpm2tach(val);
723
724 adt7475_write_word(client, TACH_MIN_REG(sattr->index),
725 data->tach[MIN][sattr->index]);
726
727 mutex_unlock(&data->lock);
728 return count;
729 }
730
731 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
732 char *buf)
733 {
734 struct adt7475_data *data = adt7475_update_device(dev);
735 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
736
737 if (IS_ERR(data))
738 return PTR_ERR(data);
739
740 return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]);
741 }
742
743 static ssize_t pwmchan_show(struct device *dev, struct device_attribute *attr,
744 char *buf)
745 {
746 struct adt7475_data *data = adt7475_update_device(dev);
747 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
748
749 if (IS_ERR(data))
750 return PTR_ERR(data);
751
752 return sprintf(buf, "%d\n", data->pwmchan[sattr->index]);
753 }
754
755 static ssize_t pwmctrl_show(struct device *dev, struct device_attribute *attr,
756 char *buf)
757 {
758 struct adt7475_data *data = adt7475_update_device(dev);
759 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
760
761 if (IS_ERR(data))
762 return PTR_ERR(data);
763
764 return sprintf(buf, "%d\n", data->pwmctl[sattr->index]);
765 }
766
767 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
768 const char *buf, size_t count)
769 {
770
771 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
772 struct adt7475_data *data = dev_get_drvdata(dev);
773 struct i2c_client *client = data->client;
774 unsigned char reg = 0;
775 long val;
776
777 if (kstrtol(buf, 10, &val))
778 return -EINVAL;
779
780 mutex_lock(&data->lock);
781
782 switch (sattr->nr) {
783 case INPUT:
784 /* Get a fresh value for CONTROL */
785 data->pwm[CONTROL][sattr->index] =
786 adt7475_read(PWM_CONFIG_REG(sattr->index));
787
788 /*
789 * If we are not in manual mode, then we shouldn't allow
790 * the user to set the pwm speed
791 */
792 if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) {
793 mutex_unlock(&data->lock);
794 return count;
795 }
796
797 reg = PWM_REG(sattr->index);
798 break;
799
800 case MIN:
801 reg = PWM_MIN_REG(sattr->index);
802 break;
803
804 case MAX:
805 reg = PWM_MAX_REG(sattr->index);
806 break;
807 }
808
809 data->pwm[sattr->nr][sattr->index] = clamp_val(val, 0, 0xFF);
810 i2c_smbus_write_byte_data(client, reg,
811 data->pwm[sattr->nr][sattr->index]);
812 mutex_unlock(&data->lock);
813
814 return count;
815 }
816
817 static ssize_t stall_disable_show(struct device *dev,
818 struct device_attribute *attr, char *buf)
819 {
820 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
821 struct adt7475_data *data = dev_get_drvdata(dev);
822
823 u8 mask = BIT(5 + sattr->index);
824
825 return sprintf(buf, "%d\n", !!(data->enh_acoustics[0] & mask));
826 }
827
828 static ssize_t stall_disable_store(struct device *dev,
829 struct device_attribute *attr,
830 const char *buf, size_t count)
831 {
832 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
833 struct adt7475_data *data = dev_get_drvdata(dev);
834 struct i2c_client *client = data->client;
835 long val;
836 u8 mask = BIT(5 + sattr->index);
837
838 if (kstrtol(buf, 10, &val))
839 return -EINVAL;
840
841 mutex_lock(&data->lock);
842
843 data->enh_acoustics[0] &= ~mask;
844 if (val)
845 data->enh_acoustics[0] |= mask;
846
847 i2c_smbus_write_byte_data(client, REG_ENHANCE_ACOUSTICS1,
848 data->enh_acoustics[0]);
849
850 mutex_unlock(&data->lock);
851
852 return count;
853 }
854
855 /* Called by set_pwmctrl and set_pwmchan */
856
857 static int hw_set_pwm(struct i2c_client *client, int index,
858 unsigned int pwmctl, unsigned int pwmchan)
859 {
860 struct adt7475_data *data = i2c_get_clientdata(client);
861 long val = 0;
862
863 switch (pwmctl) {
864 case 0:
865 val = 0x03; /* Run at full speed */
866 break;
867 case 1:
868 val = 0x07; /* Manual mode */
869 break;
870 case 2:
871 switch (pwmchan) {
872 case 1:
873 /* Remote1 controls PWM */
874 val = 0x00;
875 break;
876 case 2:
877 /* local controls PWM */
878 val = 0x01;
879 break;
880 case 4:
881 /* remote2 controls PWM */
882 val = 0x02;
883 break;
884 case 6:
885 /* local/remote2 control PWM */
886 val = 0x05;
887 break;
888 case 7:
889 /* All three control PWM */
890 val = 0x06;
891 break;
892 default:
893 return -EINVAL;
894 }
895 break;
896 default:
897 return -EINVAL;
898 }
899
900 data->pwmctl[index] = pwmctl;
901 data->pwmchan[index] = pwmchan;
902
903 data->pwm[CONTROL][index] &= ~0xE0;
904 data->pwm[CONTROL][index] |= (val & 7) << 5;
905
906 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
907 data->pwm[CONTROL][index]);
908
909 return 0;
910 }
911
912 static ssize_t pwmchan_store(struct device *dev,
913 struct device_attribute *attr, const char *buf,
914 size_t count)
915 {
916 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
917 struct adt7475_data *data = dev_get_drvdata(dev);
918 struct i2c_client *client = data->client;
919 int r;
920 long val;
921
922 if (kstrtol(buf, 10, &val))
923 return -EINVAL;
924
925 mutex_lock(&data->lock);
926 /* Read Modify Write PWM values */
927 adt7475_read_pwm(client, sattr->index);
928 r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val);
929 if (r)
930 count = r;
931 mutex_unlock(&data->lock);
932
933 return count;
934 }
935
936 static ssize_t pwmctrl_store(struct device *dev,
937 struct device_attribute *attr, const char *buf,
938 size_t count)
939 {
940 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
941 struct adt7475_data *data = dev_get_drvdata(dev);
942 struct i2c_client *client = data->client;
943 int r;
944 long val;
945
946 if (kstrtol(buf, 10, &val))
947 return -EINVAL;
948
949 mutex_lock(&data->lock);
950 /* Read Modify Write PWM values */
951 adt7475_read_pwm(client, sattr->index);
952 r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]);
953 if (r)
954 count = r;
955 mutex_unlock(&data->lock);
956
957 return count;
958 }
959
960 /* List of frequencies for the PWM */
961 static const int pwmfreq_table[] = {
962 11, 14, 22, 29, 35, 44, 58, 88, 22500
963 };
964
965 static ssize_t pwmfreq_show(struct device *dev, struct device_attribute *attr,
966 char *buf)
967 {
968 struct adt7475_data *data = adt7475_update_device(dev);
969 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
970 int idx;
971
972 if (IS_ERR(data))
973 return PTR_ERR(data);
974 idx = clamp_val(data->range[sattr->index] & 0xf, 0,
975 ARRAY_SIZE(pwmfreq_table) - 1);
976
977 return sprintf(buf, "%d\n", pwmfreq_table[idx]);
978 }
979
980 static ssize_t pwmfreq_store(struct device *dev,
981 struct device_attribute *attr, const char *buf,
982 size_t count)
983 {
984 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
985 struct adt7475_data *data = dev_get_drvdata(dev);
986 struct i2c_client *client = data->client;
987 int out;
988 long val;
989
990 if (kstrtol(buf, 10, &val))
991 return -EINVAL;
992
993 out = find_closest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table));
994
995 mutex_lock(&data->lock);
996
997 data->range[sattr->index] =
998 adt7475_read(TEMP_TRANGE_REG(sattr->index));
999 data->range[sattr->index] &= ~0xf;
1000 data->range[sattr->index] |= out;
1001
1002 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
1003 data->range[sattr->index]);
1004
1005 mutex_unlock(&data->lock);
1006 return count;
1007 }
1008
1009 static ssize_t pwm_use_point2_pwm_at_crit_show(struct device *dev,
1010 struct device_attribute *devattr,
1011 char *buf)
1012 {
1013 struct adt7475_data *data = adt7475_update_device(dev);
1014
1015 if (IS_ERR(data))
1016 return PTR_ERR(data);
1017
1018 return sprintf(buf, "%d\n", !!(data->config4 & CONFIG4_MAXDUTY));
1019 }
1020
1021 static ssize_t pwm_use_point2_pwm_at_crit_store(struct device *dev,
1022 struct device_attribute *devattr,
1023 const char *buf, size_t count)
1024 {
1025 struct adt7475_data *data = dev_get_drvdata(dev);
1026 struct i2c_client *client = data->client;
1027 long val;
1028
1029 if (kstrtol(buf, 10, &val))
1030 return -EINVAL;
1031 if (val != 0 && val != 1)
1032 return -EINVAL;
1033
1034 mutex_lock(&data->lock);
1035 data->config4 = i2c_smbus_read_byte_data(client, REG_CONFIG4);
1036 if (val)
1037 data->config4 |= CONFIG4_MAXDUTY;
1038 else
1039 data->config4 &= ~CONFIG4_MAXDUTY;
1040 i2c_smbus_write_byte_data(client, REG_CONFIG4, data->config4);
1041 mutex_unlock(&data->lock);
1042
1043 return count;
1044 }
1045
1046 static ssize_t vrm_show(struct device *dev, struct device_attribute *devattr,
1047 char *buf)
1048 {
1049 struct adt7475_data *data = dev_get_drvdata(dev);
1050 return sprintf(buf, "%d\n", (int)data->vrm);
1051 }
1052
1053 static ssize_t vrm_store(struct device *dev, struct device_attribute *devattr,
1054 const char *buf, size_t count)
1055 {
1056 struct adt7475_data *data = dev_get_drvdata(dev);
1057 long val;
1058
1059 if (kstrtol(buf, 10, &val))
1060 return -EINVAL;
1061 if (val < 0 || val > 255)
1062 return -EINVAL;
1063 data->vrm = val;
1064
1065 return count;
1066 }
1067
1068 static ssize_t cpu0_vid_show(struct device *dev,
1069 struct device_attribute *devattr, char *buf)
1070 {
1071 struct adt7475_data *data = adt7475_update_device(dev);
1072
1073 if (IS_ERR(data))
1074 return PTR_ERR(data);
1075
1076 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
1077 }
1078
1079 static SENSOR_DEVICE_ATTR_2_RO(in0_input, voltage, INPUT, 0);
1080 static SENSOR_DEVICE_ATTR_2_RW(in0_max, voltage, MAX, 0);
1081 static SENSOR_DEVICE_ATTR_2_RW(in0_min, voltage, MIN, 0);
1082 static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, voltage, ALARM, 0);
1083 static SENSOR_DEVICE_ATTR_2_RO(in1_input, voltage, INPUT, 1);
1084 static SENSOR_DEVICE_ATTR_2_RW(in1_max, voltage, MAX, 1);
1085 static SENSOR_DEVICE_ATTR_2_RW(in1_min, voltage, MIN, 1);
1086 static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, voltage, ALARM, 1);
1087 static SENSOR_DEVICE_ATTR_2_RO(in2_input, voltage, INPUT, 2);
1088 static SENSOR_DEVICE_ATTR_2_RW(in2_max, voltage, MAX, 2);
1089 static SENSOR_DEVICE_ATTR_2_RW(in2_min, voltage, MIN, 2);
1090 static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, voltage, ALARM, 2);
1091 static SENSOR_DEVICE_ATTR_2_RO(in3_input, voltage, INPUT, 3);
1092 static SENSOR_DEVICE_ATTR_2_RW(in3_max, voltage, MAX, 3);
1093 static SENSOR_DEVICE_ATTR_2_RW(in3_min, voltage, MIN, 3);
1094 static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, voltage, ALARM, 3);
1095 static SENSOR_DEVICE_ATTR_2_RO(in4_input, voltage, INPUT, 4);
1096 static SENSOR_DEVICE_ATTR_2_RW(in4_max, voltage, MAX, 4);
1097 static SENSOR_DEVICE_ATTR_2_RW(in4_min, voltage, MIN, 4);
1098 static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, voltage, ALARM, 8);
1099 static SENSOR_DEVICE_ATTR_2_RO(in5_input, voltage, INPUT, 5);
1100 static SENSOR_DEVICE_ATTR_2_RW(in5_max, voltage, MAX, 5);
1101 static SENSOR_DEVICE_ATTR_2_RW(in5_min, voltage, MIN, 5);
1102 static SENSOR_DEVICE_ATTR_2_RO(in5_alarm, voltage, ALARM, 31);
1103 static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, INPUT, 0);
1104 static SENSOR_DEVICE_ATTR_2_RO(temp1_alarm, temp, ALARM, 0);
1105 static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, temp, FAULT, 0);
1106 static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, MAX, 0);
1107 static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, MIN, 0);
1108 static SENSOR_DEVICE_ATTR_2_RW(temp1_offset, temp, OFFSET, 0);
1109 static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point1_temp, temp, AUTOMIN, 0);
1110 static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point2_temp, point2, 0, 0);
1111 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, THERM, 0);
1112 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit_hyst, temp, HYSTERSIS, 0);
1113 static SENSOR_DEVICE_ATTR_2_RW(temp1_smoothing, temp_st, 0, 0);
1114 static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, INPUT, 1);
1115 static SENSOR_DEVICE_ATTR_2_RO(temp2_alarm, temp, ALARM, 1);
1116 static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, MAX, 1);
1117 static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, MIN, 1);
1118 static SENSOR_DEVICE_ATTR_2_RW(temp2_offset, temp, OFFSET, 1);
1119 static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point1_temp, temp, AUTOMIN, 1);
1120 static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point2_temp, point2, 0, 1);
1121 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, THERM, 1);
1122 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit_hyst, temp, HYSTERSIS, 1);
1123 static SENSOR_DEVICE_ATTR_2_RW(temp2_smoothing, temp_st, 0, 1);
1124 static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, INPUT, 2);
1125 static SENSOR_DEVICE_ATTR_2_RO(temp3_alarm, temp, ALARM, 2);
1126 static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, temp, FAULT, 2);
1127 static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, MAX, 2);
1128 static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, MIN, 2);
1129 static SENSOR_DEVICE_ATTR_2_RW(temp3_offset, temp, OFFSET, 2);
1130 static SENSOR_DEVICE_ATTR_2_RW(temp3_auto_point1_temp, temp, AUTOMIN, 2);
1131 static SENSOR_DEVICE_ATTR_2_RW(temp3_auto_point2_temp, point2, 0, 2);
1132 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, THERM, 2);
1133 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit_hyst, temp, HYSTERSIS, 2);
1134 static SENSOR_DEVICE_ATTR_2_RW(temp3_smoothing, temp_st, 0, 2);
1135 static SENSOR_DEVICE_ATTR_2_RO(fan1_input, tach, INPUT, 0);
1136 static SENSOR_DEVICE_ATTR_2_RW(fan1_min, tach, MIN, 0);
1137 static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, tach, ALARM, 0);
1138 static SENSOR_DEVICE_ATTR_2_RO(fan2_input, tach, INPUT, 1);
1139 static SENSOR_DEVICE_ATTR_2_RW(fan2_min, tach, MIN, 1);
1140 static SENSOR_DEVICE_ATTR_2_RO(fan2_alarm, tach, ALARM, 1);
1141 static SENSOR_DEVICE_ATTR_2_RO(fan3_input, tach, INPUT, 2);
1142 static SENSOR_DEVICE_ATTR_2_RW(fan3_min, tach, MIN, 2);
1143 static SENSOR_DEVICE_ATTR_2_RO(fan3_alarm, tach, ALARM, 2);
1144 static SENSOR_DEVICE_ATTR_2_RO(fan4_input, tach, INPUT, 3);
1145 static SENSOR_DEVICE_ATTR_2_RW(fan4_min, tach, MIN, 3);
1146 static SENSOR_DEVICE_ATTR_2_RO(fan4_alarm, tach, ALARM, 3);
1147 static SENSOR_DEVICE_ATTR_2_RW(pwm1, pwm, INPUT, 0);
1148 static SENSOR_DEVICE_ATTR_2_RW(pwm1_freq, pwmfreq, INPUT, 0);
1149 static SENSOR_DEVICE_ATTR_2_RW(pwm1_enable, pwmctrl, INPUT, 0);
1150 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_channels_temp, pwmchan, INPUT, 0);
1151 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_pwm, pwm, MIN, 0);
1152 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_pwm, pwm, MAX, 0);
1153 static SENSOR_DEVICE_ATTR_2_RW(pwm1_stall_disable, stall_disable, 0, 0);
1154 static SENSOR_DEVICE_ATTR_2_RW(pwm2, pwm, INPUT, 1);
1155 static SENSOR_DEVICE_ATTR_2_RW(pwm2_freq, pwmfreq, INPUT, 1);
1156 static SENSOR_DEVICE_ATTR_2_RW(pwm2_enable, pwmctrl, INPUT, 1);
1157 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_channels_temp, pwmchan, INPUT, 1);
1158 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_pwm, pwm, MIN, 1);
1159 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_pwm, pwm, MAX, 1);
1160 static SENSOR_DEVICE_ATTR_2_RW(pwm2_stall_disable, stall_disable, 0, 1);
1161 static SENSOR_DEVICE_ATTR_2_RW(pwm3, pwm, INPUT, 2);
1162 static SENSOR_DEVICE_ATTR_2_RW(pwm3_freq, pwmfreq, INPUT, 2);
1163 static SENSOR_DEVICE_ATTR_2_RW(pwm3_enable, pwmctrl, INPUT, 2);
1164 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_channels_temp, pwmchan, INPUT, 2);
1165 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point1_pwm, pwm, MIN, 2);
1166 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point2_pwm, pwm, MAX, 2);
1167 static SENSOR_DEVICE_ATTR_2_RW(pwm3_stall_disable, stall_disable, 0, 2);
1168
1169 /* Non-standard name, might need revisiting */
1170 static DEVICE_ATTR_RW(pwm_use_point2_pwm_at_crit);
1171
1172 static DEVICE_ATTR_RW(vrm);
1173 static DEVICE_ATTR_RO(cpu0_vid);
1174
1175 static struct attribute *adt7475_attrs[] = {
1176 &sensor_dev_attr_in1_input.dev_attr.attr,
1177 &sensor_dev_attr_in1_max.dev_attr.attr,
1178 &sensor_dev_attr_in1_min.dev_attr.attr,
1179 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1180 &sensor_dev_attr_in2_input.dev_attr.attr,
1181 &sensor_dev_attr_in2_max.dev_attr.attr,
1182 &sensor_dev_attr_in2_min.dev_attr.attr,
1183 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1184 &sensor_dev_attr_temp1_input.dev_attr.attr,
1185 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1186 &sensor_dev_attr_temp1_fault.dev_attr.attr,
1187 &sensor_dev_attr_temp1_max.dev_attr.attr,
1188 &sensor_dev_attr_temp1_min.dev_attr.attr,
1189 &sensor_dev_attr_temp1_offset.dev_attr.attr,
1190 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1191 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1192 &sensor_dev_attr_temp1_crit.dev_attr.attr,
1193 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
1194 &sensor_dev_attr_temp1_smoothing.dev_attr.attr,
1195 &sensor_dev_attr_temp2_input.dev_attr.attr,
1196 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1197 &sensor_dev_attr_temp2_max.dev_attr.attr,
1198 &sensor_dev_attr_temp2_min.dev_attr.attr,
1199 &sensor_dev_attr_temp2_offset.dev_attr.attr,
1200 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1201 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1202 &sensor_dev_attr_temp2_crit.dev_attr.attr,
1203 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
1204 &sensor_dev_attr_temp2_smoothing.dev_attr.attr,
1205 &sensor_dev_attr_temp3_input.dev_attr.attr,
1206 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1207 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1208 &sensor_dev_attr_temp3_max.dev_attr.attr,
1209 &sensor_dev_attr_temp3_min.dev_attr.attr,
1210 &sensor_dev_attr_temp3_offset.dev_attr.attr,
1211 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1212 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1213 &sensor_dev_attr_temp3_crit.dev_attr.attr,
1214 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1215 &sensor_dev_attr_temp3_smoothing.dev_attr.attr,
1216 &sensor_dev_attr_fan1_input.dev_attr.attr,
1217 &sensor_dev_attr_fan1_min.dev_attr.attr,
1218 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1219 &sensor_dev_attr_fan2_input.dev_attr.attr,
1220 &sensor_dev_attr_fan2_min.dev_attr.attr,
1221 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1222 &sensor_dev_attr_fan3_input.dev_attr.attr,
1223 &sensor_dev_attr_fan3_min.dev_attr.attr,
1224 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1225 &sensor_dev_attr_pwm1.dev_attr.attr,
1226 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1227 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1228 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1229 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1230 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1231 &sensor_dev_attr_pwm1_stall_disable.dev_attr.attr,
1232 &sensor_dev_attr_pwm3.dev_attr.attr,
1233 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1234 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1235 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1236 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1237 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1238 &sensor_dev_attr_pwm3_stall_disable.dev_attr.attr,
1239 &dev_attr_pwm_use_point2_pwm_at_crit.attr,
1240 NULL,
1241 };
1242
1243 static struct attribute *fan4_attrs[] = {
1244 &sensor_dev_attr_fan4_input.dev_attr.attr,
1245 &sensor_dev_attr_fan4_min.dev_attr.attr,
1246 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1247 NULL
1248 };
1249
1250 static struct attribute *pwm2_attrs[] = {
1251 &sensor_dev_attr_pwm2.dev_attr.attr,
1252 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1253 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1254 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1255 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1256 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1257 &sensor_dev_attr_pwm2_stall_disable.dev_attr.attr,
1258 NULL
1259 };
1260
1261 static struct attribute *in0_attrs[] = {
1262 &sensor_dev_attr_in0_input.dev_attr.attr,
1263 &sensor_dev_attr_in0_max.dev_attr.attr,
1264 &sensor_dev_attr_in0_min.dev_attr.attr,
1265 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1266 NULL
1267 };
1268
1269 static struct attribute *in3_attrs[] = {
1270 &sensor_dev_attr_in3_input.dev_attr.attr,
1271 &sensor_dev_attr_in3_max.dev_attr.attr,
1272 &sensor_dev_attr_in3_min.dev_attr.attr,
1273 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1274 NULL
1275 };
1276
1277 static struct attribute *in4_attrs[] = {
1278 &sensor_dev_attr_in4_input.dev_attr.attr,
1279 &sensor_dev_attr_in4_max.dev_attr.attr,
1280 &sensor_dev_attr_in4_min.dev_attr.attr,
1281 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1282 NULL
1283 };
1284
1285 static struct attribute *in5_attrs[] = {
1286 &sensor_dev_attr_in5_input.dev_attr.attr,
1287 &sensor_dev_attr_in5_max.dev_attr.attr,
1288 &sensor_dev_attr_in5_min.dev_attr.attr,
1289 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1290 NULL
1291 };
1292
1293 static struct attribute *vid_attrs[] = {
1294 &dev_attr_cpu0_vid.attr,
1295 &dev_attr_vrm.attr,
1296 NULL
1297 };
1298
1299 static const struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs };
1300 static const struct attribute_group fan4_attr_group = { .attrs = fan4_attrs };
1301 static const struct attribute_group pwm2_attr_group = { .attrs = pwm2_attrs };
1302 static const struct attribute_group in0_attr_group = { .attrs = in0_attrs };
1303 static const struct attribute_group in3_attr_group = { .attrs = in3_attrs };
1304 static const struct attribute_group in4_attr_group = { .attrs = in4_attrs };
1305 static const struct attribute_group in5_attr_group = { .attrs = in5_attrs };
1306 static const struct attribute_group vid_attr_group = { .attrs = vid_attrs };
1307
1308 static int adt7475_detect(struct i2c_client *client,
1309 struct i2c_board_info *info)
1310 {
1311 struct i2c_adapter *adapter = client->adapter;
1312 int vendid, devid, devid2;
1313 const char *name;
1314
1315 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1316 return -ENODEV;
1317
1318 vendid = adt7475_read(REG_VENDID);
1319 devid2 = adt7475_read(REG_DEVID2);
1320 if (vendid != 0x41 || /* Analog Devices */
1321 (devid2 & 0xf8) != 0x68)
1322 return -ENODEV;
1323
1324 devid = adt7475_read(REG_DEVID);
1325 if (devid == 0x73)
1326 name = "adt7473";
1327 else if (devid == 0x75 && client->addr == 0x2e)
1328 name = "adt7475";
1329 else if (devid == 0x76)
1330 name = "adt7476";
1331 else if ((devid2 & 0xfc) == 0x6c)
1332 name = "adt7490";
1333 else {
1334 dev_dbg(&adapter->dev,
1335 "Couldn't detect an ADT7473/75/76/90 part at "
1336 "0x%02x\n", (unsigned int)client->addr);
1337 return -ENODEV;
1338 }
1339
1340 strlcpy(info->type, name, I2C_NAME_SIZE);
1341
1342 return 0;
1343 }
1344
1345 static int adt7475_update_limits(struct i2c_client *client)
1346 {
1347 struct adt7475_data *data = i2c_get_clientdata(client);
1348 int i;
1349 int ret;
1350
1351 ret = adt7475_read(REG_CONFIG4);
1352 if (ret < 0)
1353 return ret;
1354 data->config4 = ret;
1355
1356 ret = adt7475_read(REG_CONFIG5);
1357 if (ret < 0)
1358 return ret;
1359 data->config5 = ret;
1360
1361 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1362 if (!(data->has_voltage & (1 << i)))
1363 continue;
1364 /* Adjust values so they match the input precision */
1365 ret = adt7475_read(VOLTAGE_MIN_REG(i));
1366 if (ret < 0)
1367 return ret;
1368 data->voltage[MIN][i] = ret << 2;
1369
1370 ret = adt7475_read(VOLTAGE_MAX_REG(i));
1371 if (ret < 0)
1372 return ret;
1373 data->voltage[MAX][i] = ret << 2;
1374 }
1375
1376 if (data->has_voltage & (1 << 5)) {
1377 ret = adt7475_read(REG_VTT_MIN);
1378 if (ret < 0)
1379 return ret;
1380 data->voltage[MIN][5] = ret << 2;
1381
1382 ret = adt7475_read(REG_VTT_MAX);
1383 if (ret < 0)
1384 return ret;
1385 data->voltage[MAX][5] = ret << 2;
1386 }
1387
1388 for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1389 /* Adjust values so they match the input precision */
1390 ret = adt7475_read(TEMP_MIN_REG(i));
1391 if (ret < 0)
1392 return ret;
1393 data->temp[MIN][i] = ret << 2;
1394
1395 ret = adt7475_read(TEMP_MAX_REG(i));
1396 if (ret < 0)
1397 return ret;
1398 data->temp[MAX][i] = ret << 2;
1399
1400 ret = adt7475_read(TEMP_TMIN_REG(i));
1401 if (ret < 0)
1402 return ret;
1403 data->temp[AUTOMIN][i] = ret << 2;
1404
1405 ret = adt7475_read(TEMP_THERM_REG(i));
1406 if (ret < 0)
1407 return ret;
1408 data->temp[THERM][i] = ret << 2;
1409
1410 ret = adt7475_read(TEMP_OFFSET_REG(i));
1411 if (ret < 0)
1412 return ret;
1413 data->temp[OFFSET][i] = ret;
1414 }
1415 adt7475_read_hystersis(client);
1416
1417 for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1418 if (i == 3 && !data->has_fan4)
1419 continue;
1420 ret = adt7475_read_word(client, TACH_MIN_REG(i));
1421 if (ret < 0)
1422 return ret;
1423 data->tach[MIN][i] = ret;
1424 }
1425
1426 for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1427 if (i == 1 && !data->has_pwm2)
1428 continue;
1429 ret = adt7475_read(PWM_MAX_REG(i));
1430 if (ret < 0)
1431 return ret;
1432 data->pwm[MAX][i] = ret;
1433
1434 ret = adt7475_read(PWM_MIN_REG(i));
1435 if (ret < 0)
1436 return ret;
1437 data->pwm[MIN][i] = ret;
1438 /* Set the channel and control information */
1439 adt7475_read_pwm(client, i);
1440 }
1441
1442 ret = adt7475_read(TEMP_TRANGE_REG(0));
1443 if (ret < 0)
1444 return ret;
1445 data->range[0] = ret;
1446
1447 ret = adt7475_read(TEMP_TRANGE_REG(1));
1448 if (ret < 0)
1449 return ret;
1450 data->range[1] = ret;
1451
1452 ret = adt7475_read(TEMP_TRANGE_REG(2));
1453 if (ret < 0)
1454 return ret;
1455 data->range[2] = ret;
1456
1457 return 0;
1458 }
1459
1460 static int adt7475_probe(struct i2c_client *client,
1461 const struct i2c_device_id *id)
1462 {
1463 enum chips chip;
1464 static const char * const names[] = {
1465 [adt7473] = "ADT7473",
1466 [adt7475] = "ADT7475",
1467 [adt7476] = "ADT7476",
1468 [adt7490] = "ADT7490",
1469 };
1470
1471 struct adt7475_data *data;
1472 struct device *hwmon_dev;
1473 int i, ret = 0, revision, group_num = 0;
1474 u8 config2, config3;
1475
1476 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
1477 if (data == NULL)
1478 return -ENOMEM;
1479
1480 mutex_init(&data->lock);
1481 data->client = client;
1482 i2c_set_clientdata(client, data);
1483
1484 if (client->dev.of_node)
1485 chip = (enum chips)of_device_get_match_data(&client->dev);
1486 else
1487 chip = id->driver_data;
1488
1489 /* Initialize device-specific values */
1490 switch (chip) {
1491 case adt7476:
1492 data->has_voltage = 0x0e; /* in1 to in3 */
1493 revision = adt7475_read(REG_DEVID2) & 0x07;
1494 break;
1495 case adt7490:
1496 data->has_voltage = 0x3e; /* in1 to in5 */
1497 revision = adt7475_read(REG_DEVID2) & 0x03;
1498 if (revision == 0x03)
1499 revision += adt7475_read(REG_DEVREV2);
1500 break;
1501 default:
1502 data->has_voltage = 0x06; /* in1, in2 */
1503 revision = adt7475_read(REG_DEVID2) & 0x07;
1504 }
1505
1506 config3 = adt7475_read(REG_CONFIG3);
1507 /* Pin PWM2 may alternatively be used for ALERT output */
1508 if (!(config3 & CONFIG3_SMBALERT))
1509 data->has_pwm2 = 1;
1510 /* Meaning of this bit is inverted for the ADT7473-1 */
1511 if (id->driver_data == adt7473 && revision >= 1)
1512 data->has_pwm2 = !data->has_pwm2;
1513
1514 data->config4 = adt7475_read(REG_CONFIG4);
1515 /* Pin TACH4 may alternatively be used for THERM */
1516 if ((data->config4 & CONFIG4_PINFUNC) == 0x0)
1517 data->has_fan4 = 1;
1518
1519 /*
1520 * THERM configuration is more complex on the ADT7476 and ADT7490,
1521 * because 2 different pins (TACH4 and +2.5 Vin) can be used for
1522 * this function
1523 */
1524 if (id->driver_data == adt7490) {
1525 if ((data->config4 & CONFIG4_PINFUNC) == 0x1 &&
1526 !(config3 & CONFIG3_THERM))
1527 data->has_fan4 = 1;
1528 }
1529 if (id->driver_data == adt7476 || id->driver_data == adt7490) {
1530 if (!(config3 & CONFIG3_THERM) ||
1531 (data->config4 & CONFIG4_PINFUNC) == 0x1)
1532 data->has_voltage |= (1 << 0); /* in0 */
1533 }
1534
1535 /*
1536 * On the ADT7476, the +12V input pin may instead be used as VID5,
1537 * and VID pins may alternatively be used as GPIO
1538 */
1539 if (id->driver_data == adt7476) {
1540 u8 vid = adt7475_read(REG_VID);
1541 if (!(vid & VID_VIDSEL))
1542 data->has_voltage |= (1 << 4); /* in4 */
1543
1544 data->has_vid = !(adt7475_read(REG_CONFIG5) & CONFIG5_VIDGPIO);
1545 }
1546
1547 /* Voltage attenuators can be bypassed, globally or individually */
1548 config2 = adt7475_read(REG_CONFIG2);
1549 if (config2 & CONFIG2_ATTN) {
1550 data->bypass_attn = (0x3 << 3) | 0x3;
1551 } else {
1552 data->bypass_attn = ((data->config4 & CONFIG4_ATTN_IN10) >> 4) |
1553 ((data->config4 & CONFIG4_ATTN_IN43) >> 3);
1554 }
1555 data->bypass_attn &= data->has_voltage;
1556
1557 /*
1558 * Call adt7475_read_pwm for all pwm's as this will reprogram any
1559 * pwm's which are disabled to manual mode with 0% duty cycle
1560 */
1561 for (i = 0; i < ADT7475_PWM_COUNT; i++)
1562 adt7475_read_pwm(client, i);
1563
1564 /* Start monitoring */
1565 switch (chip) {
1566 case adt7475:
1567 case adt7476:
1568 i2c_smbus_write_byte_data(client, REG_CONFIG1,
1569 adt7475_read(REG_CONFIG1) | 0x01);
1570 break;
1571 default:
1572 break;
1573 }
1574
1575 data->groups[group_num++] = &adt7475_attr_group;
1576
1577 /* Features that can be disabled individually */
1578 if (data->has_fan4) {
1579 data->groups[group_num++] = &fan4_attr_group;
1580 }
1581 if (data->has_pwm2) {
1582 data->groups[group_num++] = &pwm2_attr_group;
1583 }
1584 if (data->has_voltage & (1 << 0)) {
1585 data->groups[group_num++] = &in0_attr_group;
1586 }
1587 if (data->has_voltage & (1 << 3)) {
1588 data->groups[group_num++] = &in3_attr_group;
1589 }
1590 if (data->has_voltage & (1 << 4)) {
1591 data->groups[group_num++] = &in4_attr_group;
1592 }
1593 if (data->has_voltage & (1 << 5)) {
1594 data->groups[group_num++] = &in5_attr_group;
1595 }
1596 if (data->has_vid) {
1597 data->vrm = vid_which_vrm();
1598 data->groups[group_num] = &vid_attr_group;
1599 }
1600
1601 /* register device with all the acquired attributes */
1602 hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
1603 client->name, data,
1604 data->groups);
1605
1606 if (IS_ERR(hwmon_dev)) {
1607 ret = PTR_ERR(hwmon_dev);
1608 return ret;
1609 }
1610
1611 dev_info(&client->dev, "%s device, revision %d\n",
1612 names[id->driver_data], revision);
1613 if ((data->has_voltage & 0x11) || data->has_fan4 || data->has_pwm2)
1614 dev_info(&client->dev, "Optional features:%s%s%s%s%s\n",
1615 (data->has_voltage & (1 << 0)) ? " in0" : "",
1616 (data->has_voltage & (1 << 4)) ? " in4" : "",
1617 data->has_fan4 ? " fan4" : "",
1618 data->has_pwm2 ? " pwm2" : "",
1619 data->has_vid ? " vid" : "");
1620 if (data->bypass_attn)
1621 dev_info(&client->dev, "Bypassing attenuators on:%s%s%s%s\n",
1622 (data->bypass_attn & (1 << 0)) ? " in0" : "",
1623 (data->bypass_attn & (1 << 1)) ? " in1" : "",
1624 (data->bypass_attn & (1 << 3)) ? " in3" : "",
1625 (data->bypass_attn & (1 << 4)) ? " in4" : "");
1626
1627 /* Limits and settings, should never change update more than once */
1628 ret = adt7475_update_limits(client);
1629 if (ret)
1630 return ret;
1631
1632 return 0;
1633 }
1634
1635 static struct i2c_driver adt7475_driver = {
1636 .class = I2C_CLASS_HWMON,
1637 .driver = {
1638 .name = "adt7475",
1639 .of_match_table = of_match_ptr(adt7475_of_match),
1640 },
1641 .probe = adt7475_probe,
1642 .id_table = adt7475_id,
1643 .detect = adt7475_detect,
1644 .address_list = normal_i2c,
1645 };
1646
1647 static void adt7475_read_hystersis(struct i2c_client *client)
1648 {
1649 struct adt7475_data *data = i2c_get_clientdata(client);
1650
1651 data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS);
1652 data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0];
1653 data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS);
1654 }
1655
1656 static void adt7475_read_pwm(struct i2c_client *client, int index)
1657 {
1658 struct adt7475_data *data = i2c_get_clientdata(client);
1659 unsigned int v;
1660
1661 data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index));
1662
1663 /*
1664 * Figure out the internal value for pwmctrl and pwmchan
1665 * based on the current settings
1666 */
1667 v = (data->pwm[CONTROL][index] >> 5) & 7;
1668
1669 if (v == 3)
1670 data->pwmctl[index] = 0;
1671 else if (v == 7)
1672 data->pwmctl[index] = 1;
1673 else if (v == 4) {
1674 /*
1675 * The fan is disabled - we don't want to
1676 * support that, so change to manual mode and
1677 * set the duty cycle to 0 instead
1678 */
1679 data->pwm[INPUT][index] = 0;
1680 data->pwm[CONTROL][index] &= ~0xE0;
1681 data->pwm[CONTROL][index] |= (7 << 5);
1682
1683 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1684 data->pwm[INPUT][index]);
1685
1686 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1687 data->pwm[CONTROL][index]);
1688
1689 data->pwmctl[index] = 1;
1690 } else {
1691 data->pwmctl[index] = 2;
1692
1693 switch (v) {
1694 case 0:
1695 data->pwmchan[index] = 1;
1696 break;
1697 case 1:
1698 data->pwmchan[index] = 2;
1699 break;
1700 case 2:
1701 data->pwmchan[index] = 4;
1702 break;
1703 case 5:
1704 data->pwmchan[index] = 6;
1705 break;
1706 case 6:
1707 data->pwmchan[index] = 7;
1708 break;
1709 }
1710 }
1711 }
1712
1713 static int adt7475_update_measure(struct device *dev)
1714 {
1715 struct adt7475_data *data = dev_get_drvdata(dev);
1716 struct i2c_client *client = data->client;
1717 u16 ext;
1718 int i;
1719 int ret;
1720
1721 ret = adt7475_read(REG_STATUS2);
1722 if (ret < 0)
1723 return ret;
1724 data->alarms = ret << 8;
1725
1726 ret = adt7475_read(REG_STATUS1);
1727 if (ret < 0)
1728 return ret;
1729 data->alarms |= ret;
1730
1731 ret = adt7475_read(REG_EXTEND2);
1732 if (ret < 0)
1733 return ret;
1734
1735 ext = (ret << 8);
1736
1737 ret = adt7475_read(REG_EXTEND1);
1738 if (ret < 0)
1739 return ret;
1740
1741 ext |= ret;
1742
1743 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1744 if (!(data->has_voltage & (1 << i)))
1745 continue;
1746 ret = adt7475_read(VOLTAGE_REG(i));
1747 if (ret < 0)
1748 return ret;
1749 data->voltage[INPUT][i] =
1750 (ret << 2) |
1751 ((ext >> (i * 2)) & 3);
1752 }
1753
1754 for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1755 ret = adt7475_read(TEMP_REG(i));
1756 if (ret < 0)
1757 return ret;
1758 data->temp[INPUT][i] =
1759 (ret << 2) |
1760 ((ext >> ((i + 5) * 2)) & 3);
1761 }
1762
1763 if (data->has_voltage & (1 << 5)) {
1764 ret = adt7475_read(REG_STATUS4);
1765 if (ret < 0)
1766 return ret;
1767 data->alarms |= ret << 24;
1768
1769 ret = adt7475_read(REG_EXTEND3);
1770 if (ret < 0)
1771 return ret;
1772 ext = ret;
1773
1774 ret = adt7475_read(REG_VTT);
1775 if (ret < 0)
1776 return ret;
1777 data->voltage[INPUT][5] = ret << 2 |
1778 ((ext >> 4) & 3);
1779 }
1780
1781 for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1782 if (i == 3 && !data->has_fan4)
1783 continue;
1784 ret = adt7475_read_word(client, TACH_REG(i));
1785 if (ret < 0)
1786 return ret;
1787 data->tach[INPUT][i] = ret;
1788 }
1789
1790 /* Updated by hw when in auto mode */
1791 for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1792 if (i == 1 && !data->has_pwm2)
1793 continue;
1794 ret = adt7475_read(PWM_REG(i));
1795 if (ret < 0)
1796 return ret;
1797 data->pwm[INPUT][i] = ret;
1798 }
1799
1800 if (data->has_vid) {
1801 ret = adt7475_read(REG_VID);
1802 if (ret < 0)
1803 return ret;
1804 data->vid = ret & 0x3f;
1805 }
1806
1807 return 0;
1808 }
1809
1810 static struct adt7475_data *adt7475_update_device(struct device *dev)
1811 {
1812 struct adt7475_data *data = dev_get_drvdata(dev);
1813 int ret;
1814
1815 mutex_lock(&data->lock);
1816
1817 /* Measurement values update every 2 seconds */
1818 if (time_after(jiffies, data->measure_updated + HZ * 2) ||
1819 !data->valid) {
1820 ret = adt7475_update_measure(dev);
1821 if (ret) {
1822 data->valid = false;
1823 mutex_unlock(&data->lock);
1824 return ERR_PTR(ret);
1825 }
1826 data->measure_updated = jiffies;
1827 data->valid = true;
1828 }
1829
1830 mutex_unlock(&data->lock);
1831
1832 return data;
1833 }
1834
1835 module_i2c_driver(adt7475_driver);
1836
1837 MODULE_AUTHOR("Advanced Micro Devices, Inc");
1838 MODULE_DESCRIPTION("adt7475 driver");
1839 MODULE_LICENSE("GPL");
Ubuntu Hirsute Linux kernel mirror