1 // SPDX-License-Identifier: GPL-2.0-only
3 * STMicroelectronics accelerometers driver
5 * Copyright 2012-2013 STMicroelectronics Inc.
7 * Denis Ciocca <denis.ciocca@st.com>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/mutex.h>
13 #include <linux/sysfs.h>
14 #include <linux/slab.h>
15 #include <linux/acpi.h>
16 #include <linux/iio/iio.h>
17 #include <linux/iio/sysfs.h>
18 #include <linux/iio/trigger.h>
20 #include <linux/iio/common/st_sensors.h>
23 #define ST_ACCEL_NUMBER_DATA_CHANNELS 3
25 /* DEFAULT VALUE FOR SENSORS */
26 #define ST_ACCEL_DEFAULT_OUT_X_L_ADDR 0x28
27 #define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR 0x2a
28 #define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR 0x2c
31 #define ST_ACCEL_FS_AVL_2G 2
32 #define ST_ACCEL_FS_AVL_4G 4
33 #define ST_ACCEL_FS_AVL_6G 6
34 #define ST_ACCEL_FS_AVL_8G 8
35 #define ST_ACCEL_FS_AVL_16G 16
36 #define ST_ACCEL_FS_AVL_100G 100
37 #define ST_ACCEL_FS_AVL_200G 200
38 #define ST_ACCEL_FS_AVL_400G 400
40 static const struct iio_mount_matrix *
41 st_accel_get_mount_matrix(const struct iio_dev *indio_dev,
42 const struct iio_chan_spec *chan)
44 struct st_sensor_data *adata = iio_priv(indio_dev);
46 return &adata->mount_matrix;
49 static const struct iio_chan_spec_ext_info st_accel_mount_matrix_ext_info[] = {
50 IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, st_accel_get_mount_matrix),
54 static const struct iio_chan_spec st_accel_8bit_channels[] = {
55 ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
56 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
57 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 8, 8,
58 ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1,
59 st_accel_mount_matrix_ext_info),
60 ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
61 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
62 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 8, 8,
63 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1,
64 st_accel_mount_matrix_ext_info),
65 ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
66 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
67 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 8, 8,
68 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1,
69 st_accel_mount_matrix_ext_info),
70 IIO_CHAN_SOFT_TIMESTAMP(3)
73 static const struct iio_chan_spec st_accel_12bit_channels[] = {
74 ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
75 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
76 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
77 ST_ACCEL_DEFAULT_OUT_X_L_ADDR,
78 st_accel_mount_matrix_ext_info),
79 ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
80 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
81 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
82 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR,
83 st_accel_mount_matrix_ext_info),
84 ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
85 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
86 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
87 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR,
88 st_accel_mount_matrix_ext_info),
89 IIO_CHAN_SOFT_TIMESTAMP(3)
92 static const struct iio_chan_spec st_accel_16bit_channels[] = {
93 ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
94 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
95 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
96 ST_ACCEL_DEFAULT_OUT_X_L_ADDR,
97 st_accel_mount_matrix_ext_info),
98 ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
99 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
100 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
101 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR,
102 st_accel_mount_matrix_ext_info),
103 ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
104 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
105 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
106 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR,
107 st_accel_mount_matrix_ext_info),
108 IIO_CHAN_SOFT_TIMESTAMP(3)
111 static const struct st_sensor_settings st_accel_sensors_settings[] = {
114 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
115 .sensors_supported = {
116 [0] = LIS3DH_ACCEL_DEV_NAME,
117 [1] = LSM303DLHC_ACCEL_DEV_NAME,
118 [2] = LSM330D_ACCEL_DEV_NAME,
119 [3] = LSM330DL_ACCEL_DEV_NAME,
120 [4] = LSM330DLC_ACCEL_DEV_NAME,
121 [5] = LSM303AGR_ACCEL_DEV_NAME,
122 [6] = LIS2DH12_ACCEL_DEV_NAME,
123 [7] = LIS3DE_ACCEL_DEV_NAME,
125 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
130 { .hz = 1, .value = 0x01, },
131 { .hz = 10, .value = 0x02, },
132 { .hz = 25, .value = 0x03, },
133 { .hz = 50, .value = 0x04, },
134 { .hz = 100, .value = 0x05, },
135 { .hz = 200, .value = 0x06, },
136 { .hz = 400, .value = 0x07, },
137 { .hz = 1600, .value = 0x08, },
143 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
146 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
147 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
154 .num = ST_ACCEL_FS_AVL_2G,
156 .gain = IIO_G_TO_M_S_2(1000),
159 .num = ST_ACCEL_FS_AVL_4G,
161 .gain = IIO_G_TO_M_S_2(2000),
164 .num = ST_ACCEL_FS_AVL_8G,
166 .gain = IIO_G_TO_M_S_2(4000),
169 .num = ST_ACCEL_FS_AVL_16G,
171 .gain = IIO_G_TO_M_S_2(12000),
187 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
195 .multi_read_bit = true,
200 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
201 .sensors_supported = {
202 [0] = LIS331DLH_ACCEL_DEV_NAME,
203 [1] = LSM303DL_ACCEL_DEV_NAME,
204 [2] = LSM303DLH_ACCEL_DEV_NAME,
205 [3] = LSM303DLM_ACCEL_DEV_NAME,
207 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
212 { .hz = 50, .value = 0x00, },
213 { .hz = 100, .value = 0x01, },
214 { .hz = 400, .value = 0x02, },
215 { .hz = 1000, .value = 0x03, },
221 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
222 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
225 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
226 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
233 .num = ST_ACCEL_FS_AVL_2G,
235 .gain = IIO_G_TO_M_S_2(1000),
238 .num = ST_ACCEL_FS_AVL_4G,
240 .gain = IIO_G_TO_M_S_2(2000),
243 .num = ST_ACCEL_FS_AVL_8G,
245 .gain = IIO_G_TO_M_S_2(3900),
269 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
277 .multi_read_bit = true,
282 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
283 .sensors_supported = {
284 [0] = LSM330_ACCEL_DEV_NAME,
286 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
291 { .hz = 3, .value = 0x01, },
292 { .hz = 6, .value = 0x02, },
293 { .hz = 12, .value = 0x03, },
294 { .hz = 25, .value = 0x04, },
295 { .hz = 50, .value = 0x05, },
296 { .hz = 100, .value = 0x06, },
297 { .hz = 200, .value = 0x07, },
298 { .hz = 400, .value = 0x08, },
299 { .hz = 800, .value = 0x09, },
300 { .hz = 1600, .value = 0x0a, },
306 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
309 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
310 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
317 .num = ST_ACCEL_FS_AVL_2G,
319 .gain = IIO_G_TO_M_S_2(61),
322 .num = ST_ACCEL_FS_AVL_4G,
324 .gain = IIO_G_TO_M_S_2(122),
327 .num = ST_ACCEL_FS_AVL_6G,
329 .gain = IIO_G_TO_M_S_2(183),
332 .num = ST_ACCEL_FS_AVL_8G,
334 .gain = IIO_G_TO_M_S_2(244),
337 .num = ST_ACCEL_FS_AVL_16G,
339 .gain = IIO_G_TO_M_S_2(732),
355 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
367 .multi_read_bit = false,
372 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
373 .sensors_supported = {
374 [0] = LIS3LV02DL_ACCEL_DEV_NAME,
376 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
379 .mask = 0x30, /* DF1 and DF0 */
381 { .hz = 40, .value = 0x00, },
382 { .hz = 160, .value = 0x01, },
383 { .hz = 640, .value = 0x02, },
384 { .hz = 2560, .value = 0x03, },
390 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
391 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
394 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
395 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
402 .num = ST_ACCEL_FS_AVL_2G,
404 .gain = IIO_G_TO_M_S_2(1000),
407 .num = ST_ACCEL_FS_AVL_6G,
409 .gain = IIO_G_TO_M_S_2(3000),
418 * Data Alignment Setting - needs to be set to get
419 * left-justified data like all other sensors.
431 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
439 .multi_read_bit = true,
440 .bootime = 2, /* guess */
444 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
445 .sensors_supported = {
446 [0] = LIS331DL_ACCEL_DEV_NAME,
448 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
453 { .hz = 100, .value = 0x00, },
454 { .hz = 400, .value = 0x01, },
460 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
461 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
464 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
465 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
471 * TODO: check these resulting gain settings, these are
472 * not in the datsheet
476 .num = ST_ACCEL_FS_AVL_2G,
478 .gain = IIO_G_TO_M_S_2(18000),
481 .num = ST_ACCEL_FS_AVL_8G,
483 .gain = IIO_G_TO_M_S_2(72000),
503 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
511 .multi_read_bit = false,
512 .bootime = 2, /* guess */
516 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
517 .sensors_supported = {
518 [0] = H3LIS331DL_ACCEL_DEV_NAME,
520 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
525 { .hz = 50, .value = 0x00, },
526 { .hz = 100, .value = 0x01, },
527 { .hz = 400, .value = 0x02, },
528 { .hz = 1000, .value = 0x03, },
534 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
535 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
538 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
539 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
546 .num = ST_ACCEL_FS_AVL_100G,
548 .gain = IIO_G_TO_M_S_2(49000),
551 .num = ST_ACCEL_FS_AVL_200G,
553 .gain = IIO_G_TO_M_S_2(98000),
556 .num = ST_ACCEL_FS_AVL_400G,
558 .gain = IIO_G_TO_M_S_2(195000),
582 .multi_read_bit = true,
586 /* No WAI register present */
587 .sensors_supported = {
588 [0] = LIS3L02DQ_ACCEL_DEV_NAME,
590 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
595 { .hz = 280, .value = 0x00, },
596 { .hz = 560, .value = 0x01, },
597 { .hz = 1120, .value = 0x02, },
598 { .hz = 4480, .value = 0x03, },
604 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
605 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
608 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
609 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
614 .num = ST_ACCEL_FS_AVL_2G,
615 .gain = IIO_G_TO_M_S_2(488),
620 * The part has a BDU bit but if set the data is never
621 * updated so don't set it.
631 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
639 .multi_read_bit = false,
644 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
645 .sensors_supported = {
646 [0] = LNG2DM_ACCEL_DEV_NAME,
648 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
653 { .hz = 1, .value = 0x01, },
654 { .hz = 10, .value = 0x02, },
655 { .hz = 25, .value = 0x03, },
656 { .hz = 50, .value = 0x04, },
657 { .hz = 100, .value = 0x05, },
658 { .hz = 200, .value = 0x06, },
659 { .hz = 400, .value = 0x07, },
660 { .hz = 1600, .value = 0x08, },
666 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
669 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
670 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
677 .num = ST_ACCEL_FS_AVL_2G,
679 .gain = IIO_G_TO_M_S_2(15600),
682 .num = ST_ACCEL_FS_AVL_4G,
684 .gain = IIO_G_TO_M_S_2(31200),
687 .num = ST_ACCEL_FS_AVL_8G,
689 .gain = IIO_G_TO_M_S_2(62500),
692 .num = ST_ACCEL_FS_AVL_16G,
694 .gain = IIO_G_TO_M_S_2(187500),
706 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
714 .multi_read_bit = true,
719 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
720 .sensors_supported = {
721 [0] = LIS2DW12_ACCEL_DEV_NAME,
723 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
728 { .hz = 1, .value = 0x01, },
729 { .hz = 12, .value = 0x02, },
730 { .hz = 25, .value = 0x03, },
731 { .hz = 50, .value = 0x04, },
732 { .hz = 100, .value = 0x05, },
733 { .hz = 200, .value = 0x06, },
739 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
746 .num = ST_ACCEL_FS_AVL_2G,
748 .gain = IIO_G_TO_M_S_2(976),
751 .num = ST_ACCEL_FS_AVL_4G,
753 .gain = IIO_G_TO_M_S_2(1952),
756 .num = ST_ACCEL_FS_AVL_8G,
758 .gain = IIO_G_TO_M_S_2(3904),
761 .num = ST_ACCEL_FS_AVL_16G,
763 .gain = IIO_G_TO_M_S_2(7808),
787 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
795 .multi_read_bit = false,
800 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
801 .sensors_supported = {
802 [0] = LIS3DHH_ACCEL_DEV_NAME,
804 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
806 /* just ODR = 1100Hz available */
808 { .hz = 1100, .value = 0x00, },
814 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
815 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
820 .num = ST_ACCEL_FS_AVL_2G,
821 .gain = IIO_G_TO_M_S_2(76),
843 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
847 .multi_read_bit = false,
852 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
853 .sensors_supported = {
854 [0] = LIS2DE12_ACCEL_DEV_NAME,
856 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
861 { .hz = 1, .value = 0x01, },
862 { .hz = 10, .value = 0x02, },
863 { .hz = 25, .value = 0x03, },
864 { .hz = 50, .value = 0x04, },
865 { .hz = 100, .value = 0x05, },
866 { .hz = 200, .value = 0x06, },
867 { .hz = 400, .value = 0x07, },
868 { .hz = 1620, .value = 0x08, },
869 { .hz = 5376, .value = 0x09, },
875 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
878 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
879 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
886 .num = ST_ACCEL_FS_AVL_2G,
888 .gain = IIO_G_TO_M_S_2(15600),
891 .num = ST_ACCEL_FS_AVL_4G,
893 .gain = IIO_G_TO_M_S_2(31200),
896 .num = ST_ACCEL_FS_AVL_8G,
898 .gain = IIO_G_TO_M_S_2(62500),
901 .num = ST_ACCEL_FS_AVL_16G,
903 .gain = IIO_G_TO_M_S_2(187500),
915 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
923 .multi_read_bit = true,
928 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
929 .sensors_supported = {
930 [0] = LIS2HH12_ACCEL_DEV_NAME,
932 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
937 { .hz = 10, .value = 0x01, },
938 { .hz = 50, .value = 0x02, },
939 { .hz = 100, .value = 0x03, },
940 { .hz = 200, .value = 0x04, },
941 { .hz = 400, .value = 0x05, },
942 { .hz = 800, .value = 0x06, },
948 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
951 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
952 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
959 .num = ST_ACCEL_FS_AVL_2G,
961 .gain = IIO_G_TO_M_S_2(61),
964 .num = ST_ACCEL_FS_AVL_4G,
966 .gain = IIO_G_TO_M_S_2(122),
969 .num = ST_ACCEL_FS_AVL_8G,
971 .gain = IIO_G_TO_M_S_2(244),
991 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
999 .multi_read_bit = true,
1004 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
1005 .sensors_supported = {
1006 [0] = LSM9DS0_IMU_DEV_NAME,
1008 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
1011 .mask = GENMASK(7, 4),
1027 .mask = GENMASK(7, 4),
1028 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
1031 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
1032 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
1036 .mask = GENMASK(5, 3),
1039 .num = ST_ACCEL_FS_AVL_2G,
1041 .gain = IIO_G_TO_M_S_2(61),
1044 .num = ST_ACCEL_FS_AVL_4G,
1046 .gain = IIO_G_TO_M_S_2(122),
1049 .num = ST_ACCEL_FS_AVL_6G,
1051 .gain = IIO_G_TO_M_S_2(183),
1054 .num = ST_ACCEL_FS_AVL_8G,
1056 .gain = IIO_G_TO_M_S_2(244),
1059 .num = ST_ACCEL_FS_AVL_16G,
1061 .gain = IIO_G_TO_M_S_2(732),
1079 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
1080 .mask = GENMASK(2, 0),
1087 .multi_read_bit = true,
1092 /* Default accel DRDY is available on INT1 pin */
1093 static const struct st_sensors_platform_data default_accel_pdata = {
1097 static int st_accel_read_raw(struct iio_dev *indio_dev,
1098 struct iio_chan_spec const *ch, int *val,
1099 int *val2, long mask)
1102 struct st_sensor_data *adata = iio_priv(indio_dev);
1105 case IIO_CHAN_INFO_RAW:
1106 err = st_sensors_read_info_raw(indio_dev, ch, val);
1111 case IIO_CHAN_INFO_SCALE:
1112 *val = adata->current_fullscale->gain / 1000000;
1113 *val2 = adata->current_fullscale->gain % 1000000;
1114 return IIO_VAL_INT_PLUS_MICRO;
1115 case IIO_CHAN_INFO_SAMP_FREQ:
1126 static int st_accel_write_raw(struct iio_dev *indio_dev,
1127 struct iio_chan_spec const *chan, int val, int val2, long mask)
1132 case IIO_CHAN_INFO_SCALE: {
1135 gain = val * 1000000 + val2;
1136 err = st_sensors_set_fullscale_by_gain(indio_dev, gain);
1139 case IIO_CHAN_INFO_SAMP_FREQ:
1142 mutex_lock(&indio_dev->mlock);
1143 err = st_sensors_set_odr(indio_dev, val);
1144 mutex_unlock(&indio_dev->mlock);
1153 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
1154 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
1156 static struct attribute *st_accel_attributes[] = {
1157 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
1158 &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
1162 static const struct attribute_group st_accel_attribute_group = {
1163 .attrs = st_accel_attributes,
1166 static const struct iio_info accel_info = {
1167 .attrs = &st_accel_attribute_group,
1168 .read_raw = &st_accel_read_raw,
1169 .write_raw = &st_accel_write_raw,
1170 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
1173 #ifdef CONFIG_IIO_TRIGGER
1174 static const struct iio_trigger_ops st_accel_trigger_ops = {
1175 .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
1176 .validate_device = st_sensors_validate_device,
1178 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
1180 #define ST_ACCEL_TRIGGER_OPS NULL
1184 /* Read ST-specific _ONT orientation data from ACPI and generate an
1185 * appropriate mount matrix.
1187 static int apply_acpi_orientation(struct iio_dev *indio_dev)
1189 struct st_sensor_data *adata = iio_priv(indio_dev);
1190 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
1191 struct acpi_device *adev;
1192 union acpi_object *ont;
1193 union acpi_object *elements;
1198 int final_ont[3][3] = { { 0 }, };
1200 /* For some reason, ST's _ONT translation does not apply directly
1201 * to the data read from the sensor. Another translation must be
1202 * performed first, as described by the matrix below. Perhaps
1203 * ST required this specific translation for the first product
1204 * where the device was mounted?
1206 const int default_ont[3][3] = {
1213 adev = ACPI_COMPANION(adata->dev);
1217 /* Read _ONT data, which should be a package of 6 integers. */
1218 status = acpi_evaluate_object(adev->handle, "_ONT", NULL, &buffer);
1219 if (status == AE_NOT_FOUND) {
1221 } else if (ACPI_FAILURE(status)) {
1222 dev_warn(&indio_dev->dev, "failed to execute _ONT: %d\n",
1227 ont = buffer.pointer;
1228 if (ont->type != ACPI_TYPE_PACKAGE || ont->package.count != 6)
1231 /* The first 3 integers provide axis order information.
1232 * e.g. 0 1 2 would indicate normal X,Y,Z ordering.
1233 * e.g. 1 0 2 indicates that data arrives in order Y,X,Z.
1235 elements = ont->package.elements;
1236 for (i = 0; i < 3; i++) {
1237 if (elements[i].type != ACPI_TYPE_INTEGER)
1240 val = elements[i].integer.value;
1244 /* Avoiding full matrix multiplication, we simply reorder the
1245 * columns in the default_ont matrix according to the
1246 * ordering provided by _ONT.
1248 final_ont[0][i] = default_ont[0][val];
1249 final_ont[1][i] = default_ont[1][val];
1250 final_ont[2][i] = default_ont[2][val];
1253 /* The final 3 integers provide sign flip information.
1254 * 0 means no change, 1 means flip.
1255 * e.g. 0 0 1 means that Z data should be sign-flipped.
1256 * This is applied after the axis reordering from above.
1259 for (i = 0; i < 3; i++) {
1260 if (elements[i].type != ACPI_TYPE_INTEGER)
1263 val = elements[i].integer.value;
1264 if (val != 0 && val != 1)
1269 /* Flip the values in the indicated column */
1270 final_ont[0][i] *= -1;
1271 final_ont[1][i] *= -1;
1272 final_ont[2][i] *= -1;
1275 /* Convert our integer matrix to a string-based iio_mount_matrix */
1276 for (i = 0; i < 3; i++) {
1277 for (j = 0; j < 3; j++) {
1278 int matrix_val = final_ont[i][j];
1281 switch (matrix_val) {
1294 adata->mount_matrix.rotation[i * 3 + j] = str_value;
1299 dev_info(&indio_dev->dev, "computed mount matrix from ACPI\n");
1302 kfree(buffer.pointer);
1304 dev_dbg(&indio_dev->dev,
1305 "failed to apply ACPI orientation data: %d\n", ret);
1309 #else /* !CONFIG_ACPI */
1310 static int apply_acpi_orientation(struct iio_dev *indio_dev)
1317 * st_accel_get_settings() - get sensor settings from device name
1318 * @name: device name buffer reference.
1320 * Return: valid reference on success, NULL otherwise.
1322 const struct st_sensor_settings *st_accel_get_settings(const char *name)
1324 int index = st_sensors_get_settings_index(name,
1325 st_accel_sensors_settings,
1326 ARRAY_SIZE(st_accel_sensors_settings));
1330 return &st_accel_sensors_settings[index];
1332 EXPORT_SYMBOL(st_accel_get_settings);
1334 int st_accel_common_probe(struct iio_dev *indio_dev)
1336 struct st_sensor_data *adata = iio_priv(indio_dev);
1337 struct st_sensors_platform_data *pdata = dev_get_platdata(adata->dev);
1340 indio_dev->modes = INDIO_DIRECT_MODE;
1341 indio_dev->info = &accel_info;
1343 err = st_sensors_verify_id(indio_dev);
1347 adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
1348 indio_dev->channels = adata->sensor_settings->ch;
1349 indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
1352 * First try specific ACPI methods to retrieve orientation then try the
1355 err = apply_acpi_orientation(indio_dev);
1357 err = iio_read_mount_matrix(adata->dev, &adata->mount_matrix);
1362 adata->current_fullscale = &adata->sensor_settings->fs.fs_avl[0];
1363 adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
1366 pdata = (struct st_sensors_platform_data *)&default_accel_pdata;
1368 err = st_sensors_init_sensor(indio_dev, pdata);
1372 err = st_accel_allocate_ring(indio_dev);
1376 if (adata->irq > 0) {
1377 err = st_sensors_allocate_trigger(indio_dev,
1378 ST_ACCEL_TRIGGER_OPS);
1383 err = iio_device_register(indio_dev);
1385 goto st_accel_device_register_error;
1387 dev_info(&indio_dev->dev, "registered accelerometer %s\n",
1392 st_accel_device_register_error:
1394 st_sensors_deallocate_trigger(indio_dev);
1397 EXPORT_SYMBOL(st_accel_common_probe);
1399 void st_accel_common_remove(struct iio_dev *indio_dev)
1401 struct st_sensor_data *adata = iio_priv(indio_dev);
1403 iio_device_unregister(indio_dev);
1405 st_sensors_deallocate_trigger(indio_dev);
1407 EXPORT_SYMBOL(st_accel_common_remove);
1409 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
1410 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
1411 MODULE_LICENSE("GPL v2");