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),
167 .addr_stat_drdy
= ST_SENSORS_DEFAULT_STAT_ADDR
,
173 .multi_read_bit
= true,
178 .wai_addr
= ST_SENSORS_DEFAULT_WAI_ADDRESS
,
179 .sensors_supported
= {
180 [0] = LIS331DLH_ACCEL_DEV_NAME
,
181 [1] = LSM303DL_ACCEL_DEV_NAME
,
182 [2] = LSM303DLH_ACCEL_DEV_NAME
,
183 [3] = LSM303DLM_ACCEL_DEV_NAME
,
185 .ch
= (struct iio_chan_spec
*)st_accel_12bit_channels
,
190 { .hz
= 50, .value
= 0x00, },
191 { .hz
= 100, .value
= 0x01, },
192 { .hz
= 400, .value
= 0x02, },
193 { .hz
= 1000, .value
= 0x03, },
199 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
200 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
203 .addr
= ST_SENSORS_DEFAULT_AXIS_ADDR
,
204 .mask
= ST_SENSORS_DEFAULT_AXIS_MASK
,
211 .num
= ST_ACCEL_FS_AVL_2G
,
213 .gain
= IIO_G_TO_M_S_2(1000),
216 .num
= ST_ACCEL_FS_AVL_4G
,
218 .gain
= IIO_G_TO_M_S_2(2000),
221 .num
= ST_ACCEL_FS_AVL_8G
,
223 .gain
= IIO_G_TO_M_S_2(3900),
239 .addr_stat_drdy
= ST_SENSORS_DEFAULT_STAT_ADDR
,
245 .multi_read_bit
= true,
250 .wai_addr
= ST_SENSORS_DEFAULT_WAI_ADDRESS
,
251 .sensors_supported
= {
252 [0] = LSM330_ACCEL_DEV_NAME
,
254 .ch
= (struct iio_chan_spec
*)st_accel_16bit_channels
,
259 { .hz
= 3, .value
= 0x01, },
260 { .hz
= 6, .value
= 0x02, },
261 { .hz
= 12, .value
= 0x03, },
262 { .hz
= 25, .value
= 0x04, },
263 { .hz
= 50, .value
= 0x05, },
264 { .hz
= 100, .value
= 0x06, },
265 { .hz
= 200, .value
= 0x07, },
266 { .hz
= 400, .value
= 0x08, },
267 { .hz
= 800, .value
= 0x09, },
268 { .hz
= 1600, .value
= 0x0a, },
274 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
277 .addr
= ST_SENSORS_DEFAULT_AXIS_ADDR
,
278 .mask
= ST_SENSORS_DEFAULT_AXIS_MASK
,
285 .num
= ST_ACCEL_FS_AVL_2G
,
287 .gain
= IIO_G_TO_M_S_2(61),
290 .num
= ST_ACCEL_FS_AVL_4G
,
292 .gain
= IIO_G_TO_M_S_2(122),
295 .num
= ST_ACCEL_FS_AVL_6G
,
297 .gain
= IIO_G_TO_M_S_2(183),
300 .num
= ST_ACCEL_FS_AVL_8G
,
302 .gain
= IIO_G_TO_M_S_2(244),
305 .num
= ST_ACCEL_FS_AVL_16G
,
307 .gain
= IIO_G_TO_M_S_2(732),
321 .addr_stat_drdy
= ST_SENSORS_DEFAULT_STAT_ADDR
,
331 .multi_read_bit
= false,
336 .wai_addr
= ST_SENSORS_DEFAULT_WAI_ADDRESS
,
337 .sensors_supported
= {
338 [0] = LIS3LV02DL_ACCEL_DEV_NAME
,
340 .ch
= (struct iio_chan_spec
*)st_accel_12bit_channels
,
343 .mask
= 0x30, /* DF1 and DF0 */
345 { .hz
= 40, .value
= 0x00, },
346 { .hz
= 160, .value
= 0x01, },
347 { .hz
= 640, .value
= 0x02, },
348 { .hz
= 2560, .value
= 0x03, },
354 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
355 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
358 .addr
= ST_SENSORS_DEFAULT_AXIS_ADDR
,
359 .mask
= ST_SENSORS_DEFAULT_AXIS_MASK
,
366 .num
= ST_ACCEL_FS_AVL_2G
,
368 .gain
= IIO_G_TO_M_S_2(1000),
371 .num
= ST_ACCEL_FS_AVL_6G
,
373 .gain
= IIO_G_TO_M_S_2(3000),
382 * Data Alignment Setting - needs to be set to get
383 * left-justified data like all other sensors.
392 .addr_stat_drdy
= ST_SENSORS_DEFAULT_STAT_ADDR
,
398 .multi_read_bit
= true,
399 .bootime
= 2, /* guess */
403 .wai_addr
= ST_SENSORS_DEFAULT_WAI_ADDRESS
,
404 .sensors_supported
= {
405 [0] = LIS331DL_ACCEL_DEV_NAME
,
407 .ch
= (struct iio_chan_spec
*)st_accel_8bit_channels
,
412 { .hz
= 100, .value
= 0x00, },
413 { .hz
= 400, .value
= 0x01, },
419 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
420 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
423 .addr
= ST_SENSORS_DEFAULT_AXIS_ADDR
,
424 .mask
= ST_SENSORS_DEFAULT_AXIS_MASK
,
430 * TODO: check these resulting gain settings, these are
431 * not in the datsheet
435 .num
= ST_ACCEL_FS_AVL_2G
,
437 .gain
= IIO_G_TO_M_S_2(18000),
440 .num
= ST_ACCEL_FS_AVL_8G
,
442 .gain
= IIO_G_TO_M_S_2(72000),
454 .addr_stat_drdy
= ST_SENSORS_DEFAULT_STAT_ADDR
,
460 .multi_read_bit
= false,
461 .bootime
= 2, /* guess */
465 .wai_addr
= ST_SENSORS_DEFAULT_WAI_ADDRESS
,
466 .sensors_supported
= {
467 [0] = H3LIS331DL_DRIVER_NAME
,
469 .ch
= (struct iio_chan_spec
*)st_accel_12bit_channels
,
474 { .hz
= 50, .value
= 0x00, },
475 { .hz
= 100, .value
= 0x01, },
476 { .hz
= 400, .value
= 0x02, },
477 { .hz
= 1000, .value
= 0x03, },
483 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
484 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
487 .addr
= ST_SENSORS_DEFAULT_AXIS_ADDR
,
488 .mask
= ST_SENSORS_DEFAULT_AXIS_MASK
,
495 .num
= ST_ACCEL_FS_AVL_100G
,
497 .gain
= IIO_G_TO_M_S_2(49000),
500 .num
= ST_ACCEL_FS_AVL_200G
,
502 .gain
= IIO_G_TO_M_S_2(98000),
505 .num
= ST_ACCEL_FS_AVL_400G
,
507 .gain
= IIO_G_TO_M_S_2(195000),
526 .multi_read_bit
= true,
530 /* No WAI register present */
531 .sensors_supported
= {
532 [0] = LIS3L02DQ_ACCEL_DEV_NAME
,
534 .ch
= (struct iio_chan_spec
*)st_accel_12bit_channels
,
539 { .hz
= 280, .value
= 0x00, },
540 { .hz
= 560, .value
= 0x01, },
541 { .hz
= 1120, .value
= 0x02, },
542 { .hz
= 4480, .value
= 0x03, },
548 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
549 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
552 .addr
= ST_SENSORS_DEFAULT_AXIS_ADDR
,
553 .mask
= ST_SENSORS_DEFAULT_AXIS_MASK
,
558 .num
= ST_ACCEL_FS_AVL_2G
,
559 .gain
= IIO_G_TO_M_S_2(488),
564 * The part has a BDU bit but if set the data is never
565 * updated so don't set it.
572 .addr_stat_drdy
= ST_SENSORS_DEFAULT_STAT_ADDR
,
578 .multi_read_bit
= false,
583 .wai_addr
= ST_SENSORS_DEFAULT_WAI_ADDRESS
,
584 .sensors_supported
= {
585 [0] = LNG2DM_ACCEL_DEV_NAME
,
587 .ch
= (struct iio_chan_spec
*)st_accel_8bit_channels
,
592 { .hz
= 1, .value
= 0x01, },
593 { .hz
= 10, .value
= 0x02, },
594 { .hz
= 25, .value
= 0x03, },
595 { .hz
= 50, .value
= 0x04, },
596 { .hz
= 100, .value
= 0x05, },
597 { .hz
= 200, .value
= 0x06, },
598 { .hz
= 400, .value
= 0x07, },
599 { .hz
= 1600, .value
= 0x08, },
605 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
608 .addr
= ST_SENSORS_DEFAULT_AXIS_ADDR
,
609 .mask
= ST_SENSORS_DEFAULT_AXIS_MASK
,
616 .num
= ST_ACCEL_FS_AVL_2G
,
618 .gain
= IIO_G_TO_M_S_2(15600),
621 .num
= ST_ACCEL_FS_AVL_4G
,
623 .gain
= IIO_G_TO_M_S_2(31200),
626 .num
= ST_ACCEL_FS_AVL_8G
,
628 .gain
= IIO_G_TO_M_S_2(62500),
631 .num
= ST_ACCEL_FS_AVL_16G
,
633 .gain
= IIO_G_TO_M_S_2(187500),
643 .addr_stat_drdy
= ST_SENSORS_DEFAULT_STAT_ADDR
,
649 .multi_read_bit
= true,
654 static int st_accel_read_raw(struct iio_dev
*indio_dev
,
655 struct iio_chan_spec
const *ch
, int *val
,
656 int *val2
, long mask
)
659 struct st_sensor_data
*adata
= iio_priv(indio_dev
);
662 case IIO_CHAN_INFO_RAW
:
663 err
= st_sensors_read_info_raw(indio_dev
, ch
, val
);
668 case IIO_CHAN_INFO_SCALE
:
669 *val
= adata
->current_fullscale
->gain
/ 1000000;
670 *val2
= adata
->current_fullscale
->gain
% 1000000;
671 return IIO_VAL_INT_PLUS_MICRO
;
672 case IIO_CHAN_INFO_SAMP_FREQ
:
683 static int st_accel_write_raw(struct iio_dev
*indio_dev
,
684 struct iio_chan_spec
const *chan
, int val
, int val2
, long mask
)
689 case IIO_CHAN_INFO_SCALE
: {
692 gain
= val
* 1000000 + val2
;
693 err
= st_sensors_set_fullscale_by_gain(indio_dev
, gain
);
696 case IIO_CHAN_INFO_SAMP_FREQ
:
699 mutex_lock(&indio_dev
->mlock
);
700 err
= st_sensors_set_odr(indio_dev
, val
);
701 mutex_unlock(&indio_dev
->mlock
);
710 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
711 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available
);
713 static struct attribute
*st_accel_attributes
[] = {
714 &iio_dev_attr_sampling_frequency_available
.dev_attr
.attr
,
715 &iio_dev_attr_in_accel_scale_available
.dev_attr
.attr
,
719 static const struct attribute_group st_accel_attribute_group
= {
720 .attrs
= st_accel_attributes
,
723 static const struct iio_info accel_info
= {
724 .driver_module
= THIS_MODULE
,
725 .attrs
= &st_accel_attribute_group
,
726 .read_raw
= &st_accel_read_raw
,
727 .write_raw
= &st_accel_write_raw
,
728 .debugfs_reg_access
= &st_sensors_debugfs_reg_access
,
731 #ifdef CONFIG_IIO_TRIGGER
732 static const struct iio_trigger_ops st_accel_trigger_ops
= {
733 .owner
= THIS_MODULE
,
734 .set_trigger_state
= ST_ACCEL_TRIGGER_SET_STATE
,
735 .validate_device
= st_sensors_validate_device
,
737 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
739 #define ST_ACCEL_TRIGGER_OPS NULL
742 int st_accel_common_probe(struct iio_dev
*indio_dev
)
744 struct st_sensor_data
*adata
= iio_priv(indio_dev
);
745 struct st_sensors_platform_data
*pdata
=
746 (struct st_sensors_platform_data
*)adata
->dev
->platform_data
;
747 int irq
= adata
->get_irq_data_ready(indio_dev
);
750 indio_dev
->modes
= INDIO_DIRECT_MODE
;
751 indio_dev
->info
= &accel_info
;
752 mutex_init(&adata
->tb
.buf_lock
);
754 err
= st_sensors_power_enable(indio_dev
);
758 err
= st_sensors_check_device_support(indio_dev
,
759 ARRAY_SIZE(st_accel_sensors_settings
),
760 st_accel_sensors_settings
);
762 goto st_accel_power_off
;
764 adata
->num_data_channels
= ST_ACCEL_NUMBER_DATA_CHANNELS
;
765 adata
->multiread_bit
= adata
->sensor_settings
->multi_read_bit
;
766 indio_dev
->channels
= adata
->sensor_settings
->ch
;
767 indio_dev
->num_channels
= ST_SENSORS_NUMBER_ALL_CHANNELS
;
769 adata
->current_fullscale
= (struct st_sensor_fullscale_avl
*)
770 &adata
->sensor_settings
->fs
.fs_avl
[0];
771 adata
->odr
= adata
->sensor_settings
->odr
.odr_avl
[0].hz
;
774 pdata
= (struct st_sensors_platform_data
*)&default_accel_pdata
;
776 err
= st_sensors_init_sensor(indio_dev
, adata
->dev
->platform_data
);
778 goto st_accel_power_off
;
780 err
= st_accel_allocate_ring(indio_dev
);
782 goto st_accel_power_off
;
785 err
= st_sensors_allocate_trigger(indio_dev
,
786 ST_ACCEL_TRIGGER_OPS
);
788 goto st_accel_probe_trigger_error
;
791 err
= iio_device_register(indio_dev
);
793 goto st_accel_device_register_error
;
795 dev_info(&indio_dev
->dev
, "registered accelerometer %s\n",
800 st_accel_device_register_error
:
802 st_sensors_deallocate_trigger(indio_dev
);
803 st_accel_probe_trigger_error
:
804 st_accel_deallocate_ring(indio_dev
);
806 st_sensors_power_disable(indio_dev
);
810 EXPORT_SYMBOL(st_accel_common_probe
);
812 void st_accel_common_remove(struct iio_dev
*indio_dev
)
814 struct st_sensor_data
*adata
= iio_priv(indio_dev
);
816 st_sensors_power_disable(indio_dev
);
818 iio_device_unregister(indio_dev
);
819 if (adata
->get_irq_data_ready(indio_dev
) > 0)
820 st_sensors_deallocate_trigger(indio_dev
);
822 st_accel_deallocate_ring(indio_dev
);
824 EXPORT_SYMBOL(st_accel_common_remove
);
826 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
827 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
828 MODULE_LICENSE("GPL v2");