forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
adt7462.c
1832 lines (1598 loc) · 53 KB
/
adt7462.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* A hwmon driver for the Analog Devices ADT7462
* Copyright (C) 2008 IBM
*
* Author: Darrick J. Wong <[email protected]>
*/
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/log2.h>
#include <linux/slab.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x58, 0x5C, I2C_CLIENT_END };
/* ADT7462 registers */
#define ADT7462_REG_DEVICE 0x3D
#define ADT7462_REG_VENDOR 0x3E
#define ADT7462_REG_REVISION 0x3F
#define ADT7462_REG_MIN_TEMP_BASE_ADDR 0x44
#define ADT7462_REG_MIN_TEMP_MAX_ADDR 0x47
#define ADT7462_REG_MAX_TEMP_BASE_ADDR 0x48
#define ADT7462_REG_MAX_TEMP_MAX_ADDR 0x4B
#define ADT7462_REG_TEMP_BASE_ADDR 0x88
#define ADT7462_REG_TEMP_MAX_ADDR 0x8F
#define ADT7462_REG_FAN_BASE_ADDR 0x98
#define ADT7462_REG_FAN_MAX_ADDR 0x9F
#define ADT7462_REG_FAN2_BASE_ADDR 0xA2
#define ADT7462_REG_FAN2_MAX_ADDR 0xA9
#define ADT7462_REG_FAN_ENABLE 0x07
#define ADT7462_REG_FAN_MIN_BASE_ADDR 0x78
#define ADT7462_REG_FAN_MIN_MAX_ADDR 0x7F
#define ADT7462_REG_CFG2 0x02
#define ADT7462_FSPD_MASK 0x20
#define ADT7462_REG_PWM_BASE_ADDR 0xAA
#define ADT7462_REG_PWM_MAX_ADDR 0xAD
#define ADT7462_REG_PWM_MIN_BASE_ADDR 0x28
#define ADT7462_REG_PWM_MIN_MAX_ADDR 0x2B
#define ADT7462_REG_PWM_MAX 0x2C
#define ADT7462_REG_PWM_TEMP_MIN_BASE_ADDR 0x5C
#define ADT7462_REG_PWM_TEMP_MIN_MAX_ADDR 0x5F
#define ADT7462_REG_PWM_TEMP_RANGE_BASE_ADDR 0x60
#define ADT7462_REG_PWM_TEMP_RANGE_MAX_ADDR 0x63
#define ADT7462_PWM_HYST_MASK 0x0F
#define ADT7462_PWM_RANGE_MASK 0xF0
#define ADT7462_PWM_RANGE_SHIFT 4
#define ADT7462_REG_PWM_CFG_BASE_ADDR 0x21
#define ADT7462_REG_PWM_CFG_MAX_ADDR 0x24
#define ADT7462_PWM_CHANNEL_MASK 0xE0
#define ADT7462_PWM_CHANNEL_SHIFT 5
#define ADT7462_REG_PIN_CFG_BASE_ADDR 0x10
#define ADT7462_REG_PIN_CFG_MAX_ADDR 0x13
#define ADT7462_PIN7_INPUT 0x01 /* cfg0 */
#define ADT7462_DIODE3_INPUT 0x20
#define ADT7462_DIODE1_INPUT 0x40
#define ADT7462_VID_INPUT 0x80
#define ADT7462_PIN22_INPUT 0x04 /* cfg1 */
#define ADT7462_PIN21_INPUT 0x08
#define ADT7462_PIN19_INPUT 0x10
#define ADT7462_PIN15_INPUT 0x20
#define ADT7462_PIN13_INPUT 0x40
#define ADT7462_PIN8_INPUT 0x80
#define ADT7462_PIN23_MASK 0x03
#define ADT7462_PIN23_SHIFT 0
#define ADT7462_PIN26_MASK 0x0C /* cfg2 */
#define ADT7462_PIN26_SHIFT 2
#define ADT7462_PIN25_MASK 0x30
#define ADT7462_PIN25_SHIFT 4
#define ADT7462_PIN24_MASK 0xC0
#define ADT7462_PIN24_SHIFT 6
#define ADT7462_PIN26_VOLT_INPUT 0x08
#define ADT7462_PIN25_VOLT_INPUT 0x20
#define ADT7462_PIN28_SHIFT 4 /* cfg3 */
#define ADT7462_PIN28_VOLT 0x5
#define ADT7462_REG_ALARM1 0xB8
#define ADT7462_LT_ALARM 0x02
#define ADT7462_R1T_ALARM 0x04
#define ADT7462_R2T_ALARM 0x08
#define ADT7462_R3T_ALARM 0x10
#define ADT7462_REG_ALARM2 0xBB
#define ADT7462_V0_ALARM 0x01
#define ADT7462_V1_ALARM 0x02
#define ADT7462_V2_ALARM 0x04
#define ADT7462_V3_ALARM 0x08
#define ADT7462_V4_ALARM 0x10
#define ADT7462_V5_ALARM 0x20
#define ADT7462_V6_ALARM 0x40
#define ADT7462_V7_ALARM 0x80
#define ADT7462_REG_ALARM3 0xBC
#define ADT7462_V8_ALARM 0x08
#define ADT7462_V9_ALARM 0x10
#define ADT7462_V10_ALARM 0x20
#define ADT7462_V11_ALARM 0x40
#define ADT7462_V12_ALARM 0x80
#define ADT7462_REG_ALARM4 0xBD
#define ADT7462_F0_ALARM 0x01
#define ADT7462_F1_ALARM 0x02
#define ADT7462_F2_ALARM 0x04
#define ADT7462_F3_ALARM 0x08
#define ADT7462_F4_ALARM 0x10
#define ADT7462_F5_ALARM 0x20
#define ADT7462_F6_ALARM 0x40
#define ADT7462_F7_ALARM 0x80
#define ADT7462_ALARM1 0x0000
#define ADT7462_ALARM2 0x0100
#define ADT7462_ALARM3 0x0200
#define ADT7462_ALARM4 0x0300
#define ADT7462_ALARM_REG_SHIFT 8
#define ADT7462_ALARM_FLAG_MASK 0x0F
#define ADT7462_TEMP_COUNT 4
#define ADT7462_TEMP_REG(x) (ADT7462_REG_TEMP_BASE_ADDR + ((x) * 2))
#define ADT7462_TEMP_MIN_REG(x) (ADT7462_REG_MIN_TEMP_BASE_ADDR + (x))
#define ADT7462_TEMP_MAX_REG(x) (ADT7462_REG_MAX_TEMP_BASE_ADDR + (x))
#define TEMP_FRAC_OFFSET 6
#define ADT7462_FAN_COUNT 8
#define ADT7462_REG_FAN_MIN(x) (ADT7462_REG_FAN_MIN_BASE_ADDR + (x))
#define ADT7462_PWM_COUNT 4
#define ADT7462_REG_PWM(x) (ADT7462_REG_PWM_BASE_ADDR + (x))
#define ADT7462_REG_PWM_MIN(x) (ADT7462_REG_PWM_MIN_BASE_ADDR + (x))
#define ADT7462_REG_PWM_TMIN(x) \
(ADT7462_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
#define ADT7462_REG_PWM_TRANGE(x) \
(ADT7462_REG_PWM_TEMP_RANGE_BASE_ADDR + (x))
#define ADT7462_PIN_CFG_REG_COUNT 4
#define ADT7462_REG_PIN_CFG(x) (ADT7462_REG_PIN_CFG_BASE_ADDR + (x))
#define ADT7462_REG_PWM_CFG(x) (ADT7462_REG_PWM_CFG_BASE_ADDR + (x))
#define ADT7462_ALARM_REG_COUNT 4
/*
* The chip can measure 13 different voltage sources:
*
* 1. +12V1 (pin 7)
* 2. Vccp1/+2.5V/+1.8V/+1.5V (pin 23)
* 3. +12V3 (pin 22)
* 4. +5V (pin 21)
* 5. +1.25V/+0.9V (pin 19)
* 6. +2.5V/+1.8V (pin 15)
* 7. +3.3v (pin 13)
* 8. +12V2 (pin 8)
* 9. Vbatt/FSB_Vtt (pin 26)
* A. +3.3V/+1.2V1 (pin 25)
* B. Vccp2/+2.5V/+1.8V/+1.5V (pin 24)
* C. +1.5V ICH (only if BOTH pin 28/29 are set to +1.5V)
* D. +1.5V 3GPIO (only if BOTH pin 28/29 are set to +1.5V)
*
* Each of these 13 has a factor to convert raw to voltage. Even better,
* the pins can be connected to other sensors (tach/gpio/hot/etc), which
* makes the bookkeeping tricky.
*
* Some, but not all, of these voltages have low/high limits.
*/
#define ADT7462_VOLT_COUNT 13
#define ADT7462_VENDOR 0x41
#define ADT7462_DEVICE 0x62
/* datasheet only mentions a revision 4 */
#define ADT7462_REVISION 0x04
/* How often do we reread sensors values? (In jiffies) */
#define SENSOR_REFRESH_INTERVAL (2 * HZ)
/* How often do we reread sensor limit values? (In jiffies) */
#define LIMIT_REFRESH_INTERVAL (60 * HZ)
/* datasheet says to divide this number by the fan reading to get fan rpm */
#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
#define FAN_PERIOD_INVALID 65535
#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
#define MASK_AND_SHIFT(value, prefix) \
(((value) & prefix##_MASK) >> prefix##_SHIFT)
struct adt7462_data {
struct i2c_client *client;
struct mutex lock;
char sensors_valid;
char limits_valid;
unsigned long sensors_last_updated; /* In jiffies */
unsigned long limits_last_updated; /* In jiffies */
u8 temp[ADT7462_TEMP_COUNT];
/* bits 6-7 are quarter pieces of temp */
u8 temp_frac[ADT7462_TEMP_COUNT];
u8 temp_min[ADT7462_TEMP_COUNT];
u8 temp_max[ADT7462_TEMP_COUNT];
u16 fan[ADT7462_FAN_COUNT];
u8 fan_enabled;
u8 fan_min[ADT7462_FAN_COUNT];
u8 cfg2;
u8 pwm[ADT7462_PWM_COUNT];
u8 pin_cfg[ADT7462_PIN_CFG_REG_COUNT];
u8 voltages[ADT7462_VOLT_COUNT];
u8 volt_max[ADT7462_VOLT_COUNT];
u8 volt_min[ADT7462_VOLT_COUNT];
u8 pwm_min[ADT7462_PWM_COUNT];
u8 pwm_tmin[ADT7462_PWM_COUNT];
u8 pwm_trange[ADT7462_PWM_COUNT];
u8 pwm_max; /* only one per chip */
u8 pwm_cfg[ADT7462_PWM_COUNT];
u8 alarms[ADT7462_ALARM_REG_COUNT];
};
/*
* 16-bit registers on the ADT7462 are low-byte first. The data sheet says
* that the low byte must be read before the high byte.
*/
static inline int adt7462_read_word_data(struct i2c_client *client, u8 reg)
{
u16 foo;
foo = i2c_smbus_read_byte_data(client, reg);
foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
return foo;
}
/* For some reason these registers are not contiguous. */
static int ADT7462_REG_FAN(int fan)
{
if (fan < 4)
return ADT7462_REG_FAN_BASE_ADDR + (2 * fan);
return ADT7462_REG_FAN2_BASE_ADDR + (2 * (fan - 4));
}
/* Voltage registers are scattered everywhere */
static int ADT7462_REG_VOLT_MAX(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return 0x7C;
break;
case 1:
return 0x69;
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return 0x7F;
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return 0x7E;
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT))
return 0x4B;
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT))
return 0x49;
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return 0x68;
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return 0x7D;
break;
case 8:
if (!(data->pin_cfg[2] & ADT7462_PIN26_VOLT_INPUT))
return 0x6C;
break;
case 9:
if (!(data->pin_cfg[2] & ADT7462_PIN25_VOLT_INPUT))
return 0x6B;
break;
case 10:
return 0x6A;
case 11:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x50;
break;
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x4C;
break;
}
return 0;
}
static int ADT7462_REG_VOLT_MIN(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return 0x6D;
break;
case 1:
return 0x72;
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return 0x6F;
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return 0x71;
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT))
return 0x47;
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT))
return 0x45;
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return 0x70;
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return 0x6E;
break;
case 8:
if (!(data->pin_cfg[2] & ADT7462_PIN26_VOLT_INPUT))
return 0x75;
break;
case 9:
if (!(data->pin_cfg[2] & ADT7462_PIN25_VOLT_INPUT))
return 0x74;
break;
case 10:
return 0x73;
case 11:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x76;
break;
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x77;
break;
}
return 0;
}
static int ADT7462_REG_VOLT(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return 0xA3;
break;
case 1:
return 0x90;
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return 0xA9;
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return 0xA7;
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT))
return 0x8F;
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT))
return 0x8B;
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return 0x96;
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return 0xA5;
break;
case 8:
if (!(data->pin_cfg[2] & ADT7462_PIN26_VOLT_INPUT))
return 0x93;
break;
case 9:
if (!(data->pin_cfg[2] & ADT7462_PIN25_VOLT_INPUT))
return 0x92;
break;
case 10:
return 0x91;
case 11:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x94;
break;
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x95;
break;
}
return 0;
}
/* Provide labels for sysfs */
static const char *voltage_label(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return "+12V1";
break;
case 1:
switch (MASK_AND_SHIFT(data->pin_cfg[1], ADT7462_PIN23)) {
case 0:
return "Vccp1";
case 1:
return "+2.5V";
case 2:
return "+1.8V";
case 3:
return "+1.5V";
}
fallthrough;
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return "+12V3";
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return "+5V";
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT)) {
if (data->pin_cfg[1] & ADT7462_PIN19_INPUT)
return "+0.9V";
return "+1.25V";
}
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT)) {
if (data->pin_cfg[1] & ADT7462_PIN19_INPUT)
return "+1.8V";
return "+2.5V";
}
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return "+3.3V";
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return "+12V2";
break;
case 8:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN26)) {
case 0:
return "Vbatt";
case 1:
return "FSB_Vtt";
}
break;
case 9:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN25)) {
case 0:
return "+3.3V";
case 1:
return "+1.2V1";
}
break;
case 10:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN24)) {
case 0:
return "Vccp2";
case 1:
return "+2.5V";
case 2:
return "+1.8V";
case 3:
return "+1.5";
}
fallthrough;
case 11:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return "+1.5V ICH";
break;
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return "+1.5V 3GPIO";
break;
}
return "N/A";
}
/* Multipliers are actually in uV, not mV. */
static int voltage_multiplier(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return 62500;
break;
case 1:
switch (MASK_AND_SHIFT(data->pin_cfg[1], ADT7462_PIN23)) {
case 0:
if (data->pin_cfg[0] & ADT7462_VID_INPUT)
return 12500;
return 6250;
case 1:
return 13000;
case 2:
return 9400;
case 3:
return 7800;
}
fallthrough;
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return 62500;
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return 26000;
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT)) {
if (data->pin_cfg[1] & ADT7462_PIN19_INPUT)
return 4690;
return 6500;
}
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT)) {
if (data->pin_cfg[1] & ADT7462_PIN15_INPUT)
return 9400;
return 13000;
}
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return 17200;
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return 62500;
break;
case 8:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN26)) {
case 0:
return 15600;
case 1:
return 6250;
}
break;
case 9:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN25)) {
case 0:
return 17200;
case 1:
return 6250;
}
break;
case 10:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN24)) {
case 0:
return 6250;
case 1:
return 13000;
case 2:
return 9400;
case 3:
return 7800;
}
fallthrough;
case 11:
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 7800;
}
return 0;
}
static int temp_enabled(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
case 2:
return 1;
case 1:
if (data->pin_cfg[0] & ADT7462_DIODE1_INPUT)
return 1;
break;
case 3:
if (data->pin_cfg[0] & ADT7462_DIODE3_INPUT)
return 1;
break;
}
return 0;
}
static const char *temp_label(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
return "local";
case 1:
if (data->pin_cfg[0] & ADT7462_DIODE1_INPUT)
return "remote1";
break;
case 2:
return "remote2";
case 3:
if (data->pin_cfg[0] & ADT7462_DIODE3_INPUT)
return "remote3";
break;
}
return "N/A";
}
/* Map Trange register values to mC */
#define NUM_TRANGE_VALUES 16
static const int trange_values[NUM_TRANGE_VALUES] = {
2000,
2500,
3300,
4000,
5000,
6700,
8000,
10000,
13300,
16000,
20000,
26700,
32000,
40000,
53300,
80000
};
static int find_trange_value(int trange)
{
int i;
for (i = 0; i < NUM_TRANGE_VALUES; i++)
if (trange_values[i] == trange)
return i;
return -EINVAL;
}
static struct adt7462_data *adt7462_update_device(struct device *dev)
{
struct adt7462_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long local_jiffies = jiffies;
int i;
mutex_lock(&data->lock);
if (time_before(local_jiffies, data->sensors_last_updated +
SENSOR_REFRESH_INTERVAL)
&& data->sensors_valid)
goto no_sensor_update;
for (i = 0; i < ADT7462_TEMP_COUNT; i++) {
/*
* Reading the fractional register locks the integral
* register until both have been read.
*/
data->temp_frac[i] = i2c_smbus_read_byte_data(client,
ADT7462_TEMP_REG(i));
data->temp[i] = i2c_smbus_read_byte_data(client,
ADT7462_TEMP_REG(i) + 1);
}
for (i = 0; i < ADT7462_FAN_COUNT; i++)
data->fan[i] = adt7462_read_word_data(client,
ADT7462_REG_FAN(i));
data->fan_enabled = i2c_smbus_read_byte_data(client,
ADT7462_REG_FAN_ENABLE);
for (i = 0; i < ADT7462_PWM_COUNT; i++)
data->pwm[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM(i));
for (i = 0; i < ADT7462_PIN_CFG_REG_COUNT; i++)
data->pin_cfg[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PIN_CFG(i));
for (i = 0; i < ADT7462_VOLT_COUNT; i++) {
int reg = ADT7462_REG_VOLT(data, i);
if (!reg)
data->voltages[i] = 0;
else
data->voltages[i] = i2c_smbus_read_byte_data(client,
reg);
}
data->alarms[0] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM1);
data->alarms[1] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM2);
data->alarms[2] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM3);
data->alarms[3] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM4);
data->sensors_last_updated = local_jiffies;
data->sensors_valid = 1;
no_sensor_update:
if (time_before(local_jiffies, data->limits_last_updated +
LIMIT_REFRESH_INTERVAL)
&& data->limits_valid)
goto out;
for (i = 0; i < ADT7462_TEMP_COUNT; i++) {
data->temp_min[i] = i2c_smbus_read_byte_data(client,
ADT7462_TEMP_MIN_REG(i));
data->temp_max[i] = i2c_smbus_read_byte_data(client,
ADT7462_TEMP_MAX_REG(i));
}
for (i = 0; i < ADT7462_FAN_COUNT; i++)
data->fan_min[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_FAN_MIN(i));
for (i = 0; i < ADT7462_VOLT_COUNT; i++) {
int reg = ADT7462_REG_VOLT_MAX(data, i);
data->volt_max[i] =
(reg ? i2c_smbus_read_byte_data(client, reg) : 0);
reg = ADT7462_REG_VOLT_MIN(data, i);
data->volt_min[i] =
(reg ? i2c_smbus_read_byte_data(client, reg) : 0);
}
for (i = 0; i < ADT7462_PWM_COUNT; i++) {
data->pwm_min[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM_MIN(i));
data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM_TMIN(i));
data->pwm_trange[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM_TRANGE(i));
data->pwm_cfg[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM_CFG(i));
}
data->pwm_max = i2c_smbus_read_byte_data(client, ADT7462_REG_PWM_MAX);
data->cfg2 = i2c_smbus_read_byte_data(client, ADT7462_REG_CFG2);
data->limits_last_updated = local_jiffies;
data->limits_valid = 1;
out:
mutex_unlock(&data->lock);
return data;
}
static ssize_t temp_min_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
if (!temp_enabled(data, attr->index))
return sprintf(buf, "0\n");
return sprintf(buf, "%d\n", 1000 * (data->temp_min[attr->index] - 64));
}
static ssize_t temp_min_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp) || !temp_enabled(data, attr->index))
return -EINVAL;
temp = clamp_val(temp, -64000, 191000);
temp = DIV_ROUND_CLOSEST(temp, 1000) + 64;
mutex_lock(&data->lock);
data->temp_min[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7462_TEMP_MIN_REG(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t temp_max_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
if (!temp_enabled(data, attr->index))
return sprintf(buf, "0\n");
return sprintf(buf, "%d\n", 1000 * (data->temp_max[attr->index] - 64));
}
static ssize_t temp_max_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp) || !temp_enabled(data, attr->index))
return -EINVAL;
temp = clamp_val(temp, -64000, 191000);
temp = DIV_ROUND_CLOSEST(temp, 1000) + 64;
mutex_lock(&data->lock);
data->temp_max[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7462_TEMP_MAX_REG(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
u8 frac = data->temp_frac[attr->index] >> TEMP_FRAC_OFFSET;
if (!temp_enabled(data, attr->index))
return sprintf(buf, "0\n");
return sprintf(buf, "%d\n", 1000 * (data->temp[attr->index] - 64) +
250 * frac);
}
static ssize_t temp_label_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
return sprintf(buf, "%s\n", temp_label(data, attr->index));
}
static ssize_t volt_max_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
int x = voltage_multiplier(data, attr->index);
x *= data->volt_max[attr->index];
x /= 1000; /* convert from uV to mV */
return sprintf(buf, "%d\n", x);
}
static ssize_t volt_max_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int x = voltage_multiplier(data, attr->index);
long temp;
if (kstrtol(buf, 10, &temp) || !x)
return -EINVAL;
temp = clamp_val(temp, 0, 255 * x / 1000);
temp *= 1000; /* convert mV to uV */
temp = DIV_ROUND_CLOSEST(temp, x);
mutex_lock(&data->lock);
data->volt_max[attr->index] = temp;
i2c_smbus_write_byte_data(client,
ADT7462_REG_VOLT_MAX(data, attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t volt_min_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
int x = voltage_multiplier(data, attr->index);
x *= data->volt_min[attr->index];
x /= 1000; /* convert from uV to mV */
return sprintf(buf, "%d\n", x);
}
static ssize_t volt_min_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int x = voltage_multiplier(data, attr->index);
long temp;
if (kstrtol(buf, 10, &temp) || !x)
return -EINVAL;
temp = clamp_val(temp, 0, 255 * x / 1000);
temp *= 1000; /* convert mV to uV */
temp = DIV_ROUND_CLOSEST(temp, x);
mutex_lock(&data->lock);
data->volt_min[attr->index] = temp;
i2c_smbus_write_byte_data(client,
ADT7462_REG_VOLT_MIN(data, attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t voltage_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
int x = voltage_multiplier(data, attr->index);
x *= data->voltages[attr->index];
x /= 1000; /* convert from uV to mV */
return sprintf(buf, "%d\n", x);
}
static ssize_t voltage_label_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
return sprintf(buf, "%s\n", voltage_label(data, attr->index));
}
static ssize_t alarm_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
int reg = attr->index >> ADT7462_ALARM_REG_SHIFT;
int mask = attr->index & ADT7462_ALARM_FLAG_MASK;
if (data->alarms[reg] & mask)
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static int fan_enabled(struct adt7462_data *data, int fan)
{
return data->fan_enabled & (1 << fan);
}
static ssize_t fan_min_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
u16 temp;