Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * acpi_button.c - ACPI Button Driver ($Revision: 30 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
b34a8030 AS |
29 | #include <linux/types.h> |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/seq_file.h> | |
1da177e4 LT |
32 | #include <acpi/acpi_bus.h> |
33 | #include <acpi/acpi_drivers.h> | |
34 | ||
1da177e4 LT |
35 | #define ACPI_BUTTON_COMPONENT 0x00080000 |
36 | #define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver" | |
37 | #define ACPI_BUTTON_CLASS "button" | |
b34a8030 AS |
38 | #define ACPI_BUTTON_FILE_INFO "info" |
39 | #define ACPI_BUTTON_FILE_STATE "state" | |
40 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
41 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
42 | ||
43 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
4be44fcd | 44 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
1da177e4 LT |
45 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)" |
46 | #define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)" | |
47 | #define ACPI_BUTTON_TYPE_POWER 0x01 | |
48 | #define ACPI_BUTTON_TYPE_POWERF 0x02 | |
49 | ||
50 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
51 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
52 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)" | |
53 | #define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)" | |
54 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 | |
55 | #define ACPI_BUTTON_TYPE_SLEEPF 0x04 | |
56 | ||
57 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
58 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
59 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
60 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
61 | ||
62 | #define _COMPONENT ACPI_BUTTON_COMPONENT | |
4be44fcd | 63 | ACPI_MODULE_NAME("acpi_button") |
1da177e4 | 64 | |
4be44fcd | 65 | MODULE_AUTHOR("Paul Diefenbaugh"); |
1da177e4 LT |
66 | MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME); |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
4be44fcd LB |
69 | static int acpi_button_add(struct acpi_device *device); |
70 | static int acpi_button_remove(struct acpi_device *device, int type); | |
b34a8030 AS |
71 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file); |
72 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file); | |
1da177e4 LT |
73 | |
74 | static struct acpi_driver acpi_button_driver = { | |
4be44fcd LB |
75 | .name = ACPI_BUTTON_DRIVER_NAME, |
76 | .class = ACPI_BUTTON_CLASS, | |
77 | .ids = "ACPI_FPB,ACPI_FSB,PNP0C0D,PNP0C0C,PNP0C0E", | |
78 | .ops = { | |
79 | .add = acpi_button_add, | |
80 | .remove = acpi_button_remove, | |
81 | }, | |
1da177e4 LT |
82 | }; |
83 | ||
84 | struct acpi_button { | |
4be44fcd LB |
85 | struct acpi_device *device; /* Fixed button kludge */ |
86 | u8 type; | |
87 | unsigned long pushed; | |
1da177e4 LT |
88 | }; |
89 | ||
d7508032 | 90 | static const struct file_operations acpi_button_info_fops = { |
4be44fcd LB |
91 | .open = acpi_button_info_open_fs, |
92 | .read = seq_read, | |
93 | .llseek = seq_lseek, | |
94 | .release = single_release, | |
b34a8030 AS |
95 | }; |
96 | ||
d7508032 | 97 | static const struct file_operations acpi_button_state_fops = { |
4be44fcd LB |
98 | .open = acpi_button_state_open_fs, |
99 | .read = seq_read, | |
100 | .llseek = seq_lseek, | |
101 | .release = single_release, | |
b34a8030 | 102 | }; |
4be44fcd | 103 | |
b34a8030 AS |
104 | /* -------------------------------------------------------------------------- |
105 | FS Interface (/proc) | |
106 | -------------------------------------------------------------------------- */ | |
107 | ||
4be44fcd | 108 | static struct proc_dir_entry *acpi_button_dir; |
b34a8030 AS |
109 | |
110 | static int acpi_button_info_seq_show(struct seq_file *seq, void *offset) | |
111 | { | |
4be44fcd | 112 | struct acpi_button *button = (struct acpi_button *)seq->private; |
b34a8030 | 113 | |
b34a8030 AS |
114 | |
115 | if (!button || !button->device) | |
d550d98d | 116 | return 0; |
b34a8030 | 117 | |
4be44fcd LB |
118 | seq_printf(seq, "type: %s\n", |
119 | acpi_device_name(button->device)); | |
b34a8030 | 120 | |
d550d98d | 121 | return 0; |
b34a8030 AS |
122 | } |
123 | ||
124 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file) | |
125 | { | |
126 | return single_open(file, acpi_button_info_seq_show, PDE(inode)->data); | |
127 | } | |
4be44fcd | 128 | |
b34a8030 AS |
129 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
130 | { | |
4be44fcd LB |
131 | struct acpi_button *button = (struct acpi_button *)seq->private; |
132 | acpi_status status; | |
133 | unsigned long state; | |
b34a8030 | 134 | |
b34a8030 AS |
135 | |
136 | if (!button || !button->device) | |
d550d98d | 137 | return 0; |
b34a8030 | 138 | |
27b1d3e8 | 139 | status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state); |
b34a8030 AS |
140 | if (ACPI_FAILURE(status)) { |
141 | seq_printf(seq, "state: unsupported\n"); | |
4be44fcd LB |
142 | } else { |
143 | seq_printf(seq, "state: %s\n", | |
144 | (state ? "open" : "closed")); | |
b34a8030 AS |
145 | } |
146 | ||
d550d98d | 147 | return 0; |
b34a8030 AS |
148 | } |
149 | ||
150 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file) | |
151 | { | |
152 | return single_open(file, acpi_button_state_seq_show, PDE(inode)->data); | |
153 | } | |
154 | ||
155 | static struct proc_dir_entry *acpi_power_dir; | |
156 | static struct proc_dir_entry *acpi_sleep_dir; | |
157 | static struct proc_dir_entry *acpi_lid_dir; | |
158 | ||
4be44fcd | 159 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 160 | { |
4be44fcd LB |
161 | struct proc_dir_entry *entry = NULL; |
162 | struct acpi_button *button = NULL; | |
b34a8030 | 163 | |
b34a8030 AS |
164 | |
165 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 166 | return -EINVAL; |
b34a8030 AS |
167 | |
168 | button = acpi_driver_data(device); | |
169 | ||
170 | switch (button->type) { | |
171 | case ACPI_BUTTON_TYPE_POWER: | |
172 | case ACPI_BUTTON_TYPE_POWERF: | |
173 | if (!acpi_power_dir) | |
4be44fcd LB |
174 | acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER, |
175 | acpi_button_dir); | |
b34a8030 AS |
176 | entry = acpi_power_dir; |
177 | break; | |
178 | case ACPI_BUTTON_TYPE_SLEEP: | |
179 | case ACPI_BUTTON_TYPE_SLEEPF: | |
180 | if (!acpi_sleep_dir) | |
4be44fcd LB |
181 | acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP, |
182 | acpi_button_dir); | |
b34a8030 AS |
183 | entry = acpi_sleep_dir; |
184 | break; | |
185 | case ACPI_BUTTON_TYPE_LID: | |
186 | if (!acpi_lid_dir) | |
4be44fcd LB |
187 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, |
188 | acpi_button_dir); | |
b34a8030 AS |
189 | entry = acpi_lid_dir; |
190 | break; | |
191 | } | |
192 | ||
193 | if (!entry) | |
d550d98d | 194 | return -ENODEV; |
b34a8030 AS |
195 | entry->owner = THIS_MODULE; |
196 | ||
197 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry); | |
198 | if (!acpi_device_dir(device)) | |
d550d98d | 199 | return -ENODEV; |
b34a8030 AS |
200 | acpi_device_dir(device)->owner = THIS_MODULE; |
201 | ||
202 | /* 'info' [R] */ | |
203 | entry = create_proc_entry(ACPI_BUTTON_FILE_INFO, | |
4be44fcd | 204 | S_IRUGO, acpi_device_dir(device)); |
b34a8030 | 205 | if (!entry) |
d550d98d | 206 | return -ENODEV; |
b34a8030 AS |
207 | else { |
208 | entry->proc_fops = &acpi_button_info_fops; | |
209 | entry->data = acpi_driver_data(device); | |
210 | entry->owner = THIS_MODULE; | |
211 | } | |
212 | ||
213 | /* show lid state [R] */ | |
214 | if (button->type == ACPI_BUTTON_TYPE_LID) { | |
215 | entry = create_proc_entry(ACPI_BUTTON_FILE_STATE, | |
4be44fcd | 216 | S_IRUGO, acpi_device_dir(device)); |
b34a8030 | 217 | if (!entry) |
a6fc6720 | 218 | return -ENODEV; |
b34a8030 AS |
219 | else { |
220 | entry->proc_fops = &acpi_button_state_fops; | |
221 | entry->data = acpi_driver_data(device); | |
222 | entry->owner = THIS_MODULE; | |
223 | } | |
224 | } | |
225 | ||
d550d98d | 226 | return 0; |
b34a8030 AS |
227 | } |
228 | ||
4be44fcd | 229 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 230 | { |
4be44fcd | 231 | struct acpi_button *button = NULL; |
b34a8030 | 232 | |
b34a8030 AS |
233 | |
234 | button = acpi_driver_data(device); | |
235 | if (acpi_device_dir(device)) { | |
236 | if (button->type == ACPI_BUTTON_TYPE_LID) | |
237 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, | |
4be44fcd | 238 | acpi_device_dir(device)); |
b34a8030 | 239 | remove_proc_entry(ACPI_BUTTON_FILE_INFO, |
4be44fcd | 240 | acpi_device_dir(device)); |
b34a8030 AS |
241 | |
242 | remove_proc_entry(acpi_device_bid(device), | |
4be44fcd | 243 | acpi_device_dir(device)->parent); |
b34a8030 AS |
244 | acpi_device_dir(device) = NULL; |
245 | } | |
246 | ||
d550d98d | 247 | return 0; |
b34a8030 AS |
248 | } |
249 | ||
1da177e4 LT |
250 | /* -------------------------------------------------------------------------- |
251 | Driver Interface | |
252 | -------------------------------------------------------------------------- */ | |
253 | ||
4be44fcd | 254 | static void acpi_button_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 255 | { |
4be44fcd | 256 | struct acpi_button *button = (struct acpi_button *)data; |
1da177e4 | 257 | |
1da177e4 LT |
258 | |
259 | if (!button || !button->device) | |
d550d98d | 260 | return; |
1da177e4 LT |
261 | |
262 | switch (event) { | |
263 | case ACPI_BUTTON_NOTIFY_STATUS: | |
4be44fcd LB |
264 | acpi_bus_generate_event(button->device, event, |
265 | ++button->pushed); | |
1da177e4 LT |
266 | break; |
267 | default: | |
268 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 269 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
270 | break; |
271 | } | |
272 | ||
d550d98d | 273 | return; |
1da177e4 LT |
274 | } |
275 | ||
4be44fcd | 276 | static acpi_status acpi_button_notify_fixed(void *data) |
1da177e4 | 277 | { |
4be44fcd LB |
278 | struct acpi_button *button = (struct acpi_button *)data; |
279 | ||
1da177e4 | 280 | |
b34a8030 | 281 | if (!button) |
d550d98d | 282 | return AE_BAD_PARAMETER; |
1da177e4 | 283 | |
27b1d3e8 | 284 | acpi_button_notify(button->device->handle, ACPI_BUTTON_NOTIFY_STATUS, button); |
1da177e4 | 285 | |
d550d98d | 286 | return AE_OK; |
1da177e4 LT |
287 | } |
288 | ||
4be44fcd | 289 | static int acpi_button_add(struct acpi_device *device) |
1da177e4 | 290 | { |
4be44fcd LB |
291 | int result = 0; |
292 | acpi_status status = AE_OK; | |
293 | struct acpi_button *button = NULL; | |
1da177e4 | 294 | |
1da177e4 LT |
295 | |
296 | if (!device) | |
d550d98d | 297 | return -EINVAL; |
1da177e4 LT |
298 | |
299 | button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL); | |
300 | if (!button) | |
d550d98d | 301 | return -ENOMEM; |
1da177e4 LT |
302 | memset(button, 0, sizeof(struct acpi_button)); |
303 | ||
304 | button->device = device; | |
1da177e4 LT |
305 | acpi_driver_data(device) = button; |
306 | ||
307 | /* | |
308 | * Determine the button type (via hid), as fixed-feature buttons | |
309 | * need to be handled a bit differently than generic-space. | |
310 | */ | |
311 | if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) { | |
312 | button->type = ACPI_BUTTON_TYPE_POWER; | |
4be44fcd LB |
313 | strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER); |
314 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 315 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
4be44fcd | 316 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) { |
1da177e4 LT |
317 | button->type = ACPI_BUTTON_TYPE_POWERF; |
318 | strcpy(acpi_device_name(device), | |
4be44fcd LB |
319 | ACPI_BUTTON_DEVICE_NAME_POWERF); |
320 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 321 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
4be44fcd | 322 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) { |
1da177e4 | 323 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
4be44fcd LB |
324 | strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP); |
325 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 326 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
4be44fcd | 327 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) { |
1da177e4 LT |
328 | button->type = ACPI_BUTTON_TYPE_SLEEPF; |
329 | strcpy(acpi_device_name(device), | |
4be44fcd LB |
330 | ACPI_BUTTON_DEVICE_NAME_SLEEPF); |
331 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 332 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
4be44fcd | 333 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) { |
1da177e4 | 334 | button->type = ACPI_BUTTON_TYPE_LID; |
4be44fcd LB |
335 | strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID); |
336 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 337 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
4be44fcd | 338 | } else { |
6468463a LB |
339 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", |
340 | acpi_device_hid(device)); | |
1da177e4 LT |
341 | result = -ENODEV; |
342 | goto end; | |
343 | } | |
344 | ||
b34a8030 AS |
345 | result = acpi_button_add_fs(device); |
346 | if (result) | |
347 | goto end; | |
348 | ||
1da177e4 LT |
349 | switch (button->type) { |
350 | case ACPI_BUTTON_TYPE_POWERF: | |
4be44fcd LB |
351 | status = |
352 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
353 | acpi_button_notify_fixed, | |
354 | button); | |
1da177e4 LT |
355 | break; |
356 | case ACPI_BUTTON_TYPE_SLEEPF: | |
4be44fcd LB |
357 | status = |
358 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
359 | acpi_button_notify_fixed, | |
360 | button); | |
1da177e4 LT |
361 | break; |
362 | default: | |
27b1d3e8 | 363 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
364 | ACPI_DEVICE_NOTIFY, |
365 | acpi_button_notify, | |
366 | button); | |
1da177e4 LT |
367 | break; |
368 | } | |
369 | ||
370 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
371 | result = -ENODEV; |
372 | goto end; | |
373 | } | |
374 | ||
375 | if (device->wakeup.flags.valid) { | |
376 | /* Button's GPE is run-wake GPE */ | |
4be44fcd LB |
377 | acpi_set_gpe_type(device->wakeup.gpe_device, |
378 | device->wakeup.gpe_number, | |
379 | ACPI_GPE_TYPE_WAKE_RUN); | |
380 | acpi_enable_gpe(device->wakeup.gpe_device, | |
381 | device->wakeup.gpe_number, ACPI_NOT_ISR); | |
1da177e4 LT |
382 | device->wakeup.state.enabled = 1; |
383 | } | |
384 | ||
4be44fcd LB |
385 | printk(KERN_INFO PREFIX "%s [%s]\n", |
386 | acpi_device_name(device), acpi_device_bid(device)); | |
1da177e4 | 387 | |
4be44fcd | 388 | end: |
1da177e4 | 389 | if (result) { |
b34a8030 | 390 | acpi_button_remove_fs(device); |
1da177e4 LT |
391 | kfree(button); |
392 | } | |
393 | ||
d550d98d | 394 | return result; |
1da177e4 LT |
395 | } |
396 | ||
4be44fcd | 397 | static int acpi_button_remove(struct acpi_device *device, int type) |
1da177e4 | 398 | { |
4be44fcd LB |
399 | acpi_status status = 0; |
400 | struct acpi_button *button = NULL; | |
1da177e4 | 401 | |
1da177e4 LT |
402 | |
403 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 404 | return -EINVAL; |
1da177e4 LT |
405 | |
406 | button = acpi_driver_data(device); | |
407 | ||
408 | /* Unregister for device notifications. */ | |
409 | switch (button->type) { | |
410 | case ACPI_BUTTON_TYPE_POWERF: | |
4be44fcd LB |
411 | status = |
412 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
413 | acpi_button_notify_fixed); | |
1da177e4 LT |
414 | break; |
415 | case ACPI_BUTTON_TYPE_SLEEPF: | |
4be44fcd LB |
416 | status = |
417 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
418 | acpi_button_notify_fixed); | |
1da177e4 LT |
419 | break; |
420 | default: | |
27b1d3e8 | 421 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
422 | ACPI_DEVICE_NOTIFY, |
423 | acpi_button_notify); | |
1da177e4 LT |
424 | break; |
425 | } | |
426 | ||
4be44fcd | 427 | acpi_button_remove_fs(device); |
b34a8030 | 428 | |
1da177e4 LT |
429 | kfree(button); |
430 | ||
d550d98d | 431 | return 0; |
1da177e4 LT |
432 | } |
433 | ||
4be44fcd | 434 | static int __init acpi_button_init(void) |
1da177e4 | 435 | { |
4be44fcd | 436 | int result = 0; |
1da177e4 | 437 | |
1da177e4 | 438 | |
b34a8030 AS |
439 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); |
440 | if (!acpi_button_dir) | |
d550d98d | 441 | return -ENODEV; |
b34a8030 | 442 | acpi_button_dir->owner = THIS_MODULE; |
1da177e4 LT |
443 | result = acpi_bus_register_driver(&acpi_button_driver); |
444 | if (result < 0) { | |
b34a8030 | 445 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
d550d98d | 446 | return -ENODEV; |
1da177e4 LT |
447 | } |
448 | ||
d550d98d | 449 | return 0; |
1da177e4 LT |
450 | } |
451 | ||
4be44fcd | 452 | static void __exit acpi_button_exit(void) |
1da177e4 | 453 | { |
1da177e4 LT |
454 | |
455 | acpi_bus_unregister_driver(&acpi_button_driver); | |
456 | ||
4be44fcd | 457 | if (acpi_power_dir) |
b34a8030 AS |
458 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir); |
459 | if (acpi_sleep_dir) | |
460 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir); | |
461 | if (acpi_lid_dir) | |
462 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
463 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
464 | ||
d550d98d | 465 | return; |
1da177e4 LT |
466 | } |
467 | ||
1da177e4 LT |
468 | module_init(acpi_button_init); |
469 | module_exit(acpi_button_exit); |