2 * lis3l02dq.c support STMicroelectronics LISD02DQ
3 * 3d 2g Linear Accelerometers via SPI
5 * Copyright (c) 2007 Jonathan Cameron <jic23@cam.ac.uk>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 * 16 bit left justified mode used.
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/gpio.h>
18 #include <linux/mutex.h>
19 #include <linux/device.h>
20 #include <linux/kernel.h>
21 #include <linux/spi/spi.h>
22 #include <linux/slab.h>
23 #include <linux/sysfs.h>
24 #include <linux/module.h>
28 #include "../buffer_generic.h"
30 #include "lis3l02dq.h"
32 /* At the moment the spi framework doesn't allow global setting of cs_change.
33 * It's in the likely to be added comment at the top of spi.h.
34 * This means that use cannot be made of spi_write etc.
36 /* direct copy of the irq_default_primary_handler */
37 #ifndef CONFIG_IIO_BUFFER
38 static irqreturn_t
lis3l02dq_nobuffer(int irq
, void *private)
40 return IRQ_WAKE_THREAD
;
45 * lis3l02dq_spi_read_reg_8() - read single byte from a single register
46 * @indio_dev: iio_dev for this actual device
47 * @reg_address: the address of the register to be read
48 * @val: pass back the resulting value
50 int lis3l02dq_spi_read_reg_8(struct iio_dev
*indio_dev
,
51 u8 reg_address
, u8
*val
)
53 struct lis3l02dq_state
*st
= iio_priv(indio_dev
);
54 struct spi_message msg
;
56 struct spi_transfer xfer
= {
63 mutex_lock(&st
->buf_lock
);
64 st
->tx
[0] = LIS3L02DQ_READ_REG(reg_address
);
67 spi_message_init(&msg
);
68 spi_message_add_tail(&xfer
, &msg
);
69 ret
= spi_sync(st
->us
, &msg
);
71 mutex_unlock(&st
->buf_lock
);
77 * lis3l02dq_spi_write_reg_8() - write single byte to a register
78 * @indio_dev: iio_dev for this device
79 * @reg_address: the address of the register to be written
80 * @val: the value to write
82 int lis3l02dq_spi_write_reg_8(struct iio_dev
*indio_dev
,
87 struct lis3l02dq_state
*st
= iio_priv(indio_dev
);
89 mutex_lock(&st
->buf_lock
);
90 st
->tx
[0] = LIS3L02DQ_WRITE_REG(reg_address
);
92 ret
= spi_write(st
->us
, st
->tx
, 2);
93 mutex_unlock(&st
->buf_lock
);
99 * lisl302dq_spi_write_reg_s16() - write 2 bytes to a pair of registers
100 * @indio_dev: iio_dev for this device
101 * @lower_reg_address: the address of the lower of the two registers.
102 * Second register is assumed to have address one greater.
103 * @value: value to be written
105 static int lis3l02dq_spi_write_reg_s16(struct iio_dev
*indio_dev
,
106 u8 lower_reg_address
,
110 struct spi_message msg
;
111 struct lis3l02dq_state
*st
= iio_priv(indio_dev
);
112 struct spi_transfer xfers
[] = { {
118 .tx_buf
= st
->tx
+ 2,
124 mutex_lock(&st
->buf_lock
);
125 st
->tx
[0] = LIS3L02DQ_WRITE_REG(lower_reg_address
);
126 st
->tx
[1] = value
& 0xFF;
127 st
->tx
[2] = LIS3L02DQ_WRITE_REG(lower_reg_address
+ 1);
128 st
->tx
[3] = (value
>> 8) & 0xFF;
130 spi_message_init(&msg
);
131 spi_message_add_tail(&xfers
[0], &msg
);
132 spi_message_add_tail(&xfers
[1], &msg
);
133 ret
= spi_sync(st
->us
, &msg
);
134 mutex_unlock(&st
->buf_lock
);
139 static int lis3l02dq_read_reg_s16(struct iio_dev
*indio_dev
,
140 u8 lower_reg_address
,
143 struct lis3l02dq_state
*st
= iio_priv(indio_dev
);
145 struct spi_message msg
;
148 struct spi_transfer xfers
[] = { {
155 .tx_buf
= st
->tx
+ 2,
156 .rx_buf
= st
->rx
+ 2,
162 mutex_lock(&st
->buf_lock
);
163 st
->tx
[0] = LIS3L02DQ_READ_REG(lower_reg_address
);
165 st
->tx
[2] = LIS3L02DQ_READ_REG(lower_reg_address
+ 1);
168 spi_message_init(&msg
);
169 spi_message_add_tail(&xfers
[0], &msg
);
170 spi_message_add_tail(&xfers
[1], &msg
);
171 ret
= spi_sync(st
->us
, &msg
);
173 dev_err(&st
->us
->dev
, "problem when reading 16 bit register");
176 tempval
= (s16
)(st
->rx
[1]) | ((s16
)(st
->rx
[3]) << 8);
180 mutex_unlock(&st
->buf_lock
);
184 enum lis3l02dq_rm_ind
{
190 static u8 lis3l02dq_axis_map
[3][3] = {
191 [LIS3L02DQ_ACCEL
] = { LIS3L02DQ_REG_OUT_X_L_ADDR
,
192 LIS3L02DQ_REG_OUT_Y_L_ADDR
,
193 LIS3L02DQ_REG_OUT_Z_L_ADDR
},
194 [LIS3L02DQ_GAIN
] = { LIS3L02DQ_REG_GAIN_X_ADDR
,
195 LIS3L02DQ_REG_GAIN_Y_ADDR
,
196 LIS3L02DQ_REG_GAIN_Z_ADDR
},
197 [LIS3L02DQ_BIAS
] = { LIS3L02DQ_REG_OFFSET_X_ADDR
,
198 LIS3L02DQ_REG_OFFSET_Y_ADDR
,
199 LIS3L02DQ_REG_OFFSET_Z_ADDR
}
202 static int lis3l02dq_read_thresh(struct iio_dev
*indio_dev
,
206 return lis3l02dq_read_reg_s16(indio_dev
, LIS3L02DQ_REG_THS_L_ADDR
, val
);
209 static int lis3l02dq_write_thresh(struct iio_dev
*indio_dev
,
214 return lis3l02dq_spi_write_reg_s16(indio_dev
,
215 LIS3L02DQ_REG_THS_L_ADDR
,
219 static int lis3l02dq_write_raw(struct iio_dev
*indio_dev
,
220 struct iio_chan_spec
const *chan
,
225 int ret
= -EINVAL
, reg
;
229 case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE
):
230 if (val
> 255 || val
< -256)
233 reg
= lis3l02dq_axis_map
[LIS3L02DQ_BIAS
][chan
->address
];
234 ret
= lis3l02dq_spi_write_reg_8(indio_dev
, reg
, sval
);
236 case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE
):
240 reg
= lis3l02dq_axis_map
[LIS3L02DQ_GAIN
][chan
->address
];
241 ret
= lis3l02dq_spi_write_reg_8(indio_dev
, reg
, uval
);
247 static int lis3l02dq_read_raw(struct iio_dev
*indio_dev
,
248 struct iio_chan_spec
const *chan
,
260 /* Take the iio_dev status lock */
261 mutex_lock(&indio_dev
->mlock
);
262 if (indio_dev
->currentmode
== INDIO_BUFFER_TRIGGERED
)
263 ret
= lis3l02dq_read_accel_from_buffer(indio_dev
->
268 reg
= lis3l02dq_axis_map
269 [LIS3L02DQ_ACCEL
][chan
->address
];
270 ret
= lis3l02dq_read_reg_s16(indio_dev
, reg
, val
);
272 mutex_unlock(&indio_dev
->mlock
);
274 case (1 << IIO_CHAN_INFO_SCALE_SHARED
):
277 return IIO_VAL_INT_PLUS_MICRO
;
278 case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE
):
279 reg
= lis3l02dq_axis_map
[LIS3L02DQ_GAIN
][chan
->address
];
280 ret
= lis3l02dq_spi_read_reg_8(indio_dev
, reg
, &utemp
);
283 /* to match with what previous code does */
287 case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE
):
288 reg
= lis3l02dq_axis_map
[LIS3L02DQ_BIAS
][chan
->address
];
289 ret
= lis3l02dq_spi_read_reg_8(indio_dev
, reg
, (u8
*)&stemp
);
290 /* to match with what previous code does */
298 static ssize_t
lis3l02dq_read_frequency(struct device
*dev
,
299 struct device_attribute
*attr
,
302 struct iio_dev
*indio_dev
= dev_get_drvdata(dev
);
305 ret
= lis3l02dq_spi_read_reg_8(indio_dev
,
306 LIS3L02DQ_REG_CTRL_1_ADDR
,
310 t
&= LIS3L02DQ_DEC_MASK
;
312 case LIS3L02DQ_REG_CTRL_1_DF_128
:
313 len
= sprintf(buf
, "280\n");
315 case LIS3L02DQ_REG_CTRL_1_DF_64
:
316 len
= sprintf(buf
, "560\n");
318 case LIS3L02DQ_REG_CTRL_1_DF_32
:
319 len
= sprintf(buf
, "1120\n");
321 case LIS3L02DQ_REG_CTRL_1_DF_8
:
322 len
= sprintf(buf
, "4480\n");
328 static ssize_t
lis3l02dq_write_frequency(struct device
*dev
,
329 struct device_attribute
*attr
,
333 struct iio_dev
*indio_dev
= dev_get_drvdata(dev
);
338 ret
= strict_strtol(buf
, 10, &val
);
342 mutex_lock(&indio_dev
->mlock
);
343 ret
= lis3l02dq_spi_read_reg_8(indio_dev
,
344 LIS3L02DQ_REG_CTRL_1_ADDR
,
347 goto error_ret_mutex
;
348 /* Wipe the bits clean */
349 t
&= ~LIS3L02DQ_DEC_MASK
;
352 t
|= LIS3L02DQ_REG_CTRL_1_DF_128
;
355 t
|= LIS3L02DQ_REG_CTRL_1_DF_64
;
358 t
|= LIS3L02DQ_REG_CTRL_1_DF_32
;
361 t
|= LIS3L02DQ_REG_CTRL_1_DF_8
;
365 goto error_ret_mutex
;
368 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
369 LIS3L02DQ_REG_CTRL_1_ADDR
,
373 mutex_unlock(&indio_dev
->mlock
);
375 return ret
? ret
: len
;
378 static int lis3l02dq_initial_setup(struct iio_dev
*indio_dev
)
380 struct lis3l02dq_state
*st
= iio_priv(indio_dev
);
384 st
->us
->mode
= SPI_MODE_3
;
388 val
= LIS3L02DQ_DEFAULT_CTRL1
;
389 /* Write suitable defaults to ctrl1 */
390 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
391 LIS3L02DQ_REG_CTRL_1_ADDR
,
394 dev_err(&st
->us
->dev
, "problem with setup control register 1");
397 /* Repeat as sometimes doesn't work first time?*/
398 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
399 LIS3L02DQ_REG_CTRL_1_ADDR
,
402 dev_err(&st
->us
->dev
, "problem with setup control register 1");
406 /* Read back to check this has worked acts as loose test of correct
408 ret
= lis3l02dq_spi_read_reg_8(indio_dev
,
409 LIS3L02DQ_REG_CTRL_1_ADDR
,
411 if (ret
|| (valtest
!= val
)) {
412 dev_err(&indio_dev
->dev
,
413 "device not playing ball %d %d\n", valtest
, val
);
418 val
= LIS3L02DQ_DEFAULT_CTRL2
;
419 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
420 LIS3L02DQ_REG_CTRL_2_ADDR
,
423 dev_err(&st
->us
->dev
, "problem with setup control register 2");
427 val
= LIS3L02DQ_REG_WAKE_UP_CFG_LATCH_SRC
;
428 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
429 LIS3L02DQ_REG_WAKE_UP_CFG_ADDR
,
432 dev_err(&st
->us
->dev
, "problem with interrupt cfg register");
438 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR
| S_IRUGO
,
439 lis3l02dq_read_frequency
,
440 lis3l02dq_write_frequency
);
442 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("280 560 1120 4480");
444 static irqreturn_t
lis3l02dq_event_handler(int irq
, void *private)
446 struct iio_dev
*indio_dev
= private;
449 s64 timestamp
= iio_get_time_ns();
451 lis3l02dq_spi_read_reg_8(indio_dev
,
452 LIS3L02DQ_REG_WAKE_UP_SRC_ADDR
,
455 if (t
& LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Z_HIGH
)
456 iio_push_event(indio_dev
,
457 IIO_MOD_EVENT_CODE(IIO_ACCEL
,
464 if (t
& LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Z_LOW
)
465 iio_push_event(indio_dev
,
466 IIO_MOD_EVENT_CODE(IIO_ACCEL
,
473 if (t
& LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Y_HIGH
)
474 iio_push_event(indio_dev
,
475 IIO_MOD_EVENT_CODE(IIO_ACCEL
,
482 if (t
& LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Y_LOW
)
483 iio_push_event(indio_dev
,
484 IIO_MOD_EVENT_CODE(IIO_ACCEL
,
491 if (t
& LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_X_HIGH
)
492 iio_push_event(indio_dev
,
493 IIO_MOD_EVENT_CODE(IIO_ACCEL
,
500 if (t
& LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_X_LOW
)
501 iio_push_event(indio_dev
,
502 IIO_MOD_EVENT_CODE(IIO_ACCEL
,
509 /* Ack and allow for new interrupts */
510 lis3l02dq_spi_read_reg_8(indio_dev
,
511 LIS3L02DQ_REG_WAKE_UP_ACK_ADDR
,
517 #define LIS3L02DQ_INFO_MASK \
518 ((1 << IIO_CHAN_INFO_SCALE_SHARED) | \
519 (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) | \
520 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE))
522 #define LIS3L02DQ_EVENT_MASK \
523 (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \
524 IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING))
526 static struct iio_chan_spec lis3l02dq_channels
[] = {
527 IIO_CHAN(IIO_ACCEL
, 1, 0, 0, NULL
, 0, IIO_MOD_X
, LIS3L02DQ_INFO_MASK
,
528 0, 0, IIO_ST('s', 12, 16, 0), LIS3L02DQ_EVENT_MASK
),
529 IIO_CHAN(IIO_ACCEL
, 1, 0, 0, NULL
, 0, IIO_MOD_Y
, LIS3L02DQ_INFO_MASK
,
530 1, 1, IIO_ST('s', 12, 16, 0), LIS3L02DQ_EVENT_MASK
),
531 IIO_CHAN(IIO_ACCEL
, 1, 0, 0, NULL
, 0, IIO_MOD_Z
, LIS3L02DQ_INFO_MASK
,
532 2, 2, IIO_ST('s', 12, 16, 0), LIS3L02DQ_EVENT_MASK
),
533 IIO_CHAN_SOFT_TIMESTAMP(3)
537 static ssize_t
lis3l02dq_read_event_config(struct iio_dev
*indio_dev
,
543 u8 mask
= (1 << (IIO_EVENT_CODE_EXTRACT_MODIFIER(event_code
)*2 +
544 (IIO_EVENT_CODE_EXTRACT_DIR(event_code
) ==
545 IIO_EV_DIR_RISING
)));
546 ret
= lis3l02dq_spi_read_reg_8(indio_dev
,
547 LIS3L02DQ_REG_WAKE_UP_CFG_ADDR
,
552 return !!(val
& mask
);
555 int lis3l02dq_disable_all_events(struct iio_dev
*indio_dev
)
560 ret
= lis3l02dq_spi_read_reg_8(indio_dev
,
561 LIS3L02DQ_REG_CTRL_2_ADDR
,
564 control
&= ~LIS3L02DQ_REG_CTRL_2_ENABLE_INTERRUPT
;
565 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
566 LIS3L02DQ_REG_CTRL_2_ADDR
,
570 /* Also for consistency clear the mask */
571 ret
= lis3l02dq_spi_read_reg_8(indio_dev
,
572 LIS3L02DQ_REG_WAKE_UP_CFG_ADDR
,
578 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
579 LIS3L02DQ_REG_WAKE_UP_CFG_ADDR
,
589 static int lis3l02dq_write_event_config(struct iio_dev
*indio_dev
,
596 bool changed
= false;
597 u8 mask
= (1 << (IIO_EVENT_CODE_EXTRACT_MODIFIER(event_code
)*2 +
598 (IIO_EVENT_CODE_EXTRACT_DIR(event_code
) ==
599 IIO_EV_DIR_RISING
)));
601 mutex_lock(&indio_dev
->mlock
);
602 /* read current control */
603 ret
= lis3l02dq_spi_read_reg_8(indio_dev
,
604 LIS3L02DQ_REG_CTRL_2_ADDR
,
608 ret
= lis3l02dq_spi_read_reg_8(indio_dev
,
609 LIS3L02DQ_REG_WAKE_UP_CFG_ADDR
,
613 currentlyset
= val
& mask
;
615 if (!currentlyset
&& state
) {
618 } else if (currentlyset
&& !state
) {
624 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
625 LIS3L02DQ_REG_WAKE_UP_CFG_ADDR
,
629 control
= val
& 0x3f ?
630 (control
| LIS3L02DQ_REG_CTRL_2_ENABLE_INTERRUPT
) :
631 (control
& ~LIS3L02DQ_REG_CTRL_2_ENABLE_INTERRUPT
);
632 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
633 LIS3L02DQ_REG_CTRL_2_ADDR
,
640 mutex_unlock(&indio_dev
->mlock
);
644 static struct attribute
*lis3l02dq_attributes
[] = {
645 &iio_dev_attr_sampling_frequency
.dev_attr
.attr
,
646 &iio_const_attr_sampling_frequency_available
.dev_attr
.attr
,
650 static const struct attribute_group lis3l02dq_attribute_group
= {
651 .attrs
= lis3l02dq_attributes
,
654 static const struct iio_info lis3l02dq_info
= {
655 .read_raw
= &lis3l02dq_read_raw
,
656 .write_raw
= &lis3l02dq_write_raw
,
657 .read_event_value
= &lis3l02dq_read_thresh
,
658 .write_event_value
= &lis3l02dq_write_thresh
,
659 .write_event_config
= &lis3l02dq_write_event_config
,
660 .read_event_config
= &lis3l02dq_read_event_config
,
661 .driver_module
= THIS_MODULE
,
662 .attrs
= &lis3l02dq_attribute_group
,
665 static int __devinit
lis3l02dq_probe(struct spi_device
*spi
)
668 struct lis3l02dq_state
*st
;
669 struct iio_dev
*indio_dev
;
671 indio_dev
= iio_allocate_device(sizeof *st
);
672 if (indio_dev
== NULL
) {
676 st
= iio_priv(indio_dev
);
677 /* this is only used tor removal purposes */
678 spi_set_drvdata(spi
, indio_dev
);
681 mutex_init(&st
->buf_lock
);
682 indio_dev
->name
= spi
->dev
.driver
->name
;
683 indio_dev
->dev
.parent
= &spi
->dev
;
684 indio_dev
->info
= &lis3l02dq_info
;
685 indio_dev
->channels
= lis3l02dq_channels
;
686 indio_dev
->num_channels
= ARRAY_SIZE(lis3l02dq_channels
);
688 indio_dev
->modes
= INDIO_DIRECT_MODE
;
690 ret
= lis3l02dq_configure_buffer(indio_dev
);
694 ret
= iio_buffer_register(indio_dev
,
696 ARRAY_SIZE(lis3l02dq_channels
));
698 printk(KERN_ERR
"failed to initialize the buffer\n");
699 goto error_unreg_buffer_funcs
;
702 if (spi
->irq
&& gpio_is_valid(irq_to_gpio(spi
->irq
)) > 0) {
703 ret
= request_threaded_irq(st
->us
->irq
,
705 &lis3l02dq_event_handler
,
710 goto error_uninitialize_buffer
;
712 ret
= lis3l02dq_probe_trigger(indio_dev
);
714 goto error_free_interrupt
;
717 /* Get the device into a sane initial state */
718 ret
= lis3l02dq_initial_setup(indio_dev
);
720 goto error_remove_trigger
;
722 ret
= iio_device_register(indio_dev
);
724 goto error_remove_trigger
;
728 error_remove_trigger
:
729 if (indio_dev
->modes
& INDIO_BUFFER_TRIGGERED
)
730 lis3l02dq_remove_trigger(indio_dev
);
731 error_free_interrupt
:
732 if (spi
->irq
&& gpio_is_valid(irq_to_gpio(spi
->irq
)) > 0)
733 free_irq(st
->us
->irq
, indio_dev
);
734 error_uninitialize_buffer
:
735 iio_buffer_unregister(indio_dev
);
736 error_unreg_buffer_funcs
:
737 lis3l02dq_unconfigure_buffer(indio_dev
);
739 iio_free_device(indio_dev
);
744 /* Power down the device */
745 static int lis3l02dq_stop_device(struct iio_dev
*indio_dev
)
748 struct lis3l02dq_state
*st
= iio_priv(indio_dev
);
751 mutex_lock(&indio_dev
->mlock
);
752 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
753 LIS3L02DQ_REG_CTRL_1_ADDR
,
756 dev_err(&st
->us
->dev
, "problem with turning device off: ctrl1");
760 ret
= lis3l02dq_spi_write_reg_8(indio_dev
,
761 LIS3L02DQ_REG_CTRL_2_ADDR
,
764 dev_err(&st
->us
->dev
, "problem with turning device off: ctrl2");
766 mutex_unlock(&indio_dev
->mlock
);
770 /* fixme, confirm ordering in this function */
771 static int lis3l02dq_remove(struct spi_device
*spi
)
774 struct iio_dev
*indio_dev
= spi_get_drvdata(spi
);
775 struct lis3l02dq_state
*st
= iio_priv(indio_dev
);
777 ret
= lis3l02dq_disable_all_events(indio_dev
);
781 ret
= lis3l02dq_stop_device(indio_dev
);
785 if (spi
->irq
&& gpio_is_valid(irq_to_gpio(spi
->irq
)) > 0)
786 free_irq(st
->us
->irq
, indio_dev
);
788 lis3l02dq_remove_trigger(indio_dev
);
789 iio_buffer_unregister(indio_dev
);
790 lis3l02dq_unconfigure_buffer(indio_dev
);
792 iio_device_unregister(indio_dev
);
798 static struct spi_driver lis3l02dq_driver
= {
801 .owner
= THIS_MODULE
,
803 .probe
= lis3l02dq_probe
,
804 .remove
= __devexit_p(lis3l02dq_remove
),
807 static __init
int lis3l02dq_init(void)
809 return spi_register_driver(&lis3l02dq_driver
);
811 module_init(lis3l02dq_init
);
813 static __exit
void lis3l02dq_exit(void)
815 spi_unregister_driver(&lis3l02dq_driver
);
817 module_exit(lis3l02dq_exit
);
819 MODULE_AUTHOR("Jonathan Cameron <jic23@cam.ac.uk>");
820 MODULE_DESCRIPTION("ST LIS3L02DQ Accelerometer SPI driver");
821 MODULE_LICENSE("GPL v2");