2 * lis3lv02d.c - ST LIS3LV02DL accelerometer driver
4 * Copyright (C) 2007-2008 Yan Burman
5 * Copyright (C) 2008 Eric Piel
6 * Copyright (C) 2008-2009 Pavel Machek
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/dmi.h>
26 #include <linux/module.h>
27 #include <linux/types.h>
28 #include <linux/platform_device.h>
29 #include <linux/interrupt.h>
30 #include <linux/input-polldev.h>
31 #include <linux/delay.h>
32 #include <linux/wait.h>
33 #include <linux/poll.h>
34 #include <linux/freezer.h>
35 #include <linux/uaccess.h>
36 #include <linux/miscdevice.h>
37 #include <asm/atomic.h>
38 #include "lis3lv02d.h"
40 #define DRIVER_NAME "lis3lv02d"
42 /* joystick device poll interval in milliseconds */
43 #define MDPS_POLL_INTERVAL 50
44 #define MDPS_POLL_MIN 0
45 #define MDPS_POLL_MAX 2000
47 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
48 * because they are generated even if the data do not change. So it's better
49 * to keep the interrupt for the free-fall event. The values are updated at
50 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
51 * some low processor, we poll the sensor only at 20Hz... enough for the
55 #define LIS3_PWRON_DELAY_WAI_12B (5000)
56 #define LIS3_PWRON_DELAY_WAI_8B (3000)
59 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
60 * LIS302D spec says: 18 mG / digit
61 * LIS3_ACCURACY is used to increase accuracy of the intermediate
62 * calculation results.
64 #define LIS3_ACCURACY 1024
65 /* Sensitivity values for -2G +2G scale */
66 #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
67 #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
69 #define LIS3_DEFAULT_FUZZ 3
70 #define LIS3_DEFAULT_FLAT 3
72 struct lis3lv02d lis3_dev = {
73 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
76 EXPORT_SYMBOL_GPL(lis3_dev);
78 static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
81 if (lis3->read(lis3, reg, &lo) < 0)
87 static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
91 lis3->read(lis3, reg - 1, &lo);
92 lis3->read(lis3, reg, &hi);
93 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
94 return (s16)((hi << 8) | lo);
98 * lis3lv02d_get_axis - For the given axis, give the value converted
99 * @axis: 1,2,3 - can also be negative
100 * @hw_values: raw values returned by the hardware
102 * Returns the converted value.
104 static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
107 return hw_values[axis - 1];
109 return -hw_values[-axis - 1];
113 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
114 * @lis3: pointer to the device struct
115 * @x: where to store the X axis value
116 * @y: where to store the Y axis value
117 * @z: where to store the Z axis value
119 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
121 static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
126 position[0] = lis3->read_data(lis3, OUTX);
127 position[1] = lis3->read_data(lis3, OUTY);
128 position[2] = lis3->read_data(lis3, OUTZ);
130 for (i = 0; i < 3; i++)
131 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
133 *x = lis3lv02d_get_axis(lis3->ac.x, position);
134 *y = lis3lv02d_get_axis(lis3->ac.y, position);
135 *z = lis3lv02d_get_axis(lis3->ac.z, position);
138 /* conversion btw sampling rate and the register values */
139 static int lis3_12_rates[4] = {40, 160, 640, 2560};
140 static int lis3_8_rates[2] = {100, 400};
141 static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
143 /* ODR is Output Data Rate */
144 static int lis3lv02d_get_odr(void)
149 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
150 ctrl &= lis3_dev.odr_mask;
151 shift = ffs(lis3_dev.odr_mask) - 1;
152 return lis3_dev.odrs[(ctrl >> shift)];
155 static int lis3lv02d_set_odr(int rate)
163 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
164 ctrl &= ~lis3_dev.odr_mask;
165 len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */
166 shift = ffs(lis3_dev.odr_mask) - 1;
168 for (i = 0; i < len; i++)
169 if (lis3_dev.odrs[i] == rate) {
170 lis3_dev.write(&lis3_dev, CTRL_REG1,
171 ctrl | (i << shift));
177 static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
184 mutex_lock(&lis3->mutex);
185 if (lis3_dev.whoami == WAI_3DC) {
187 selftest = CTRL4_ST0;
190 if (lis3_dev.whoami == WAI_12B)
193 selftest = CTRL1_STP;
196 lis3->read(lis3, ctlreg, ®);
197 lis3->write(lis3, ctlreg, (reg | selftest));
198 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
200 /* Read directly to avoid axis remap */
201 x = lis3->read_data(lis3, OUTX);
202 y = lis3->read_data(lis3, OUTY);
203 z = lis3->read_data(lis3, OUTZ);
205 /* back to normal settings */
206 lis3->write(lis3, ctlreg, reg);
207 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
209 results[0] = x - lis3->read_data(lis3, OUTX);
210 results[1] = y - lis3->read_data(lis3, OUTY);
211 results[2] = z - lis3->read_data(lis3, OUTZ);
216 for (i = 0; i < 3; i++) {
217 /* Check against selftest acceptance limits */
218 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
219 (results[i] > lis3->pdata->st_max_limits[i])) {
228 mutex_unlock(&lis3->mutex);
232 void lis3lv02d_poweroff(struct lis3lv02d *lis3)
234 /* disable X,Y,Z axis and power down */
235 lis3->write(lis3, CTRL_REG1, 0x00);
237 EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
239 void lis3lv02d_poweron(struct lis3lv02d *lis3)
245 /* LIS3 power on delay is quite long */
246 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
249 * Common configuration
250 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
251 * both have been read. So the value read will always be correct.
253 if (lis3->whoami == WAI_12B) {
254 lis3->read(lis3, CTRL_REG2, ®);
256 lis3->write(lis3, CTRL_REG2, reg);
259 EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
262 static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
266 mutex_lock(&lis3_dev.mutex);
267 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
268 input_report_abs(pidev->input, ABS_X, x);
269 input_report_abs(pidev->input, ABS_Y, y);
270 input_report_abs(pidev->input, ABS_Z, z);
271 input_sync(pidev->input);
272 mutex_unlock(&lis3_dev.mutex);
275 static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
277 if (!test_bit(0, &lis3_dev.misc_opened))
281 * Be careful: on some HP laptops the bios force DD when on battery and
282 * the lid is closed. This leads to interrupts as soon as a little move
285 atomic_inc(&lis3_dev.count);
287 wake_up_interruptible(&lis3_dev.misc_wait);
288 kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN);
290 if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev &&
291 lis3_dev.idev->input->users)
292 return IRQ_WAKE_THREAD;
296 static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
298 struct input_dev *dev = lis3->idev->input;
301 mutex_lock(&lis3->mutex);
302 lis3->read(lis3, CLICK_SRC, &click_src);
304 if (click_src & CLICK_SINGLE_X) {
305 input_report_key(dev, lis3->mapped_btns[0], 1);
306 input_report_key(dev, lis3->mapped_btns[0], 0);
309 if (click_src & CLICK_SINGLE_Y) {
310 input_report_key(dev, lis3->mapped_btns[1], 1);
311 input_report_key(dev, lis3->mapped_btns[1], 0);
314 if (click_src & CLICK_SINGLE_Z) {
315 input_report_key(dev, lis3->mapped_btns[2], 1);
316 input_report_key(dev, lis3->mapped_btns[2], 0);
319 mutex_unlock(&lis3->mutex);
322 static void lis302dl_interrupt_handle_ff_wu(struct lis3lv02d *lis3)
327 lis3->read(lis3, FF_WU_SRC_1, &wu1_src);
328 lis3->read(lis3, FF_WU_SRC_2, &wu2_src);
330 wu1_src = wu1_src & FF_WU_SRC_IA ? wu1_src : 0;
331 wu2_src = wu2_src & FF_WU_SRC_IA ? wu2_src : 0;
333 /* joystick poll is internally protected by the lis3->mutex. */
334 if (wu1_src || wu2_src)
335 lis3lv02d_joystick_poll(lis3_dev.idev);
338 static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
341 struct lis3lv02d *lis3 = data;
343 if ((lis3->pdata->irq_cfg & LIS3_IRQ1_MASK) == LIS3_IRQ1_CLICK)
344 lis302dl_interrupt_handle_click(lis3);
346 lis302dl_interrupt_handle_ff_wu(lis3);
351 static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
354 struct lis3lv02d *lis3 = data;
356 if ((lis3->pdata->irq_cfg & LIS3_IRQ2_MASK) == LIS3_IRQ2_CLICK)
357 lis302dl_interrupt_handle_click(lis3);
359 lis302dl_interrupt_handle_ff_wu(lis3);
364 static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
366 if (test_and_set_bit(0, &lis3_dev.misc_opened))
367 return -EBUSY; /* already open */
369 atomic_set(&lis3_dev.count, 0);
373 static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
375 fasync_helper(-1, file, 0, &lis3_dev.async_queue);
376 clear_bit(0, &lis3_dev.misc_opened); /* release the device */
380 static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
381 size_t count, loff_t *pos)
383 DECLARE_WAITQUEUE(wait, current);
385 unsigned char byte_data;
391 add_wait_queue(&lis3_dev.misc_wait, &wait);
393 set_current_state(TASK_INTERRUPTIBLE);
394 data = atomic_xchg(&lis3_dev.count, 0);
398 if (file->f_flags & O_NONBLOCK) {
403 if (signal_pending(current)) {
404 retval = -ERESTARTSYS;
416 /* make sure we are not going into copy_to_user() with
417 * TASK_INTERRUPTIBLE state */
418 set_current_state(TASK_RUNNING);
419 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
423 __set_current_state(TASK_RUNNING);
424 remove_wait_queue(&lis3_dev.misc_wait, &wait);
429 static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
431 poll_wait(file, &lis3_dev.misc_wait, wait);
432 if (atomic_read(&lis3_dev.count))
433 return POLLIN | POLLRDNORM;
437 static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
439 return fasync_helper(fd, file, on, &lis3_dev.async_queue);
442 static const struct file_operations lis3lv02d_misc_fops = {
443 .owner = THIS_MODULE,
445 .read = lis3lv02d_misc_read,
446 .open = lis3lv02d_misc_open,
447 .release = lis3lv02d_misc_release,
448 .poll = lis3lv02d_misc_poll,
449 .fasync = lis3lv02d_misc_fasync,
452 static struct miscdevice lis3lv02d_misc_device = {
453 .minor = MISC_DYNAMIC_MINOR,
455 .fops = &lis3lv02d_misc_fops,
458 int lis3lv02d_joystick_enable(void)
460 struct input_dev *input_dev;
462 int max_val, fuzz, flat;
463 int btns[] = {BTN_X, BTN_Y, BTN_Z};
468 lis3_dev.idev = input_allocate_polled_device();
472 lis3_dev.idev->poll = lis3lv02d_joystick_poll;
473 lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
474 lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN;
475 lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX;
476 input_dev = lis3_dev.idev->input;
478 input_dev->name = "ST LIS3LV02DL Accelerometer";
479 input_dev->phys = DRIVER_NAME "/input0";
480 input_dev->id.bustype = BUS_HOST;
481 input_dev->id.vendor = 0;
482 input_dev->dev.parent = &lis3_dev.pdev->dev;
484 set_bit(EV_ABS, input_dev->evbit);
485 max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
486 fuzz = (LIS3_DEFAULT_FUZZ * lis3_dev.scale) / LIS3_ACCURACY;
487 flat = (LIS3_DEFAULT_FLAT * lis3_dev.scale) / LIS3_ACCURACY;
488 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
489 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
490 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
492 lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns);
493 lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns);
494 lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns);
496 err = input_register_polled_device(lis3_dev.idev);
498 input_free_polled_device(lis3_dev.idev);
499 lis3_dev.idev = NULL;
504 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
506 void lis3lv02d_joystick_disable(void)
509 free_irq(lis3_dev.irq, &lis3_dev);
510 if (lis3_dev.pdata && lis3_dev.pdata->irq2)
511 free_irq(lis3_dev.pdata->irq2, &lis3_dev);
517 misc_deregister(&lis3lv02d_misc_device);
518 input_unregister_polled_device(lis3_dev.idev);
519 input_free_polled_device(lis3_dev.idev);
520 lis3_dev.idev = NULL;
522 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
525 static ssize_t lis3lv02d_selftest_show(struct device *dev,
526 struct device_attribute *attr, char *buf)
531 result = lis3lv02d_selftest(&lis3_dev, values);
532 return sprintf(buf, "%s %d %d %d\n", result == 0 ? "OK" : "FAIL",
533 values[0], values[1], values[2]);
536 static ssize_t lis3lv02d_position_show(struct device *dev,
537 struct device_attribute *attr, char *buf)
541 mutex_lock(&lis3_dev.mutex);
542 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
543 mutex_unlock(&lis3_dev.mutex);
544 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
547 static ssize_t lis3lv02d_rate_show(struct device *dev,
548 struct device_attribute *attr, char *buf)
550 return sprintf(buf, "%d\n", lis3lv02d_get_odr());
553 static ssize_t lis3lv02d_rate_set(struct device *dev,
554 struct device_attribute *attr, const char *buf,
559 if (strict_strtoul(buf, 0, &rate))
562 if (lis3lv02d_set_odr(rate))
568 static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
569 static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
570 static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
573 static struct attribute *lis3lv02d_attributes[] = {
574 &dev_attr_selftest.attr,
575 &dev_attr_position.attr,
580 static struct attribute_group lis3lv02d_attribute_group = {
581 .attrs = lis3lv02d_attributes
585 static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
587 lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
588 if (IS_ERR(lis3->pdev))
589 return PTR_ERR(lis3->pdev);
591 return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
594 int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
596 sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
597 platform_device_unregister(lis3->pdev);
600 EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
602 static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
603 struct lis3lv02d_platform_data *p)
606 int ctrl2 = p->hipass_ctrl;
608 if (p->click_flags) {
609 dev->write(dev, CLICK_CFG, p->click_flags);
610 dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit);
611 dev->write(dev, CLICK_LATENCY, p->click_latency);
612 dev->write(dev, CLICK_WINDOW, p->click_window);
613 dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf);
614 dev->write(dev, CLICK_THSY_X,
615 (p->click_thresh_x & 0xf) |
616 (p->click_thresh_y << 4));
619 struct input_dev *input_dev = lis3_dev.idev->input;
620 input_set_capability(input_dev, EV_KEY, BTN_X);
621 input_set_capability(input_dev, EV_KEY, BTN_Y);
622 input_set_capability(input_dev, EV_KEY, BTN_Z);
626 if (p->wakeup_flags) {
627 dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
628 dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
629 /* default to 2.5ms for now */
630 dev->write(dev, FF_WU_DURATION_1, 1);
631 ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
634 if (p->wakeup_flags2) {
635 dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2);
636 dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
637 /* default to 2.5ms for now */
638 dev->write(dev, FF_WU_DURATION_2, 1);
639 ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
641 /* Configure hipass filters */
642 dev->write(dev, CTRL_REG2, ctrl2);
645 err = request_threaded_irq(p->irq2,
647 lis302dl_interrupt_thread2_8b,
648 IRQF_TRIGGER_RISING |
650 DRIVER_NAME, &lis3_dev);
652 printk(KERN_ERR DRIVER_NAME
653 "No second IRQ. Limited functionality\n");
658 * Initialise the accelerometer and the various subsystems.
659 * Should be rather independent of the bus system.
661 int lis3lv02d_init_device(struct lis3lv02d *dev)
664 irq_handler_t thread_fn;
666 dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
668 switch (dev->whoami) {
670 printk(KERN_INFO DRIVER_NAME ": 12 bits sensor found\n");
671 dev->read_data = lis3lv02d_read_12;
672 dev->mdps_max_val = 2048;
673 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
674 dev->odrs = lis3_12_rates;
675 dev->odr_mask = CTRL1_DF0 | CTRL1_DF1;
676 dev->scale = LIS3_SENSITIVITY_12B;
679 printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n");
680 dev->read_data = lis3lv02d_read_8;
681 dev->mdps_max_val = 128;
682 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
683 dev->odrs = lis3_8_rates;
684 dev->odr_mask = CTRL1_DR;
685 dev->scale = LIS3_SENSITIVITY_8B;
688 printk(KERN_INFO DRIVER_NAME ": 8 bits 3DC sensor found\n");
689 dev->read_data = lis3lv02d_read_8;
690 dev->mdps_max_val = 128;
691 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
692 dev->odrs = lis3_3dc_rates;
693 dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
694 dev->scale = LIS3_SENSITIVITY_8B;
697 printk(KERN_ERR DRIVER_NAME
698 ": unknown sensor type 0x%X\n", dev->whoami);
702 mutex_init(&dev->mutex);
704 lis3lv02d_add_fs(dev);
705 lis3lv02d_poweron(dev);
707 if (lis3lv02d_joystick_enable())
708 printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n");
710 /* passing in platform specific data is purely optional and only
711 * used by the SPI transport layer at the moment */
713 struct lis3lv02d_platform_data *p = dev->pdata;
715 if (dev->whoami == WAI_8B)
716 lis3lv02d_8b_configure(dev, p);
719 dev->write(dev, CTRL_REG3, p->irq_cfg);
722 /* bail if we did not get an IRQ from the bus layer */
724 printk(KERN_ERR DRIVER_NAME
725 ": No IRQ. Disabling /dev/freefall\n");
730 * The sensor can generate interrupts for free-fall and direction
731 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
732 * the things simple and _fast_ we activate it only for free-fall, so
733 * no need to read register (very slow with ACPI). For the same reason,
734 * we forbid shared interrupts.
736 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
737 * io-apic is not configurable (and generates a warning) but I keep it
738 * in case of support for other hardware.
740 if (dev->pdata && dev->whoami == WAI_8B)
741 thread_fn = lis302dl_interrupt_thread1_8b;
745 err = request_threaded_irq(dev->irq, lis302dl_interrupt,
747 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
748 DRIVER_NAME, &lis3_dev);
751 printk(KERN_ERR DRIVER_NAME "Cannot get IRQ\n");
755 if (misc_register(&lis3lv02d_misc_device))
756 printk(KERN_ERR DRIVER_NAME ": misc_register failed\n");
760 EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
762 MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
763 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
764 MODULE_LICENSE("GPL");