Commit | Line | Data |
---|---|---|
455fbdd3 PM |
1 | /* |
2 | * lis3lv02d.c - ST LIS3LV02DL accelerometer driver | |
3 | * | |
4 | * Copyright (C) 2007-2008 Yan Burman | |
5 | * Copyright (C) 2008 Eric Piel | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/dmi.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/platform_device.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/input.h> | |
30 | #include <linux/kthread.h> | |
31 | #include <linux/semaphore.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/wait.h> | |
34 | #include <linux/poll.h> | |
35 | #include <linux/freezer.h> | |
455fbdd3 PM |
36 | #include <linux/uaccess.h> |
37 | #include <acpi/acpi_drivers.h> | |
38 | #include <asm/atomic.h> | |
39 | #include "lis3lv02d.h" | |
40 | ||
41 | #define DRIVER_NAME "lis3lv02d" | |
42 | #define ACPI_MDPS_CLASS "accelerometer" | |
43 | ||
44 | /* joystick device poll interval in milliseconds */ | |
45 | #define MDPS_POLL_INTERVAL 50 | |
46 | /* | |
47 | * The sensor can also generate interrupts (DRDY) but it's pretty pointless | |
48 | * because their 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 | |
52 | * joystick. | |
53 | */ | |
54 | ||
55 | /* Maximum value our axis may get for the input device (signed 12 bits) */ | |
56 | #define MDPS_MAX_VAL 2048 | |
57 | ||
58 | struct axis_conversion { | |
59 | s8 x; | |
60 | s8 y; | |
61 | s8 z; | |
62 | }; | |
63 | ||
64 | struct acpi_lis3lv02d { | |
65 | struct acpi_device *device; /* The ACPI device */ | |
66 | struct input_dev *idev; /* input device */ | |
67 | struct task_struct *kthread; /* kthread for input */ | |
68 | struct mutex lock; | |
69 | struct platform_device *pdev; /* platform device */ | |
70 | atomic_t count; /* interrupt count after last read */ | |
71 | int xcalib; /* calibrated null value for x */ | |
72 | int ycalib; /* calibrated null value for y */ | |
73 | int zcalib; /* calibrated null value for z */ | |
74 | unsigned char is_on; /* whether the device is on or off */ | |
75 | unsigned char usage; /* usage counter */ | |
76 | struct axis_conversion ac; /* hw -> logical axis */ | |
77 | }; | |
78 | ||
79 | static struct acpi_lis3lv02d adev; | |
80 | ||
81 | static int lis3lv02d_remove_fs(void); | |
82 | static int lis3lv02d_add_fs(struct acpi_device *device); | |
83 | ||
84 | /* For automatic insertion of the module */ | |
85 | static struct acpi_device_id lis3lv02d_device_ids[] = { | |
86 | {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */ | |
87 | {"", 0}, | |
88 | }; | |
89 | MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids); | |
90 | ||
91 | /** | |
92 | * lis3lv02d_acpi_init - ACPI _INI method: initialize the device. | |
93 | * @handle: the handle of the device | |
94 | * | |
95 | * Returns AE_OK on success. | |
96 | */ | |
97 | static inline acpi_status lis3lv02d_acpi_init(acpi_handle handle) | |
98 | { | |
99 | return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL); | |
100 | } | |
101 | ||
102 | /** | |
103 | * lis3lv02d_acpi_read - ACPI ALRD method: read a register | |
104 | * @handle: the handle of the device | |
105 | * @reg: the register to read | |
106 | * @ret: result of the operation | |
107 | * | |
108 | * Returns AE_OK on success. | |
109 | */ | |
110 | static acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret) | |
111 | { | |
112 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
113 | struct acpi_object_list args = { 1, &arg0 }; | |
114 | unsigned long long lret; | |
115 | acpi_status status; | |
116 | ||
117 | arg0.integer.value = reg; | |
118 | ||
119 | status = acpi_evaluate_integer(handle, "ALRD", &args, &lret); | |
120 | *ret = lret; | |
121 | return status; | |
122 | } | |
123 | ||
124 | /** | |
125 | * lis3lv02d_acpi_write - ACPI ALWR method: write to a register | |
126 | * @handle: the handle of the device | |
127 | * @reg: the register to write to | |
128 | * @val: the value to write | |
129 | * | |
130 | * Returns AE_OK on success. | |
131 | */ | |
132 | static acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val) | |
133 | { | |
134 | unsigned long long ret; /* Not used when writting */ | |
135 | union acpi_object in_obj[2]; | |
136 | struct acpi_object_list args = { 2, in_obj }; | |
137 | ||
138 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
139 | in_obj[0].integer.value = reg; | |
140 | in_obj[1].type = ACPI_TYPE_INTEGER; | |
141 | in_obj[1].integer.value = val; | |
142 | ||
143 | return acpi_evaluate_integer(handle, "ALWR", &args, &ret); | |
144 | } | |
145 | ||
146 | static s16 lis3lv02d_read_16(acpi_handle handle, int reg) | |
147 | { | |
148 | u8 lo, hi; | |
149 | ||
150 | lis3lv02d_acpi_read(handle, reg, &lo); | |
151 | lis3lv02d_acpi_read(handle, reg + 1, &hi); | |
152 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ | |
153 | return (s16)((hi << 8) | lo); | |
154 | } | |
155 | ||
156 | /** | |
157 | * lis3lv02d_get_axis - For the given axis, give the value converted | |
158 | * @axis: 1,2,3 - can also be negative | |
159 | * @hw_values: raw values returned by the hardware | |
160 | * | |
161 | * Returns the converted value. | |
162 | */ | |
163 | static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) | |
164 | { | |
165 | if (axis > 0) | |
166 | return hw_values[axis - 1]; | |
167 | else | |
168 | return -hw_values[-axis - 1]; | |
169 | } | |
170 | ||
171 | /** | |
172 | * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer | |
173 | * @handle: the handle to the device | |
174 | * @x: where to store the X axis value | |
175 | * @y: where to store the Y axis value | |
176 | * @z: where to store the Z axis value | |
177 | * | |
178 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ | |
179 | */ | |
180 | static void lis3lv02d_get_xyz(acpi_handle handle, int *x, int *y, int *z) | |
181 | { | |
182 | int position[3]; | |
183 | ||
184 | position[0] = lis3lv02d_read_16(handle, OUTX_L); | |
185 | position[1] = lis3lv02d_read_16(handle, OUTY_L); | |
186 | position[2] = lis3lv02d_read_16(handle, OUTZ_L); | |
187 | ||
188 | *x = lis3lv02d_get_axis(adev.ac.x, position); | |
189 | *y = lis3lv02d_get_axis(adev.ac.y, position); | |
190 | *z = lis3lv02d_get_axis(adev.ac.z, position); | |
191 | } | |
192 | ||
193 | static inline void lis3lv02d_poweroff(acpi_handle handle) | |
194 | { | |
195 | adev.is_on = 0; | |
196 | /* disable X,Y,Z axis and power down */ | |
197 | lis3lv02d_acpi_write(handle, CTRL_REG1, 0x00); | |
198 | } | |
199 | ||
200 | static void lis3lv02d_poweron(acpi_handle handle) | |
201 | { | |
202 | u8 val; | |
203 | ||
204 | adev.is_on = 1; | |
205 | lis3lv02d_acpi_init(handle); | |
206 | lis3lv02d_acpi_write(handle, FF_WU_CFG, 0); | |
207 | /* | |
208 | * BDU: LSB and MSB values are not updated until both have been read. | |
209 | * So the value read will always be correct. | |
210 | * IEN: Interrupt for free-fall and DD, not for data-ready. | |
211 | */ | |
212 | lis3lv02d_acpi_read(handle, CTRL_REG2, &val); | |
213 | val |= CTRL2_BDU | CTRL2_IEN; | |
214 | lis3lv02d_acpi_write(handle, CTRL_REG2, val); | |
215 | } | |
216 | ||
217 | #ifdef CONFIG_PM | |
218 | static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) | |
219 | { | |
220 | /* make sure the device is off when we suspend */ | |
221 | lis3lv02d_poweroff(device->handle); | |
222 | return 0; | |
223 | } | |
224 | ||
225 | static int lis3lv02d_resume(struct acpi_device *device) | |
226 | { | |
227 | /* put back the device in the right state (ACPI might turn it on) */ | |
228 | mutex_lock(&adev.lock); | |
229 | if (adev.usage > 0) | |
230 | lis3lv02d_poweron(device->handle); | |
231 | else | |
232 | lis3lv02d_poweroff(device->handle); | |
233 | mutex_unlock(&adev.lock); | |
234 | return 0; | |
235 | } | |
236 | #else | |
237 | #define lis3lv02d_suspend NULL | |
238 | #define lis3lv02d_resume NULL | |
239 | #endif | |
240 | ||
241 | ||
242 | /* | |
243 | * To be called before starting to use the device. It makes sure that the | |
244 | * device will always be on until a call to lis3lv02d_decrease_use(). Not to be | |
245 | * used from interrupt context. | |
246 | */ | |
247 | static void lis3lv02d_increase_use(struct acpi_lis3lv02d *dev) | |
248 | { | |
249 | mutex_lock(&dev->lock); | |
250 | dev->usage++; | |
251 | if (dev->usage == 1) { | |
252 | if (!dev->is_on) | |
253 | lis3lv02d_poweron(dev->device->handle); | |
254 | } | |
255 | mutex_unlock(&dev->lock); | |
256 | } | |
257 | ||
258 | /* | |
259 | * To be called whenever a usage of the device is stopped. | |
260 | * It will make sure to turn off the device when there is not usage. | |
261 | */ | |
262 | static void lis3lv02d_decrease_use(struct acpi_lis3lv02d *dev) | |
263 | { | |
264 | mutex_lock(&dev->lock); | |
265 | dev->usage--; | |
266 | if (dev->usage == 0) | |
267 | lis3lv02d_poweroff(dev->device->handle); | |
268 | mutex_unlock(&dev->lock); | |
269 | } | |
270 | ||
271 | /** | |
272 | * lis3lv02d_joystick_kthread - Kthread polling function | |
273 | * @data: unused - here to conform to threadfn prototype | |
274 | */ | |
275 | static int lis3lv02d_joystick_kthread(void *data) | |
276 | { | |
277 | int x, y, z; | |
278 | ||
279 | while (!kthread_should_stop()) { | |
280 | lis3lv02d_get_xyz(adev.device->handle, &x, &y, &z); | |
281 | input_report_abs(adev.idev, ABS_X, x - adev.xcalib); | |
282 | input_report_abs(adev.idev, ABS_Y, y - adev.ycalib); | |
283 | input_report_abs(adev.idev, ABS_Z, z - adev.zcalib); | |
284 | ||
285 | input_sync(adev.idev); | |
286 | ||
287 | try_to_freeze(); | |
288 | msleep_interruptible(MDPS_POLL_INTERVAL); | |
289 | } | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | static int lis3lv02d_joystick_open(struct input_dev *input) | |
295 | { | |
296 | lis3lv02d_increase_use(&adev); | |
297 | adev.kthread = kthread_run(lis3lv02d_joystick_kthread, NULL, "klis3lv02d"); | |
298 | if (IS_ERR(adev.kthread)) { | |
299 | lis3lv02d_decrease_use(&adev); | |
300 | return PTR_ERR(adev.kthread); | |
301 | } | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | static void lis3lv02d_joystick_close(struct input_dev *input) | |
307 | { | |
308 | kthread_stop(adev.kthread); | |
309 | lis3lv02d_decrease_use(&adev); | |
310 | } | |
311 | ||
312 | ||
313 | static inline void lis3lv02d_calibrate_joystick(void) | |
314 | { | |
315 | lis3lv02d_get_xyz(adev.device->handle, &adev.xcalib, &adev.ycalib, &adev.zcalib); | |
316 | } | |
317 | ||
318 | static int lis3lv02d_joystick_enable(void) | |
319 | { | |
320 | int err; | |
321 | ||
322 | if (adev.idev) | |
323 | return -EINVAL; | |
324 | ||
325 | adev.idev = input_allocate_device(); | |
326 | if (!adev.idev) | |
327 | return -ENOMEM; | |
328 | ||
329 | lis3lv02d_calibrate_joystick(); | |
330 | ||
331 | adev.idev->name = "ST LIS3LV02DL Accelerometer"; | |
332 | adev.idev->phys = DRIVER_NAME "/input0"; | |
333 | adev.idev->id.bustype = BUS_HOST; | |
334 | adev.idev->id.vendor = 0; | |
335 | adev.idev->dev.parent = &adev.pdev->dev; | |
336 | adev.idev->open = lis3lv02d_joystick_open; | |
337 | adev.idev->close = lis3lv02d_joystick_close; | |
338 | ||
339 | set_bit(EV_ABS, adev.idev->evbit); | |
340 | input_set_abs_params(adev.idev, ABS_X, -MDPS_MAX_VAL, MDPS_MAX_VAL, 3, 3); | |
341 | input_set_abs_params(adev.idev, ABS_Y, -MDPS_MAX_VAL, MDPS_MAX_VAL, 3, 3); | |
342 | input_set_abs_params(adev.idev, ABS_Z, -MDPS_MAX_VAL, MDPS_MAX_VAL, 3, 3); | |
343 | ||
344 | err = input_register_device(adev.idev); | |
345 | if (err) { | |
346 | input_free_device(adev.idev); | |
347 | adev.idev = NULL; | |
348 | } | |
349 | ||
350 | return err; | |
351 | } | |
352 | ||
353 | static void lis3lv02d_joystick_disable(void) | |
354 | { | |
355 | if (!adev.idev) | |
356 | return; | |
357 | ||
358 | input_unregister_device(adev.idev); | |
359 | adev.idev = NULL; | |
360 | } | |
361 | ||
362 | ||
363 | /* | |
364 | * Initialise the accelerometer and the various subsystems. | |
365 | * Should be rather independant of the bus system. | |
366 | */ | |
367 | static int lis3lv02d_init_device(struct acpi_lis3lv02d *dev) | |
368 | { | |
369 | mutex_init(&dev->lock); | |
370 | lis3lv02d_add_fs(dev->device); | |
371 | lis3lv02d_increase_use(dev); | |
372 | ||
373 | if (lis3lv02d_joystick_enable()) | |
374 | printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n"); | |
375 | ||
376 | lis3lv02d_decrease_use(dev); | |
377 | return 0; | |
378 | } | |
379 | ||
380 | static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) | |
381 | { | |
382 | adev.ac = *((struct axis_conversion *)dmi->driver_data); | |
383 | printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident); | |
384 | ||
385 | return 1; | |
386 | } | |
387 | ||
388 | /* Represents, for each axis seen by userspace, the corresponding hw axis (+1). | |
389 | * If the value is negative, the opposite of the hw value is used. */ | |
390 | static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3}; | |
391 | static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3}; | |
392 | static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3}; | |
393 | static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3}; | |
394 | static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3}; | |
395 | static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3}; | |
396 | ||
397 | #define AXIS_DMI_MATCH(_ident, _name, _axis) { \ | |
398 | .ident = _ident, \ | |
399 | .callback = lis3lv02d_dmi_matched, \ | |
400 | .matches = { \ | |
401 | DMI_MATCH(DMI_PRODUCT_NAME, _name) \ | |
402 | }, \ | |
403 | .driver_data = &lis3lv02d_axis_##_axis \ | |
404 | } | |
405 | static struct dmi_system_id lis3lv02d_dmi_ids[] = { | |
406 | /* product names are truncated to match all kinds of a same model */ | |
407 | AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted), | |
408 | AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted), | |
409 | AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted), | |
410 | AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted), | |
411 | AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted), | |
412 | AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted), | |
413 | AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left), | |
414 | { NULL, } | |
415 | /* Laptop models without axis info (yet): | |
416 | * "NC651xx" "HP Compaq 651" | |
417 | * "NC671xx" "HP Compaq 671" | |
418 | * "NC6910" "HP Compaq 6910" | |
419 | * HP Compaq 8710x Notebook PC / Mobile Workstation | |
420 | * "NC2400" "HP Compaq nc2400" | |
421 | * "NX74x0" "HP Compaq nx74" | |
422 | * "NX6325" "HP Compaq nx6325" | |
423 | * "NC4400" "HP Compaq nc4400" | |
424 | */ | |
425 | }; | |
426 | ||
427 | static int lis3lv02d_add(struct acpi_device *device) | |
428 | { | |
429 | u8 val; | |
430 | ||
431 | if (!device) | |
432 | return -EINVAL; | |
433 | ||
434 | adev.device = device; | |
435 | strcpy(acpi_device_name(device), DRIVER_NAME); | |
436 | strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); | |
437 | device->driver_data = &adev; | |
438 | ||
439 | lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val); | |
440 | if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) { | |
441 | printk(KERN_ERR DRIVER_NAME | |
442 | ": Accelerometer chip not LIS3LV02D{L,Q}\n"); | |
443 | } | |
444 | ||
445 | /* If possible use a "standard" axes order */ | |
446 | if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { | |
447 | printk(KERN_INFO DRIVER_NAME ": laptop model unknown, " | |
448 | "using default axes configuration\n"); | |
449 | adev.ac = lis3lv02d_axis_normal; | |
450 | } | |
451 | ||
452 | return lis3lv02d_init_device(&adev); | |
453 | } | |
454 | ||
455 | static int lis3lv02d_remove(struct acpi_device *device, int type) | |
456 | { | |
457 | if (!device) | |
458 | return -EINVAL; | |
459 | ||
460 | lis3lv02d_joystick_disable(); | |
461 | lis3lv02d_poweroff(device->handle); | |
462 | ||
463 | return lis3lv02d_remove_fs(); | |
464 | } | |
465 | ||
466 | ||
467 | /* Sysfs stuff */ | |
468 | static ssize_t lis3lv02d_position_show(struct device *dev, | |
469 | struct device_attribute *attr, char *buf) | |
470 | { | |
471 | int x, y, z; | |
472 | ||
473 | lis3lv02d_increase_use(&adev); | |
474 | lis3lv02d_get_xyz(adev.device->handle, &x, &y, &z); | |
475 | lis3lv02d_decrease_use(&adev); | |
476 | return sprintf(buf, "(%d,%d,%d)\n", x, y, z); | |
477 | } | |
478 | ||
479 | static ssize_t lis3lv02d_calibrate_show(struct device *dev, | |
480 | struct device_attribute *attr, char *buf) | |
481 | { | |
482 | return sprintf(buf, "(%d,%d,%d)\n", adev.xcalib, adev.ycalib, adev.zcalib); | |
483 | } | |
484 | ||
485 | static ssize_t lis3lv02d_calibrate_store(struct device *dev, | |
486 | struct device_attribute *attr, | |
487 | const char *buf, size_t count) | |
488 | { | |
489 | lis3lv02d_increase_use(&adev); | |
490 | lis3lv02d_calibrate_joystick(); | |
491 | lis3lv02d_decrease_use(&adev); | |
492 | return count; | |
493 | } | |
494 | ||
495 | /* conversion btw sampling rate and the register values */ | |
496 | static int lis3lv02dl_df_val[4] = {40, 160, 640, 2560}; | |
497 | static ssize_t lis3lv02d_rate_show(struct device *dev, | |
498 | struct device_attribute *attr, char *buf) | |
499 | { | |
500 | u8 ctrl; | |
501 | int val; | |
502 | ||
503 | lis3lv02d_increase_use(&adev); | |
504 | lis3lv02d_acpi_read(adev.device->handle, CTRL_REG1, &ctrl); | |
505 | lis3lv02d_decrease_use(&adev); | |
506 | val = (ctrl & (CTRL1_DF0 | CTRL1_DF1)) >> 4; | |
507 | return sprintf(buf, "%d\n", lis3lv02dl_df_val[val]); | |
508 | } | |
509 | ||
510 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); | |
511 | static DEVICE_ATTR(calibrate, S_IRUGO|S_IWUSR, lis3lv02d_calibrate_show, | |
512 | lis3lv02d_calibrate_store); | |
513 | static DEVICE_ATTR(rate, S_IRUGO, lis3lv02d_rate_show, NULL); | |
514 | ||
515 | static struct attribute *lis3lv02d_attributes[] = { | |
516 | &dev_attr_position.attr, | |
517 | &dev_attr_calibrate.attr, | |
518 | &dev_attr_rate.attr, | |
519 | NULL | |
520 | }; | |
521 | ||
522 | static struct attribute_group lis3lv02d_attribute_group = { | |
523 | .attrs = lis3lv02d_attributes | |
524 | }; | |
525 | ||
526 | static int lis3lv02d_add_fs(struct acpi_device *device) | |
527 | { | |
528 | adev.pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); | |
529 | if (IS_ERR(adev.pdev)) | |
530 | return PTR_ERR(adev.pdev); | |
531 | ||
532 | return sysfs_create_group(&adev.pdev->dev.kobj, &lis3lv02d_attribute_group); | |
533 | } | |
534 | ||
535 | static int lis3lv02d_remove_fs(void) | |
536 | { | |
537 | sysfs_remove_group(&adev.pdev->dev.kobj, &lis3lv02d_attribute_group); | |
538 | platform_device_unregister(adev.pdev); | |
539 | return 0; | |
540 | } | |
541 | ||
542 | /* For the HP MDPS aka 3D Driveguard */ | |
543 | static struct acpi_driver lis3lv02d_driver = { | |
544 | .name = DRIVER_NAME, | |
545 | .class = ACPI_MDPS_CLASS, | |
546 | .ids = lis3lv02d_device_ids, | |
547 | .ops = { | |
548 | .add = lis3lv02d_add, | |
549 | .remove = lis3lv02d_remove, | |
550 | .suspend = lis3lv02d_suspend, | |
551 | .resume = lis3lv02d_resume, | |
552 | } | |
553 | }; | |
554 | ||
555 | static int __init lis3lv02d_init_module(void) | |
556 | { | |
557 | int ret; | |
558 | ||
559 | if (acpi_disabled) | |
560 | return -ENODEV; | |
561 | ||
562 | ret = acpi_bus_register_driver(&lis3lv02d_driver); | |
563 | if (ret < 0) | |
564 | return ret; | |
565 | ||
566 | printk(KERN_INFO DRIVER_NAME " driver loaded.\n"); | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | static void __exit lis3lv02d_exit_module(void) | |
572 | { | |
573 | acpi_bus_unregister_driver(&lis3lv02d_driver); | |
574 | } | |
575 | ||
576 | MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver"); | |
577 | MODULE_AUTHOR("Yan Burman and Eric Piel"); | |
578 | MODULE_LICENSE("GPL"); | |
579 | ||
580 | module_init(lis3lv02d_init_module); | |
581 | module_exit(lis3lv02d_exit_module); |