-
Notifications
You must be signed in to change notification settings - Fork 115
/
Copy pathqcom_spmi-regulator.c
1434 lines (1217 loc) · 44.5 KB
/
qcom_spmi-regulator.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
/*
* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/ktime.h>
#include <linux/regulator/driver.h>
#include <linux/regmap.h>
#include <linux/list.h>
/* These types correspond to unique register layouts. */
enum spmi_regulator_logical_type {
SPMI_REGULATOR_LOGICAL_TYPE_SMPS,
SPMI_REGULATOR_LOGICAL_TYPE_LDO,
SPMI_REGULATOR_LOGICAL_TYPE_VS,
SPMI_REGULATOR_LOGICAL_TYPE_BOOST,
SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS,
SPMI_REGULATOR_LOGICAL_TYPE_BOOST_BYP,
SPMI_REGULATOR_LOGICAL_TYPE_LN_LDO,
SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS,
SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS,
SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO,
};
enum spmi_regulator_type {
SPMI_REGULATOR_TYPE_BUCK = 0x03,
SPMI_REGULATOR_TYPE_LDO = 0x04,
SPMI_REGULATOR_TYPE_VS = 0x05,
SPMI_REGULATOR_TYPE_BOOST = 0x1b,
SPMI_REGULATOR_TYPE_FTS = 0x1c,
SPMI_REGULATOR_TYPE_BOOST_BYP = 0x1f,
SPMI_REGULATOR_TYPE_ULT_LDO = 0x21,
SPMI_REGULATOR_TYPE_ULT_BUCK = 0x22,
};
enum spmi_regulator_subtype {
SPMI_REGULATOR_SUBTYPE_GP_CTL = 0x08,
SPMI_REGULATOR_SUBTYPE_RF_CTL = 0x09,
SPMI_REGULATOR_SUBTYPE_N50 = 0x01,
SPMI_REGULATOR_SUBTYPE_N150 = 0x02,
SPMI_REGULATOR_SUBTYPE_N300 = 0x03,
SPMI_REGULATOR_SUBTYPE_N600 = 0x04,
SPMI_REGULATOR_SUBTYPE_N1200 = 0x05,
SPMI_REGULATOR_SUBTYPE_N600_ST = 0x06,
SPMI_REGULATOR_SUBTYPE_N1200_ST = 0x07,
SPMI_REGULATOR_SUBTYPE_N900_ST = 0x14,
SPMI_REGULATOR_SUBTYPE_N300_ST = 0x15,
SPMI_REGULATOR_SUBTYPE_P50 = 0x08,
SPMI_REGULATOR_SUBTYPE_P150 = 0x09,
SPMI_REGULATOR_SUBTYPE_P300 = 0x0a,
SPMI_REGULATOR_SUBTYPE_P600 = 0x0b,
SPMI_REGULATOR_SUBTYPE_P1200 = 0x0c,
SPMI_REGULATOR_SUBTYPE_LN = 0x10,
SPMI_REGULATOR_SUBTYPE_LV_P50 = 0x28,
SPMI_REGULATOR_SUBTYPE_LV_P150 = 0x29,
SPMI_REGULATOR_SUBTYPE_LV_P300 = 0x2a,
SPMI_REGULATOR_SUBTYPE_LV_P600 = 0x2b,
SPMI_REGULATOR_SUBTYPE_LV_P1200 = 0x2c,
SPMI_REGULATOR_SUBTYPE_LV_P450 = 0x2d,
SPMI_REGULATOR_SUBTYPE_LV100 = 0x01,
SPMI_REGULATOR_SUBTYPE_LV300 = 0x02,
SPMI_REGULATOR_SUBTYPE_MV300 = 0x08,
SPMI_REGULATOR_SUBTYPE_MV500 = 0x09,
SPMI_REGULATOR_SUBTYPE_HDMI = 0x10,
SPMI_REGULATOR_SUBTYPE_OTG = 0x11,
SPMI_REGULATOR_SUBTYPE_5V_BOOST = 0x01,
SPMI_REGULATOR_SUBTYPE_FTS_CTL = 0x08,
SPMI_REGULATOR_SUBTYPE_FTS2p5_CTL = 0x09,
SPMI_REGULATOR_SUBTYPE_BB_2A = 0x01,
SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL1 = 0x0d,
SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL2 = 0x0e,
SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL3 = 0x0f,
SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL4 = 0x10,
};
enum spmi_common_regulator_registers {
SPMI_COMMON_REG_DIG_MAJOR_REV = 0x01,
SPMI_COMMON_REG_TYPE = 0x04,
SPMI_COMMON_REG_SUBTYPE = 0x05,
SPMI_COMMON_REG_VOLTAGE_RANGE = 0x40,
SPMI_COMMON_REG_VOLTAGE_SET = 0x41,
SPMI_COMMON_REG_MODE = 0x45,
SPMI_COMMON_REG_ENABLE = 0x46,
SPMI_COMMON_REG_PULL_DOWN = 0x48,
SPMI_COMMON_REG_SOFT_START = 0x4c,
SPMI_COMMON_REG_STEP_CTRL = 0x61,
};
enum spmi_vs_registers {
SPMI_VS_REG_OCP = 0x4a,
SPMI_VS_REG_SOFT_START = 0x4c,
};
enum spmi_boost_registers {
SPMI_BOOST_REG_CURRENT_LIMIT = 0x4a,
};
enum spmi_boost_byp_registers {
SPMI_BOOST_BYP_REG_CURRENT_LIMIT = 0x4b,
};
/* Used for indexing into ctrl_reg. These are offets from 0x40 */
enum spmi_common_control_register_index {
SPMI_COMMON_IDX_VOLTAGE_RANGE = 0,
SPMI_COMMON_IDX_VOLTAGE_SET = 1,
SPMI_COMMON_IDX_MODE = 5,
SPMI_COMMON_IDX_ENABLE = 6,
};
/* Common regulator control register layout */
#define SPMI_COMMON_ENABLE_MASK 0x80
#define SPMI_COMMON_ENABLE 0x80
#define SPMI_COMMON_DISABLE 0x00
#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN3_MASK 0x08
#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN2_MASK 0x04
#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN1_MASK 0x02
#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN0_MASK 0x01
#define SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK 0x0f
/* Common regulator mode register layout */
#define SPMI_COMMON_MODE_HPM_MASK 0x80
#define SPMI_COMMON_MODE_AUTO_MASK 0x40
#define SPMI_COMMON_MODE_BYPASS_MASK 0x20
#define SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK 0x10
#define SPMI_COMMON_MODE_FOLLOW_HW_EN3_MASK 0x08
#define SPMI_COMMON_MODE_FOLLOW_HW_EN2_MASK 0x04
#define SPMI_COMMON_MODE_FOLLOW_HW_EN1_MASK 0x02
#define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK 0x01
#define SPMI_COMMON_MODE_FOLLOW_ALL_MASK 0x1f
/* Common regulator pull down control register layout */
#define SPMI_COMMON_PULL_DOWN_ENABLE_MASK 0x80
/* LDO regulator current limit control register layout */
#define SPMI_LDO_CURRENT_LIMIT_ENABLE_MASK 0x80
/* LDO regulator soft start control register layout */
#define SPMI_LDO_SOFT_START_ENABLE_MASK 0x80
/* VS regulator over current protection control register layout */
#define SPMI_VS_OCP_OVERRIDE 0x01
#define SPMI_VS_OCP_NO_OVERRIDE 0x00
/* VS regulator soft start control register layout */
#define SPMI_VS_SOFT_START_ENABLE_MASK 0x80
#define SPMI_VS_SOFT_START_SEL_MASK 0x03
/* Boost regulator current limit control register layout */
#define SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK 0x80
#define SPMI_BOOST_CURRENT_LIMIT_MASK 0x07
#define SPMI_VS_OCP_DEFAULT_MAX_RETRIES 10
#define SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS 30
#define SPMI_VS_OCP_FALL_DELAY_US 90
#define SPMI_VS_OCP_FAULT_DELAY_US 20000
#define SPMI_FTSMPS_STEP_CTRL_STEP_MASK 0x18
#define SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT 3
#define SPMI_FTSMPS_STEP_CTRL_DELAY_MASK 0x07
#define SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT 0
/* Clock rate in kHz of the FTSMPS regulator reference clock. */
#define SPMI_FTSMPS_CLOCK_RATE 19200
/* Minimum voltage stepper delay for each step. */
#define SPMI_FTSMPS_STEP_DELAY 8
/*
* The ratio SPMI_FTSMPS_STEP_MARGIN_NUM/SPMI_FTSMPS_STEP_MARGIN_DEN is used to
* adjust the step rate in order to account for oscillator variance.
*/
#define SPMI_FTSMPS_STEP_MARGIN_NUM 4
#define SPMI_FTSMPS_STEP_MARGIN_DEN 5
/*
* This voltage in uV is returned by get_voltage functions when there is no way
* to determine the current voltage level. It is needed because the regulator
* framework treats a 0 uV voltage as an error.
*/
#define VOLTAGE_UNKNOWN 1
/* VSET value to decide the range of ULT SMPS */
#define ULT_SMPS_RANGE_SPLIT 0x60
/**
* struct spmi_voltage_range - regulator set point voltage mapping description
* @min_uV: Minimum programmable output voltage resulting from
* set point register value 0x00
* @max_uV: Maximum programmable output voltage
* @step_uV: Output voltage increase resulting from the set point
* register value increasing by 1
* @set_point_min_uV: Minimum allowed voltage
* @set_point_max_uV: Maximum allowed voltage. This may be tweaked in order
* to pick which range should be used in the case of
* overlapping set points.
* @n_voltages: Number of preferred voltage set points present in this
* range
* @range_sel: Voltage range register value corresponding to this range
*
* The following relationships must be true for the values used in this struct:
* (max_uV - min_uV) % step_uV == 0
* (set_point_min_uV - min_uV) % step_uV == 0*
* (set_point_max_uV - min_uV) % step_uV == 0*
* n_voltages = (set_point_max_uV - set_point_min_uV) / step_uV + 1
*
* *Note, set_point_min_uV == set_point_max_uV == 0 is allowed in order to
* specify that the voltage range has meaning, but is not preferred.
*/
struct spmi_voltage_range {
int min_uV;
int max_uV;
int step_uV;
int set_point_min_uV;
int set_point_max_uV;
unsigned n_voltages;
u8 range_sel;
};
/*
* The ranges specified in the spmi_voltage_set_points struct must be listed
* so that range[i].set_point_max_uV < range[i+1].set_point_min_uV.
*/
struct spmi_voltage_set_points {
struct spmi_voltage_range *range;
int count;
unsigned n_voltages;
};
struct spmi_regulator {
struct regulator_desc desc;
struct device *dev;
struct delayed_work ocp_work;
struct regmap *regmap;
struct spmi_voltage_set_points *set_points;
enum spmi_regulator_logical_type logical_type;
int ocp_irq;
int ocp_count;
int ocp_max_retries;
int ocp_retry_delay_ms;
int hpm_min_load;
int slew_rate;
ktime_t vs_enable_time;
u16 base;
struct list_head node;
};
struct spmi_regulator_mapping {
enum spmi_regulator_type type;
enum spmi_regulator_subtype subtype;
enum spmi_regulator_logical_type logical_type;
u32 revision_min;
u32 revision_max;
struct regulator_ops *ops;
struct spmi_voltage_set_points *set_points;
int hpm_min_load;
};
struct spmi_regulator_data {
const char *name;
u16 base;
const char *supply;
const char *ocp;
u16 force_type;
};
#define SPMI_VREG(_type, _subtype, _dig_major_min, _dig_major_max, \
_logical_type, _ops_val, _set_points_val, _hpm_min_load) \
{ \
.type = SPMI_REGULATOR_TYPE_##_type, \
.subtype = SPMI_REGULATOR_SUBTYPE_##_subtype, \
.revision_min = _dig_major_min, \
.revision_max = _dig_major_max, \
.logical_type = SPMI_REGULATOR_LOGICAL_TYPE_##_logical_type, \
.ops = &spmi_##_ops_val##_ops, \
.set_points = &_set_points_val##_set_points, \
.hpm_min_load = _hpm_min_load, \
}
#define SPMI_VREG_VS(_subtype, _dig_major_min, _dig_major_max) \
{ \
.type = SPMI_REGULATOR_TYPE_VS, \
.subtype = SPMI_REGULATOR_SUBTYPE_##_subtype, \
.revision_min = _dig_major_min, \
.revision_max = _dig_major_max, \
.logical_type = SPMI_REGULATOR_LOGICAL_TYPE_VS, \
.ops = &spmi_vs_ops, \
}
#define SPMI_VOLTAGE_RANGE(_range_sel, _min_uV, _set_point_min_uV, \
_set_point_max_uV, _max_uV, _step_uV) \
{ \
.min_uV = _min_uV, \
.max_uV = _max_uV, \
.set_point_min_uV = _set_point_min_uV, \
.set_point_max_uV = _set_point_max_uV, \
.step_uV = _step_uV, \
.range_sel = _range_sel, \
}
#define DEFINE_SPMI_SET_POINTS(name) \
struct spmi_voltage_set_points name##_set_points = { \
.range = name##_ranges, \
.count = ARRAY_SIZE(name##_ranges), \
}
/*
* These tables contain the physically available PMIC regulator voltage setpoint
* ranges. Where two ranges overlap in hardware, one of the ranges is trimmed
* to ensure that the setpoints available to software are monotonically
* increasing and unique. The set_voltage callback functions expect these
* properties to hold.
*/
static struct spmi_voltage_range pldo_ranges[] = {
SPMI_VOLTAGE_RANGE(2, 750000, 750000, 1537500, 1537500, 12500),
SPMI_VOLTAGE_RANGE(3, 1500000, 1550000, 3075000, 3075000, 25000),
SPMI_VOLTAGE_RANGE(4, 1750000, 3100000, 4900000, 4900000, 50000),
};
static struct spmi_voltage_range nldo1_ranges[] = {
SPMI_VOLTAGE_RANGE(2, 750000, 750000, 1537500, 1537500, 12500),
};
static struct spmi_voltage_range nldo2_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 375000, 0, 0, 1537500, 12500),
SPMI_VOLTAGE_RANGE(1, 375000, 375000, 768750, 768750, 6250),
SPMI_VOLTAGE_RANGE(2, 750000, 775000, 1537500, 1537500, 12500),
};
static struct spmi_voltage_range nldo3_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1537500, 1537500, 12500),
SPMI_VOLTAGE_RANGE(1, 375000, 0, 0, 1537500, 12500),
SPMI_VOLTAGE_RANGE(2, 750000, 0, 0, 1537500, 12500),
};
static struct spmi_voltage_range ln_ldo_ranges[] = {
SPMI_VOLTAGE_RANGE(1, 690000, 690000, 1110000, 1110000, 60000),
SPMI_VOLTAGE_RANGE(0, 1380000, 1380000, 2220000, 2220000, 120000),
};
static struct spmi_voltage_range smps_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1562500, 1562500, 12500),
SPMI_VOLTAGE_RANGE(1, 1550000, 1575000, 3125000, 3125000, 25000),
};
static struct spmi_voltage_range ftsmps_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 0, 350000, 1275000, 1275000, 5000),
SPMI_VOLTAGE_RANGE(1, 0, 1280000, 2040000, 2040000, 10000),
};
static struct spmi_voltage_range ftsmps2p5_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 80000, 350000, 1355000, 1355000, 5000),
SPMI_VOLTAGE_RANGE(1, 160000, 1360000, 2200000, 2200000, 10000),
};
static struct spmi_voltage_range boost_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000),
};
static struct spmi_voltage_range boost_byp_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 2500000, 2500000, 5200000, 5650000, 50000),
};
static struct spmi_voltage_range ult_lo_smps_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1562500, 1562500, 12500),
SPMI_VOLTAGE_RANGE(1, 750000, 0, 0, 1525000, 25000),
};
static struct spmi_voltage_range ult_ho_smps_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 1550000, 1550000, 2325000, 2325000, 25000),
};
static struct spmi_voltage_range ult_nldo_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1537500, 1537500, 12500),
};
static struct spmi_voltage_range ult_pldo_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 1750000, 1750000, 3337500, 3337500, 12500),
};
static DEFINE_SPMI_SET_POINTS(pldo);
static DEFINE_SPMI_SET_POINTS(nldo1);
static DEFINE_SPMI_SET_POINTS(nldo2);
static DEFINE_SPMI_SET_POINTS(nldo3);
static DEFINE_SPMI_SET_POINTS(ln_ldo);
static DEFINE_SPMI_SET_POINTS(smps);
static DEFINE_SPMI_SET_POINTS(ftsmps);
static DEFINE_SPMI_SET_POINTS(ftsmps2p5);
static DEFINE_SPMI_SET_POINTS(boost);
static DEFINE_SPMI_SET_POINTS(boost_byp);
static DEFINE_SPMI_SET_POINTS(ult_lo_smps);
static DEFINE_SPMI_SET_POINTS(ult_ho_smps);
static DEFINE_SPMI_SET_POINTS(ult_nldo);
static DEFINE_SPMI_SET_POINTS(ult_pldo);
static inline int spmi_vreg_read(struct spmi_regulator *vreg, u16 addr, u8 *buf,
int len)
{
return regmap_bulk_read(vreg->regmap, vreg->base + addr, buf, len);
}
static inline int spmi_vreg_write(struct spmi_regulator *vreg, u16 addr,
u8 *buf, int len)
{
return regmap_bulk_write(vreg->regmap, vreg->base + addr, buf, len);
}
static int spmi_vreg_update_bits(struct spmi_regulator *vreg, u16 addr, u8 val,
u8 mask)
{
return regmap_update_bits(vreg->regmap, vreg->base + addr, mask, val);
}
static int spmi_regulator_common_is_enabled(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
u8 reg;
spmi_vreg_read(vreg, SPMI_COMMON_REG_ENABLE, ®, 1);
return (reg & SPMI_COMMON_ENABLE_MASK) == SPMI_COMMON_ENABLE;
}
static int spmi_regulator_common_enable(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
}
static int spmi_regulator_vs_enable(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
if (vreg->ocp_irq) {
vreg->ocp_count = 0;
vreg->vs_enable_time = ktime_get();
}
return spmi_regulator_common_enable(rdev);
}
static int spmi_regulator_common_disable(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
}
static int spmi_regulator_select_voltage(struct spmi_regulator *vreg,
int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel,
unsigned *selector)
{
const struct spmi_voltage_range *range;
int uV = min_uV;
int lim_min_uV, lim_max_uV, i, range_id, range_max_uV;
/* Check if request voltage is outside of physically settable range. */
lim_min_uV = vreg->set_points->range[0].set_point_min_uV;
lim_max_uV =
vreg->set_points->range[vreg->set_points->count - 1].set_point_max_uV;
if (uV < lim_min_uV && max_uV >= lim_min_uV)
uV = lim_min_uV;
if (uV < lim_min_uV || uV > lim_max_uV) {
dev_err(vreg->dev,
"request v=[%d, %d] is outside possible v=[%d, %d]\n",
min_uV, max_uV, lim_min_uV, lim_max_uV);
return -EINVAL;
}
/* Find the range which uV is inside of. */
for (i = vreg->set_points->count - 1; i > 0; i--) {
range_max_uV = vreg->set_points->range[i - 1].set_point_max_uV;
if (uV > range_max_uV && range_max_uV > 0)
break;
}
range_id = i;
range = &vreg->set_points->range[range_id];
*range_sel = range->range_sel;
/*
* Force uV to be an allowed set point by applying a ceiling function to
* the uV value.
*/
*voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
uV = *voltage_sel * range->step_uV + range->min_uV;
if (uV > max_uV) {
dev_err(vreg->dev,
"request v=[%d, %d] cannot be met by any set point; "
"next set point: %d\n",
min_uV, max_uV, uV);
return -EINVAL;
}
*selector = 0;
for (i = 0; i < range_id; i++)
*selector += vreg->set_points->range[i].n_voltages;
*selector += (uV - range->set_point_min_uV) / range->step_uV;
return 0;
}
static const struct spmi_voltage_range *
spmi_regulator_find_range(struct spmi_regulator *vreg)
{
u8 range_sel;
const struct spmi_voltage_range *range, *end;
range = vreg->set_points->range;
end = range + vreg->set_points->count;
spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1);
for (; range < end; range++)
if (range->range_sel == range_sel)
return range;
return NULL;
}
static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg,
int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel,
unsigned *selector)
{
const struct spmi_voltage_range *range;
int uV = min_uV;
int i;
range = spmi_regulator_find_range(vreg);
if (!range)
goto different_range;
if (uV < range->min_uV && max_uV >= range->min_uV)
uV = range->min_uV;
if (uV < range->min_uV || uV > range->max_uV) {
/* Current range doesn't support the requested voltage. */
goto different_range;
}
/*
* Force uV to be an allowed set point by applying a ceiling function to
* the uV value.
*/
*voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
uV = *voltage_sel * range->step_uV + range->min_uV;
if (uV > max_uV) {
/*
* No set point in the current voltage range is within the
* requested min_uV to max_uV range.
*/
goto different_range;
}
*selector = 0;
for (i = 0; i < vreg->set_points->count; i++) {
if (uV >= vreg->set_points->range[i].set_point_min_uV
&& uV <= vreg->set_points->range[i].set_point_max_uV) {
*selector +=
(uV - vreg->set_points->range[i].set_point_min_uV)
/ vreg->set_points->range[i].step_uV;
break;
}
*selector += vreg->set_points->range[i].n_voltages;
}
if (*selector >= vreg->set_points->n_voltages)
goto different_range;
return 0;
different_range:
return spmi_regulator_select_voltage(vreg, min_uV, max_uV,
range_sel, voltage_sel, selector);
}
static int spmi_regulator_common_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV, unsigned *selector)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
int ret;
u8 buf[2];
u8 range_sel, voltage_sel;
/*
* Favor staying in the current voltage range if possible. This avoids
* voltage spikes that occur when changing the voltage range.
*/
ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
&range_sel, &voltage_sel, selector);
if (ret)
return ret;
buf[0] = range_sel;
buf[1] = voltage_sel;
return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, buf, 2);
}
static int spmi_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector, unsigned int new_selector)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
const struct spmi_voltage_range *range;
int diff_uV;
range = spmi_regulator_find_range(vreg);
if (!range)
return -EINVAL;
diff_uV = abs(new_selector - old_selector) * range->step_uV;
return DIV_ROUND_UP(diff_uV, vreg->slew_rate);
}
static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
const struct spmi_voltage_range *range;
u8 voltage_sel;
spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
range = spmi_regulator_find_range(vreg);
if (!range)
return VOLTAGE_UNKNOWN;
return range->step_uV * voltage_sel + range->min_uV;
}
static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV, unsigned *selector)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
int ret;
u8 range_sel, sel;
ret = spmi_regulator_select_voltage(vreg, min_uV, max_uV, &range_sel,
&sel, selector);
if (ret) {
dev_err(vreg->dev, "could not set voltage, ret=%d\n", ret);
return ret;
}
/*
* Certain types of regulators do not have a range select register so
* only voltage set register needs to be written.
*/
return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &sel, 1);
}
static int spmi_regulator_single_range_get_voltage(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
const struct spmi_voltage_range *range = vreg->set_points->range;
u8 voltage_sel;
spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
return range->step_uV * voltage_sel + range->min_uV;
}
static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV, unsigned *selector)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
int ret;
u8 range_sel, voltage_sel;
/*
* Favor staying in the current voltage range if possible. This avoids
* voltage spikes that occur when changing the voltage range.
*/
ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
&range_sel, &voltage_sel, selector);
if (ret)
return ret;
/*
* Calculate VSET based on range
* In case of range 0: voltage_sel is a 7 bit value, can be written
* witout any modification.
* In case of range 1: voltage_sel is a 5 bit value, bits[7-5] set to
* [011].
*/
if (range_sel == 1)
voltage_sel |= ULT_SMPS_RANGE_SPLIT;
return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET,
voltage_sel, 0xff);
}
static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
const struct spmi_voltage_range *range;
u8 voltage_sel;
spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
range = spmi_regulator_find_range(vreg);
if (!range)
return VOLTAGE_UNKNOWN;
if (range->range_sel == 1)
voltage_sel &= ~ULT_SMPS_RANGE_SPLIT;
return range->step_uV * voltage_sel + range->min_uV;
}
static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev,
unsigned selector)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
int uV = 0;
int i;
if (selector >= vreg->set_points->n_voltages)
return 0;
for (i = 0; i < vreg->set_points->count; i++) {
if (selector < vreg->set_points->range[i].n_voltages) {
uV = selector * vreg->set_points->range[i].step_uV
+ vreg->set_points->range[i].set_point_min_uV;
break;
}
selector -= vreg->set_points->range[i].n_voltages;
}
return uV;
}
static int
spmi_regulator_common_set_bypass(struct regulator_dev *rdev, bool enable)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
u8 mask = SPMI_COMMON_MODE_BYPASS_MASK;
u8 val = 0;
if (enable)
val = mask;
return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
}
static int
spmi_regulator_common_get_bypass(struct regulator_dev *rdev, bool *enable)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
u8 val;
int ret;
ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &val, 1);
*enable = val & SPMI_COMMON_MODE_BYPASS_MASK;
return ret;
}
static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
u8 reg;
spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, ®, 1);
if (reg & SPMI_COMMON_MODE_HPM_MASK)
return REGULATOR_MODE_NORMAL;
return REGULATOR_MODE_IDLE;
}
static int
spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
u8 mask = SPMI_COMMON_MODE_HPM_MASK;
u8 val = 0;
if (mode == REGULATOR_MODE_NORMAL)
val = mask;
return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
}
static int
spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
unsigned int mode;
if (load_uA >= vreg->hpm_min_load)
mode = REGULATOR_MODE_NORMAL;
else
mode = REGULATOR_MODE_IDLE;
return spmi_regulator_common_set_mode(rdev, mode);
}
static int spmi_regulator_common_set_pull_down(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
unsigned int mask = SPMI_COMMON_PULL_DOWN_ENABLE_MASK;
return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_PULL_DOWN,
mask, mask);
}
static int spmi_regulator_common_set_soft_start(struct regulator_dev *rdev)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
unsigned int mask = SPMI_LDO_SOFT_START_ENABLE_MASK;
return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_SOFT_START,
mask, mask);
}
static int spmi_regulator_set_ilim(struct regulator_dev *rdev, int ilim_uA)
{
struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
enum spmi_regulator_logical_type type = vreg->logical_type;
unsigned int current_reg;
u8 reg;
u8 mask = SPMI_BOOST_CURRENT_LIMIT_MASK |
SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
int max = (SPMI_BOOST_CURRENT_LIMIT_MASK + 1) * 500;
if (type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST)
current_reg = SPMI_BOOST_REG_CURRENT_LIMIT;
else
current_reg = SPMI_BOOST_BYP_REG_CURRENT_LIMIT;
if (ilim_uA > max || ilim_uA <= 0)
return -EINVAL;
reg = (ilim_uA - 1) / 500;
reg |= SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
return spmi_vreg_update_bits(vreg, current_reg, reg, mask);
}
static int spmi_regulator_vs_clear_ocp(struct spmi_regulator *vreg)
{
int ret;
ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
vreg->vs_enable_time = ktime_get();
ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
return ret;
}
static void spmi_regulator_vs_ocp_work(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct spmi_regulator *vreg
= container_of(dwork, struct spmi_regulator, ocp_work);
spmi_regulator_vs_clear_ocp(vreg);
}
static irqreturn_t spmi_regulator_vs_ocp_isr(int irq, void *data)
{
struct spmi_regulator *vreg = data;
ktime_t ocp_irq_time;
s64 ocp_trigger_delay_us;
ocp_irq_time = ktime_get();
ocp_trigger_delay_us = ktime_us_delta(ocp_irq_time,
vreg->vs_enable_time);
/*
* Reset the OCP count if there is a large delay between switch enable
* and when OCP triggers. This is indicative of a hotplug event as
* opposed to a fault.
*/
if (ocp_trigger_delay_us > SPMI_VS_OCP_FAULT_DELAY_US)
vreg->ocp_count = 0;
/* Wait for switch output to settle back to 0 V after OCP triggered. */
udelay(SPMI_VS_OCP_FALL_DELAY_US);
vreg->ocp_count++;
if (vreg->ocp_count == 1) {
/* Immediately clear the over current condition. */
spmi_regulator_vs_clear_ocp(vreg);
} else if (vreg->ocp_count <= vreg->ocp_max_retries) {
/* Schedule the over current clear task to run later. */
schedule_delayed_work(&vreg->ocp_work,
msecs_to_jiffies(vreg->ocp_retry_delay_ms) + 1);
} else {
dev_err(vreg->dev,
"OCP triggered %d times; no further retries\n",
vreg->ocp_count);
}
return IRQ_HANDLED;
}
static struct regulator_ops spmi_smps_ops = {
.enable = spmi_regulator_common_enable,
.disable = spmi_regulator_common_disable,
.is_enabled = spmi_regulator_common_is_enabled,
.set_voltage = spmi_regulator_common_set_voltage,
.get_voltage = spmi_regulator_common_get_voltage,
.list_voltage = spmi_regulator_common_list_voltage,
.set_mode = spmi_regulator_common_set_mode,
.get_mode = spmi_regulator_common_get_mode,
.set_load = spmi_regulator_common_set_load,
.set_pull_down = spmi_regulator_common_set_pull_down,
};
static struct regulator_ops spmi_ldo_ops = {
.enable = spmi_regulator_common_enable,
.disable = spmi_regulator_common_disable,
.is_enabled = spmi_regulator_common_is_enabled,
.set_voltage = spmi_regulator_common_set_voltage,
.get_voltage = spmi_regulator_common_get_voltage,
.list_voltage = spmi_regulator_common_list_voltage,
.set_mode = spmi_regulator_common_set_mode,
.get_mode = spmi_regulator_common_get_mode,
.set_load = spmi_regulator_common_set_load,
.set_bypass = spmi_regulator_common_set_bypass,
.get_bypass = spmi_regulator_common_get_bypass,
.set_pull_down = spmi_regulator_common_set_pull_down,
.set_soft_start = spmi_regulator_common_set_soft_start,
};
static struct regulator_ops spmi_ln_ldo_ops = {
.enable = spmi_regulator_common_enable,
.disable = spmi_regulator_common_disable,
.is_enabled = spmi_regulator_common_is_enabled,
.set_voltage = spmi_regulator_common_set_voltage,
.get_voltage = spmi_regulator_common_get_voltage,
.list_voltage = spmi_regulator_common_list_voltage,
.set_bypass = spmi_regulator_common_set_bypass,
.get_bypass = spmi_regulator_common_get_bypass,
};
static struct regulator_ops spmi_vs_ops = {
.enable = spmi_regulator_vs_enable,
.disable = spmi_regulator_common_disable,
.is_enabled = spmi_regulator_common_is_enabled,
.set_pull_down = spmi_regulator_common_set_pull_down,
.set_soft_start = spmi_regulator_common_set_soft_start,
};
static struct regulator_ops spmi_boost_ops = {
.enable = spmi_regulator_common_enable,
.disable = spmi_regulator_common_disable,
.is_enabled = spmi_regulator_common_is_enabled,
.set_voltage = spmi_regulator_single_range_set_voltage,
.get_voltage = spmi_regulator_single_range_get_voltage,
.list_voltage = spmi_regulator_common_list_voltage,
.set_input_current_limit = spmi_regulator_set_ilim,
};
static struct regulator_ops spmi_ftsmps_ops = {
.enable = spmi_regulator_common_enable,
.disable = spmi_regulator_common_disable,
.is_enabled = spmi_regulator_common_is_enabled,
.set_voltage = spmi_regulator_common_set_voltage,
.set_voltage_time_sel = spmi_regulator_set_voltage_time_sel,
.get_voltage = spmi_regulator_common_get_voltage,
.list_voltage = spmi_regulator_common_list_voltage,
.set_mode = spmi_regulator_common_set_mode,
.get_mode = spmi_regulator_common_get_mode,
.set_load = spmi_regulator_common_set_load,
.set_pull_down = spmi_regulator_common_set_pull_down,
};