Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
50a4da89 | 2 | * button.c - ACPI Button Driver |
1da177e4 LT |
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> | |
c0968f0e | 32 | #include <linux/input.h> |
1da177e4 LT |
33 | #include <acpi/acpi_bus.h> |
34 | #include <acpi/acpi_drivers.h> | |
35 | ||
a192a958 LB |
36 | #define PREFIX "ACPI: " |
37 | ||
1da177e4 | 38 | #define ACPI_BUTTON_CLASS "button" |
b34a8030 AS |
39 | #define ACPI_BUTTON_FILE_INFO "info" |
40 | #define ACPI_BUTTON_FILE_STATE "state" | |
41 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
42 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
43 | ||
44 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
4be44fcd | 45 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
d68b597c | 46 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
1da177e4 | 47 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
1da177e4 LT |
48 | |
49 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
50 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
d68b597c | 51 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
1da177e4 | 52 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
1da177e4 LT |
53 | |
54 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
55 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
56 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
57 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
58 | ||
59 | #define _COMPONENT ACPI_BUTTON_COMPONENT | |
f52fd66d | 60 | ACPI_MODULE_NAME("button"); |
1da177e4 | 61 | |
c0968f0e | 62 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 63 | MODULE_DESCRIPTION("ACPI Button Driver"); |
1da177e4 LT |
64 | MODULE_LICENSE("GPL"); |
65 | ||
1ba90e3a TR |
66 | static const struct acpi_device_id button_device_ids[] = { |
67 | {ACPI_BUTTON_HID_LID, 0}, | |
68 | {ACPI_BUTTON_HID_SLEEP, 0}, | |
69 | {ACPI_BUTTON_HID_SLEEPF, 0}, | |
70 | {ACPI_BUTTON_HID_POWER, 0}, | |
71 | {ACPI_BUTTON_HID_POWERF, 0}, | |
72 | {"", 0}, | |
73 | }; | |
74 | MODULE_DEVICE_TABLE(acpi, button_device_ids); | |
75 | ||
4be44fcd LB |
76 | static int acpi_button_add(struct acpi_device *device); |
77 | static int acpi_button_remove(struct acpi_device *device, int type); | |
23de5d9e | 78 | static int acpi_button_resume(struct acpi_device *device); |
373cfc36 | 79 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
b34a8030 AS |
80 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file); |
81 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file); | |
1da177e4 LT |
82 | |
83 | static struct acpi_driver acpi_button_driver = { | |
c2b6705b | 84 | .name = "button", |
4be44fcd | 85 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 86 | .ids = button_device_ids, |
4be44fcd LB |
87 | .ops = { |
88 | .add = acpi_button_add, | |
23de5d9e | 89 | .resume = acpi_button_resume, |
4be44fcd | 90 | .remove = acpi_button_remove, |
373cfc36 | 91 | .notify = acpi_button_notify, |
c0968f0e | 92 | }, |
1da177e4 LT |
93 | }; |
94 | ||
95 | struct acpi_button { | |
c0968f0e DT |
96 | unsigned int type; |
97 | struct input_dev *input; | |
98 | char phys[32]; /* for input device */ | |
4be44fcd | 99 | unsigned long pushed; |
1da177e4 LT |
100 | }; |
101 | ||
d7508032 | 102 | static const struct file_operations acpi_button_info_fops = { |
cf7acfab | 103 | .owner = THIS_MODULE, |
4be44fcd LB |
104 | .open = acpi_button_info_open_fs, |
105 | .read = seq_read, | |
106 | .llseek = seq_lseek, | |
107 | .release = single_release, | |
b34a8030 AS |
108 | }; |
109 | ||
d7508032 | 110 | static const struct file_operations acpi_button_state_fops = { |
cf7acfab | 111 | .owner = THIS_MODULE, |
4be44fcd LB |
112 | .open = acpi_button_state_open_fs, |
113 | .read = seq_read, | |
114 | .llseek = seq_lseek, | |
115 | .release = single_release, | |
b34a8030 | 116 | }; |
4be44fcd | 117 | |
7e12715e JB |
118 | static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier); |
119 | static struct acpi_device *lid_device; | |
120 | ||
b34a8030 AS |
121 | /* -------------------------------------------------------------------------- |
122 | FS Interface (/proc) | |
123 | -------------------------------------------------------------------------- */ | |
124 | ||
4be44fcd | 125 | static struct proc_dir_entry *acpi_button_dir; |
b34a8030 AS |
126 | |
127 | static int acpi_button_info_seq_show(struct seq_file *seq, void *offset) | |
128 | { | |
106c19e7 | 129 | struct acpi_device *device = seq->private; |
b34a8030 | 130 | |
4be44fcd | 131 | seq_printf(seq, "type: %s\n", |
106c19e7 | 132 | acpi_device_name(device)); |
d550d98d | 133 | return 0; |
b34a8030 AS |
134 | } |
135 | ||
136 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file) | |
137 | { | |
138 | return single_open(file, acpi_button_info_seq_show, PDE(inode)->data); | |
139 | } | |
4be44fcd | 140 | |
b34a8030 AS |
141 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
142 | { | |
106c19e7 | 143 | struct acpi_device *device = seq->private; |
4be44fcd | 144 | acpi_status status; |
27663c58 | 145 | unsigned long long state; |
b34a8030 | 146 | |
106c19e7 | 147 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state); |
c0968f0e DT |
148 | seq_printf(seq, "state: %s\n", |
149 | ACPI_FAILURE(status) ? "unsupported" : | |
150 | (state ? "open" : "closed")); | |
d550d98d | 151 | return 0; |
b34a8030 AS |
152 | } |
153 | ||
154 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file) | |
155 | { | |
156 | return single_open(file, acpi_button_state_seq_show, PDE(inode)->data); | |
157 | } | |
158 | ||
159 | static struct proc_dir_entry *acpi_power_dir; | |
160 | static struct proc_dir_entry *acpi_sleep_dir; | |
161 | static struct proc_dir_entry *acpi_lid_dir; | |
162 | ||
4be44fcd | 163 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 164 | { |
1bce8113 | 165 | struct acpi_button *button = acpi_driver_data(device); |
4be44fcd | 166 | struct proc_dir_entry *entry = NULL; |
b34a8030 AS |
167 | |
168 | switch (button->type) { | |
169 | case ACPI_BUTTON_TYPE_POWER: | |
b34a8030 | 170 | if (!acpi_power_dir) |
4be44fcd LB |
171 | acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER, |
172 | acpi_button_dir); | |
b34a8030 AS |
173 | entry = acpi_power_dir; |
174 | break; | |
175 | case ACPI_BUTTON_TYPE_SLEEP: | |
b34a8030 | 176 | if (!acpi_sleep_dir) |
4be44fcd LB |
177 | acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP, |
178 | acpi_button_dir); | |
b34a8030 AS |
179 | entry = acpi_sleep_dir; |
180 | break; | |
181 | case ACPI_BUTTON_TYPE_LID: | |
182 | if (!acpi_lid_dir) | |
4be44fcd LB |
183 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, |
184 | acpi_button_dir); | |
b34a8030 AS |
185 | entry = acpi_lid_dir; |
186 | break; | |
187 | } | |
188 | ||
189 | if (!entry) | |
d550d98d | 190 | return -ENODEV; |
b34a8030 AS |
191 | |
192 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry); | |
193 | if (!acpi_device_dir(device)) | |
d550d98d | 194 | return -ENODEV; |
b34a8030 AS |
195 | |
196 | /* 'info' [R] */ | |
cf7acfab DL |
197 | entry = proc_create_data(ACPI_BUTTON_FILE_INFO, |
198 | S_IRUGO, acpi_device_dir(device), | |
106c19e7 | 199 | &acpi_button_info_fops, device); |
b34a8030 | 200 | if (!entry) |
d550d98d | 201 | return -ENODEV; |
b34a8030 AS |
202 | |
203 | /* show lid state [R] */ | |
204 | if (button->type == ACPI_BUTTON_TYPE_LID) { | |
cf7acfab DL |
205 | entry = proc_create_data(ACPI_BUTTON_FILE_STATE, |
206 | S_IRUGO, acpi_device_dir(device), | |
106c19e7 | 207 | &acpi_button_state_fops, device); |
b34a8030 | 208 | if (!entry) |
a6fc6720 | 209 | return -ENODEV; |
b34a8030 AS |
210 | } |
211 | ||
d550d98d | 212 | return 0; |
b34a8030 AS |
213 | } |
214 | ||
4be44fcd | 215 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 216 | { |
c0968f0e | 217 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 218 | |
b34a8030 AS |
219 | if (acpi_device_dir(device)) { |
220 | if (button->type == ACPI_BUTTON_TYPE_LID) | |
221 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, | |
4be44fcd | 222 | acpi_device_dir(device)); |
b34a8030 | 223 | remove_proc_entry(ACPI_BUTTON_FILE_INFO, |
4be44fcd | 224 | acpi_device_dir(device)); |
b34a8030 AS |
225 | |
226 | remove_proc_entry(acpi_device_bid(device), | |
4be44fcd | 227 | acpi_device_dir(device)->parent); |
b34a8030 AS |
228 | acpi_device_dir(device) = NULL; |
229 | } | |
230 | ||
d550d98d | 231 | return 0; |
b34a8030 AS |
232 | } |
233 | ||
1da177e4 LT |
234 | /* -------------------------------------------------------------------------- |
235 | Driver Interface | |
236 | -------------------------------------------------------------------------- */ | |
7e12715e JB |
237 | int acpi_lid_notifier_register(struct notifier_block *nb) |
238 | { | |
239 | return blocking_notifier_chain_register(&acpi_lid_notifier, nb); | |
240 | } | |
241 | EXPORT_SYMBOL(acpi_lid_notifier_register); | |
242 | ||
243 | int acpi_lid_notifier_unregister(struct notifier_block *nb) | |
244 | { | |
245 | return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb); | |
246 | } | |
247 | EXPORT_SYMBOL(acpi_lid_notifier_unregister); | |
248 | ||
249 | int acpi_lid_open(void) | |
250 | { | |
251 | acpi_status status; | |
252 | unsigned long long state; | |
253 | ||
254 | status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL, | |
255 | &state); | |
256 | if (ACPI_FAILURE(status)) | |
257 | return -ENODEV; | |
258 | ||
259 | return !!state; | |
260 | } | |
261 | EXPORT_SYMBOL(acpi_lid_open); | |
262 | ||
106c19e7 | 263 | static int acpi_lid_send_state(struct acpi_device *device) |
23de5d9e | 264 | { |
106c19e7 | 265 | struct acpi_button *button = acpi_driver_data(device); |
27663c58 | 266 | unsigned long long state; |
23de5d9e | 267 | acpi_status status; |
7e12715e | 268 | int ret; |
23de5d9e | 269 | |
106c19e7 | 270 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state); |
23de5d9e AS |
271 | if (ACPI_FAILURE(status)) |
272 | return -ENODEV; | |
50a4da89 | 273 | |
23de5d9e AS |
274 | /* input layer checks if event is redundant */ |
275 | input_report_switch(button->input, SW_LID, !state); | |
df316e93 | 276 | input_sync(button->input); |
7e12715e JB |
277 | |
278 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device); | |
279 | if (ret == NOTIFY_DONE) | |
280 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, | |
281 | device); | |
282 | return ret; | |
23de5d9e | 283 | } |
1da177e4 | 284 | |
373cfc36 | 285 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
1da177e4 | 286 | { |
373cfc36 | 287 | struct acpi_button *button = acpi_driver_data(device); |
c0968f0e | 288 | struct input_dev *input; |
1da177e4 | 289 | |
1da177e4 | 290 | switch (event) { |
373cfc36 BH |
291 | case ACPI_FIXED_HARDWARE_EVENT: |
292 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
293 | /* fall through */ | |
1da177e4 | 294 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 295 | input = button->input; |
c0968f0e | 296 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
106c19e7 | 297 | acpi_lid_send_state(device); |
c0968f0e DT |
298 | } else { |
299 | int keycode = test_bit(KEY_SLEEP, input->keybit) ? | |
300 | KEY_SLEEP : KEY_POWER; | |
301 | ||
302 | input_report_key(input, keycode, 1); | |
303 | input_sync(input); | |
304 | input_report_key(input, keycode, 0); | |
df316e93 | 305 | input_sync(input); |
c0968f0e | 306 | } |
c0968f0e | 307 | |
106c19e7 | 308 | acpi_bus_generate_proc_event(device, event, ++button->pushed); |
1da177e4 LT |
309 | break; |
310 | default: | |
311 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 312 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
313 | break; |
314 | } | |
1da177e4 LT |
315 | } |
316 | ||
23de5d9e AS |
317 | static int acpi_button_resume(struct acpi_device *device) |
318 | { | |
1bce8113 | 319 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 320 | |
e2fb9754 | 321 | if (button->type == ACPI_BUTTON_TYPE_LID) |
106c19e7 | 322 | return acpi_lid_send_state(device); |
23de5d9e AS |
323 | return 0; |
324 | } | |
325 | ||
c0968f0e DT |
326 | static int acpi_button_add(struct acpi_device *device) |
327 | { | |
c0968f0e DT |
328 | struct acpi_button *button; |
329 | struct input_dev *input; | |
bf04a772 | 330 | char *hid, *name, *class; |
1bce8113 | 331 | int error; |
1da177e4 | 332 | |
c0968f0e | 333 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 334 | if (!button) |
d550d98d | 335 | return -ENOMEM; |
1da177e4 | 336 | |
db89b4f0 | 337 | device->driver_data = button; |
1da177e4 | 338 | |
c0968f0e DT |
339 | button->input = input = input_allocate_device(); |
340 | if (!input) { | |
341 | error = -ENOMEM; | |
342 | goto err_free_button; | |
343 | } | |
344 | ||
bf04a772 BH |
345 | hid = acpi_device_hid(device); |
346 | name = acpi_device_name(device); | |
347 | class = acpi_device_class(device); | |
348 | ||
d68b597c BH |
349 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
350 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 351 | button->type = ACPI_BUTTON_TYPE_POWER; |
bf04a772 BH |
352 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
353 | sprintf(class, "%s/%s", | |
1da177e4 | 354 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
355 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
356 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 357 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
bf04a772 BH |
358 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
359 | sprintf(class, "%s/%s", | |
1da177e4 | 360 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 361 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 362 | button->type = ACPI_BUTTON_TYPE_LID; |
bf04a772 BH |
363 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
364 | sprintf(class, "%s/%s", | |
1da177e4 | 365 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
4be44fcd | 366 | } else { |
bf04a772 | 367 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
c0968f0e DT |
368 | error = -ENODEV; |
369 | goto err_free_input; | |
1da177e4 LT |
370 | } |
371 | ||
c0968f0e DT |
372 | error = acpi_button_add_fs(device); |
373 | if (error) | |
374 | goto err_free_input; | |
375 | ||
bf04a772 | 376 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 377 | |
bf04a772 | 378 | input->name = name; |
c0968f0e DT |
379 | input->phys = button->phys; |
380 | input->id.bustype = BUS_HOST; | |
381 | input->id.product = button->type; | |
3b34e523 | 382 | input->dev.parent = &device->dev; |
b34a8030 | 383 | |
1da177e4 | 384 | switch (button->type) { |
c0968f0e | 385 | case ACPI_BUTTON_TYPE_POWER: |
7b19ada2 | 386 | input->evbit[0] = BIT_MASK(EV_KEY); |
c0968f0e | 387 | set_bit(KEY_POWER, input->keybit); |
1da177e4 | 388 | break; |
c0968f0e DT |
389 | |
390 | case ACPI_BUTTON_TYPE_SLEEP: | |
7b19ada2 | 391 | input->evbit[0] = BIT_MASK(EV_KEY); |
c0968f0e | 392 | set_bit(KEY_SLEEP, input->keybit); |
1da177e4 | 393 | break; |
c0968f0e DT |
394 | |
395 | case ACPI_BUTTON_TYPE_LID: | |
7b19ada2 | 396 | input->evbit[0] = BIT_MASK(EV_SW); |
c0968f0e | 397 | set_bit(SW_LID, input->swbit); |
1da177e4 LT |
398 | break; |
399 | } | |
400 | ||
c0968f0e DT |
401 | error = input_register_device(input); |
402 | if (error) | |
373cfc36 | 403 | goto err_remove_fs; |
7e12715e | 404 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
106c19e7 | 405 | acpi_lid_send_state(device); |
7e12715e JB |
406 | /* |
407 | * This assumes there's only one lid device, or if there are | |
408 | * more we only care about the last one... | |
409 | */ | |
410 | lid_device = device; | |
411 | } | |
1da177e4 LT |
412 | |
413 | if (device->wakeup.flags.valid) { | |
414 | /* Button's GPE is run-wake GPE */ | |
4be44fcd LB |
415 | acpi_set_gpe_type(device->wakeup.gpe_device, |
416 | device->wakeup.gpe_number, | |
417 | ACPI_GPE_TYPE_WAKE_RUN); | |
418 | acpi_enable_gpe(device->wakeup.gpe_device, | |
0b7084ac | 419 | device->wakeup.gpe_number); |
1da177e4 LT |
420 | device->wakeup.state.enabled = 1; |
421 | } | |
422 | ||
bf04a772 | 423 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 424 | return 0; |
1da177e4 | 425 | |
c0968f0e DT |
426 | err_remove_fs: |
427 | acpi_button_remove_fs(device); | |
428 | err_free_input: | |
429 | input_free_device(input); | |
430 | err_free_button: | |
431 | kfree(button); | |
432 | return error; | |
1da177e4 LT |
433 | } |
434 | ||
4be44fcd | 435 | static int acpi_button_remove(struct acpi_device *device, int type) |
1da177e4 | 436 | { |
1bce8113 | 437 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 438 | |
4be44fcd | 439 | acpi_button_remove_fs(device); |
c0968f0e | 440 | input_unregister_device(button->input); |
1da177e4 | 441 | kfree(button); |
d550d98d | 442 | return 0; |
1da177e4 LT |
443 | } |
444 | ||
4be44fcd | 445 | static int __init acpi_button_init(void) |
1da177e4 | 446 | { |
c0968f0e | 447 | int result; |
1da177e4 | 448 | |
b34a8030 AS |
449 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); |
450 | if (!acpi_button_dir) | |
d550d98d | 451 | return -ENODEV; |
50a4da89 | 452 | |
1da177e4 LT |
453 | result = acpi_bus_register_driver(&acpi_button_driver); |
454 | if (result < 0) { | |
b34a8030 | 455 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
d550d98d | 456 | return -ENODEV; |
1da177e4 LT |
457 | } |
458 | ||
d550d98d | 459 | return 0; |
1da177e4 LT |
460 | } |
461 | ||
4be44fcd | 462 | static void __exit acpi_button_exit(void) |
1da177e4 | 463 | { |
1da177e4 LT |
464 | acpi_bus_unregister_driver(&acpi_button_driver); |
465 | ||
4be44fcd | 466 | if (acpi_power_dir) |
b34a8030 AS |
467 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir); |
468 | if (acpi_sleep_dir) | |
469 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir); | |
470 | if (acpi_lid_dir) | |
471 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
472 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
1da177e4 LT |
473 | } |
474 | ||
1da177e4 LT |
475 | module_init(acpi_button_init); |
476 | module_exit(acpi_button_exit); |