2 * STMicroelectronics accelerometers driver
4 * Copyright 2012-2013 STMicroelectronics Inc.
6 * Denis Ciocca <denis.ciocca@st.com>
8 * Licensed under the GPL-2.
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/errno.h>
15 #include <linux/types.h>
16 #include <linux/mutex.h>
17 #include <linux/interrupt.h>
18 #include <linux/i2c.h>
19 #include <linux/gpio.h>
20 #include <linux/irq.h>
21 #include <linux/iio/iio.h>
22 #include <linux/iio/sysfs.h>
23 #include <linux/iio/trigger.h>
24 #include <linux/iio/buffer.h>
26 #include <linux/iio/common/st_sensors.h>
29 #define ST_ACCEL_NUMBER_DATA_CHANNELS 3
31 /* DEFAULT VALUE FOR SENSORS */
32 #define ST_ACCEL_DEFAULT_OUT_X_L_ADDR 0x28
33 #define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR 0x2a
34 #define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR 0x2c
37 #define ST_ACCEL_FS_AVL_2G 2
38 #define ST_ACCEL_FS_AVL_4G 4
39 #define ST_ACCEL_FS_AVL_6G 6
40 #define ST_ACCEL_FS_AVL_8G 8
41 #define ST_ACCEL_FS_AVL_16G 16
42 #define ST_ACCEL_FS_AVL_100G 100
43 #define ST_ACCEL_FS_AVL_200G 200
44 #define ST_ACCEL_FS_AVL_400G 400
46 static const struct iio_chan_spec st_accel_8bit_channels[] = {
47 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
48 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
49 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 8, 8,
50 ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1),
51 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
52 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
53 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 8, 8,
54 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1),
55 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
56 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
57 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 8, 8,
58 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1),
59 IIO_CHAN_SOFT_TIMESTAMP(3)
62 static const struct iio_chan_spec st_accel_12bit_channels[] = {
63 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
64 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
65 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
66 ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
67 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
68 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
69 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
70 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
71 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
72 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
73 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
74 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
75 IIO_CHAN_SOFT_TIMESTAMP(3)
78 static const struct iio_chan_spec st_accel_16bit_channels[] = {
79 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
80 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
81 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
82 ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
83 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
84 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
85 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
86 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
87 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
88 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
89 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
90 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
91 IIO_CHAN_SOFT_TIMESTAMP(3)
94 static const struct st_sensor_settings st_accel_sensors_settings[] = {
97 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
98 .sensors_supported = {
99 [0] = LIS3DH_ACCEL_DEV_NAME,
100 [1] = LSM303DLHC_ACCEL_DEV_NAME,
101 [2] = LSM330D_ACCEL_DEV_NAME,
102 [3] = LSM330DL_ACCEL_DEV_NAME,
103 [4] = LSM330DLC_ACCEL_DEV_NAME,
104 [5] = LSM303AGR_ACCEL_DEV_NAME,
105 [6] = LIS2DH12_ACCEL_DEV_NAME,
107 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
112 { .hz = 1, .value = 0x01, },
113 { .hz = 10, .value = 0x02, },
114 { .hz = 25, .value = 0x03, },
115 { .hz = 50, .value = 0x04, },
116 { .hz = 100, .value = 0x05, },
117 { .hz = 200, .value = 0x06, },
118 { .hz = 400, .value = 0x07, },
119 { .hz = 1600, .value = 0x08, },
125 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
128 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
129 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
136 .num = ST_ACCEL_FS_AVL_2G,
138 .gain = IIO_G_TO_M_S_2(1000),
141 .num = ST_ACCEL_FS_AVL_4G,
143 .gain = IIO_G_TO_M_S_2(2000),
146 .num = ST_ACCEL_FS_AVL_8G,
148 .gain = IIO_G_TO_M_S_2(4000),
151 .num = ST_ACCEL_FS_AVL_16G,
153 .gain = IIO_G_TO_M_S_2(12000),
169 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
177 .multi_read_bit = true,
182 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
183 .sensors_supported = {
184 [0] = LIS331DLH_ACCEL_DEV_NAME,
185 [1] = LSM303DL_ACCEL_DEV_NAME,
186 [2] = LSM303DLH_ACCEL_DEV_NAME,
187 [3] = LSM303DLM_ACCEL_DEV_NAME,
189 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
194 { .hz = 50, .value = 0x00, },
195 { .hz = 100, .value = 0x01, },
196 { .hz = 400, .value = 0x02, },
197 { .hz = 1000, .value = 0x03, },
203 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
204 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
207 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
208 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
215 .num = ST_ACCEL_FS_AVL_2G,
217 .gain = IIO_G_TO_M_S_2(1000),
220 .num = ST_ACCEL_FS_AVL_4G,
222 .gain = IIO_G_TO_M_S_2(2000),
225 .num = ST_ACCEL_FS_AVL_8G,
227 .gain = IIO_G_TO_M_S_2(3900),
251 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
259 .multi_read_bit = true,
264 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
265 .sensors_supported = {
266 [0] = LSM330_ACCEL_DEV_NAME,
268 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
273 { .hz = 3, .value = 0x01, },
274 { .hz = 6, .value = 0x02, },
275 { .hz = 12, .value = 0x03, },
276 { .hz = 25, .value = 0x04, },
277 { .hz = 50, .value = 0x05, },
278 { .hz = 100, .value = 0x06, },
279 { .hz = 200, .value = 0x07, },
280 { .hz = 400, .value = 0x08, },
281 { .hz = 800, .value = 0x09, },
282 { .hz = 1600, .value = 0x0a, },
288 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
291 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
292 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
299 .num = ST_ACCEL_FS_AVL_2G,
301 .gain = IIO_G_TO_M_S_2(61),
304 .num = ST_ACCEL_FS_AVL_4G,
306 .gain = IIO_G_TO_M_S_2(122),
309 .num = ST_ACCEL_FS_AVL_6G,
311 .gain = IIO_G_TO_M_S_2(183),
314 .num = ST_ACCEL_FS_AVL_8G,
316 .gain = IIO_G_TO_M_S_2(244),
319 .num = ST_ACCEL_FS_AVL_16G,
321 .gain = IIO_G_TO_M_S_2(732),
337 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
349 .multi_read_bit = false,
354 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
355 .sensors_supported = {
356 [0] = LIS3LV02DL_ACCEL_DEV_NAME,
358 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
361 .mask = 0x30, /* DF1 and DF0 */
363 { .hz = 40, .value = 0x00, },
364 { .hz = 160, .value = 0x01, },
365 { .hz = 640, .value = 0x02, },
366 { .hz = 2560, .value = 0x03, },
372 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
373 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
376 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
377 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
384 .num = ST_ACCEL_FS_AVL_2G,
386 .gain = IIO_G_TO_M_S_2(1000),
389 .num = ST_ACCEL_FS_AVL_6G,
391 .gain = IIO_G_TO_M_S_2(3000),
400 * Data Alignment Setting - needs to be set to get
401 * left-justified data like all other sensors.
413 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
421 .multi_read_bit = true,
422 .bootime = 2, /* guess */
426 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
427 .sensors_supported = {
428 [0] = LIS331DL_ACCEL_DEV_NAME,
430 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
435 { .hz = 100, .value = 0x00, },
436 { .hz = 400, .value = 0x01, },
442 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
443 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
446 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
447 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
453 * TODO: check these resulting gain settings, these are
454 * not in the datsheet
458 .num = ST_ACCEL_FS_AVL_2G,
460 .gain = IIO_G_TO_M_S_2(18000),
463 .num = ST_ACCEL_FS_AVL_8G,
465 .gain = IIO_G_TO_M_S_2(72000),
485 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
493 .multi_read_bit = false,
494 .bootime = 2, /* guess */
498 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
499 .sensors_supported = {
500 [0] = H3LIS331DL_ACCEL_DEV_NAME,
502 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
507 { .hz = 50, .value = 0x00, },
508 { .hz = 100, .value = 0x01, },
509 { .hz = 400, .value = 0x02, },
510 { .hz = 1000, .value = 0x03, },
516 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
517 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
520 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
521 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
528 .num = ST_ACCEL_FS_AVL_100G,
530 .gain = IIO_G_TO_M_S_2(49000),
533 .num = ST_ACCEL_FS_AVL_200G,
535 .gain = IIO_G_TO_M_S_2(98000),
538 .num = ST_ACCEL_FS_AVL_400G,
540 .gain = IIO_G_TO_M_S_2(195000),
564 .multi_read_bit = true,
568 /* No WAI register present */
569 .sensors_supported = {
570 [0] = LIS3L02DQ_ACCEL_DEV_NAME,
572 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
577 { .hz = 280, .value = 0x00, },
578 { .hz = 560, .value = 0x01, },
579 { .hz = 1120, .value = 0x02, },
580 { .hz = 4480, .value = 0x03, },
586 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
587 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
590 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
591 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
596 .num = ST_ACCEL_FS_AVL_2G,
597 .gain = IIO_G_TO_M_S_2(488),
602 * The part has a BDU bit but if set the data is never
603 * updated so don't set it.
613 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
621 .multi_read_bit = false,
626 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
627 .sensors_supported = {
628 [0] = LNG2DM_ACCEL_DEV_NAME,
630 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
635 { .hz = 1, .value = 0x01, },
636 { .hz = 10, .value = 0x02, },
637 { .hz = 25, .value = 0x03, },
638 { .hz = 50, .value = 0x04, },
639 { .hz = 100, .value = 0x05, },
640 { .hz = 200, .value = 0x06, },
641 { .hz = 400, .value = 0x07, },
642 { .hz = 1600, .value = 0x08, },
648 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
651 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
652 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
659 .num = ST_ACCEL_FS_AVL_2G,
661 .gain = IIO_G_TO_M_S_2(15600),
664 .num = ST_ACCEL_FS_AVL_4G,
666 .gain = IIO_G_TO_M_S_2(31200),
669 .num = ST_ACCEL_FS_AVL_8G,
671 .gain = IIO_G_TO_M_S_2(62500),
674 .num = ST_ACCEL_FS_AVL_16G,
676 .gain = IIO_G_TO_M_S_2(187500),
688 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
696 .multi_read_bit = true,
701 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
702 .sensors_supported = {
703 [0] = LIS2DW12_ACCEL_DEV_NAME,
705 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
710 { .hz = 1, .value = 0x01, },
711 { .hz = 12, .value = 0x02, },
712 { .hz = 25, .value = 0x03, },
713 { .hz = 50, .value = 0x04, },
714 { .hz = 100, .value = 0x05, },
715 { .hz = 200, .value = 0x06, },
721 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
728 .num = ST_ACCEL_FS_AVL_2G,
730 .gain = IIO_G_TO_M_S_2(976),
733 .num = ST_ACCEL_FS_AVL_4G,
735 .gain = IIO_G_TO_M_S_2(1952),
738 .num = ST_ACCEL_FS_AVL_8G,
740 .gain = IIO_G_TO_M_S_2(3904),
743 .num = ST_ACCEL_FS_AVL_16G,
745 .gain = IIO_G_TO_M_S_2(7808),
769 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
777 .multi_read_bit = false,
782 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
783 .sensors_supported = {
784 [0] = LIS3DHH_ACCEL_DEV_NAME,
786 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
788 /* just ODR = 1100Hz available */
790 { .hz = 1100, .value = 0x00, },
796 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
797 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
802 .num = ST_ACCEL_FS_AVL_2G,
803 .gain = IIO_G_TO_M_S_2(76),
825 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
829 .multi_read_bit = false,
834 static int st_accel_read_raw(struct iio_dev *indio_dev,
835 struct iio_chan_spec const *ch, int *val,
836 int *val2, long mask)
839 struct st_sensor_data *adata = iio_priv(indio_dev);
842 case IIO_CHAN_INFO_RAW:
843 err = st_sensors_read_info_raw(indio_dev, ch, val);
848 case IIO_CHAN_INFO_SCALE:
849 *val = adata->current_fullscale->gain / 1000000;
850 *val2 = adata->current_fullscale->gain % 1000000;
851 return IIO_VAL_INT_PLUS_MICRO;
852 case IIO_CHAN_INFO_SAMP_FREQ:
863 static int st_accel_write_raw(struct iio_dev *indio_dev,
864 struct iio_chan_spec const *chan, int val, int val2, long mask)
869 case IIO_CHAN_INFO_SCALE: {
872 gain = val * 1000000 + val2;
873 err = st_sensors_set_fullscale_by_gain(indio_dev, gain);
876 case IIO_CHAN_INFO_SAMP_FREQ:
879 mutex_lock(&indio_dev->mlock);
880 err = st_sensors_set_odr(indio_dev, val);
881 mutex_unlock(&indio_dev->mlock);
890 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
891 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
893 static struct attribute *st_accel_attributes[] = {
894 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
895 &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
899 static const struct attribute_group st_accel_attribute_group = {
900 .attrs = st_accel_attributes,
903 static const struct iio_info accel_info = {
904 .attrs = &st_accel_attribute_group,
905 .read_raw = &st_accel_read_raw,
906 .write_raw = &st_accel_write_raw,
907 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
910 #ifdef CONFIG_IIO_TRIGGER
911 static const struct iio_trigger_ops st_accel_trigger_ops = {
912 .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
913 .validate_device = st_sensors_validate_device,
915 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
917 #define ST_ACCEL_TRIGGER_OPS NULL
920 int st_accel_common_probe(struct iio_dev *indio_dev)
922 struct st_sensor_data *adata = iio_priv(indio_dev);
923 struct st_sensors_platform_data *pdata =
924 (struct st_sensors_platform_data *)adata->dev->platform_data;
925 int irq = adata->get_irq_data_ready(indio_dev);
928 indio_dev->modes = INDIO_DIRECT_MODE;
929 indio_dev->info = &accel_info;
930 mutex_init(&adata->tb.buf_lock);
932 err = st_sensors_power_enable(indio_dev);
936 err = st_sensors_check_device_support(indio_dev,
937 ARRAY_SIZE(st_accel_sensors_settings),
938 st_accel_sensors_settings);
940 goto st_accel_power_off;
942 adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
943 adata->multiread_bit = adata->sensor_settings->multi_read_bit;
944 indio_dev->channels = adata->sensor_settings->ch;
945 indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
947 adata->current_fullscale = (struct st_sensor_fullscale_avl *)
948 &adata->sensor_settings->fs.fs_avl[0];
949 adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
952 pdata = (struct st_sensors_platform_data *)&default_accel_pdata;
954 err = st_sensors_init_sensor(indio_dev, pdata);
956 goto st_accel_power_off;
958 err = st_accel_allocate_ring(indio_dev);
960 goto st_accel_power_off;
963 err = st_sensors_allocate_trigger(indio_dev,
964 ST_ACCEL_TRIGGER_OPS);
966 goto st_accel_probe_trigger_error;
969 err = iio_device_register(indio_dev);
971 goto st_accel_device_register_error;
973 dev_info(&indio_dev->dev, "registered accelerometer %s\n",
978 st_accel_device_register_error:
980 st_sensors_deallocate_trigger(indio_dev);
981 st_accel_probe_trigger_error:
982 st_accel_deallocate_ring(indio_dev);
984 st_sensors_power_disable(indio_dev);
988 EXPORT_SYMBOL(st_accel_common_probe);
990 void st_accel_common_remove(struct iio_dev *indio_dev)
992 struct st_sensor_data *adata = iio_priv(indio_dev);
994 st_sensors_power_disable(indio_dev);
996 iio_device_unregister(indio_dev);
997 if (adata->get_irq_data_ready(indio_dev) > 0)
998 st_sensors_deallocate_trigger(indio_dev);
1000 st_accel_deallocate_ring(indio_dev);
1002 EXPORT_SYMBOL(st_accel_common_remove);
1004 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
1005 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
1006 MODULE_LICENSE("GPL v2");