Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/proc_fs.h> |
2 | #include <linux/seq_file.h> | |
3 | #include <linux/suspend.h> | |
4 | #include <linux/bcd.h> | |
5 | #include <asm/uaccess.h> | |
6 | ||
7 | #include <acpi/acpi_bus.h> | |
8 | #include <acpi/acpi_drivers.h> | |
9 | ||
10 | #ifdef CONFIG_X86 | |
11 | #include <linux/mc146818rtc.h> | |
12 | #endif | |
13 | ||
14 | #include "sleep.h" | |
15 | ||
1da177e4 | 16 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
43532c8a LB |
17 | |
18 | /* | |
19 | * this file provides support for: | |
20 | * /proc/acpi/sleep | |
21 | * /proc/acpi/alarm | |
22 | * /proc/acpi/wakeup | |
23 | */ | |
24 | ||
4be44fcd | 25 | ACPI_MODULE_NAME("sleep") |
134c2171 | 26 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 LT |
27 | static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset) |
28 | { | |
4be44fcd | 29 | int i; |
1da177e4 | 30 | |
1da177e4 LT |
31 | for (i = 0; i <= ACPI_STATE_S5; i++) { |
32 | if (sleep_states[i]) { | |
4be44fcd | 33 | seq_printf(seq, "S%d ", i); |
1da177e4 LT |
34 | } |
35 | } | |
36 | ||
37 | seq_puts(seq, "\n"); | |
38 | ||
39 | return 0; | |
40 | } | |
41 | ||
42 | static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file) | |
43 | { | |
44 | return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data); | |
45 | } | |
46 | ||
47 | static ssize_t | |
4be44fcd LB |
48 | acpi_system_write_sleep(struct file *file, |
49 | const char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 50 | { |
4be44fcd LB |
51 | char str[12]; |
52 | u32 state = 0; | |
53 | int error = 0; | |
1da177e4 LT |
54 | |
55 | if (count > sizeof(str) - 1) | |
56 | goto Done; | |
4be44fcd | 57 | memset(str, 0, sizeof(str)); |
1da177e4 LT |
58 | if (copy_from_user(str, buffer, count)) |
59 | return -EFAULT; | |
60 | ||
61 | /* Check for S4 bios request */ | |
4be44fcd | 62 | if (!strcmp(str, "4b")) { |
1da177e4 LT |
63 | error = acpi_suspend(4); |
64 | goto Done; | |
65 | } | |
66 | state = simple_strtoul(str, NULL, 0); | |
b0cb1a19 | 67 | #ifdef CONFIG_HIBERNATION |
1da177e4 | 68 | if (state == 4) { |
a3d25c27 | 69 | error = hibernate(); |
1da177e4 LT |
70 | goto Done; |
71 | } | |
72 | #endif | |
73 | error = acpi_suspend(state); | |
4be44fcd | 74 | Done: |
1da177e4 LT |
75 | return error ? error : count; |
76 | } | |
134c2171 | 77 | #endif /* CONFIG_ACPI_PROCFS */ |
1da177e4 | 78 | |
673d5b43 | 79 | #if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE) || !defined(CONFIG_X86) |
f5f72b46 DB |
80 | /* use /sys/class/rtc/rtcX/wakealarm instead; it's not ACPI-specific */ |
81 | #else | |
82 | #define HAVE_ACPI_LEGACY_ALARM | |
83 | #endif | |
84 | ||
85 | #ifdef HAVE_ACPI_LEGACY_ALARM | |
86 | ||
2602a671 LB |
87 | static u32 cmos_bcd_read(int offset, int rtc_control); |
88 | ||
1da177e4 LT |
89 | static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset) |
90 | { | |
4be44fcd | 91 | u32 sec, min, hr; |
ad71860a | 92 | u32 day, mo, yr, cent = 0; |
48452e5f | 93 | u32 today = 0; |
4be44fcd LB |
94 | unsigned char rtc_control = 0; |
95 | unsigned long flags; | |
1da177e4 | 96 | |
1da177e4 LT |
97 | spin_lock_irqsave(&rtc_lock, flags); |
98 | ||
1da177e4 | 99 | rtc_control = CMOS_READ(RTC_CONTROL); |
48452e5f ML |
100 | sec = cmos_bcd_read(RTC_SECONDS_ALARM, rtc_control); |
101 | min = cmos_bcd_read(RTC_MINUTES_ALARM, rtc_control); | |
102 | hr = cmos_bcd_read(RTC_HOURS_ALARM, rtc_control); | |
1da177e4 LT |
103 | |
104 | /* If we ever get an FACP with proper values... */ | |
48452e5f | 105 | if (acpi_gbl_FADT.day_alarm) { |
1da177e4 | 106 | /* ACPI spec: only low 6 its should be cared */ |
ad71860a | 107 | day = CMOS_READ(acpi_gbl_FADT.day_alarm) & 0x3F; |
48452e5f ML |
108 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) |
109 | day = bcd2bin(day); | |
110 | } else | |
111 | day = cmos_bcd_read(RTC_DAY_OF_MONTH, rtc_control); | |
ad71860a | 112 | if (acpi_gbl_FADT.month_alarm) |
48452e5f ML |
113 | mo = cmos_bcd_read(acpi_gbl_FADT.month_alarm, rtc_control); |
114 | else { | |
115 | mo = cmos_bcd_read(RTC_MONTH, rtc_control); | |
116 | today = cmos_bcd_read(RTC_DAY_OF_MONTH, rtc_control); | |
117 | } | |
ad71860a | 118 | if (acpi_gbl_FADT.century) |
48452e5f | 119 | cent = cmos_bcd_read(acpi_gbl_FADT.century, rtc_control); |
ad71860a | 120 | |
48452e5f | 121 | yr = cmos_bcd_read(RTC_YEAR, rtc_control); |
1da177e4 LT |
122 | |
123 | spin_unlock_irqrestore(&rtc_lock, flags); | |
124 | ||
4be44fcd | 125 | /* we're trusting the FADT (see above) */ |
ad71860a | 126 | if (!acpi_gbl_FADT.century) |
4be44fcd LB |
127 | /* If we're not trusting the FADT, we should at least make it |
128 | * right for _this_ century... ehm, what is _this_ century? | |
129 | * | |
130 | * TBD: | |
131 | * ASAP: find piece of code in the kernel, e.g. star tracker driver, | |
132 | * which we can trust to determine the century correctly. Atom | |
133 | * watch driver would be nice, too... | |
134 | * | |
135 | * if that has not happened, change for first release in 2050: | |
136 | * if (yr<50) | |
137 | * yr += 2100; | |
138 | * else | |
139 | * yr += 2000; // current line of code | |
140 | * | |
141 | * if that has not happened either, please do on 2099/12/31:23:59:59 | |
142 | * s/2000/2100 | |
143 | * | |
144 | */ | |
1da177e4 | 145 | yr += 2000; |
ad71860a AS |
146 | else |
147 | yr += cent * 100; | |
1da177e4 | 148 | |
48452e5f ML |
149 | /* |
150 | * Show correct dates for alarms up to a month into the future. | |
151 | * This solves issues for nearly all situations with the common | |
152 | * 30-day alarm clocks in PC hardware. | |
153 | */ | |
154 | if (day < today) { | |
155 | if (mo < 12) { | |
156 | mo += 1; | |
157 | } else { | |
158 | mo = 1; | |
159 | yr += 1; | |
160 | } | |
161 | } | |
162 | ||
4be44fcd LB |
163 | seq_printf(seq, "%4.4u-", yr); |
164 | (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo); | |
165 | (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day); | |
166 | (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr); | |
167 | (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min); | |
1da177e4 LT |
168 | (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec); |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file) | |
174 | { | |
175 | return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data); | |
176 | } | |
177 | ||
4be44fcd | 178 | static int get_date_field(char **p, u32 * value) |
1da177e4 | 179 | { |
4be44fcd LB |
180 | char *next = NULL; |
181 | char *string_end = NULL; | |
182 | int result = -EINVAL; | |
1da177e4 LT |
183 | |
184 | /* | |
185 | * Try to find delimeter, only to insert null. The end of the | |
186 | * string won't have one, but is still valid. | |
187 | */ | |
975c3025 SYY |
188 | if (*p == NULL) |
189 | return result; | |
190 | ||
1da177e4 LT |
191 | next = strpbrk(*p, "- :"); |
192 | if (next) | |
193 | *next++ = '\0'; | |
194 | ||
195 | *value = simple_strtoul(*p, &string_end, 10); | |
196 | ||
197 | /* Signal success if we got a good digit */ | |
198 | if (string_end != *p) | |
199 | result = 0; | |
200 | ||
201 | if (next) | |
202 | *p = next; | |
975c3025 SYY |
203 | else |
204 | *p = NULL; | |
1da177e4 LT |
205 | |
206 | return result; | |
207 | } | |
208 | ||
c67c36e4 LT |
209 | /* Read a possibly BCD register, always return binary */ |
210 | static u32 cmos_bcd_read(int offset, int rtc_control) | |
211 | { | |
212 | u32 val = CMOS_READ(offset); | |
213 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) | |
ab527d75 | 214 | val = bcd2bin(val); |
c67c36e4 LT |
215 | return val; |
216 | } | |
217 | ||
218 | /* Write binary value into possibly BCD register */ | |
219 | static void cmos_bcd_write(u32 val, int offset, int rtc_control) | |
220 | { | |
221 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) | |
ab527d75 | 222 | val = bin2bcd(val); |
c67c36e4 LT |
223 | CMOS_WRITE(val, offset); |
224 | } | |
225 | ||
1da177e4 | 226 | static ssize_t |
4be44fcd LB |
227 | acpi_system_write_alarm(struct file *file, |
228 | const char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 229 | { |
4be44fcd LB |
230 | int result = 0; |
231 | char alarm_string[30] = { '\0' }; | |
232 | char *p = alarm_string; | |
233 | u32 sec, min, hr, day, mo, yr; | |
234 | int adjust = 0; | |
235 | unsigned char rtc_control = 0; | |
1da177e4 | 236 | |
1da177e4 | 237 | if (count > sizeof(alarm_string) - 1) |
95d9a7a8 | 238 | return -EINVAL; |
4be44fcd | 239 | |
1da177e4 | 240 | if (copy_from_user(alarm_string, buffer, count)) |
95d9a7a8 | 241 | return -EFAULT; |
1da177e4 LT |
242 | |
243 | alarm_string[count] = '\0'; | |
244 | ||
245 | /* check for time adjustment */ | |
246 | if (alarm_string[0] == '+') { | |
247 | p++; | |
248 | adjust = 1; | |
249 | } | |
250 | ||
251 | if ((result = get_date_field(&p, &yr))) | |
252 | goto end; | |
253 | if ((result = get_date_field(&p, &mo))) | |
254 | goto end; | |
255 | if ((result = get_date_field(&p, &day))) | |
256 | goto end; | |
257 | if ((result = get_date_field(&p, &hr))) | |
258 | goto end; | |
259 | if ((result = get_date_field(&p, &min))) | |
260 | goto end; | |
261 | if ((result = get_date_field(&p, &sec))) | |
262 | goto end; | |
263 | ||
1da177e4 LT |
264 | spin_lock_irq(&rtc_lock); |
265 | ||
266 | rtc_control = CMOS_READ(RTC_CONTROL); | |
1da177e4 LT |
267 | |
268 | if (adjust) { | |
c67c36e4 LT |
269 | yr += cmos_bcd_read(RTC_YEAR, rtc_control); |
270 | mo += cmos_bcd_read(RTC_MONTH, rtc_control); | |
271 | day += cmos_bcd_read(RTC_DAY_OF_MONTH, rtc_control); | |
272 | hr += cmos_bcd_read(RTC_HOURS, rtc_control); | |
273 | min += cmos_bcd_read(RTC_MINUTES, rtc_control); | |
274 | sec += cmos_bcd_read(RTC_SECONDS, rtc_control); | |
1da177e4 LT |
275 | } |
276 | ||
277 | spin_unlock_irq(&rtc_lock); | |
278 | ||
1da177e4 | 279 | if (sec > 59) { |
08798029 YY |
280 | min += sec/60; |
281 | sec = sec%60; | |
1da177e4 LT |
282 | } |
283 | if (min > 59) { | |
08798029 YY |
284 | hr += min/60; |
285 | min = min%60; | |
1da177e4 LT |
286 | } |
287 | if (hr > 23) { | |
08798029 YY |
288 | day += hr/24; |
289 | hr = hr%24; | |
1da177e4 LT |
290 | } |
291 | if (day > 31) { | |
08798029 YY |
292 | mo += day/32; |
293 | day = day%32; | |
1da177e4 LT |
294 | } |
295 | if (mo > 12) { | |
08798029 YY |
296 | yr += mo/13; |
297 | mo = mo%13; | |
1da177e4 | 298 | } |
1da177e4 LT |
299 | |
300 | spin_lock_irq(&rtc_lock); | |
301 | /* | |
302 | * Disable alarm interrupt before setting alarm timer or else | |
303 | * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs | |
304 | */ | |
305 | rtc_control &= ~RTC_AIE; | |
306 | CMOS_WRITE(rtc_control, RTC_CONTROL); | |
307 | CMOS_READ(RTC_INTR_FLAGS); | |
308 | ||
309 | /* write the fields the rtc knows about */ | |
c67c36e4 LT |
310 | cmos_bcd_write(hr, RTC_HOURS_ALARM, rtc_control); |
311 | cmos_bcd_write(min, RTC_MINUTES_ALARM, rtc_control); | |
312 | cmos_bcd_write(sec, RTC_SECONDS_ALARM, rtc_control); | |
1da177e4 LT |
313 | |
314 | /* | |
315 | * If the system supports an enhanced alarm it will have non-zero | |
316 | * offsets into the CMOS RAM here -- which for some reason are pointing | |
317 | * to the RTC area of memory. | |
318 | */ | |
ad71860a | 319 | if (acpi_gbl_FADT.day_alarm) |
c67c36e4 | 320 | cmos_bcd_write(day, acpi_gbl_FADT.day_alarm, rtc_control); |
ad71860a | 321 | if (acpi_gbl_FADT.month_alarm) |
c67c36e4 | 322 | cmos_bcd_write(mo, acpi_gbl_FADT.month_alarm, rtc_control); |
cce3ce89 HC |
323 | if (acpi_gbl_FADT.century) { |
324 | if (adjust) | |
325 | yr += cmos_bcd_read(acpi_gbl_FADT.century, rtc_control) * 100; | |
c67c36e4 | 326 | cmos_bcd_write(yr / 100, acpi_gbl_FADT.century, rtc_control); |
cce3ce89 | 327 | } |
1da177e4 LT |
328 | /* enable the rtc alarm interrupt */ |
329 | rtc_control |= RTC_AIE; | |
330 | CMOS_WRITE(rtc_control, RTC_CONTROL); | |
331 | CMOS_READ(RTC_INTR_FLAGS); | |
332 | ||
333 | spin_unlock_irq(&rtc_lock); | |
334 | ||
335 | acpi_clear_event(ACPI_EVENT_RTC); | |
336 | acpi_enable_event(ACPI_EVENT_RTC, 0); | |
337 | ||
338 | *ppos += count; | |
339 | ||
340 | result = 0; | |
4be44fcd | 341 | end: |
95d9a7a8 | 342 | return result ? result : count; |
1da177e4 | 343 | } |
fd350943 | 344 | #endif /* HAVE_ACPI_LEGACY_ALARM */ |
1da177e4 | 345 | |
1da177e4 LT |
346 | static int |
347 | acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) | |
348 | { | |
4be44fcd | 349 | struct list_head *node, *next; |
1da177e4 | 350 | |
8aa55591 | 351 | seq_printf(seq, "Device\tS-state\t Status Sysfs node\n"); |
1da177e4 | 352 | |
9090589d | 353 | mutex_lock(&acpi_device_lock); |
1da177e4 | 354 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { |
4be44fcd LB |
355 | struct acpi_device *dev = |
356 | container_of(node, struct acpi_device, wakeup_list); | |
8aa55591 | 357 | struct device *ldev; |
1da177e4 LT |
358 | |
359 | if (!dev->wakeup.flags.valid) | |
360 | continue; | |
8aa55591 DB |
361 | |
362 | ldev = acpi_get_physical_device(dev->handle); | |
363 | seq_printf(seq, "%s\t S%d\t%c%-8s ", | |
4be44fcd LB |
364 | dev->pnp.bus_id, |
365 | (u32) dev->wakeup.sleep_state, | |
8aa55591 | 366 | dev->wakeup.flags.run_wake ? '*' : ' ', |
c65ade4d | 367 | dev->wakeup.state.enabled ? "enabled" : "disabled"); |
8aa55591 DB |
368 | if (ldev) |
369 | seq_printf(seq, "%s:%s", | |
77fb61a0 | 370 | ldev->bus ? ldev->bus->name : "no-bus", |
0794469d | 371 | dev_name(ldev)); |
8aa55591 DB |
372 | seq_printf(seq, "\n"); |
373 | put_device(ldev); | |
374 | ||
1da177e4 | 375 | } |
9090589d | 376 | mutex_unlock(&acpi_device_lock); |
1da177e4 LT |
377 | return 0; |
378 | } | |
379 | ||
76acae04 RW |
380 | static void physical_device_enable_wakeup(struct acpi_device *adev) |
381 | { | |
382 | struct device *dev = acpi_get_physical_device(adev->handle); | |
383 | ||
384 | if (dev && device_can_wakeup(dev)) | |
385 | device_set_wakeup_enable(dev, adev->wakeup.state.enabled); | |
386 | } | |
387 | ||
1da177e4 | 388 | static ssize_t |
4be44fcd LB |
389 | acpi_system_write_wakeup_device(struct file *file, |
390 | const char __user * buffer, | |
391 | size_t count, loff_t * ppos) | |
1da177e4 | 392 | { |
4be44fcd LB |
393 | struct list_head *node, *next; |
394 | char strbuf[5]; | |
395 | char str[5] = ""; | |
52a2b11c | 396 | unsigned int len = count; |
1da177e4 LT |
397 | struct acpi_device *found_dev = NULL; |
398 | ||
4be44fcd LB |
399 | if (len > 4) |
400 | len = 4; | |
d9f65018 AV |
401 | if (len < 0) |
402 | return -EFAULT; | |
1da177e4 LT |
403 | |
404 | if (copy_from_user(strbuf, buffer, len)) | |
405 | return -EFAULT; | |
406 | strbuf[len] = '\0'; | |
407 | sscanf(strbuf, "%s", str); | |
408 | ||
9090589d | 409 | mutex_lock(&acpi_device_lock); |
1da177e4 | 410 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { |
4be44fcd LB |
411 | struct acpi_device *dev = |
412 | container_of(node, struct acpi_device, wakeup_list); | |
1da177e4 LT |
413 | if (!dev->wakeup.flags.valid) |
414 | continue; | |
415 | ||
416 | if (!strncmp(dev->pnp.bus_id, str, 4)) { | |
4be44fcd LB |
417 | dev->wakeup.state.enabled = |
418 | dev->wakeup.state.enabled ? 0 : 1; | |
1da177e4 LT |
419 | found_dev = dev; |
420 | break; | |
421 | } | |
422 | } | |
423 | if (found_dev) { | |
76acae04 | 424 | physical_device_enable_wakeup(found_dev); |
1da177e4 | 425 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { |
4be44fcd LB |
426 | struct acpi_device *dev = container_of(node, |
427 | struct | |
428 | acpi_device, | |
429 | wakeup_list); | |
1da177e4 LT |
430 | |
431 | if ((dev != found_dev) && | |
4be44fcd LB |
432 | (dev->wakeup.gpe_number == |
433 | found_dev->wakeup.gpe_number) | |
434 | && (dev->wakeup.gpe_device == | |
435 | found_dev->wakeup.gpe_device)) { | |
436 | printk(KERN_WARNING | |
437 | "ACPI: '%s' and '%s' have the same GPE, " | |
438 | "can't disable/enable one seperately\n", | |
439 | dev->pnp.bus_id, found_dev->pnp.bus_id); | |
440 | dev->wakeup.state.enabled = | |
441 | found_dev->wakeup.state.enabled; | |
76acae04 | 442 | physical_device_enable_wakeup(dev); |
1da177e4 LT |
443 | } |
444 | } | |
445 | } | |
9090589d | 446 | mutex_unlock(&acpi_device_lock); |
1da177e4 LT |
447 | return count; |
448 | } | |
449 | ||
450 | static int | |
451 | acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file) | |
452 | { | |
4be44fcd LB |
453 | return single_open(file, acpi_system_wakeup_device_seq_show, |
454 | PDE(inode)->data); | |
1da177e4 LT |
455 | } |
456 | ||
d7508032 | 457 | static const struct file_operations acpi_system_wakeup_device_fops = { |
cf7acfab | 458 | .owner = THIS_MODULE, |
4be44fcd LB |
459 | .open = acpi_system_wakeup_device_open_fs, |
460 | .read = seq_read, | |
461 | .write = acpi_system_write_wakeup_device, | |
462 | .llseek = seq_lseek, | |
463 | .release = single_release, | |
1da177e4 LT |
464 | }; |
465 | ||
134c2171 | 466 | #ifdef CONFIG_ACPI_PROCFS |
d7508032 | 467 | static const struct file_operations acpi_system_sleep_fops = { |
cf7acfab | 468 | .owner = THIS_MODULE, |
4be44fcd LB |
469 | .open = acpi_system_sleep_open_fs, |
470 | .read = seq_read, | |
471 | .write = acpi_system_write_sleep, | |
472 | .llseek = seq_lseek, | |
473 | .release = single_release, | |
1da177e4 | 474 | }; |
134c2171 | 475 | #endif /* CONFIG_ACPI_PROCFS */ |
1da177e4 | 476 | |
f5f72b46 | 477 | #ifdef HAVE_ACPI_LEGACY_ALARM |
d7508032 | 478 | static const struct file_operations acpi_system_alarm_fops = { |
cf7acfab | 479 | .owner = THIS_MODULE, |
4be44fcd LB |
480 | .open = acpi_system_alarm_open_fs, |
481 | .read = seq_read, | |
482 | .write = acpi_system_write_alarm, | |
483 | .llseek = seq_lseek, | |
484 | .release = single_release, | |
1da177e4 LT |
485 | }; |
486 | ||
4be44fcd | 487 | static u32 rtc_handler(void *context) |
1da177e4 LT |
488 | { |
489 | acpi_clear_event(ACPI_EVENT_RTC); | |
490 | acpi_disable_event(ACPI_EVENT_RTC, 0); | |
491 | ||
492 | return ACPI_INTERRUPT_HANDLED; | |
493 | } | |
fd350943 | 494 | #endif /* HAVE_ACPI_LEGACY_ALARM */ |
1da177e4 | 495 | |
9cee43e0 | 496 | int __init acpi_sleep_proc_init(void) |
1da177e4 | 497 | { |
134c2171 | 498 | #ifdef CONFIG_ACPI_PROCFS |
c65ade4d | 499 | /* 'sleep' [R/W] */ |
cf7acfab DL |
500 | proc_create("sleep", S_IFREG | S_IRUGO | S_IWUSR, |
501 | acpi_root_dir, &acpi_system_sleep_fops); | |
43532c8a | 502 | #endif /* CONFIG_ACPI_PROCFS */ |
1da177e4 | 503 | |
f5f72b46 | 504 | #ifdef HAVE_ACPI_LEGACY_ALARM |
1da177e4 | 505 | /* 'alarm' [R/W] */ |
cf7acfab DL |
506 | proc_create("alarm", S_IFREG | S_IRUGO | S_IWUSR, |
507 | acpi_root_dir, &acpi_system_alarm_fops); | |
1da177e4 | 508 | |
f5f72b46 | 509 | acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL); |
e1094bfa ZY |
510 | /* |
511 | * Disable the RTC event after installing RTC handler. | |
512 | * Only when RTC alarm is set will it be enabled. | |
513 | */ | |
514 | acpi_clear_event(ACPI_EVENT_RTC); | |
515 | acpi_disable_event(ACPI_EVENT_RTC, 0); | |
fd350943 | 516 | #endif /* HAVE_ACPI_LEGACY_ALARM */ |
f5f72b46 | 517 | |
c65ade4d | 518 | /* 'wakeup device' [R/W] */ |
cf7acfab DL |
519 | proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR, |
520 | acpi_root_dir, &acpi_system_wakeup_device_fops); | |
1da177e4 | 521 | |
1da177e4 LT |
522 | return 0; |
523 | } |