blob: 50d16e3cb0a91ad637124472ac6b570403e86229 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * drivers/base/power/sysfs.c - sysfs entries for device PM
3 */
4
5#include <linux/device.h>
Tim Schmielau8c65b4a2005-11-07 00:59:43 -08006#include <linux/string.h>
Paul Gortmaker1b6bc322011-05-27 07:12:15 -04007#include <linux/export.h>
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +01008#include <linux/pm_qos.h>
Rafael J. Wysocki53823632010-01-23 22:02:51 +01009#include <linux/pm_runtime.h>
Arun Sharma600634972011-07-26 16:09:06 -070010#include <linux/atomic.h>
Arjan van de Ven8d4b9d12010-07-19 02:01:06 +020011#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include "power.h"
13
David Brownell0ac85242005-09-12 19:39:34 -070014/*
Rafael J. Wysocki53823632010-01-23 22:02:51 +010015 * control - Report/change current runtime PM setting of the device
16 *
17 * Runtime power management of a device can be blocked with the help of
18 * this attribute. All devices have one of the following two values for
19 * the power/control file:
20 *
21 * + "auto\n" to allow the device to be power managed at run time;
22 * + "on\n" to prevent the device from being power managed at run time;
23 *
24 * The default for all devices is "auto", which means that devices may be
25 * subject to automatic power management, depending on their drivers.
26 * Changing this attribute to "on" prevents the driver from power managing
27 * the device at run time. Doing that while the device is suspended causes
28 * it to be woken up.
29 *
David Brownell0ac85242005-09-12 19:39:34 -070030 * wakeup - Report/change current wakeup option for device
31 *
32 * Some devices support "wakeup" events, which are hardware signals
33 * used to activate devices from suspended or low power states. Such
34 * devices have one of three values for the sysfs power/wakeup file:
35 *
36 * + "enabled\n" to issue the events;
37 * + "disabled\n" not to do so; or
38 * + "\n" for temporary or permanent inability to issue wakeup.
39 *
40 * (For example, unconfigured USB devices can't issue wakeups.)
41 *
42 * Familiar examples of devices that can issue wakeup events include
43 * keyboards and mice (both PS2 and USB styles), power buttons, modems,
44 * "Wake-On-LAN" Ethernet links, GPIO lines, and more. Some events
45 * will wake the entire system from a suspend state; others may just
46 * wake up the device (if the system as a whole is already active).
47 * Some wakeup events use normal IRQ lines; other use special out
48 * of band signaling.
49 *
50 * It is the responsibility of device drivers to enable (or disable)
51 * wakeup signaling as part of changing device power states, respecting
52 * the policy choices provided through the driver model.
53 *
54 * Devices may not be able to generate wakeup events from all power
55 * states. Also, the events may be ignored in some configurations;
56 * for example, they might need help from other devices that aren't
57 * active, or which may have wakeup disabled. Some drivers rely on
58 * wakeup events internally (unless they are disabled), keeping
59 * their hardware in low power modes whenever they're unused. This
60 * saves runtime power, without requiring system-wide sleep states.
Rafael J. Wysocki5a2eb852010-01-23 22:25:23 +010061 *
62 * async - Report/change current async suspend setting for the device
63 *
64 * Asynchronous suspend and resume of the device during system-wide power
65 * state transitions can be enabled by writing "enabled" to this file.
66 * Analogously, if "disabled" is written to this file, the device will be
67 * suspended and resumed synchronously.
68 *
69 * All devices have one of the following two values for power/async:
70 *
71 * + "enabled\n" to permit the asynchronous suspend/resume of the device;
72 * + "disabled\n" to forbid it;
73 *
74 * NOTE: It generally is unsafe to permit the asynchronous suspend/resume
75 * of a device unless it is certain that all of the PM dependencies of the
76 * device are known to the PM core. However, for some devices this
77 * attribute is set to "enabled" by bus type code or device drivers and in
78 * that cases it should be safe to leave the default value.
Rafael J. Wysockic125e962010-07-05 22:43:53 +020079 *
Alan Stern15bcb91d2010-09-25 23:35:21 +020080 * autosuspend_delay_ms - Report/change a device's autosuspend_delay value
81 *
82 * Some drivers don't want to carry out a runtime suspend as soon as a
83 * device becomes idle; they want it always to remain idle for some period
84 * of time before suspending it. This period is the autosuspend_delay
85 * value (expressed in milliseconds) and it can be controlled by the user.
86 * If the value is negative then the device will never be runtime
87 * suspended.
88 *
89 * NOTE: The autosuspend_delay_ms attribute and the autosuspend_delay
90 * value are used only if the driver calls pm_runtime_use_autosuspend().
91 *
Rafael J. Wysockic125e962010-07-05 22:43:53 +020092 * wakeup_count - Report the number of wakeup events related to the device
David Brownell0ac85242005-09-12 19:39:34 -070093 */
94
95static const char enabled[] = "enabled";
96static const char disabled[] = "disabled";
97
Alan Stern7490e442010-09-25 23:35:15 +020098const char power_group_name[] = "power";
99EXPORT_SYMBOL_GPL(power_group_name);
100
Rafael J. Wysocki53823632010-01-23 22:02:51 +0100101#ifdef CONFIG_PM_RUNTIME
102static const char ctrl_auto[] = "auto";
103static const char ctrl_on[] = "on";
104
105static ssize_t control_show(struct device *dev, struct device_attribute *attr,
106 char *buf)
107{
108 return sprintf(buf, "%s\n",
109 dev->power.runtime_auto ? ctrl_auto : ctrl_on);
110}
111
112static ssize_t control_store(struct device * dev, struct device_attribute *attr,
113 const char * buf, size_t n)
114{
115 char *cp;
116 int len = n;
117
118 cp = memchr(buf, '\n', n);
119 if (cp)
120 len = cp - buf;
Alan Stern69c843b2011-07-06 10:52:23 +0200121 device_lock(dev);
Rafael J. Wysocki53823632010-01-23 22:02:51 +0100122 if (len == sizeof ctrl_auto - 1 && strncmp(buf, ctrl_auto, len) == 0)
123 pm_runtime_allow(dev);
124 else if (len == sizeof ctrl_on - 1 && strncmp(buf, ctrl_on, len) == 0)
125 pm_runtime_forbid(dev);
126 else
Alan Stern69c843b2011-07-06 10:52:23 +0200127 n = -EINVAL;
128 device_unlock(dev);
Rafael J. Wysocki53823632010-01-23 22:02:51 +0100129 return n;
130}
131
132static DEVICE_ATTR(control, 0644, control_show, control_store);
Alan Stern0fcb4ee2010-07-08 00:05:37 +0200133
Arjan van de Ven8d4b9d12010-07-19 02:01:06 +0200134static ssize_t rtpm_active_time_show(struct device *dev,
135 struct device_attribute *attr, char *buf)
136{
137 int ret;
138 spin_lock_irq(&dev->power.lock);
139 update_pm_runtime_accounting(dev);
140 ret = sprintf(buf, "%i\n", jiffies_to_msecs(dev->power.active_jiffies));
141 spin_unlock_irq(&dev->power.lock);
142 return ret;
143}
144
145static DEVICE_ATTR(runtime_active_time, 0444, rtpm_active_time_show, NULL);
146
147static ssize_t rtpm_suspended_time_show(struct device *dev,
148 struct device_attribute *attr, char *buf)
149{
150 int ret;
151 spin_lock_irq(&dev->power.lock);
152 update_pm_runtime_accounting(dev);
153 ret = sprintf(buf, "%i\n",
154 jiffies_to_msecs(dev->power.suspended_jiffies));
155 spin_unlock_irq(&dev->power.lock);
156 return ret;
157}
158
159static DEVICE_ATTR(runtime_suspended_time, 0444, rtpm_suspended_time_show, NULL);
160
Alan Stern0fcb4ee2010-07-08 00:05:37 +0200161static ssize_t rtpm_status_show(struct device *dev,
162 struct device_attribute *attr, char *buf)
163{
164 const char *p;
165
166 if (dev->power.runtime_error) {
167 p = "error\n";
168 } else if (dev->power.disable_depth) {
169 p = "unsupported\n";
170 } else {
171 switch (dev->power.runtime_status) {
172 case RPM_SUSPENDED:
173 p = "suspended\n";
174 break;
175 case RPM_SUSPENDING:
176 p = "suspending\n";
177 break;
178 case RPM_RESUMING:
179 p = "resuming\n";
180 break;
181 case RPM_ACTIVE:
182 p = "active\n";
183 break;
184 default:
185 return -EIO;
186 }
187 }
188 return sprintf(buf, p);
189}
190
191static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL);
Alan Stern15bcb91d2010-09-25 23:35:21 +0200192
193static ssize_t autosuspend_delay_ms_show(struct device *dev,
194 struct device_attribute *attr, char *buf)
195{
196 if (!dev->power.use_autosuspend)
197 return -EIO;
198 return sprintf(buf, "%d\n", dev->power.autosuspend_delay);
199}
200
201static ssize_t autosuspend_delay_ms_store(struct device *dev,
202 struct device_attribute *attr, const char *buf, size_t n)
203{
204 long delay;
205
206 if (!dev->power.use_autosuspend)
207 return -EIO;
208
209 if (strict_strtol(buf, 10, &delay) != 0 || delay != (int) delay)
210 return -EINVAL;
211
Alan Stern69c843b2011-07-06 10:52:23 +0200212 device_lock(dev);
Alan Stern15bcb91d2010-09-25 23:35:21 +0200213 pm_runtime_set_autosuspend_delay(dev, delay);
Alan Stern69c843b2011-07-06 10:52:23 +0200214 device_unlock(dev);
Alan Stern15bcb91d2010-09-25 23:35:21 +0200215 return n;
216}
217
218static DEVICE_ATTR(autosuspend_delay_ms, 0644, autosuspend_delay_ms_show,
219 autosuspend_delay_ms_store);
220
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100221static ssize_t pm_qos_latency_show(struct device *dev,
222 struct device_attribute *attr, char *buf)
223{
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200224 return sprintf(buf, "%d\n", dev_pm_qos_requested_latency(dev));
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100225}
226
227static ssize_t pm_qos_latency_store(struct device *dev,
228 struct device_attribute *attr,
229 const char *buf, size_t n)
230{
231 s32 value;
232 int ret;
233
234 if (kstrtos32(buf, 0, &value))
235 return -EINVAL;
236
237 if (value < 0)
238 return -EINVAL;
239
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200240 ret = dev_pm_qos_update_request(dev->power.qos->latency_req, value);
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100241 return ret < 0 ? ret : n;
242}
243
244static DEVICE_ATTR(pm_qos_resume_latency_us, 0644,
245 pm_qos_latency_show, pm_qos_latency_store);
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200246
247static ssize_t pm_qos_no_power_off_show(struct device *dev,
248 struct device_attribute *attr,
249 char *buf)
250{
251 return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
252 & PM_QOS_FLAG_NO_POWER_OFF));
253}
254
255static ssize_t pm_qos_no_power_off_store(struct device *dev,
256 struct device_attribute *attr,
257 const char *buf, size_t n)
258{
259 int ret;
260
261 if (kstrtoint(buf, 0, &ret))
262 return -EINVAL;
263
264 if (ret != 0 && ret != 1)
265 return -EINVAL;
266
267 ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_NO_POWER_OFF, ret);
268 return ret < 0 ? ret : n;
269}
270
271static DEVICE_ATTR(pm_qos_no_power_off, 0644,
272 pm_qos_no_power_off_show, pm_qos_no_power_off_store);
273
274static ssize_t pm_qos_remote_wakeup_show(struct device *dev,
275 struct device_attribute *attr,
276 char *buf)
277{
278 return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
279 & PM_QOS_FLAG_REMOTE_WAKEUP));
280}
281
282static ssize_t pm_qos_remote_wakeup_store(struct device *dev,
283 struct device_attribute *attr,
284 const char *buf, size_t n)
285{
286 int ret;
287
288 if (kstrtoint(buf, 0, &ret))
289 return -EINVAL;
290
291 if (ret != 0 && ret != 1)
292 return -EINVAL;
293
294 ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP, ret);
295 return ret < 0 ? ret : n;
296}
297
298static DEVICE_ATTR(pm_qos_remote_wakeup, 0644,
299 pm_qos_remote_wakeup_show, pm_qos_remote_wakeup_store);
Rafael J. Wysockie7623182011-05-07 18:11:52 +0200300#endif /* CONFIG_PM_RUNTIME */
Rafael J. Wysocki53823632010-01-23 22:02:51 +0100301
Rafael J. Wysockie7623182011-05-07 18:11:52 +0200302#ifdef CONFIG_PM_SLEEP
David Brownell0ac85242005-09-12 19:39:34 -0700303static ssize_t
304wake_show(struct device * dev, struct device_attribute *attr, char * buf)
305{
306 return sprintf(buf, "%s\n", device_can_wakeup(dev)
307 ? (device_may_wakeup(dev) ? enabled : disabled)
308 : "");
309}
310
311static ssize_t
312wake_store(struct device * dev, struct device_attribute *attr,
313 const char * buf, size_t n)
314{
315 char *cp;
316 int len = n;
317
318 if (!device_can_wakeup(dev))
319 return -EINVAL;
320
321 cp = memchr(buf, '\n', n);
322 if (cp)
323 len = cp - buf;
324 if (len == sizeof enabled - 1
325 && strncmp(buf, enabled, sizeof enabled - 1) == 0)
326 device_set_wakeup_enable(dev, 1);
327 else if (len == sizeof disabled - 1
328 && strncmp(buf, disabled, sizeof disabled - 1) == 0)
329 device_set_wakeup_enable(dev, 0);
330 else
331 return -EINVAL;
332 return n;
333}
334
335static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store);
336
Rafael J. Wysockic125e962010-07-05 22:43:53 +0200337static ssize_t wakeup_count_show(struct device *dev,
338 struct device_attribute *attr, char *buf)
339{
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200340 unsigned long count = 0;
341 bool enabled = false;
342
343 spin_lock_irq(&dev->power.lock);
344 if (dev->power.wakeup) {
345 count = dev->power.wakeup->event_count;
346 enabled = true;
347 }
348 spin_unlock_irq(&dev->power.lock);
349 return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
Rafael J. Wysockic125e962010-07-05 22:43:53 +0200350}
351
352static DEVICE_ATTR(wakeup_count, 0444, wakeup_count_show, NULL);
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200353
354static ssize_t wakeup_active_count_show(struct device *dev,
355 struct device_attribute *attr, char *buf)
356{
357 unsigned long count = 0;
358 bool enabled = false;
359
360 spin_lock_irq(&dev->power.lock);
361 if (dev->power.wakeup) {
362 count = dev->power.wakeup->active_count;
363 enabled = true;
364 }
365 spin_unlock_irq(&dev->power.lock);
366 return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
367}
368
369static DEVICE_ATTR(wakeup_active_count, 0444, wakeup_active_count_show, NULL);
370
Rafael J. Wysocki30e3ce62012-04-29 22:52:52 +0200371static ssize_t wakeup_abort_count_show(struct device *dev,
372 struct device_attribute *attr,
373 char *buf)
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200374{
375 unsigned long count = 0;
376 bool enabled = false;
377
378 spin_lock_irq(&dev->power.lock);
379 if (dev->power.wakeup) {
Rafael J. Wysocki30e3ce62012-04-29 22:52:52 +0200380 count = dev->power.wakeup->wakeup_count;
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200381 enabled = true;
382 }
383 spin_unlock_irq(&dev->power.lock);
384 return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
385}
386
Rafael J. Wysocki30e3ce62012-04-29 22:52:52 +0200387static DEVICE_ATTR(wakeup_abort_count, 0444, wakeup_abort_count_show, NULL);
388
389static ssize_t wakeup_expire_count_show(struct device *dev,
390 struct device_attribute *attr,
391 char *buf)
392{
393 unsigned long count = 0;
394 bool enabled = false;
395
396 spin_lock_irq(&dev->power.lock);
397 if (dev->power.wakeup) {
398 count = dev->power.wakeup->expire_count;
399 enabled = true;
400 }
401 spin_unlock_irq(&dev->power.lock);
402 return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
403}
404
405static DEVICE_ATTR(wakeup_expire_count, 0444, wakeup_expire_count_show, NULL);
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200406
407static ssize_t wakeup_active_show(struct device *dev,
408 struct device_attribute *attr, char *buf)
409{
410 unsigned int active = 0;
411 bool enabled = false;
412
413 spin_lock_irq(&dev->power.lock);
414 if (dev->power.wakeup) {
415 active = dev->power.wakeup->active;
416 enabled = true;
417 }
418 spin_unlock_irq(&dev->power.lock);
419 return enabled ? sprintf(buf, "%u\n", active) : sprintf(buf, "\n");
420}
421
422static DEVICE_ATTR(wakeup_active, 0444, wakeup_active_show, NULL);
423
424static ssize_t wakeup_total_time_show(struct device *dev,
425 struct device_attribute *attr, char *buf)
426{
427 s64 msec = 0;
428 bool enabled = false;
429
430 spin_lock_irq(&dev->power.lock);
431 if (dev->power.wakeup) {
432 msec = ktime_to_ms(dev->power.wakeup->total_time);
433 enabled = true;
434 }
435 spin_unlock_irq(&dev->power.lock);
436 return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
437}
438
439static DEVICE_ATTR(wakeup_total_time_ms, 0444, wakeup_total_time_show, NULL);
440
441static ssize_t wakeup_max_time_show(struct device *dev,
442 struct device_attribute *attr, char *buf)
443{
444 s64 msec = 0;
445 bool enabled = false;
446
447 spin_lock_irq(&dev->power.lock);
448 if (dev->power.wakeup) {
449 msec = ktime_to_ms(dev->power.wakeup->max_time);
450 enabled = true;
451 }
452 spin_unlock_irq(&dev->power.lock);
453 return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
454}
455
456static DEVICE_ATTR(wakeup_max_time_ms, 0444, wakeup_max_time_show, NULL);
457
458static ssize_t wakeup_last_time_show(struct device *dev,
459 struct device_attribute *attr, char *buf)
460{
461 s64 msec = 0;
462 bool enabled = false;
463
464 spin_lock_irq(&dev->power.lock);
465 if (dev->power.wakeup) {
466 msec = ktime_to_ms(dev->power.wakeup->last_time);
467 enabled = true;
468 }
469 spin_unlock_irq(&dev->power.lock);
470 return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
471}
472
473static DEVICE_ATTR(wakeup_last_time_ms, 0444, wakeup_last_time_show, NULL);
Rafael J. Wysocki55850942012-04-29 22:53:32 +0200474
475#ifdef CONFIG_PM_AUTOSLEEP
476static ssize_t wakeup_prevent_sleep_time_show(struct device *dev,
477 struct device_attribute *attr,
478 char *buf)
479{
480 s64 msec = 0;
481 bool enabled = false;
482
483 spin_lock_irq(&dev->power.lock);
484 if (dev->power.wakeup) {
485 msec = ktime_to_ms(dev->power.wakeup->prevent_sleep_time);
486 enabled = true;
487 }
488 spin_unlock_irq(&dev->power.lock);
489 return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
490}
491
492static DEVICE_ATTR(wakeup_prevent_sleep_time_ms, 0444,
493 wakeup_prevent_sleep_time_show, NULL);
494#endif /* CONFIG_PM_AUTOSLEEP */
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200495#endif /* CONFIG_PM_SLEEP */
Rafael J. Wysockic125e962010-07-05 22:43:53 +0200496
Dominik Brodowskic92445f2010-04-23 20:32:23 +0200497#ifdef CONFIG_PM_ADVANCED_DEBUG
498#ifdef CONFIG_PM_RUNTIME
499
500static ssize_t rtpm_usagecount_show(struct device *dev,
501 struct device_attribute *attr, char *buf)
502{
503 return sprintf(buf, "%d\n", atomic_read(&dev->power.usage_count));
504}
505
506static ssize_t rtpm_children_show(struct device *dev,
507 struct device_attribute *attr, char *buf)
508{
509 return sprintf(buf, "%d\n", dev->power.ignore_children ?
510 0 : atomic_read(&dev->power.child_count));
511}
512
513static ssize_t rtpm_enabled_show(struct device *dev,
514 struct device_attribute *attr, char *buf)
515{
516 if ((dev->power.disable_depth) && (dev->power.runtime_auto == false))
517 return sprintf(buf, "disabled & forbidden\n");
518 else if (dev->power.disable_depth)
519 return sprintf(buf, "disabled\n");
520 else if (dev->power.runtime_auto == false)
521 return sprintf(buf, "forbidden\n");
522 return sprintf(buf, "enabled\n");
523}
524
Dominik Brodowskic92445f2010-04-23 20:32:23 +0200525static DEVICE_ATTR(runtime_usage, 0444, rtpm_usagecount_show, NULL);
526static DEVICE_ATTR(runtime_active_kids, 0444, rtpm_children_show, NULL);
Dominik Brodowskic92445f2010-04-23 20:32:23 +0200527static DEVICE_ATTR(runtime_enabled, 0444, rtpm_enabled_show, NULL);
528
529#endif
530
Rafael J. Wysockid181b492012-07-11 22:42:58 +0200531#ifdef CONFIG_PM_SLEEP
532
Rafael J. Wysocki5a2eb852010-01-23 22:25:23 +0100533static ssize_t async_show(struct device *dev, struct device_attribute *attr,
534 char *buf)
535{
536 return sprintf(buf, "%s\n",
537 device_async_suspend_enabled(dev) ? enabled : disabled);
538}
539
540static ssize_t async_store(struct device *dev, struct device_attribute *attr,
541 const char *buf, size_t n)
542{
543 char *cp;
544 int len = n;
545
546 cp = memchr(buf, '\n', n);
547 if (cp)
548 len = cp - buf;
549 if (len == sizeof enabled - 1 && strncmp(buf, enabled, len) == 0)
550 device_enable_async_suspend(dev);
551 else if (len == sizeof disabled - 1 && strncmp(buf, disabled, len) == 0)
552 device_disable_async_suspend(dev);
553 else
554 return -EINVAL;
555 return n;
556}
557
558static DEVICE_ATTR(async, 0644, async_show, async_store);
Rafael J. Wysockid181b492012-07-11 22:42:58 +0200559
560#endif
Dominik Brodowskic92445f2010-04-23 20:32:23 +0200561#endif /* CONFIG_PM_ADVANCED_DEBUG */
David Brownell0ac85242005-09-12 19:39:34 -0700562
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100563static struct attribute *power_attrs[] = {
564#ifdef CONFIG_PM_ADVANCED_DEBUG
Rafael J. Wysockic125e962010-07-05 22:43:53 +0200565#ifdef CONFIG_PM_SLEEP
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100566 &dev_attr_async.attr,
567#endif
568#ifdef CONFIG_PM_RUNTIME
569 &dev_attr_runtime_status.attr,
570 &dev_attr_runtime_usage.attr,
571 &dev_attr_runtime_active_kids.attr,
572 &dev_attr_runtime_enabled.attr,
573#endif
574#endif /* CONFIG_PM_ADVANCED_DEBUG */
575 NULL,
576};
577static struct attribute_group pm_attr_group = {
578 .name = power_group_name,
579 .attrs = power_attrs,
580};
581
582static struct attribute *wakeup_attrs[] = {
583#ifdef CONFIG_PM_SLEEP
584 &dev_attr_wakeup.attr,
Rafael J. Wysockic125e962010-07-05 22:43:53 +0200585 &dev_attr_wakeup_count.attr,
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200586 &dev_attr_wakeup_active_count.attr,
Rafael J. Wysocki30e3ce62012-04-29 22:52:52 +0200587 &dev_attr_wakeup_abort_count.attr,
588 &dev_attr_wakeup_expire_count.attr,
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200589 &dev_attr_wakeup_active.attr,
590 &dev_attr_wakeup_total_time_ms.attr,
591 &dev_attr_wakeup_max_time_ms.attr,
592 &dev_attr_wakeup_last_time_ms.attr,
Rafael J. Wysocki55850942012-04-29 22:53:32 +0200593#ifdef CONFIG_PM_AUTOSLEEP
594 &dev_attr_wakeup_prevent_sleep_time_ms.attr,
595#endif
Rafael J. Wysockic125e962010-07-05 22:43:53 +0200596#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 NULL,
598};
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100599static struct attribute_group pm_wakeup_attr_group = {
Alan Stern7490e442010-09-25 23:35:15 +0200600 .name = power_group_name,
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100601 .attrs = wakeup_attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602};
603
Alan Stern7490e442010-09-25 23:35:15 +0200604static struct attribute *runtime_attrs[] = {
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100605#ifdef CONFIG_PM_RUNTIME
Alan Stern7490e442010-09-25 23:35:15 +0200606#ifndef CONFIG_PM_ADVANCED_DEBUG
607 &dev_attr_runtime_status.attr,
608#endif
609 &dev_attr_control.attr,
610 &dev_attr_runtime_suspended_time.attr,
611 &dev_attr_runtime_active_time.attr,
Alan Stern15bcb91d2010-09-25 23:35:21 +0200612 &dev_attr_autosuspend_delay_ms.attr,
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100613#endif /* CONFIG_PM_RUNTIME */
Alan Stern7490e442010-09-25 23:35:15 +0200614 NULL,
615};
616static struct attribute_group pm_runtime_attr_group = {
617 .name = power_group_name,
618 .attrs = runtime_attrs,
619};
620
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200621static struct attribute *pm_qos_latency_attrs[] = {
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100622#ifdef CONFIG_PM_RUNTIME
623 &dev_attr_pm_qos_resume_latency_us.attr,
624#endif /* CONFIG_PM_RUNTIME */
625 NULL,
626};
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200627static struct attribute_group pm_qos_latency_attr_group = {
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100628 .name = power_group_name,
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200629 .attrs = pm_qos_latency_attrs,
630};
631
632static struct attribute *pm_qos_flags_attrs[] = {
633#ifdef CONFIG_PM_RUNTIME
634 &dev_attr_pm_qos_no_power_off.attr,
635 &dev_attr_pm_qos_remote_wakeup.attr,
636#endif /* CONFIG_PM_RUNTIME */
637 NULL,
638};
639static struct attribute_group pm_qos_flags_attr_group = {
640 .name = power_group_name,
641 .attrs = pm_qos_flags_attrs,
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100642};
643
Alan Stern7490e442010-09-25 23:35:15 +0200644int dpm_sysfs_add(struct device *dev)
645{
646 int rc;
647
648 rc = sysfs_create_group(&dev->kobj, &pm_attr_group);
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100649 if (rc)
650 return rc;
651
652 if (pm_runtime_callbacks_present(dev)) {
Alan Stern7490e442010-09-25 23:35:15 +0200653 rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group);
654 if (rc)
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100655 goto err_out;
Alan Stern7490e442010-09-25 23:35:15 +0200656 }
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100657
658 if (device_can_wakeup(dev)) {
659 rc = sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group);
660 if (rc) {
661 if (pm_runtime_callbacks_present(dev))
662 sysfs_unmerge_group(&dev->kobj,
663 &pm_runtime_attr_group);
664 goto err_out;
665 }
666 }
667 return 0;
668
669 err_out:
670 sysfs_remove_group(&dev->kobj, &pm_attr_group);
Alan Stern7490e442010-09-25 23:35:15 +0200671 return rc;
672}
673
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100674int wakeup_sysfs_add(struct device *dev)
675{
676 return sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group);
677}
678
679void wakeup_sysfs_remove(struct device *dev)
680{
681 sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);
682}
683
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200684int pm_qos_sysfs_add_latency(struct device *dev)
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100685{
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200686 return sysfs_merge_group(&dev->kobj, &pm_qos_latency_attr_group);
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100687}
688
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200689void pm_qos_sysfs_remove_latency(struct device *dev)
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100690{
Rafael J. Wysockie39473d2012-10-24 02:08:18 +0200691 sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_attr_group);
692}
693
694int pm_qos_sysfs_add_flags(struct device *dev)
695{
696 return sysfs_merge_group(&dev->kobj, &pm_qos_flags_attr_group);
697}
698
699void pm_qos_sysfs_remove_flags(struct device *dev)
700{
701 sysfs_unmerge_group(&dev->kobj, &pm_qos_flags_attr_group);
Rafael J. Wysocki85dc0b82012-03-13 01:01:39 +0100702}
703
Alan Stern7490e442010-09-25 23:35:15 +0200704void rpm_sysfs_remove(struct device *dev)
705{
706 sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group);
707}
708
709void dpm_sysfs_remove(struct device *dev)
710{
711 rpm_sysfs_remove(dev);
Rafael J. Wysockicb8f51b2011-02-08 23:26:02 +0100712 sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);
Alan Stern7490e442010-09-25 23:35:15 +0200713 sysfs_remove_group(&dev->kobj, &pm_attr_group);
714}