summaryrefslogtreecommitdiff
path: root/drivers/iio/accel/bma180.c
blob: b8a7469cdae4185805d69aebd51a2da47d9e0ba1 (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
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
// SPDX-License-Identifier: GPL-2.0-only
/*
 * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
 *
 * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com>
 *
 * Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net>
 *
 * SPI is not supported by driver
 * BMA023/BMA150/SMB380: 7-bit I2C slave address 0x38
 * BMA180: 7-bit I2C slave address 0x40 or 0x41
 * BMA250: 7-bit I2C slave address 0x18 or 0x19
 * BMA254: 7-bit I2C slave address 0x18 or 0x19
 */

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/bitops.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>

#define BMA180_DRV_NAME "bma180"
#define BMA180_IRQ_NAME "bma180_event"

enum chip_ids {
	BMA023,
	BMA150,
	BMA180,
	BMA250,
	BMA254,
};

struct bma180_data;

struct bma180_part_info {
	u8 chip_id;
	const struct iio_chan_spec *channels;
	unsigned int num_channels;
	const int *scale_table;
	unsigned int num_scales;
	const int *bw_table;
	unsigned int num_bw;
	int temp_offset;

	u8 int_reset_reg, int_reset_mask;
	u8 sleep_reg, sleep_mask;
	u8 bw_reg, bw_mask;
	u8 scale_reg, scale_mask;
	u8 power_reg, power_mask, lowpower_val;
	u8 int_enable_reg, int_enable_mask;
	u8 int_map_reg, int_enable_dataready_int1_mask;
	u8 softreset_reg, softreset_val;

	int (*chip_config)(struct bma180_data *data);
	void (*chip_disable)(struct bma180_data *data);
};

/* Register set */
#define BMA023_CTRL_REG0	0x0a
#define BMA023_CTRL_REG1	0x0b
#define BMA023_CTRL_REG2	0x14
#define BMA023_CTRL_REG3	0x15

#define BMA023_RANGE_MASK	GENMASK(4, 3) /* Range of accel values */
#define BMA023_BW_MASK		GENMASK(2, 0) /* Accel bandwidth */
#define BMA023_SLEEP		BIT(0)
#define BMA023_INT_RESET_MASK	BIT(6)
#define BMA023_NEW_DATA_INT	BIT(5) /* Intr every new accel data is ready */
#define BMA023_RESET_VAL	BIT(1)

#define BMA180_CHIP_ID		0x00 /* Need to distinguish BMA180 from other */
#define BMA180_ACC_X_LSB	0x02 /* First of 6 registers of accel data */
#define BMA180_TEMP		0x08
#define BMA180_CTRL_REG0	0x0d
#define BMA180_RESET		0x10
#define BMA180_BW_TCS		0x20
#define BMA180_CTRL_REG3	0x21
#define BMA180_TCO_Z		0x30
#define BMA180_OFFSET_LSB1	0x35

/* BMA180_CTRL_REG0 bits */
#define BMA180_DIS_WAKE_UP	BIT(0) /* Disable wake up mode */
#define BMA180_SLEEP		BIT(1) /* 1 - chip will sleep */
#define BMA180_EE_W		BIT(4) /* Unlock writing to addr from 0x20 */
#define BMA180_RESET_INT	BIT(6) /* Reset pending interrupts */

/* BMA180_CTRL_REG3 bits */
#define BMA180_NEW_DATA_INT	BIT(1) /* Intr every new accel data is ready */

/* BMA180_OFFSET_LSB1 skipping mode bit */
#define BMA180_SMP_SKIP		BIT(0)

/* Bit masks for registers bit fields */
#define BMA180_RANGE		0x0e /* Range of measured accel values */
#define BMA180_BW		0xf0 /* Accel bandwidth */
#define BMA180_MODE_CONFIG	0x03 /* Config operation modes */

/* We have to write this value in reset register to do soft reset */
#define BMA180_RESET_VAL	0xb6

#define BMA023_ID_REG_VAL	0x02
#define BMA180_ID_REG_VAL	0x03
#define BMA250_ID_REG_VAL	0x03
#define BMA254_ID_REG_VAL	0xfa /* 250 decimal */

/* Chip power modes */
#define BMA180_LOW_POWER	0x03

#define BMA250_RANGE_REG	0x0f
#define BMA250_BW_REG		0x10
#define BMA250_POWER_REG	0x11
#define BMA250_RESET_REG	0x14
#define BMA250_INT_ENABLE_REG	0x17
#define BMA250_INT_MAP_REG	0x1a
#define BMA250_INT_RESET_REG	0x21

#define BMA250_RANGE_MASK	GENMASK(3, 0) /* Range of accel values */
#define BMA250_BW_MASK		GENMASK(4, 0) /* Accel bandwidth */
#define BMA250_SUSPEND_MASK	BIT(7) /* chip will sleep */
#define BMA250_LOWPOWER_MASK	BIT(6)
#define BMA250_DATA_INTEN_MASK	BIT(4)
#define BMA250_INT1_DATA_MASK	BIT(0)
#define BMA250_INT_RESET_MASK	BIT(7) /* Reset pending interrupts */

#define BMA254_RANGE_REG	0x0f
#define BMA254_BW_REG		0x10
#define BMA254_POWER_REG	0x11
#define BMA254_RESET_REG	0x14
#define BMA254_INT_ENABLE_REG	0x17
#define BMA254_INT_MAP_REG	0x1a
#define BMA254_INT_RESET_REG	0x21

#define BMA254_RANGE_MASK	GENMASK(3, 0) /* Range of accel values */
#define BMA254_BW_MASK		GENMASK(4, 0) /* Accel bandwidth */
#define BMA254_SUSPEND_MASK	BIT(7) /* chip will sleep */
#define BMA254_LOWPOWER_MASK	BIT(6)
#define BMA254_DATA_INTEN_MASK	BIT(4)
#define BMA254_INT2_DATA_MASK	BIT(7)
#define BMA254_INT1_DATA_MASK	BIT(0)
#define BMA254_INT_RESET_MASK	BIT(7) /* Reset pending interrupts */

struct bma180_data {
	struct regulator *vdd_supply;
	struct regulator *vddio_supply;
	struct i2c_client *client;
	struct iio_trigger *trig;
	const struct bma180_part_info *part_info;
	struct iio_mount_matrix orientation;
	struct mutex mutex;
	bool sleep_state;
	int scale;
	int bw;
	bool pmode;
	u8 buff[16]; /* 3x 16-bit + 8-bit + padding + timestamp */
};

enum bma180_chan {
	AXIS_X,
	AXIS_Y,
	AXIS_Z,
	TEMP
};

static int bma023_bw_table[] = { 25, 50, 100, 190, 375, 750, 1500 }; /* Hz */
static int bma023_scale_table[] = { 2452, 4903, 9709, };

static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };

static int bma25x_bw_table[] = { 8, 16, 31, 63, 125, 250 }; /* Hz */
static int bma25x_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
	0, 0, 306458 };

static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
{
	int ret;

	if (data->sleep_state)
		return -EBUSY;

	switch (chan) {
	case TEMP:
		ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
		if (ret < 0)
			dev_err(&data->client->dev, "failed to read temp register\n");
		break;
	default:
		ret = i2c_smbus_read_word_data(data->client,
			BMA180_ACC_X_LSB + chan * 2);
		if (ret < 0)
			dev_err(&data->client->dev,
				"failed to read accel_%c register\n",
				'x' + chan);
	}

	return ret;
}

static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
{
	int ret = i2c_smbus_read_byte_data(data->client, reg);
	u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));

	if (ret < 0)
		return ret;

	return i2c_smbus_write_byte_data(data->client, reg, reg_val);
}

static int bma180_reset_intr(struct bma180_data *data)
{
	int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
		data->part_info->int_reset_mask, 1);

	if (ret)
		dev_err(&data->client->dev, "failed to reset interrupt\n");

	return ret;
}

static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
{
	int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
			data->part_info->int_enable_mask, state);
	if (ret)
		goto err;
	ret = bma180_reset_intr(data);
	if (ret)
		goto err;

	return 0;

err:
	dev_err(&data->client->dev,
		"failed to set new data interrupt state %d\n", state);
	return ret;
}

static int bma180_set_sleep_state(struct bma180_data *data, bool state)
{
	int ret = bma180_set_bits(data, data->part_info->sleep_reg,
		data->part_info->sleep_mask, state);

	if (ret) {
		dev_err(&data->client->dev,
			"failed to set sleep state %d\n", state);
		return ret;
	}
	data->sleep_state = state;

	return 0;
}

static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
{
	int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);

	if (ret)
		dev_err(&data->client->dev,
			"failed to set ee writing state %d\n", state);

	return ret;
}

static int bma180_set_bw(struct bma180_data *data, int val)
{
	int ret, i;

	if (data->sleep_state)
		return -EBUSY;

	for (i = 0; i < data->part_info->num_bw; ++i) {
		if (data->part_info->bw_table[i] == val) {
			ret = bma180_set_bits(data, data->part_info->bw_reg,
				data->part_info->bw_mask, i);
			if (ret) {
				dev_err(&data->client->dev,
					"failed to set bandwidth\n");
				return ret;
			}
			data->bw = val;
			return 0;
		}
	}

	return -EINVAL;
}

static int bma180_set_scale(struct bma180_data *data, int val)
{
	int ret, i;

	if (data->sleep_state)
		return -EBUSY;

	for (i = 0; i < data->part_info->num_scales; ++i)
		if (data->part_info->scale_table[i] == val) {
			ret = bma180_set_bits(data, data->part_info->scale_reg,
				data->part_info->scale_mask, i);
			if (ret) {
				dev_err(&data->client->dev,
					"failed to set scale\n");
				return ret;
			}
			data->scale = val;
			return 0;
		}

	return -EINVAL;
}

static int bma180_set_pmode(struct bma180_data *data, bool mode)
{
	u8 reg_val = mode ? data->part_info->lowpower_val : 0;
	int ret = bma180_set_bits(data, data->part_info->power_reg,
		data->part_info->power_mask, reg_val);

	if (ret) {
		dev_err(&data->client->dev, "failed to set power mode\n");
		return ret;
	}
	data->pmode = mode;

	return 0;
}

static int bma180_soft_reset(struct bma180_data *data)
{
	int ret = i2c_smbus_write_byte_data(data->client,
		data->part_info->softreset_reg,
		data->part_info->softreset_val);

	if (ret)
		dev_err(&data->client->dev, "failed to reset the chip\n");

	return ret;
}

static int bma180_chip_init(struct bma180_data *data)
{
	/* Try to read chip_id register. It must return 0x03. */
	int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);

	if (ret < 0)
		return ret;
	if (ret != data->part_info->chip_id) {
		dev_err(&data->client->dev, "wrong chip ID %d expected %d\n",
			ret, data->part_info->chip_id);
		return -ENODEV;
	}

	ret = bma180_soft_reset(data);
	if (ret)
		return ret;
	/*
	 * No serial transaction should occur within minimum 10 us
	 * after soft_reset command
	 */
	msleep(20);

	return bma180_set_new_data_intr_state(data, false);
}

static int bma023_chip_config(struct bma180_data *data)
{
	int ret = bma180_chip_init(data);

	if (ret)
		goto err;

	ret = bma180_set_bw(data, 50); /* 50 Hz */
	if (ret)
		goto err;
	ret = bma180_set_scale(data, 2452); /* 2 G */
	if (ret)
		goto err;

	return 0;

err:
	dev_err(&data->client->dev, "failed to config the chip\n");
	return ret;
}

static int bma180_chip_config(struct bma180_data *data)
{
	int ret = bma180_chip_init(data);

	if (ret)
		goto err;
	ret = bma180_set_pmode(data, false);
	if (ret)
		goto err;
	ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
	if (ret)
		goto err;
	ret = bma180_set_ee_writing_state(data, true);
	if (ret)
		goto err;
	ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
	if (ret)
		goto err;
	ret = bma180_set_bw(data, 20); /* 20 Hz */
	if (ret)
		goto err;
	ret = bma180_set_scale(data, 2452); /* 2 G */
	if (ret)
		goto err;

	return 0;

err:
	dev_err(&data->client->dev, "failed to config the chip\n");
	return ret;
}

static int bma25x_chip_config(struct bma180_data *data)
{
	int ret = bma180_chip_init(data);

	if (ret)
		goto err;
	ret = bma180_set_pmode(data, false);
	if (ret)
		goto err;
	ret = bma180_set_bw(data, 16); /* 16 Hz */
	if (ret)
		goto err;
	ret = bma180_set_scale(data, 38344); /* 2 G */
	if (ret)
		goto err;
	/*
	 * This enables dataready interrupt on the INT1 pin
	 * FIXME: support using the INT2 pin
	 */
	ret = bma180_set_bits(data, data->part_info->int_map_reg,
		data->part_info->int_enable_dataready_int1_mask, 1);
	if (ret)
		goto err;

	return 0;

err:
	dev_err(&data->client->dev, "failed to config the chip\n");
	return ret;
}

static void bma023_chip_disable(struct bma180_data *data)
{
	if (bma180_set_sleep_state(data, true))
		goto err;

	return;

err:
	dev_err(&data->client->dev, "failed to disable the chip\n");
}

static void bma180_chip_disable(struct bma180_data *data)
{
	if (bma180_set_new_data_intr_state(data, false))
		goto err;
	if (bma180_set_ee_writing_state(data, false))
		goto err;
	if (bma180_set_sleep_state(data, true))
		goto err;

	return;

err:
	dev_err(&data->client->dev, "failed to disable the chip\n");
}

static void bma25x_chip_disable(struct bma180_data *data)
{
	if (bma180_set_new_data_intr_state(data, false))
		goto err;
	if (bma180_set_sleep_state(data, true))
		goto err;

	return;

err:
	dev_err(&data->client->dev, "failed to disable the chip\n");
}

static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n,
				 bool micros)
{
	size_t len = 0;
	int i;

	for (i = 0; i < n; i++) {
		if (!vals[i])
			continue;
		len += scnprintf(buf + len, PAGE_SIZE - len,
			micros ? "0.%06d " : "%d ", vals[i]);
	}
	buf[len - 1] = '\n';

	return len;
}

static ssize_t bma180_show_filter_freq_avail(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));

	return bma180_show_avail(buf, data->part_info->bw_table,
		data->part_info->num_bw, false);
}

static ssize_t bma180_show_scale_avail(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));

	return bma180_show_avail(buf, data->part_info->scale_table,
		data->part_info->num_scales, true);
}

static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
	S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);

static IIO_DEVICE_ATTR(in_accel_scale_available,
	S_IRUGO, bma180_show_scale_avail, NULL, 0);

static struct attribute *bma180_attributes[] = {
	&iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
		dev_attr.attr,
	&iio_dev_attr_in_accel_scale_available.dev_attr.attr,
	NULL,
};

static const struct attribute_group bma180_attrs_group = {
	.attrs = bma180_attributes,
};

static int bma180_read_raw(struct iio_dev *indio_dev,
		struct iio_chan_spec const *chan, int *val, int *val2,
		long mask)
{
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
		ret = iio_device_claim_direct_mode(indio_dev);
		if (ret)
			return ret;

		mutex_lock(&data->mutex);
		ret = bma180_get_data_reg(data, chan->scan_index);
		mutex_unlock(&data->mutex);
		iio_device_release_direct_mode(indio_dev);
		if (ret < 0)
			return ret;
		if (chan->scan_type.sign == 's') {
			*val = sign_extend32(ret >> chan->scan_type.shift,
				chan->scan_type.realbits - 1);
		} else {
			*val = ret;
		}
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
		*val = data->bw;
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_ACCEL:
			*val = 0;
			*val2 = data->scale;
			return IIO_VAL_INT_PLUS_MICRO;
		case IIO_TEMP:
			*val = 500;
			return IIO_VAL_INT;
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_OFFSET:
		*val = data->part_info->temp_offset;
		return IIO_VAL_INT;
	default:
		return -EINVAL;
	}
}

static int bma180_write_raw(struct iio_dev *indio_dev,
		struct iio_chan_spec const *chan, int val, int val2, long mask)
{
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	switch (mask) {
	case IIO_CHAN_INFO_SCALE:
		if (val)
			return -EINVAL;
		mutex_lock(&data->mutex);
		ret = bma180_set_scale(data, val2);
		mutex_unlock(&data->mutex);
		return ret;
	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
		if (val2)
			return -EINVAL;
		mutex_lock(&data->mutex);
		ret = bma180_set_bw(data, val);
		mutex_unlock(&data->mutex);
		return ret;
	default:
		return -EINVAL;
	}
}

static const struct iio_info bma180_info = {
	.attrs			= &bma180_attrs_group,
	.read_raw		= bma180_read_raw,
	.write_raw		= bma180_write_raw,
};

static const char * const bma180_power_modes[] = { "low_noise", "low_power" };

static int bma180_get_power_mode(struct iio_dev *indio_dev,
		const struct iio_chan_spec *chan)
{
	struct bma180_data *data = iio_priv(indio_dev);

	return data->pmode;
}

static int bma180_set_power_mode(struct iio_dev *indio_dev,
		const struct iio_chan_spec *chan, unsigned int mode)
{
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	mutex_lock(&data->mutex);
	ret = bma180_set_pmode(data, mode);
	mutex_unlock(&data->mutex);

	return ret;
}

static const struct iio_mount_matrix *
bma180_accel_get_mount_matrix(const struct iio_dev *indio_dev,
				const struct iio_chan_spec *chan)
{
	struct bma180_data *data = iio_priv(indio_dev);

	return &data->orientation;
}

static const struct iio_enum bma180_power_mode_enum = {
	.items = bma180_power_modes,
	.num_items = ARRAY_SIZE(bma180_power_modes),
	.get = bma180_get_power_mode,
	.set = bma180_set_power_mode,
};

static const struct iio_chan_spec_ext_info bma023_ext_info[] = {
	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
	{ }
};

static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
	IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum),
	IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
	{ }
};

#define BMA023_ACC_CHANNEL(_axis, _bits) {				\
	.type = IIO_ACCEL,						\
	.modified = 1,							\
	.channel2 = IIO_MOD_##_axis,					\
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
		BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),	\
	.scan_index = AXIS_##_axis,					\
	.scan_type = {							\
		.sign = 's',						\
		.realbits = _bits,					\
		.storagebits = 16,					\
		.shift = 16 - _bits,					\
	},								\
	.ext_info = bma023_ext_info,					\
}

#define BMA150_TEMP_CHANNEL {						\
	.type = IIO_TEMP,						\
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
		BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),	\
	.scan_index = TEMP,						\
	.scan_type = {							\
		.sign = 'u',						\
		.realbits = 8,						\
		.storagebits = 16,					\
	},								\
}

#define BMA180_ACC_CHANNEL(_axis, _bits) {				\
	.type = IIO_ACCEL,						\
	.modified = 1,							\
	.channel2 = IIO_MOD_##_axis,					\
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
		BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),	\
	.scan_index = AXIS_##_axis,					\
	.scan_type = {							\
		.sign = 's',						\
		.realbits = _bits,					\
		.storagebits = 16,					\
		.shift = 16 - _bits,					\
	},								\
	.ext_info = bma180_ext_info,					\
}

#define BMA180_TEMP_CHANNEL {						\
	.type = IIO_TEMP,						\
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
		BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),	\
	.scan_index = TEMP,						\
	.scan_type = {							\
		.sign = 's',						\
		.realbits = 8,						\
		.storagebits = 16,					\
	},								\
}

static const struct iio_chan_spec bma023_channels[] = {
	BMA023_ACC_CHANNEL(X, 10),
	BMA023_ACC_CHANNEL(Y, 10),
	BMA023_ACC_CHANNEL(Z, 10),
	IIO_CHAN_SOFT_TIMESTAMP(4),
};

static const struct iio_chan_spec bma150_channels[] = {
	BMA023_ACC_CHANNEL(X, 10),
	BMA023_ACC_CHANNEL(Y, 10),
	BMA023_ACC_CHANNEL(Z, 10),
	BMA150_TEMP_CHANNEL,
	IIO_CHAN_SOFT_TIMESTAMP(4),
};

static const struct iio_chan_spec bma180_channels[] = {
	BMA180_ACC_CHANNEL(X, 14),
	BMA180_ACC_CHANNEL(Y, 14),
	BMA180_ACC_CHANNEL(Z, 14),
	BMA180_TEMP_CHANNEL,
	IIO_CHAN_SOFT_TIMESTAMP(4),
};

static const struct iio_chan_spec bma250_channels[] = {
	BMA180_ACC_CHANNEL(X, 10),
	BMA180_ACC_CHANNEL(Y, 10),
	BMA180_ACC_CHANNEL(Z, 10),
	BMA180_TEMP_CHANNEL,
	IIO_CHAN_SOFT_TIMESTAMP(4),
};

static const struct iio_chan_spec bma254_channels[] = {
	BMA180_ACC_CHANNEL(X, 12),
	BMA180_ACC_CHANNEL(Y, 12),
	BMA180_ACC_CHANNEL(Z, 12),
	BMA180_TEMP_CHANNEL,
	IIO_CHAN_SOFT_TIMESTAMP(4),
};

static const struct bma180_part_info bma180_part_info[] = {
	[BMA023] = {
		.chip_id = BMA023_ID_REG_VAL,
		.channels = bma023_channels,
		.num_channels = ARRAY_SIZE(bma023_channels),
		.scale_table = bma023_scale_table,
		.num_scales = ARRAY_SIZE(bma023_scale_table),
		.bw_table = bma023_bw_table,
		.num_bw = ARRAY_SIZE(bma023_bw_table),
		/* No temperature channel */
		.temp_offset = 0,
		.int_reset_reg = BMA023_CTRL_REG0,
		.int_reset_mask = BMA023_INT_RESET_MASK,
		.sleep_reg = BMA023_CTRL_REG0,
		.sleep_mask = BMA023_SLEEP,
		.bw_reg = BMA023_CTRL_REG2,
		.bw_mask = BMA023_BW_MASK,
		.scale_reg = BMA023_CTRL_REG2,
		.scale_mask = BMA023_RANGE_MASK,
		/* No power mode on bma023 */
		.power_reg = 0,
		.power_mask = 0,
		.lowpower_val = 0,
		.int_enable_reg = BMA023_CTRL_REG3,
		.int_enable_mask = BMA023_NEW_DATA_INT,
		.softreset_reg = BMA023_CTRL_REG0,
		.softreset_val = BMA023_RESET_VAL,
		.chip_config = bma023_chip_config,
		.chip_disable = bma023_chip_disable,
	},
	[BMA150] = {
		.chip_id = BMA023_ID_REG_VAL,
		.channels = bma150_channels,
		.num_channels = ARRAY_SIZE(bma150_channels),
		.scale_table = bma023_scale_table,
		.num_scales = ARRAY_SIZE(bma023_scale_table),
		.bw_table = bma023_bw_table,
		.num_bw = ARRAY_SIZE(bma023_bw_table),
		.temp_offset = -60, /* 0 LSB @ -30 degree C */
		.int_reset_reg = BMA023_CTRL_REG0,
		.int_reset_mask = BMA023_INT_RESET_MASK,
		.sleep_reg = BMA023_CTRL_REG0,
		.sleep_mask = BMA023_SLEEP,
		.bw_reg = BMA023_CTRL_REG2,
		.bw_mask = BMA023_BW_MASK,
		.scale_reg = BMA023_CTRL_REG2,
		.scale_mask = BMA023_RANGE_MASK,
		/* No power mode on bma150 */
		.power_reg = 0,
		.power_mask = 0,
		.lowpower_val = 0,
		.int_enable_reg = BMA023_CTRL_REG3,
		.int_enable_mask = BMA023_NEW_DATA_INT,
		.softreset_reg = BMA023_CTRL_REG0,
		.softreset_val = BMA023_RESET_VAL,
		.chip_config = bma023_chip_config,
		.chip_disable = bma023_chip_disable,
	},
	[BMA180] = {
		.chip_id = BMA180_ID_REG_VAL,
		.channels = bma180_channels,
		.num_channels = ARRAY_SIZE(bma180_channels),
		.scale_table = bma180_scale_table,
		.num_scales = ARRAY_SIZE(bma180_scale_table),
		.bw_table = bma180_bw_table,
		.num_bw = ARRAY_SIZE(bma180_bw_table),
		.temp_offset = 48, /* 0 LSB @ 24 degree C */
		.int_reset_reg = BMA180_CTRL_REG0,
		.int_reset_mask = BMA180_RESET_INT,
		.sleep_reg = BMA180_CTRL_REG0,
		.sleep_mask = BMA180_SLEEP,
		.bw_reg = BMA180_BW_TCS,
		.bw_mask = BMA180_BW,
		.scale_reg = BMA180_OFFSET_LSB1,
		.scale_mask = BMA180_RANGE,
		.power_reg = BMA180_TCO_Z,
		.power_mask = BMA180_MODE_CONFIG,
		.lowpower_val = BMA180_LOW_POWER,
		.int_enable_reg = BMA180_CTRL_REG3,
		.int_enable_mask = BMA180_NEW_DATA_INT,
		.softreset_reg = BMA180_RESET,
		.softreset_val = BMA180_RESET_VAL,
		.chip_config = bma180_chip_config,
		.chip_disable = bma180_chip_disable,
	},
	[BMA250] = {
		.chip_id = BMA250_ID_REG_VAL,
		.channels = bma250_channels,
		.num_channels = ARRAY_SIZE(bma250_channels),
		.scale_table = bma25x_scale_table,
		.num_scales = ARRAY_SIZE(bma25x_scale_table),
		.bw_table = bma25x_bw_table,
		.num_bw = ARRAY_SIZE(bma25x_bw_table),
		.temp_offset = 48, /* 0 LSB @ 24 degree C */
		.int_reset_reg = BMA250_INT_RESET_REG,
		.int_reset_mask = BMA250_INT_RESET_MASK,
		.sleep_reg = BMA250_POWER_REG,
		.sleep_mask = BMA250_SUSPEND_MASK,
		.bw_reg = BMA250_BW_REG,
		.bw_mask = BMA250_BW_MASK,
		.scale_reg = BMA250_RANGE_REG,
		.scale_mask = BMA250_RANGE_MASK,
		.power_reg = BMA250_POWER_REG,
		.power_mask = BMA250_LOWPOWER_MASK,
		.lowpower_val = 1,
		.int_enable_reg = BMA250_INT_ENABLE_REG,
		.int_enable_mask = BMA250_DATA_INTEN_MASK,
		.int_map_reg = BMA250_INT_MAP_REG,
		.int_enable_dataready_int1_mask = BMA250_INT1_DATA_MASK,
		.softreset_reg = BMA250_RESET_REG,
		.softreset_val = BMA180_RESET_VAL,
		.chip_config = bma25x_chip_config,
		.chip_disable = bma25x_chip_disable,
	},
	[BMA254] = {
		.chip_id = BMA254_ID_REG_VAL,
		.channels = bma254_channels,
		.num_channels = ARRAY_SIZE(bma254_channels),
		.scale_table = bma25x_scale_table,
		.num_scales = ARRAY_SIZE(bma25x_scale_table),
		.bw_table = bma25x_bw_table,
		.num_bw = ARRAY_SIZE(bma25x_bw_table),
		.temp_offset = 46, /* 0 LSB @ 23 degree C */
		.int_reset_reg = BMA254_INT_RESET_REG,
		.int_reset_mask = BMA254_INT_RESET_MASK,
		.sleep_reg = BMA254_POWER_REG,
		.sleep_mask = BMA254_SUSPEND_MASK,
		.bw_reg = BMA254_BW_REG,
		.bw_mask = BMA254_BW_MASK,
		.scale_reg = BMA254_RANGE_REG,
		.scale_mask = BMA254_RANGE_MASK,
		.power_reg = BMA254_POWER_REG,
		.power_mask = BMA254_LOWPOWER_MASK,
		.lowpower_val = 1,
		.int_enable_reg = BMA254_INT_ENABLE_REG,
		.int_enable_mask = BMA254_DATA_INTEN_MASK,
		.int_map_reg = BMA254_INT_MAP_REG,
		.int_enable_dataready_int1_mask = BMA254_INT1_DATA_MASK,
		.softreset_reg = BMA254_RESET_REG,
		.softreset_val = BMA180_RESET_VAL,
		.chip_config = bma25x_chip_config,
		.chip_disable = bma25x_chip_disable,
	},
};

static irqreturn_t bma180_trigger_handler(int irq, void *p)
{
	struct iio_poll_func *pf = p;
	struct iio_dev *indio_dev = pf->indio_dev;
	struct bma180_data *data = iio_priv(indio_dev);
	s64 time_ns = iio_get_time_ns(indio_dev);
	int bit, ret, i = 0;

	mutex_lock(&data->mutex);

	for_each_set_bit(bit, indio_dev->active_scan_mask,
			 indio_dev->masklength) {
		ret = bma180_get_data_reg(data, bit);
		if (ret < 0) {
			mutex_unlock(&data->mutex);
			goto err;
		}
		((s16 *)data->buff)[i++] = ret;
	}

	mutex_unlock(&data->mutex);

	iio_push_to_buffers_with_timestamp(indio_dev, data->buff, time_ns);
err:
	iio_trigger_notify_done(indio_dev->trig);

	return IRQ_HANDLED;
}

static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
		bool state)
{
	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
	struct bma180_data *data = iio_priv(indio_dev);

	return bma180_set_new_data_intr_state(data, state);
}

static void bma180_trig_reen(struct iio_trigger *trig)
{
	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	ret = bma180_reset_intr(data);
	if (ret)
		dev_err(&data->client->dev, "failed to reset interrupt\n");
}

static const struct iio_trigger_ops bma180_trigger_ops = {
	.set_trigger_state = bma180_data_rdy_trigger_set_state,
	.reenable = bma180_trig_reen,
};

static int bma180_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct bma180_data *data;
	struct iio_dev *indio_dev;
	enum chip_ids chip;
	int ret;

	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
	if (!indio_dev)
		return -ENOMEM;

	data = iio_priv(indio_dev);
	i2c_set_clientdata(client, indio_dev);
	data->client = client;
	if (client->dev.of_node)
		chip = (enum chip_ids)of_device_get_match_data(dev);
	else
		chip = id->driver_data;
	data->part_info = &bma180_part_info[chip];

	ret = iio_read_mount_matrix(dev, "mount-matrix",
				&data->orientation);
	if (ret)
		return ret;

	data->vdd_supply = devm_regulator_get(dev, "vdd");
	if (IS_ERR(data->vdd_supply))
		return dev_err_probe(dev, PTR_ERR(data->vdd_supply),
				     "Failed to get vdd regulator\n");

	data->vddio_supply = devm_regulator_get(dev, "vddio");
	if (IS_ERR(data->vddio_supply))
		return dev_err_probe(dev, PTR_ERR(data->vddio_supply),
				     "Failed to get vddio regulator\n");

	/* Typical voltage 2.4V these are min and max */
	ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000);
	if (ret)
		return ret;
	ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000);
	if (ret)
		return ret;
	ret = regulator_enable(data->vdd_supply);
	if (ret) {
		dev_err(dev, "Failed to enable vdd regulator: %d\n", ret);
		return ret;
	}
	ret = regulator_enable(data->vddio_supply);
	if (ret) {
		dev_err(dev, "Failed to enable vddio regulator: %d\n", ret);
		goto err_disable_vdd;
	}
	/* Wait to make sure we started up properly (3 ms at least) */
	usleep_range(3000, 5000);

	ret = data->part_info->chip_config(data);
	if (ret < 0)
		goto err_chip_disable;

	mutex_init(&data->mutex);
	indio_dev->channels = data->part_info->channels;
	indio_dev->num_channels = data->part_info->num_channels;
	indio_dev->name = id->name;
	indio_dev->modes = INDIO_DIRECT_MODE;
	indio_dev->info = &bma180_info;

	if (client->irq > 0) {
		data->trig = iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
			indio_dev->id);
		if (!data->trig) {
			ret = -ENOMEM;
			goto err_chip_disable;
		}

		ret = devm_request_irq(dev, client->irq,
			iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
			"bma180_event", data->trig);
		if (ret) {
			dev_err(dev, "unable to request IRQ\n");
			goto err_trigger_free;
		}

		data->trig->ops = &bma180_trigger_ops;
		iio_trigger_set_drvdata(data->trig, indio_dev);
		indio_dev->trig = iio_trigger_get(data->trig);

		ret = iio_trigger_register(data->trig);
		if (ret)
			goto err_trigger_free;
	}

	ret = iio_triggered_buffer_setup(indio_dev, NULL,
			bma180_trigger_handler, NULL);
	if (ret < 0) {
		dev_err(dev, "unable to setup iio triggered buffer\n");
		goto err_trigger_unregister;
	}

	ret = iio_device_register(indio_dev);
	if (ret < 0) {
		dev_err(dev, "unable to register iio device\n");
		goto err_buffer_cleanup;
	}

	return 0;

err_buffer_cleanup:
	iio_triggered_buffer_cleanup(indio_dev);
err_trigger_unregister:
	if (data->trig)
		iio_trigger_unregister(data->trig);
err_trigger_free:
	iio_trigger_free(data->trig);
err_chip_disable:
	data->part_info->chip_disable(data);
	regulator_disable(data->vddio_supply);
err_disable_vdd:
	regulator_disable(data->vdd_supply);

	return ret;
}

static int bma180_remove(struct i2c_client *client)
{
	struct iio_dev *indio_dev = i2c_get_clientdata(client);
	struct bma180_data *data = iio_priv(indio_dev);

	iio_device_unregister(indio_dev);
	iio_triggered_buffer_cleanup(indio_dev);
	if (data->trig) {
		iio_trigger_unregister(data->trig);
		iio_trigger_free(data->trig);
	}

	mutex_lock(&data->mutex);
	data->part_info->chip_disable(data);
	mutex_unlock(&data->mutex);
	regulator_disable(data->vddio_supply);
	regulator_disable(data->vdd_supply);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int bma180_suspend(struct device *dev)
{
	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	mutex_lock(&data->mutex);
	ret = bma180_set_sleep_state(data, true);
	mutex_unlock(&data->mutex);

	return ret;
}

static int bma180_resume(struct device *dev)
{
	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
	struct bma180_data *data = iio_priv(indio_dev);
	int ret;

	mutex_lock(&data->mutex);
	ret = bma180_set_sleep_state(data, false);
	mutex_unlock(&data->mutex);

	return ret;
}

static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
#define BMA180_PM_OPS (&bma180_pm_ops)
#else
#define BMA180_PM_OPS NULL
#endif

static const struct i2c_device_id bma180_ids[] = {
	{ "bma023", BMA023 },
	{ "bma150", BMA150 },
	{ "bma180", BMA180 },
	{ "bma250", BMA250 },
	{ "bma254", BMA254 },
	{ "smb380", BMA150 },
	{ }
};

MODULE_DEVICE_TABLE(i2c, bma180_ids);

static const struct of_device_id bma180_of_match[] = {
	{
		.compatible = "bosch,bma023",
		.data = (void *)BMA023
	},
	{
		.compatible = "bosch,bma150",
		.data = (void *)BMA150
	},
	{
		.compatible = "bosch,bma180",
		.data = (void *)BMA180
	},
	{
		.compatible = "bosch,bma250",
		.data = (void *)BMA250
	},
	{
		.compatible = "bosch,bma254",
		.data = (void *)BMA254
	},
	{
		.compatible = "bosch,smb380",
		.data = (void *)BMA150
	},
	{ }
};
MODULE_DEVICE_TABLE(of, bma180_of_match);

static struct i2c_driver bma180_driver = {
	.driver = {
		.name	= "bma180",
		.pm	= BMA180_PM_OPS,
		.of_match_table = bma180_of_match,
	},
	.probe		= bma180_probe,
	.remove		= bma180_remove,
	.id_table	= bma180_ids,
};

module_i2c_driver(bma180_driver);

MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
MODULE_AUTHOR("Texas Instruments, Inc.");
MODULE_DESCRIPTION("Bosch BMA023/BMA1x0/BMA25x triaxial acceleration sensor");
MODULE_LICENSE("GPL");