summaryrefslogtreecommitdiffstats
path: root/drivers/clk/clk-u300.c
blob: 18bf5e576b9390c680b4e9a08637104cb07cdde4 (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
/*
 * U300 clock implementation
 * Copyright (C) 2007-2012 ST-Ericsson AB
 * License terms: GNU General Public License (GPL) version 2
 * Author: Linus Walleij <linus.walleij@stericsson.com>
 * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
 */
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/clk-provider.h>
#include <linux/spinlock.h>
#include <linux/of.h>
#include <linux/platform_data/clk-u300.h>

/* APP side SYSCON registers */
/* CLK Control Register 16bit (R/W) */
#define U300_SYSCON_CCR						(0x0000)
#define U300_SYSCON_CCR_I2S1_USE_VCXO				(0x0040)
#define U300_SYSCON_CCR_I2S0_USE_VCXO				(0x0020)
#define U300_SYSCON_CCR_TURN_VCXO_ON				(0x0008)
#define U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK			(0x0007)
#define U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER		(0x04)
#define U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW			(0x03)
#define U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE		(0x02)
#define U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH			(0x01)
#define U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST			(0x00)
/* CLK Status Register 16bit (R/W) */
#define U300_SYSCON_CSR						(0x0004)
#define U300_SYSCON_CSR_PLL208_LOCK_IND				(0x0002)
#define U300_SYSCON_CSR_PLL13_LOCK_IND				(0x0001)
/* Reset lines for SLOW devices 16bit (R/W) */
#define U300_SYSCON_RSR						(0x0014)
#define U300_SYSCON_RSR_PPM_RESET_EN				(0x0200)
#define U300_SYSCON_RSR_ACC_TMR_RESET_EN			(0x0100)
#define U300_SYSCON_RSR_APP_TMR_RESET_EN			(0x0080)
#define U300_SYSCON_RSR_RTC_RESET_EN				(0x0040)
#define U300_SYSCON_RSR_KEYPAD_RESET_EN				(0x0020)
#define U300_SYSCON_RSR_GPIO_RESET_EN				(0x0010)
#define U300_SYSCON_RSR_EH_RESET_EN				(0x0008)
#define U300_SYSCON_RSR_BTR_RESET_EN				(0x0004)
#define U300_SYSCON_RSR_UART_RESET_EN				(0x0002)
#define U300_SYSCON_RSR_SLOW_BRIDGE_RESET_EN			(0x0001)
/* Reset lines for FAST devices 16bit (R/W) */
#define U300_SYSCON_RFR						(0x0018)
#define U300_SYSCON_RFR_UART1_RESET_ENABLE			(0x0080)
#define U300_SYSCON_RFR_SPI_RESET_ENABLE			(0x0040)
#define U300_SYSCON_RFR_MMC_RESET_ENABLE			(0x0020)
#define U300_SYSCON_RFR_PCM_I2S1_RESET_ENABLE			(0x0010)
#define U300_SYSCON_RFR_PCM_I2S0_RESET_ENABLE			(0x0008)
#define U300_SYSCON_RFR_I2C1_RESET_ENABLE			(0x0004)
#define U300_SYSCON_RFR_I2C0_RESET_ENABLE			(0x0002)
#define U300_SYSCON_RFR_FAST_BRIDGE_RESET_ENABLE		(0x0001)
/* Reset lines for the rest of the peripherals 16bit (R/W) */
#define U300_SYSCON_RRR						(0x001c)
#define U300_SYSCON_RRR_CDS_RESET_EN				(0x4000)
#define U300_SYSCON_RRR_ISP_RESET_EN				(0x2000)
#define U300_SYSCON_RRR_INTCON_RESET_EN				(0x1000)
#define U300_SYSCON_RRR_MSPRO_RESET_EN				(0x0800)
#define U300_SYSCON_RRR_XGAM_RESET_EN				(0x0100)
#define U300_SYSCON_RRR_XGAM_VC_SYNC_RESET_EN			(0x0080)
#define U300_SYSCON_RRR_NANDIF_RESET_EN				(0x0040)
#define U300_SYSCON_RRR_EMIF_RESET_EN				(0x0020)
#define U300_SYSCON_RRR_DMAC_RESET_EN				(0x0010)
#define U300_SYSCON_RRR_CPU_RESET_EN				(0x0008)
#define U300_SYSCON_RRR_APEX_RESET_EN				(0x0004)
#define U300_SYSCON_RRR_AHB_RESET_EN				(0x0002)
#define U300_SYSCON_RRR_AAIF_RESET_EN				(0x0001)
/* Clock enable for SLOW peripherals 16bit (R/W) */
#define U300_SYSCON_CESR					(0x0020)
#define U300_SYSCON_CESR_PPM_CLK_EN				(0x0200)
#define U300_SYSCON_CESR_ACC_TMR_CLK_EN				(0x0100)
#define U300_SYSCON_CESR_APP_TMR_CLK_EN				(0x0080)
#define U300_SYSCON_CESR_KEYPAD_CLK_EN				(0x0040)
#define U300_SYSCON_CESR_GPIO_CLK_EN				(0x0010)
#define U300_SYSCON_CESR_EH_CLK_EN				(0x0008)
#define U300_SYSCON_CESR_BTR_CLK_EN				(0x0004)
#define U300_SYSCON_CESR_UART_CLK_EN				(0x0002)
#define U300_SYSCON_CESR_SLOW_BRIDGE_CLK_EN			(0x0001)
/* Clock enable for FAST peripherals 16bit (R/W) */
#define U300_SYSCON_CEFR					(0x0024)
#define U300_SYSCON_CEFR_UART1_CLK_EN				(0x0200)
#define U300_SYSCON_CEFR_I2S1_CORE_CLK_EN			(0x0100)
#define U300_SYSCON_CEFR_I2S0_CORE_CLK_EN			(0x0080)
#define U300_SYSCON_CEFR_SPI_CLK_EN				(0x0040)
#define U300_SYSCON_CEFR_MMC_CLK_EN				(0x0020)
#define U300_SYSCON_CEFR_I2S1_CLK_EN				(0x0010)
#define U300_SYSCON_CEFR_I2S0_CLK_EN				(0x0008)
#define U300_SYSCON_CEFR_I2C1_CLK_EN				(0x0004)
#define U300_SYSCON_CEFR_I2C0_CLK_EN				(0x0002)
#define U300_SYSCON_CEFR_FAST_BRIDGE_CLK_EN			(0x0001)
/* Clock enable for the rest of the peripherals 16bit (R/W) */
#define U300_SYSCON_CERR					(0x0028)
#define U300_SYSCON_CERR_CDS_CLK_EN				(0x2000)
#define U300_SYSCON_CERR_ISP_CLK_EN				(0x1000)
#define U300_SYSCON_CERR_MSPRO_CLK_EN				(0x0800)
#define U300_SYSCON_CERR_AHB_SUBSYS_BRIDGE_CLK_EN		(0x0400)
#define U300_SYSCON_CERR_SEMI_CLK_EN				(0x0200)
#define U300_SYSCON_CERR_XGAM_CLK_EN				(0x0100)
#define U300_SYSCON_CERR_VIDEO_ENC_CLK_EN			(0x0080)
#define U300_SYSCON_CERR_NANDIF_CLK_EN				(0x0040)
#define U300_SYSCON_CERR_EMIF_CLK_EN				(0x0020)
#define U300_SYSCON_CERR_DMAC_CLK_EN				(0x0010)
#define U300_SYSCON_CERR_CPU_CLK_EN				(0x0008)
#define U300_SYSCON_CERR_APEX_CLK_EN				(0x0004)
#define U300_SYSCON_CERR_AHB_CLK_EN				(0x0002)
#define U300_SYSCON_CERR_AAIF_CLK_EN				(0x0001)
/* Single block clock enable 16bit (-/W) */
#define U300_SYSCON_SBCER					(0x002c)
#define U300_SYSCON_SBCER_PPM_CLK_EN				(0x0009)
#define U300_SYSCON_SBCER_ACC_TMR_CLK_EN			(0x0008)
#define U300_SYSCON_SBCER_APP_TMR_CLK_EN			(0x0007)
#define U300_SYSCON_SBCER_KEYPAD_CLK_EN				(0x0006)
#define U300_SYSCON_SBCER_GPIO_CLK_EN				(0x0004)
#define U300_SYSCON_SBCER_EH_CLK_EN				(0x0003)
#define U300_SYSCON_SBCER_BTR_CLK_EN				(0x0002)
#define U300_SYSCON_SBCER_UART_CLK_EN				(0x0001)
#define U300_SYSCON_SBCER_SLOW_BRIDGE_CLK_EN			(0x0000)
#define U300_SYSCON_SBCER_UART1_CLK_EN				(0x0019)
#define U300_SYSCON_SBCER_I2S1_CORE_CLK_EN			(0x0018)
#define U300_SYSCON_SBCER_I2S0_CORE_CLK_EN			(0x0017)
#define U300_SYSCON_SBCER_SPI_CLK_EN				(0x0016)
#define U300_SYSCON_SBCER_MMC_CLK_EN				(0x0015)
#define U300_SYSCON_SBCER_I2S1_CLK_EN				(0x0014)
#define U300_SYSCON_SBCER_I2S0_CLK_EN				(0x0013)
#define U300_SYSCON_SBCER_I2C1_CLK_EN				(0x0012)
#define U300_SYSCON_SBCER_I2C0_CLK_EN				(0x0011)
#define U300_SYSCON_SBCER_FAST_BRIDGE_CLK_EN			(0x0010)
#define U300_SYSCON_SBCER_CDS_CLK_EN				(0x002D)
#define U300_SYSCON_SBCER_ISP_CLK_EN				(0x002C)
#define U300_SYSCON_SBCER_MSPRO_CLK_EN				(0x002B)
#define U300_SYSCON_SBCER_AHB_SUBSYS_BRIDGE_CLK_EN		(0x002A)
#define U300_SYSCON_SBCER_SEMI_CLK_EN				(0x0029)
#define U300_SYSCON_SBCER_XGAM_CLK_EN				(0x0028)
#define U300_SYSCON_SBCER_VIDEO_ENC_CLK_EN			(0x0027)
#define U300_SYSCON_SBCER_NANDIF_CLK_EN				(0x0026)
#define U300_SYSCON_SBCER_EMIF_CLK_EN				(0x0025)
#define U300_SYSCON_SBCER_DMAC_CLK_EN				(0x0024)
#define U300_SYSCON_SBCER_CPU_CLK_EN				(0x0023)
#define U300_SYSCON_SBCER_APEX_CLK_EN				(0x0022)
#define U300_SYSCON_SBCER_AHB_CLK_EN				(0x0021)
#define U300_SYSCON_SBCER_AAIF_CLK_EN				(0x0020)
/* Single block clock disable 16bit (-/W) */
#define U300_SYSCON_SBCDR					(0x0030)
/* Same values as above for SBCER */
/* Clock force SLOW peripherals 16bit (R/W) */
#define U300_SYSCON_CFSR					(0x003c)
#define U300_SYSCON_CFSR_PPM_CLK_FORCE_EN			(0x0200)
#define U300_SYSCON_CFSR_ACC_TMR_CLK_FORCE_EN			(0x0100)
#define U300_SYSCON_CFSR_APP_TMR_CLK_FORCE_EN			(0x0080)
#define U300_SYSCON_CFSR_KEYPAD_CLK_FORCE_EN			(0x0020)
#define U300_SYSCON_CFSR_GPIO_CLK_FORCE_EN			(0x0010)
#define U300_SYSCON_CFSR_EH_CLK_FORCE_EN			(0x0008)
#define U300_SYSCON_CFSR_BTR_CLK_FORCE_EN			(0x0004)
#define U300_SYSCON_CFSR_UART_CLK_FORCE_EN			(0x0002)
#define U300_SYSCON_CFSR_SLOW_BRIDGE_CLK_FORCE_EN		(0x0001)
/* Clock force FAST peripherals 16bit (R/W) */
#define U300_SYSCON_CFFR					(0x40)
/* Values not defined. Define if you want to use them. */
/* Clock force the rest of the peripherals 16bit (R/W) */
#define U300_SYSCON_CFRR					(0x44)
#define U300_SYSCON_CFRR_CDS_CLK_FORCE_EN			(0x2000)
#define U300_SYSCON_CFRR_ISP_CLK_FORCE_EN			(0x1000)
#define U300_SYSCON_CFRR_MSPRO_CLK_FORCE_EN			(0x0800)
#define U300_SYSCON_CFRR_AHB_SUBSYS_BRIDGE_CLK_FORCE_EN		(0x0400)
#define U300_SYSCON_CFRR_SEMI_CLK_FORCE_EN			(0x0200)
#define U300_SYSCON_CFRR_XGAM_CLK_FORCE_EN			(0x0100)
#define U300_SYSCON_CFRR_VIDEO_ENC_CLK_FORCE_EN			(0x0080)
#define U300_SYSCON_CFRR_NANDIF_CLK_FORCE_EN			(0x0040)
#define U300_SYSCON_CFRR_EMIF_CLK_FORCE_EN			(0x0020)
#define U300_SYSCON_CFRR_DMAC_CLK_FORCE_EN			(0x0010)
#define U300_SYSCON_CFRR_CPU_CLK_FORCE_EN			(0x0008)
#define U300_SYSCON_CFRR_APEX_CLK_FORCE_EN			(0x0004)
#define U300_SYSCON_CFRR_AHB_CLK_FORCE_EN			(0x0002)
#define U300_SYSCON_CFRR_AAIF_CLK_FORCE_EN			(0x0001)
/* PLL208 Frequency Control 16bit (R/W) */
#define U300_SYSCON_PFCR					(0x48)
#define U300_SYSCON_PFCR_DPLL_MULT_NUM				(0x000F)
/* Power Management Control 16bit (R/W) */
#define U300_SYSCON_PMCR					(0x50)
#define U300_SYSCON_PMCR_DCON_ENABLE				(0x0002)
#define U300_SYSCON_PMCR_PWR_MGNT_ENABLE			(0x0001)
/* Reset Out 16bit (R/W) */
#define U300_SYSCON_RCR						(0x6c)
#define U300_SYSCON_RCR_RESOUT0_RST_N_DISABLE			(0x0001)
/* EMIF Slew Rate Control 16bit (R/W) */
#define U300_SYSCON_SRCLR					(0x70)
#define U300_SYSCON_SRCLR_MASK					(0x03FF)
#define U300_SYSCON_SRCLR_VALUE					(0x03FF)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_5_B			(0x0200)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_5_A			(0x0100)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_4_B			(0x0080)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_4_A			(0x0040)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_3_B			(0x0020)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_3_A			(0x0010)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_2_B			(0x0008)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_2_A			(0x0004)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_1_B			(0x0002)
#define U300_SYSCON_SRCLR_EMIF_1_SLRC_1_A			(0x0001)
/* EMIF Clock Control Register 16bit (R/W) */
#define U300_SYSCON_ECCR					(0x0078)
#define U300_SYSCON_ECCR_MASK					(0x000F)
#define U300_SYSCON_ECCR_EMIF_1_STATIC_CLK_EN_N_DISABLE		(0x0008)
#define U300_SYSCON_ECCR_EMIF_1_RET_OUT_CLK_EN_N_DISABLE	(0x0004)
#define U300_SYSCON_ECCR_EMIF_MEMCLK_RET_EN_N_DISABLE		(0x0002)
#define U300_SYSCON_ECCR_EMIF_SDRCLK_RET_EN_N_DISABLE		(0x0001)
/* MMC/MSPRO frequency divider register 0 16bit (R/W) */
#define U300_SYSCON_MMF0R					(0x90)
#define U300_SYSCON_MMF0R_MASK					(0x00FF)
#define U300_SYSCON_MMF0R_FREQ_0_HIGH_MASK			(0x00F0)
#define U300_SYSCON_MMF0R_FREQ_0_LOW_MASK			(0x000F)
/* MMC/MSPRO frequency divider register 1 16bit (R/W) */
#define U300_SYSCON_MMF1R					(0x94)
#define U300_SYSCON_MMF1R_MASK					(0x00FF)
#define U300_SYSCON_MMF1R_FREQ_1_HIGH_MASK			(0x00F0)
#define U300_SYSCON_MMF1R_FREQ_1_LOW_MASK			(0x000F)
/* Clock control for the MMC and MSPRO blocks 16bit (R/W) */
#define U300_SYSCON_MMCR					(0x9C)
#define U300_SYSCON_MMCR_MASK					(0x0003)
#define U300_SYSCON_MMCR_MMC_FB_CLK_SEL_ENABLE			(0x0002)
#define U300_SYSCON_MMCR_MSPRO_FREQSEL_ENABLE			(0x0001)
/* SYS_0_CLK_CONTROL first clock control 16bit (R/W) */
#define U300_SYSCON_S0CCR					(0x120)
#define U300_SYSCON_S0CCR_FIELD_MASK				(0x43FF)
#define U300_SYSCON_S0CCR_CLOCK_REQ				(0x4000)
#define U300_SYSCON_S0CCR_CLOCK_REQ_MONITOR			(0x2000)
#define U300_SYSCON_S0CCR_CLOCK_INV				(0x0200)
#define U300_SYSCON_S0CCR_CLOCK_FREQ_MASK			(0x01E0)
#define U300_SYSCON_S0CCR_CLOCK_SELECT_MASK			(0x001E)
#define U300_SYSCON_S0CCR_CLOCK_ENABLE				(0x0001)
#define U300_SYSCON_S0CCR_SEL_MCLK				(0x8<<1)
#define U300_SYSCON_S0CCR_SEL_ACC_FSM_CLK			(0xA<<1)
#define U300_SYSCON_S0CCR_SEL_PLL60_48_CLK			(0xC<<1)
#define U300_SYSCON_S0CCR_SEL_PLL60_60_CLK			(0xD<<1)
#define U300_SYSCON_S0CCR_SEL_ACC_PLL208_CLK			(0xE<<1)
#define U300_SYSCON_S0CCR_SEL_APP_PLL13_CLK			(0x0<<1)
#define U300_SYSCON_S0CCR_SEL_APP_FSM_CLK			(0x2<<1)
#define U300_SYSCON_S0CCR_SEL_RTC_CLK				(0x4<<1)
#define U300_SYSCON_S0CCR_SEL_APP_PLL208_CLK			(0x6<<1)
/* SYS_1_CLK_CONTROL second clock control 16 bit (R/W) */
#define U300_SYSCON_S1CCR					(0x124)
#define U300_SYSCON_S1CCR_FIELD_MASK				(0x43FF)
#define U300_SYSCON_S1CCR_CLOCK_REQ				(0x4000)
#define U300_SYSCON_S1CCR_CLOCK_REQ_MONITOR			(0x2000)
#define U300_SYSCON_S1CCR_CLOCK_INV				(0x0200)
#define U300_SYSCON_S1CCR_CLOCK_FREQ_MASK			(0x01E0)
#define U300_SYSCON_S1CCR_CLOCK_SELECT_MASK			(0x001E)
#define U300_SYSCON_S1CCR_CLOCK_ENABLE				(0x0001)
#define U300_SYSCON_S1CCR_SEL_MCLK				(0x8<<1)
#define U300_SYSCON_S1CCR_SEL_ACC_FSM_CLK			(0xA<<1)
#define U300_SYSCON_S1CCR_SEL_PLL60_48_CLK			(0xC<<1)
#define U300_SYSCON_S1CCR_SEL_PLL60_60_CLK			(0xD<<1)
#define U300_SYSCON_S1CCR_SEL_ACC_PLL208_CLK			(0xE<<1)
#define U300_SYSCON_S1CCR_SEL_ACC_PLL13_CLK			(0x0<<1)
#define U300_SYSCON_S1CCR_SEL_APP_FSM_CLK			(0x2<<1)
#define U300_SYSCON_S1CCR_SEL_RTC_CLK				(0x4<<1)
#define U300_SYSCON_S1CCR_SEL_APP_PLL208_CLK			(0x6<<1)
/* SYS_2_CLK_CONTROL third clock contol 16 bit (R/W) */
#define U300_SYSCON_S2CCR					(0x128)
#define U300_SYSCON_S2CCR_FIELD_MASK				(0xC3FF)
#define U300_SYSCON_S2CCR_CLK_STEAL				(0x8000)
#define U300_SYSCON_S2CCR_CLOCK_REQ				(0x4000)
#define U300_SYSCON_S2CCR_CLOCK_REQ_MONITOR			(0x2000)
#define U300_SYSCON_S2CCR_CLOCK_INV				(0x0200)
#define U300_SYSCON_S2CCR_CLOCK_FREQ_MASK			(0x01E0)
#define U300_SYSCON_S2CCR_CLOCK_SELECT_MASK			(0x001E)
#define U300_SYSCON_S2CCR_CLOCK_ENABLE				(0x0001)
#define U300_SYSCON_S2CCR_SEL_MCLK				(0x8<<1)
#define U300_SYSCON_S2CCR_SEL_ACC_FSM_CLK			(0xA<<1)
#define U300_SYSCON_S2CCR_SEL_PLL60_48_CLK			(0xC<<1)
#define U300_SYSCON_S2CCR_SEL_PLL60_60_CLK			(0xD<<1)
#define U300_SYSCON_S2CCR_SEL_ACC_PLL208_CLK			(0xE<<1)
#define U300_SYSCON_S2CCR_SEL_ACC_PLL13_CLK			(0x0<<1)
#define U300_SYSCON_S2CCR_SEL_APP_FSM_CLK			(0x2<<1)
#define U300_SYSCON_S2CCR_SEL_RTC_CLK				(0x4<<1)
#define U300_SYSCON_S2CCR_SEL_APP_PLL208_CLK			(0x6<<1)
/* SC_PLL_IRQ_CONTROL 16bit (R/W) */
#define U300_SYSCON_PICR					(0x0130)
#define U300_SYSCON_PICR_MASK					(0x00FF)
#define U300_SYSCON_PICR_FORCE_PLL208_LOCK_LOW_ENABLE		(0x0080)
#define U300_SYSCON_PICR_FORCE_PLL208_LOCK_HIGH_ENABLE		(0x0040)
#define U300_SYSCON_PICR_FORCE_PLL13_LOCK_LOW_ENABLE		(0x0020)
#define U300_SYSCON_PICR_FORCE_PLL13_LOCK_HIGH_ENABLE		(0x0010)
#define U300_SYSCON_PICR_IRQMASK_PLL13_UNLOCK_ENABLE		(0x0008)
#define U300_SYSCON_PICR_IRQMASK_PLL13_LOCK_ENABLE		(0x0004)
#define U300_SYSCON_PICR_IRQMASK_PLL208_UNLOCK_ENABLE		(0x0002)
#define U300_SYSCON_PICR_IRQMASK_PLL208_LOCK_ENABLE		(0x0001)
/* SC_PLL_IRQ_STATUS 16 bit (R/-) */
#define U300_SYSCON_PISR					(0x0134)
#define U300_SYSCON_PISR_MASK					(0x000F)
#define U300_SYSCON_PISR_PLL13_UNLOCK_IND			(0x0008)
#define U300_SYSCON_PISR_PLL13_LOCK_IND				(0x0004)
#define U300_SYSCON_PISR_PLL208_UNLOCK_IND			(0x0002)
#define U300_SYSCON_PISR_PLL208_LOCK_IND			(0x0001)
/* SC_PLL_IRQ_CLEAR 16 bit (-/W) */
#define U300_SYSCON_PICLR					(0x0138)
#define U300_SYSCON_PICLR_MASK					(0x000F)
#define U300_SYSCON_PICLR_RWMASK				(0x0000)
#define U300_SYSCON_PICLR_PLL13_UNLOCK_SC			(0x0008)
#define U300_SYSCON_PICLR_PLL13_LOCK_SC				(0x0004)
#define U300_SYSCON_PICLR_PLL208_UNLOCK_SC			(0x0002)
#define U300_SYSCON_PICLR_PLL208_LOCK_SC			(0x0001)
/* Clock activity observability register 0 */
#define U300_SYSCON_C0OAR					(0x140)
#define U300_SYSCON_C0OAR_MASK					(0xFFFF)
#define U300_SYSCON_C0OAR_VALUE					(0xFFFF)
#define U300_SYSCON_C0OAR_BT_H_CLK				(0x8000)
#define U300_SYSCON_C0OAR_ASPB_P_CLK				(0x4000)
#define U300_SYSCON_C0OAR_APP_SEMI_H_CLK			(0x2000)
#define U300_SYSCON_C0OAR_APP_SEMI_CLK				(0x1000)
#define U300_SYSCON_C0OAR_APP_MMC_MSPRO_CLK			(0x0800)
#define U300_SYSCON_C0OAR_APP_I2S1_CLK				(0x0400)
#define U300_SYSCON_C0OAR_APP_I2S0_CLK				(0x0200)
#define U300_SYSCON_C0OAR_APP_CPU_CLK				(0x0100)
#define U300_SYSCON_C0OAR_APP_52_CLK				(0x0080)
#define U300_SYSCON_C0OAR_APP_208_CLK				(0x0040)
#define U300_SYSCON_C0OAR_APP_104_CLK				(0x0020)
#define U300_SYSCON_C0OAR_APEX_CLK				(0x0010)
#define U300_SYSCON_C0OAR_AHPB_M_H_CLK				(0x0008)
#define U300_SYSCON_C0OAR_AHB_CLK				(0x0004)
#define U300_SYSCON_C0OAR_AFPB_P_CLK				(0x0002)
#define U300_SYSCON_C0OAR_AAIF_CLK				(0x0001)
/* Clock activity observability register 1 */
#define U300_SYSCON_C1OAR					(0x144)
#define U300_SYSCON_C1OAR_MASK					(0x3FFE)
#define U300_SYSCON_C1OAR_VALUE					(0x3FFE)
#define U300_SYSCON_C1OAR_NFIF_F_CLK				(0x2000)
#define U300_SYSCON_C1OAR_MSPRO_CLK				(0x1000)
#define U300_SYSCON_C1OAR_MMC_P_CLK				(0x0800)
#define U300_SYSCON_C1OAR_MMC_CLK				(0x0400)
#define U300_SYSCON_C1OAR_KP_P_CLK				(0x0200)
#define U300_SYSCON_C1OAR_I2C1_P_CLK				(0x0100)
#define U300_SYSCON_C1OAR_I2C0_P_CLK				(0x0080)
#define U300_SYSCON_C1OAR_GPIO_CLK				(0x0040)
#define U300_SYSCON_C1OAR_EMIF_MPMC_CLK				(0x0020)
#define U300_SYSCON_C1OAR_EMIF_H_CLK				(0x0010)
#define U300_SYSCON_C1OAR_EVHIST_CLK				(0x0008)
#define U300_SYSCON_C1OAR_PPM_CLK				(0x0004)
#define U300_SYSCON_C1OAR_DMA_CLK				(0x0002)
/* Clock activity observability register 2 */
#define U300_SYSCON_C2OAR					(0x148)
#define U300_SYSCON_C2OAR_MASK					(0x0FFF)
#define U300_SYSCON_C2OAR_VALUE					(0x0FFF)
#define U300_SYSCON_C2OAR_XGAM_CDI_CLK				(0x0800)
#define U300_SYSCON_C2OAR_XGAM_CLK				(0x0400)
#define U300_SYSCON_C2OAR_VC_H_CLK				(0x0200)
#define U300_SYSCON_C2OAR_VC_CLK				(0x0100)
#define U300_SYSCON_C2OAR_UA_P_CLK				(0x0080)
#define U300_SYSCON_C2OAR_TMR1_CLK				(0x0040)
#define U300_SYSCON_C2OAR_TMR0_CLK				(0x0020)
#define U300_SYSCON_C2OAR_SPI_P_CLK				(0x0010)
#define U300_SYSCON_C2OAR_PCM_I2S1_CORE_CLK			(0x0008)
#define U300_SYSCON_C2OAR_PCM_I2S1_CLK				(0x0004)
#define U300_SYSCON_C2OAR_PCM_I2S0_CORE_CLK			(0x0002)
#define U300_SYSCON_C2OAR_PCM_I2S0_CLK				(0x0001)


/*
 * The clocking hierarchy currently looks like this.
 * NOTE: the idea is NOT to show how the clocks are routed on the chip!
 * The ideas is to show dependencies, so a clock higher up in the
 * hierarchy has to be on in order for another clock to be on. Now,
 * both CPU and DMA can actually be on top of the hierarchy, and that
 * is not modeled currently. Instead we have the backbone AMBA bus on
 * top. This bus cannot be programmed in any way but conceptually it
 * needs to be active for the bridges and devices to transport data.
 *
 * Please be aware that a few clocks are hw controlled, which mean that
 * the hw itself can turn on/off or change the rate of the clock when
 * needed!
 *
 *  AMBA bus
 *  |
 *  +- CPU
 *  +- FSMC NANDIF NAND Flash interface
 *  +- SEMI Shared Memory interface
 *  +- ISP Image Signal Processor (U335 only)
 *  +- CDS (U335 only)
 *  +- DMA Direct Memory Access Controller
 *  +- AAIF APP/ACC Inteface (Mobile Scalable Link, MSL)
 *  +- APEX
 *  +- VIDEO_ENC AVE2/3 Video Encoder
 *  +- XGAM Graphics Accelerator Controller
 *  +- AHB
 *  |
 *  +- ahb:0 AHB Bridge
 *  |  |
 *  |  +- ahb:1 INTCON Interrupt controller
 *  |  +- ahb:3 MSPRO  Memory Stick Pro controller
 *  |  +- ahb:4 EMIF   External Memory interface
 *  |
 *  +- fast:0 FAST bridge
 *  |  |
 *  |  +- fast:1 MMCSD MMC/SD card reader controller
 *  |  +- fast:2 I2S0  PCM I2S channel 0 controller
 *  |  +- fast:3 I2S1  PCM I2S channel 1 controller
 *  |  +- fast:4 I2C0  I2C channel 0 controller
 *  |  +- fast:5 I2C1  I2C channel 1 controller
 *  |  +- fast:6 SPI   SPI controller
 *  |  +- fast:7 UART1 Secondary UART (U335 only)
 *  |
 *  +- slow:0 SLOW bridge
 *     |
 *     +- slow:1 SYSCON (not possible to control)
 *     +- slow:2 WDOG Watchdog
 *     +- slow:3 UART0 primary UART
 *     +- slow:4 TIMER_APP Application timer - used in Linux
 *     +- slow:5 KEYPAD controller
 *     +- slow:6 GPIO controller
 *     +- slow:7 RTC controller
 *     +- slow:8 BT Bus Tracer (not used currently)
 *     +- slow:9 EH Event Handler (not used currently)
 *     +- slow:a TIMER_ACC Access style timer (not used currently)
 *     +- slow:b PPM (U335 only, what is that?)
 */

/* Global syscon virtual base */
static void __iomem *syscon_vbase;

/**
 * struct clk_syscon - U300 syscon clock
 * @hw: corresponding clock hardware entry
 * @hw_ctrld: whether this clock is hardware controlled (for refcount etc)
 *	and does not need any magic pokes to be enabled/disabled
 * @reset: state holder, whether this block's reset line is asserted or not
 * @res_reg: reset line enable/disable flag register
 * @res_bit: bit for resetting or taking this consumer out of reset
 * @en_reg: clock line enable/disable flag register
 * @en_bit: bit for enabling/disabling this consumer clock line
 * @clk_val: magic value to poke in the register to enable/disable
 *	this one clock
 */
struct clk_syscon {
	struct clk_hw hw;
	bool hw_ctrld;
	bool reset;
	void __iomem *res_reg;
	u8 res_bit;
	void __iomem *en_reg;
	u8 en_bit;
	u16 clk_val;
};

#define to_syscon(_hw) container_of(_hw, struct clk_syscon, hw)

static DEFINE_SPINLOCK(syscon_resetreg_lock);

/*
 * Reset control functions. We remember if a block has been
 * taken out of reset and don't remove the reset assertion again
 * and vice versa. Currently we only remove resets so the
 * enablement function is defined out.
 */
static void syscon_block_reset_enable(struct clk_syscon *sclk)
{
	unsigned long iflags;
	u16 val;

	/* Not all blocks support resetting */
	if (!sclk->res_reg)
		return;
	spin_lock_irqsave(&syscon_resetreg_lock, iflags);
	val = readw(sclk->res_reg);
	val |= BIT(sclk->res_bit);
	writew(val, sclk->res_reg);
	spin_unlock_irqrestore(&syscon_resetreg_lock, iflags);
	sclk->reset = true;
}

static void syscon_block_reset_disable(struct clk_syscon *sclk)
{
	unsigned long iflags;
	u16 val;

	/* Not all blocks support resetting */
	if (!sclk->res_reg)
		return;
	spin_lock_irqsave(&syscon_resetreg_lock, iflags);
	val = readw(sclk->res_reg);
	val &= ~BIT(sclk->res_bit);
	writew(val, sclk->res_reg);
	spin_unlock_irqrestore(&syscon_resetreg_lock, iflags);
	sclk->reset = false;
}

static int syscon_clk_prepare(struct clk_hw *hw)
{
	struct clk_syscon *sclk = to_syscon(hw);

	/* If the block is in reset, bring it out */
	if (sclk->reset)
		syscon_block_reset_disable(sclk);
	return 0;
}

static void syscon_clk_unprepare(struct clk_hw *hw)
{
	struct clk_syscon *sclk = to_syscon(hw);

	/* Please don't force the console into reset */
	if (sclk->clk_val == U300_SYSCON_SBCER_UART_CLK_EN)
		return;
	/* When unpreparing, force block into reset */
	if (!sclk->reset)
		syscon_block_reset_enable(sclk);
}

static int syscon_clk_enable(struct clk_hw *hw)
{
	struct clk_syscon *sclk = to_syscon(hw);

	/* Don't touch the hardware controlled clocks */
	if (sclk->hw_ctrld)
		return 0;
	/* These cannot be controlled */
	if (sclk->clk_val == 0xFFFFU)
		return 0;

	writew(sclk->clk_val, syscon_vbase + U300_SYSCON_SBCER);
	return 0;
}

static void syscon_clk_disable(struct clk_hw *hw)
{
	struct clk_syscon *sclk = to_syscon(hw);

	/* Don't touch the hardware controlled clocks */
	if (sclk->hw_ctrld)
		return;
	if (sclk->clk_val == 0xFFFFU)
		return;
	/* Please don't disable the console port */
	if (sclk->clk_val == U300_SYSCON_SBCER_UART_CLK_EN)
		return;

	writew(sclk->clk_val, syscon_vbase + U300_SYSCON_SBCDR);
}

static int syscon_clk_is_enabled(struct clk_hw *hw)
{
	struct clk_syscon *sclk = to_syscon(hw);
	u16 val;

	/* If no enable register defined, it's always-on */
	if (!sclk->en_reg)
		return 1;

	val = readw(sclk->en_reg);
	val &= BIT(sclk->en_bit);

	return val ? 1 : 0;
}

static u16 syscon_get_perf(void)
{
	u16 val;

	val = readw(syscon_vbase + U300_SYSCON_CCR);
	val &= U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK;
	return val;
}

static unsigned long
syscon_clk_recalc_rate(struct clk_hw *hw,
		       unsigned long parent_rate)
{
	struct clk_syscon *sclk = to_syscon(hw);
	u16 perf = syscon_get_perf();

	switch(sclk->clk_val) {
	case U300_SYSCON_SBCER_FAST_BRIDGE_CLK_EN:
	case U300_SYSCON_SBCER_I2C0_CLK_EN:
	case U300_SYSCON_SBCER_I2C1_CLK_EN:
	case U300_SYSCON_SBCER_MMC_CLK_EN:
	case U300_SYSCON_SBCER_SPI_CLK_EN:
		/* The FAST clocks have one progression */
		switch(perf) {
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
			return 13000000;
		default:
			return parent_rate; /* 26 MHz */
		}
	case U300_SYSCON_SBCER_DMAC_CLK_EN:
	case U300_SYSCON_SBCER_NANDIF_CLK_EN:
	case U300_SYSCON_SBCER_XGAM_CLK_EN:
		/* AMBA interconnect peripherals */
		switch(perf) {
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
			return 6500000;
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
			return 26000000;
		default:
			return parent_rate; /* 52 MHz */
		}
	case U300_SYSCON_SBCER_SEMI_CLK_EN:
	case U300_SYSCON_SBCER_EMIF_CLK_EN:
		/* EMIF speeds */
		switch(perf) {
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
			return 13000000;
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
			return 52000000;
		default:
			return 104000000;
		}
	case U300_SYSCON_SBCER_CPU_CLK_EN:
		/* And the fast CPU clock */
		switch(perf) {
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
			return 13000000;
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
			return 52000000;
		case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
			return 104000000;
		default:
			return parent_rate; /* 208 MHz */
		}
	default:
		/*
		 * The SLOW clocks and default just inherit the rate of
		 * their parent (typically PLL13 13 MHz).
		 */
		return parent_rate;
	}
}

static long
syscon_clk_round_rate(struct clk_hw *hw, unsigned long rate,
		      unsigned long *prate)
{
	struct clk_syscon *sclk = to_syscon(hw);

	if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN)
		return *prate;
	/* We really only support setting the rate of the CPU clock */
	if (rate <= 13000000)
		return 13000000;
	if (rate <= 52000000)
		return 52000000;
	if (rate <= 104000000)
		return 104000000;
	return 208000000;
}

static int syscon_clk_set_rate(struct clk_hw *hw, unsigned long rate,
			       unsigned long parent_rate)
{
	struct clk_syscon *sclk = to_syscon(hw);
	u16 val;

	/* We only support setting the rate of the CPU clock */
	if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN)
		return -EINVAL;
	switch (rate) {
	case 13000000:
		val = U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER;
		break;
	case 52000000:
		val = U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE;
		break;
	case 104000000:
		val = U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH;
		break;
	case 208000000:
		val = U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST;
		break;
	default:
		return -EINVAL;
	}
	val |= readw(syscon_vbase + U300_SYSCON_CCR) &
		~U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK ;
	writew(val, syscon_vbase + U300_SYSCON_CCR);
	return 0;
}

static const struct clk_ops syscon_clk_ops = {
	.prepare = syscon_clk_prepare,
	.unprepare = syscon_clk_unprepare,
	.enable = syscon_clk_enable,
	.disable = syscon_clk_disable,
	.is_enabled = syscon_clk_is_enabled,
	.recalc_rate = syscon_clk_recalc_rate,
	.round_rate = syscon_clk_round_rate,
	.set_rate = syscon_clk_set_rate,
};

static struct clk * __init
syscon_clk_register(struct device *dev, const char *name,
		    const char *parent_name, unsigned long flags,
		    bool hw_ctrld,
		    void __iomem *res_reg, u8 res_bit,
		    void __iomem *en_reg, u8 en_bit,
		    u16 clk_val)
{
	struct clk *clk;
	struct clk_syscon *sclk;
	struct clk_init_data init;

	sclk = kzalloc(sizeof(struct clk_syscon), GFP_KERNEL);
	if (!sclk) {
		pr_err("could not allocate syscon clock %s\n",
			name);
		return ERR_PTR(-ENOMEM);
	}
	init.name = name;
	init.ops = &syscon_clk_ops;
	init.flags = flags;
	init.parent_names = (parent_name ? &parent_name : NULL);
	init.num_parents = (parent_name ? 1 : 0);
	sclk->hw.init = &init;
	sclk->hw_ctrld = hw_ctrld;
	/* Assume the block is in reset at registration */
	sclk->reset = true;
	sclk->res_reg = res_reg;
	sclk->res_bit = res_bit;
	sclk->en_reg = en_reg;
	sclk->en_bit = en_bit;
	sclk->clk_val = clk_val;

	clk = clk_register(dev, &sclk->hw);
	if (IS_ERR(clk))
		kfree(sclk);

	return clk;
}

#define U300_CLK_TYPE_SLOW 0
#define U300_CLK_TYPE_FAST 1
#define U300_CLK_TYPE_REST 2

/**
 * struct u300_clock - defines the bits and pieces for a certain clock
 * @type: the clock type, slow fast or rest
 * @id: the bit in the slow/fast/rest register for this clock
 * @hw_ctrld: whether the clock is hardware controlled
 * @clk_val: a value to poke in the one-write enable/disable registers
 */
struct u300_clock {
	u8 type;
	u8 id;
	bool hw_ctrld;
	u16 clk_val;
};

static struct u300_clock const u300_clk_lookup[] __initconst = {
	{
		.type = U300_CLK_TYPE_REST,
		.id = 3,
		.hw_ctrld = true,
		.clk_val = U300_SYSCON_SBCER_CPU_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_REST,
		.id = 4,
		.hw_ctrld = true,
		.clk_val = U300_SYSCON_SBCER_DMAC_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_REST,
		.id = 5,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_EMIF_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_REST,
		.id = 6,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_NANDIF_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_REST,
		.id = 8,
		.hw_ctrld = true,
		.clk_val = U300_SYSCON_SBCER_XGAM_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_REST,
		.id = 9,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_SEMI_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_REST,
		.id = 10,
		.hw_ctrld = true,
		.clk_val = U300_SYSCON_SBCER_AHB_SUBSYS_BRIDGE_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_REST,
		.id = 12,
		.hw_ctrld = false,
		/* INTCON: cannot be enabled, just taken out of reset */
		.clk_val = 0xFFFFU,
	},
	{
		.type = U300_CLK_TYPE_FAST,
		.id = 0,
		.hw_ctrld = true,
		.clk_val = U300_SYSCON_SBCER_FAST_BRIDGE_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_FAST,
		.id = 1,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_I2C0_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_FAST,
		.id = 2,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_I2C1_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_FAST,
		.id = 5,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_MMC_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_FAST,
		.id = 6,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_SPI_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_SLOW,
		.id = 0,
		.hw_ctrld = true,
		.clk_val = U300_SYSCON_SBCER_SLOW_BRIDGE_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_SLOW,
		.id = 1,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_UART_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_SLOW,
		.id = 4,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_GPIO_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_SLOW,
		.id = 6,
		.hw_ctrld = true,
		/* No clock enable register bit */
		.clk_val = 0xFFFFU,
	},
	{
		.type = U300_CLK_TYPE_SLOW,
		.id = 7,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_APP_TMR_CLK_EN,
	},
	{
		.type = U300_CLK_TYPE_SLOW,
		.id = 8,
		.hw_ctrld = false,
		.clk_val = U300_SYSCON_SBCER_ACC_TMR_CLK_EN,
	},
};

static void __init of_u300_syscon_clk_init(struct device_node *np)
{
	struct clk *clk = ERR_PTR(-EINVAL);
	const char *clk_name = np->name;
	const char *parent_name;
	void __iomem *res_reg;
	void __iomem *en_reg;
	u32 clk_type;
	u32 clk_id;
	int i;

	if (of_property_read_u32(np, "clock-type", &clk_type)) {
		pr_err("%s: syscon clock \"%s\" missing clock-type property\n",
		       __func__, clk_name);
		return;
	}
	if (of_property_read_u32(np, "clock-id", &clk_id)) {
		pr_err("%s: syscon clock \"%s\" missing clock-id property\n",
		       __func__, clk_name);
		return;
	}
	parent_name = of_clk_get_parent_name(np, 0);

	switch (clk_type) {
	case U300_CLK_TYPE_SLOW:
		res_reg = syscon_vbase + U300_SYSCON_RSR;
		en_reg = syscon_vbase + U300_SYSCON_CESR;
		break;
	case U300_CLK_TYPE_FAST:
		res_reg = syscon_vbase + U300_SYSCON_RFR;
		en_reg = syscon_vbase + U300_SYSCON_CEFR;
		break;
	case U300_CLK_TYPE_REST:
		res_reg = syscon_vbase + U300_SYSCON_RRR;
		en_reg = syscon_vbase + U300_SYSCON_CERR;
		break;
	default:
		pr_err("unknown clock type %x specified\n", clk_type);
		return;
	}

	for (i = 0; i < ARRAY_SIZE(u300_clk_lookup); i++) {
		const struct u300_clock *u3clk = &u300_clk_lookup[i];

		if (u3clk->type == clk_type && u3clk->id == clk_id)
			clk = syscon_clk_register(NULL,
						  clk_name, parent_name,
						  0, u3clk->hw_ctrld,
						  res_reg, u3clk->id,
						  en_reg, u3clk->id,
						  u3clk->clk_val);
	}

	if (!IS_ERR(clk)) {
		of_clk_add_provider(np, of_clk_src_simple_get, clk);

		/*
		 * Some few system clocks - device tree does not
		 * represent clocks without a corresponding device node.
		 * for now we add these three clocks here.
		 */
		if (clk_type == U300_CLK_TYPE_REST && clk_id == 5)
			clk_register_clkdev(clk, NULL, "pl172");
		if (clk_type == U300_CLK_TYPE_REST && clk_id == 9)
			clk_register_clkdev(clk, NULL, "semi");
		if (clk_type == U300_CLK_TYPE_REST && clk_id == 12)
			clk_register_clkdev(clk, NULL, "intcon");
	}
}

/**
 * struct clk_mclk - U300 MCLK clock (MMC/SD clock)
 * @hw: corresponding clock hardware entry
 * @is_mspro: if this is the memory stick clock rather than MMC/SD
 */
struct clk_mclk {
	struct clk_hw hw;
	bool is_mspro;
};

#define to_mclk(_hw) container_of(_hw, struct clk_mclk, hw)

static int mclk_clk_prepare(struct clk_hw *hw)
{
	struct clk_mclk *mclk = to_mclk(hw);
	u16 val;

	/* The MMC and MSPRO clocks need some special set-up */
	if (!mclk->is_mspro) {
		/* Set default MMC clock divisor to 18.9 MHz */
		writew(0x0054U, syscon_vbase + U300_SYSCON_MMF0R);
		val = readw(syscon_vbase + U300_SYSCON_MMCR);
		/* Disable the MMC feedback clock */
		val &= ~U300_SYSCON_MMCR_MMC_FB_CLK_SEL_ENABLE;
		/* Disable MSPRO frequency */
		val &= ~U300_SYSCON_MMCR_MSPRO_FREQSEL_ENABLE;
		writew(val, syscon_vbase + U300_SYSCON_MMCR);
	} else {
		val = readw(syscon_vbase + U300_SYSCON_MMCR);
		/* Disable the MMC feedback clock */
		val &= ~U300_SYSCON_MMCR_MMC_FB_CLK_SEL_ENABLE;
		/* Enable MSPRO frequency */
		val |= U300_SYSCON_MMCR_MSPRO_FREQSEL_ENABLE;
		writew(val, syscon_vbase + U300_SYSCON_MMCR);
	}

	return 0;
}

static unsigned long
mclk_clk_recalc_rate(struct clk_hw *hw,
		     unsigned long parent_rate)
{
	u16 perf = syscon_get_perf();

	switch (perf) {
	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
		/*
		 * Here, the 208 MHz PLL gets shut down and the always
		 * on 13 MHz PLL used for RTC etc kicks into use
		 * instead.
		 */
		return 13000000;
	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
	case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
	case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
	case U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST:
	{
		/*
		 * This clock is under program control. The register is
		 * divided in two nybbles, bit 7-4 gives cycles-1 to count
		 * high, bit 3-0 gives cycles-1 to count low. Distribute
		 * these with no more than 1 cycle difference between
		 * low and high and add low and high to get the actual
		 * divisor. The base PLL is 208 MHz. Writing 0x00 will
		 * divide by 1 and 1 so the highest frequency possible
		 * is 104 MHz.
		 *
		 * e.g. 0x54 =>
		 * f = 208 / ((5+1) + (4+1)) = 208 / 11 = 18.9 MHz
		 */
		u16 val = readw(syscon_vbase + U300_SYSCON_MMF0R) &
			U300_SYSCON_MMF0R_MASK;
		switch (val) {
		case 0x0054:
			return 18900000;
		case 0x0044:
			return 20800000;
		case 0x0043:
			return 23100000;
		case 0x0033:
			return 26000000;
		case 0x0032:
			return 29700000;
		case 0x0022:
			return 34700000;
		case 0x0021:
			return 41600000;
		case 0x0011:
			return 52000000;
		case 0x0000:
			return 104000000;
		default:
			break;
		}
	}
	default:
		break;
	}
	return parent_rate;
}

static long
mclk_clk_round_rate(struct clk_hw *hw, unsigned long rate,
		    unsigned long *prate)
{
	if (rate <= 18900000)
		return 18900000;
	if (rate <= 20800000)
		return 20800000;
	if (rate <= 23100000)
		return 23100000;
	if (rate <= 26000000)
		return 26000000;
	if (rate <= 29700000)
		return 29700000;
	if (rate <= 34700000)
		return 34700000;
	if (rate <= 41600000)
		return 41600000;
	/* Highest rate */
	return 52000000;
}

static int mclk_clk_set_rate(struct clk_hw *hw, unsigned long rate,
			     unsigned long parent_rate)
{
	u16 val;
	u16 reg;

	switch (rate) {
	case 18900000:
		val = 0x0054;
		break;
	case 20800000:
		val = 0x0044;
		break;
	case 23100000:
		val = 0x0043;
		break;
	case 26000000:
		val = 0x0033;
		break;
	case 29700000:
		val = 0x0032;
		break;
	case 34700000:
		val = 0x0022;
		break;
	case 41600000:
		val = 0x0021;
		break;
	case 52000000:
		val = 0x0011;
		break;
	case 104000000:
		val = 0x0000;
		break;
	default:
		return -EINVAL;
	}

	reg = readw(syscon_vbase + U300_SYSCON_MMF0R) &
		~U300_SYSCON_MMF0R_MASK;
	writew(reg | val, syscon_vbase + U300_SYSCON_MMF0R);
	return 0;
}

static const struct clk_ops mclk_ops = {
	.prepare = mclk_clk_prepare,
	.recalc_rate = mclk_clk_recalc_rate,
	.round_rate = mclk_clk_round_rate,
	.set_rate = mclk_clk_set_rate,
};

static struct clk * __init
mclk_clk_register(struct device *dev, const char *name,
		  const char *parent_name, bool is_mspro)
{
	struct clk *clk;
	struct clk_mclk *mclk;
	struct clk_init_data init;

	mclk = kzalloc(sizeof(struct clk_mclk), GFP_KERNEL);
	if (!mclk) {
		pr_err("could not allocate MMC/SD clock %s\n",
		       name);
		return ERR_PTR(-ENOMEM);
	}
	init.name = "mclk";
	init.ops = &mclk_ops;
	init.flags = 0;
	init.parent_names = (parent_name ? &parent_name : NULL);
	init.num_parents = (parent_name ? 1 : 0);
	mclk->hw.init = &init;
	mclk->is_mspro = is_mspro;

	clk = clk_register(dev, &mclk->hw);
	if (IS_ERR(clk))
		kfree(mclk);

	return clk;
}

static void __init of_u300_syscon_mclk_init(struct device_node *np)
{
	struct clk *clk = ERR_PTR(-EINVAL);
	const char *clk_name = np->name;
	const char *parent_name;

	parent_name = of_clk_get_parent_name(np, 0);
	clk = mclk_clk_register(NULL, clk_name, parent_name, false);
	if (!IS_ERR(clk))
		of_clk_add_provider(np, of_clk_src_simple_get, clk);
}

static const struct of_device_id u300_clk_match[] __initconst = {
	{
		.compatible = "fixed-clock",
		.data = of_fixed_clk_setup,
	},
	{
		.compatible = "fixed-factor-clock",
		.data = of_fixed_factor_clk_setup,
	},
	{
		.compatible = "stericsson,u300-syscon-clk",
		.data = of_u300_syscon_clk_init,
	},
	{
		.compatible = "stericsson,u300-syscon-mclk",
		.data = of_u300_syscon_mclk_init,
	},
	{}
};


void __init u300_clk_init(void __iomem *base)
{
	u16 val;

	syscon_vbase = base;

	/* Set system to run at PLL208, max performance, a known state. */
	val = readw(syscon_vbase + U300_SYSCON_CCR);
	val &= ~U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK;
	writew(val, syscon_vbase + U300_SYSCON_CCR);
	/* Wait for the PLL208 to lock if not locked in yet */
	while (!(readw(syscon_vbase + U300_SYSCON_CSR) &
		 U300_SYSCON_CSR_PLL208_LOCK_IND));

	/* Power management enable */
	val = readw(syscon_vbase + U300_SYSCON_PMCR);
	val |= U300_SYSCON_PMCR_PWR_MGNT_ENABLE;
	writew(val, syscon_vbase + U300_SYSCON_PMCR);

	of_clk_init(u300_clk_match);
}
OpenPOWER on IntegriCloud