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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/base/power/sysfs.c - sysfs entries for device PM | |
3 | */ | |
4 | ||
5 | #include <linux/device.h> | |
8c65b4a6 | 6 | #include <linux/string.h> |
1b6bc32f | 7 | #include <linux/export.h> |
85dc0b8a | 8 | #include <linux/pm_qos.h> |
53823639 | 9 | #include <linux/pm_runtime.h> |
60063497 | 10 | #include <linux/atomic.h> |
8d4b9d1b | 11 | #include <linux/jiffies.h> |
1da177e4 LT |
12 | #include "power.h" |
13 | ||
0ac85241 | 14 | /* |
53823639 RW |
15 | * 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 | * | |
0ac85241 DB |
30 | * 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. | |
5a2eb858 RW |
61 | * |
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. | |
c125e96f | 79 | * |
15bcb91d AS |
80 | * 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 | * | |
c125e96f | 92 | * wakeup_count - Report the number of wakeup events related to the device |
0ac85241 DB |
93 | */ |
94 | ||
7490e442 AS |
95 | const char power_group_name[] = "power"; |
96 | EXPORT_SYMBOL_GPL(power_group_name); | |
97 | ||
53823639 RW |
98 | static const char ctrl_auto[] = "auto"; |
99 | static const char ctrl_on[] = "on"; | |
100 | ||
101 | static ssize_t control_show(struct device *dev, struct device_attribute *attr, | |
102 | char *buf) | |
103 | { | |
104 | return sprintf(buf, "%s\n", | |
105 | dev->power.runtime_auto ? ctrl_auto : ctrl_on); | |
106 | } | |
107 | ||
108 | static ssize_t control_store(struct device * dev, struct device_attribute *attr, | |
109 | const char * buf, size_t n) | |
110 | { | |
111 | char *cp; | |
112 | int len = n; | |
113 | ||
114 | cp = memchr(buf, '\n', n); | |
115 | if (cp) | |
116 | len = cp - buf; | |
69c843b4 | 117 | device_lock(dev); |
53823639 RW |
118 | if (len == sizeof ctrl_auto - 1 && strncmp(buf, ctrl_auto, len) == 0) |
119 | pm_runtime_allow(dev); | |
120 | else if (len == sizeof ctrl_on - 1 && strncmp(buf, ctrl_on, len) == 0) | |
121 | pm_runtime_forbid(dev); | |
122 | else | |
69c843b4 AS |
123 | n = -EINVAL; |
124 | device_unlock(dev); | |
53823639 RW |
125 | return n; |
126 | } | |
127 | ||
128 | static DEVICE_ATTR(control, 0644, control_show, control_store); | |
0fcb4eef | 129 | |
8d4b9d1b AV |
130 | static ssize_t rtpm_active_time_show(struct device *dev, |
131 | struct device_attribute *attr, char *buf) | |
132 | { | |
133 | int ret; | |
134 | spin_lock_irq(&dev->power.lock); | |
135 | update_pm_runtime_accounting(dev); | |
136 | ret = sprintf(buf, "%i\n", jiffies_to_msecs(dev->power.active_jiffies)); | |
137 | spin_unlock_irq(&dev->power.lock); | |
138 | return ret; | |
139 | } | |
140 | ||
141 | static DEVICE_ATTR(runtime_active_time, 0444, rtpm_active_time_show, NULL); | |
142 | ||
143 | static ssize_t rtpm_suspended_time_show(struct device *dev, | |
144 | struct device_attribute *attr, char *buf) | |
145 | { | |
146 | int ret; | |
147 | spin_lock_irq(&dev->power.lock); | |
148 | update_pm_runtime_accounting(dev); | |
149 | ret = sprintf(buf, "%i\n", | |
150 | jiffies_to_msecs(dev->power.suspended_jiffies)); | |
151 | spin_unlock_irq(&dev->power.lock); | |
152 | return ret; | |
153 | } | |
154 | ||
155 | static DEVICE_ATTR(runtime_suspended_time, 0444, rtpm_suspended_time_show, NULL); | |
156 | ||
0fcb4eef AS |
157 | static ssize_t rtpm_status_show(struct device *dev, |
158 | struct device_attribute *attr, char *buf) | |
159 | { | |
160 | const char *p; | |
161 | ||
162 | if (dev->power.runtime_error) { | |
163 | p = "error\n"; | |
164 | } else if (dev->power.disable_depth) { | |
165 | p = "unsupported\n"; | |
166 | } else { | |
167 | switch (dev->power.runtime_status) { | |
168 | case RPM_SUSPENDED: | |
169 | p = "suspended\n"; | |
170 | break; | |
171 | case RPM_SUSPENDING: | |
172 | p = "suspending\n"; | |
173 | break; | |
174 | case RPM_RESUMING: | |
175 | p = "resuming\n"; | |
176 | break; | |
177 | case RPM_ACTIVE: | |
178 | p = "active\n"; | |
179 | break; | |
180 | default: | |
181 | return -EIO; | |
182 | } | |
183 | } | |
184 | return sprintf(buf, p); | |
185 | } | |
186 | ||
187 | static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL); | |
15bcb91d AS |
188 | |
189 | static ssize_t autosuspend_delay_ms_show(struct device *dev, | |
190 | struct device_attribute *attr, char *buf) | |
191 | { | |
192 | if (!dev->power.use_autosuspend) | |
193 | return -EIO; | |
194 | return sprintf(buf, "%d\n", dev->power.autosuspend_delay); | |
195 | } | |
196 | ||
197 | static ssize_t autosuspend_delay_ms_store(struct device *dev, | |
198 | struct device_attribute *attr, const char *buf, size_t n) | |
199 | { | |
200 | long delay; | |
201 | ||
202 | if (!dev->power.use_autosuspend) | |
203 | return -EIO; | |
204 | ||
34da5e67 | 205 | if (kstrtol(buf, 10, &delay) != 0 || delay != (int) delay) |
15bcb91d AS |
206 | return -EINVAL; |
207 | ||
69c843b4 | 208 | device_lock(dev); |
15bcb91d | 209 | pm_runtime_set_autosuspend_delay(dev, delay); |
69c843b4 | 210 | device_unlock(dev); |
15bcb91d AS |
211 | return n; |
212 | } | |
213 | ||
214 | static DEVICE_ATTR(autosuspend_delay_ms, 0644, autosuspend_delay_ms_show, | |
215 | autosuspend_delay_ms_store); | |
216 | ||
b02f6695 RW |
217 | static ssize_t pm_qos_resume_latency_show(struct device *dev, |
218 | struct device_attribute *attr, | |
219 | char *buf) | |
85dc0b8a | 220 | { |
b02f6695 | 221 | return sprintf(buf, "%d\n", dev_pm_qos_requested_resume_latency(dev)); |
85dc0b8a RW |
222 | } |
223 | ||
b02f6695 RW |
224 | static ssize_t pm_qos_resume_latency_store(struct device *dev, |
225 | struct device_attribute *attr, | |
226 | const char *buf, size_t n) | |
85dc0b8a RW |
227 | { |
228 | s32 value; | |
229 | int ret; | |
230 | ||
231 | if (kstrtos32(buf, 0, &value)) | |
232 | return -EINVAL; | |
233 | ||
234 | if (value < 0) | |
235 | return -EINVAL; | |
236 | ||
b02f6695 RW |
237 | ret = dev_pm_qos_update_request(dev->power.qos->resume_latency_req, |
238 | value); | |
85dc0b8a RW |
239 | return ret < 0 ? ret : n; |
240 | } | |
241 | ||
242 | static DEVICE_ATTR(pm_qos_resume_latency_us, 0644, | |
b02f6695 | 243 | pm_qos_resume_latency_show, pm_qos_resume_latency_store); |
e39473d0 | 244 | |
2d984ad1 RW |
245 | static ssize_t pm_qos_latency_tolerance_show(struct device *dev, |
246 | struct device_attribute *attr, | |
247 | char *buf) | |
248 | { | |
249 | s32 value = dev_pm_qos_get_user_latency_tolerance(dev); | |
250 | ||
251 | if (value < 0) | |
252 | return sprintf(buf, "auto\n"); | |
253 | else if (value == PM_QOS_LATENCY_ANY) | |
254 | return sprintf(buf, "any\n"); | |
255 | ||
256 | return sprintf(buf, "%d\n", value); | |
257 | } | |
258 | ||
259 | static ssize_t pm_qos_latency_tolerance_store(struct device *dev, | |
260 | struct device_attribute *attr, | |
261 | const char *buf, size_t n) | |
262 | { | |
263 | s32 value; | |
264 | int ret; | |
265 | ||
ee061da8 AL |
266 | if (kstrtos32(buf, 0, &value) == 0) { |
267 | /* Users can't write negative values directly */ | |
268 | if (value < 0) | |
269 | return -EINVAL; | |
270 | } else { | |
2d984ad1 RW |
271 | if (!strcmp(buf, "auto") || !strcmp(buf, "auto\n")) |
272 | value = PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; | |
273 | else if (!strcmp(buf, "any") || !strcmp(buf, "any\n")) | |
274 | value = PM_QOS_LATENCY_ANY; | |
2ca30331 DC |
275 | else |
276 | return -EINVAL; | |
2d984ad1 RW |
277 | } |
278 | ret = dev_pm_qos_update_user_latency_tolerance(dev, value); | |
279 | return ret < 0 ? ret : n; | |
280 | } | |
281 | ||
282 | static DEVICE_ATTR(pm_qos_latency_tolerance_us, 0644, | |
283 | pm_qos_latency_tolerance_show, pm_qos_latency_tolerance_store); | |
284 | ||
e39473d0 RW |
285 | static ssize_t pm_qos_no_power_off_show(struct device *dev, |
286 | struct device_attribute *attr, | |
287 | char *buf) | |
288 | { | |
289 | return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev) | |
290 | & PM_QOS_FLAG_NO_POWER_OFF)); | |
291 | } | |
292 | ||
293 | static ssize_t pm_qos_no_power_off_store(struct device *dev, | |
294 | struct device_attribute *attr, | |
295 | const char *buf, size_t n) | |
296 | { | |
297 | int ret; | |
298 | ||
299 | if (kstrtoint(buf, 0, &ret)) | |
300 | return -EINVAL; | |
301 | ||
302 | if (ret != 0 && ret != 1) | |
303 | return -EINVAL; | |
304 | ||
305 | ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_NO_POWER_OFF, ret); | |
306 | return ret < 0 ? ret : n; | |
307 | } | |
308 | ||
309 | static DEVICE_ATTR(pm_qos_no_power_off, 0644, | |
310 | pm_qos_no_power_off_show, pm_qos_no_power_off_store); | |
311 | ||
312 | static ssize_t pm_qos_remote_wakeup_show(struct device *dev, | |
313 | struct device_attribute *attr, | |
314 | char *buf) | |
315 | { | |
316 | return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev) | |
317 | & PM_QOS_FLAG_REMOTE_WAKEUP)); | |
318 | } | |
319 | ||
320 | static ssize_t pm_qos_remote_wakeup_store(struct device *dev, | |
321 | struct device_attribute *attr, | |
322 | const char *buf, size_t n) | |
323 | { | |
324 | int ret; | |
325 | ||
326 | if (kstrtoint(buf, 0, &ret)) | |
327 | return -EINVAL; | |
328 | ||
329 | if (ret != 0 && ret != 1) | |
330 | return -EINVAL; | |
331 | ||
332 | ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP, ret); | |
333 | return ret < 0 ? ret : n; | |
334 | } | |
335 | ||
336 | static DEVICE_ATTR(pm_qos_remote_wakeup, 0644, | |
337 | pm_qos_remote_wakeup_show, pm_qos_remote_wakeup_store); | |
53823639 | 338 | |
e762318b | 339 | #ifdef CONFIG_PM_SLEEP |
2b4f4313 JB |
340 | static const char _enabled[] = "enabled"; |
341 | static const char _disabled[] = "disabled"; | |
342 | ||
0ac85241 DB |
343 | static ssize_t |
344 | wake_show(struct device * dev, struct device_attribute *attr, char * buf) | |
345 | { | |
346 | return sprintf(buf, "%s\n", device_can_wakeup(dev) | |
2b4f4313 | 347 | ? (device_may_wakeup(dev) ? _enabled : _disabled) |
0ac85241 DB |
348 | : ""); |
349 | } | |
350 | ||
351 | static ssize_t | |
352 | wake_store(struct device * dev, struct device_attribute *attr, | |
353 | const char * buf, size_t n) | |
354 | { | |
355 | char *cp; | |
356 | int len = n; | |
357 | ||
358 | if (!device_can_wakeup(dev)) | |
359 | return -EINVAL; | |
360 | ||
361 | cp = memchr(buf, '\n', n); | |
362 | if (cp) | |
363 | len = cp - buf; | |
2b4f4313 JB |
364 | if (len == sizeof _enabled - 1 |
365 | && strncmp(buf, _enabled, sizeof _enabled - 1) == 0) | |
0ac85241 | 366 | device_set_wakeup_enable(dev, 1); |
2b4f4313 JB |
367 | else if (len == sizeof _disabled - 1 |
368 | && strncmp(buf, _disabled, sizeof _disabled - 1) == 0) | |
0ac85241 DB |
369 | device_set_wakeup_enable(dev, 0); |
370 | else | |
371 | return -EINVAL; | |
372 | return n; | |
373 | } | |
374 | ||
375 | static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store); | |
376 | ||
c125e96f RW |
377 | static ssize_t wakeup_count_show(struct device *dev, |
378 | struct device_attribute *attr, char *buf) | |
379 | { | |
074037ec RW |
380 | unsigned long count = 0; |
381 | bool enabled = false; | |
382 | ||
383 | spin_lock_irq(&dev->power.lock); | |
384 | if (dev->power.wakeup) { | |
385 | count = dev->power.wakeup->event_count; | |
386 | enabled = true; | |
387 | } | |
388 | spin_unlock_irq(&dev->power.lock); | |
389 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); | |
c125e96f RW |
390 | } |
391 | ||
392 | static DEVICE_ATTR(wakeup_count, 0444, wakeup_count_show, NULL); | |
074037ec RW |
393 | |
394 | static ssize_t wakeup_active_count_show(struct device *dev, | |
395 | struct device_attribute *attr, char *buf) | |
396 | { | |
397 | unsigned long count = 0; | |
398 | bool enabled = false; | |
399 | ||
400 | spin_lock_irq(&dev->power.lock); | |
401 | if (dev->power.wakeup) { | |
402 | count = dev->power.wakeup->active_count; | |
403 | enabled = true; | |
404 | } | |
405 | spin_unlock_irq(&dev->power.lock); | |
406 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); | |
407 | } | |
408 | ||
409 | static DEVICE_ATTR(wakeup_active_count, 0444, wakeup_active_count_show, NULL); | |
410 | ||
30e3ce6d RW |
411 | static ssize_t wakeup_abort_count_show(struct device *dev, |
412 | struct device_attribute *attr, | |
413 | char *buf) | |
414 | { | |
415 | unsigned long count = 0; | |
416 | bool enabled = false; | |
417 | ||
418 | spin_lock_irq(&dev->power.lock); | |
419 | if (dev->power.wakeup) { | |
420 | count = dev->power.wakeup->wakeup_count; | |
421 | enabled = true; | |
422 | } | |
423 | spin_unlock_irq(&dev->power.lock); | |
424 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); | |
425 | } | |
426 | ||
427 | static DEVICE_ATTR(wakeup_abort_count, 0444, wakeup_abort_count_show, NULL); | |
428 | ||
429 | static ssize_t wakeup_expire_count_show(struct device *dev, | |
430 | struct device_attribute *attr, | |
431 | char *buf) | |
074037ec RW |
432 | { |
433 | unsigned long count = 0; | |
434 | bool enabled = false; | |
435 | ||
436 | spin_lock_irq(&dev->power.lock); | |
437 | if (dev->power.wakeup) { | |
30e3ce6d | 438 | count = dev->power.wakeup->expire_count; |
074037ec RW |
439 | enabled = true; |
440 | } | |
441 | spin_unlock_irq(&dev->power.lock); | |
442 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); | |
443 | } | |
444 | ||
30e3ce6d | 445 | static DEVICE_ATTR(wakeup_expire_count, 0444, wakeup_expire_count_show, NULL); |
074037ec RW |
446 | |
447 | static ssize_t wakeup_active_show(struct device *dev, | |
448 | struct device_attribute *attr, char *buf) | |
449 | { | |
450 | unsigned int active = 0; | |
451 | bool enabled = false; | |
452 | ||
453 | spin_lock_irq(&dev->power.lock); | |
454 | if (dev->power.wakeup) { | |
455 | active = dev->power.wakeup->active; | |
456 | enabled = true; | |
457 | } | |
458 | spin_unlock_irq(&dev->power.lock); | |
459 | return enabled ? sprintf(buf, "%u\n", active) : sprintf(buf, "\n"); | |
460 | } | |
461 | ||
462 | static DEVICE_ATTR(wakeup_active, 0444, wakeup_active_show, NULL); | |
463 | ||
464 | static ssize_t wakeup_total_time_show(struct device *dev, | |
465 | struct device_attribute *attr, char *buf) | |
466 | { | |
467 | s64 msec = 0; | |
468 | bool enabled = false; | |
469 | ||
470 | spin_lock_irq(&dev->power.lock); | |
471 | if (dev->power.wakeup) { | |
472 | msec = ktime_to_ms(dev->power.wakeup->total_time); | |
473 | enabled = true; | |
474 | } | |
475 | spin_unlock_irq(&dev->power.lock); | |
476 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); | |
477 | } | |
478 | ||
479 | static DEVICE_ATTR(wakeup_total_time_ms, 0444, wakeup_total_time_show, NULL); | |
480 | ||
481 | static ssize_t wakeup_max_time_show(struct device *dev, | |
482 | struct device_attribute *attr, char *buf) | |
483 | { | |
484 | s64 msec = 0; | |
485 | bool enabled = false; | |
486 | ||
487 | spin_lock_irq(&dev->power.lock); | |
488 | if (dev->power.wakeup) { | |
489 | msec = ktime_to_ms(dev->power.wakeup->max_time); | |
490 | enabled = true; | |
491 | } | |
492 | spin_unlock_irq(&dev->power.lock); | |
493 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); | |
494 | } | |
495 | ||
496 | static DEVICE_ATTR(wakeup_max_time_ms, 0444, wakeup_max_time_show, NULL); | |
497 | ||
498 | static ssize_t wakeup_last_time_show(struct device *dev, | |
499 | struct device_attribute *attr, char *buf) | |
500 | { | |
501 | s64 msec = 0; | |
502 | bool enabled = false; | |
503 | ||
504 | spin_lock_irq(&dev->power.lock); | |
505 | if (dev->power.wakeup) { | |
506 | msec = ktime_to_ms(dev->power.wakeup->last_time); | |
507 | enabled = true; | |
508 | } | |
509 | spin_unlock_irq(&dev->power.lock); | |
510 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); | |
511 | } | |
512 | ||
513 | static DEVICE_ATTR(wakeup_last_time_ms, 0444, wakeup_last_time_show, NULL); | |
55850945 RW |
514 | |
515 | #ifdef CONFIG_PM_AUTOSLEEP | |
516 | static ssize_t wakeup_prevent_sleep_time_show(struct device *dev, | |
517 | struct device_attribute *attr, | |
518 | char *buf) | |
519 | { | |
520 | s64 msec = 0; | |
521 | bool enabled = false; | |
522 | ||
523 | spin_lock_irq(&dev->power.lock); | |
524 | if (dev->power.wakeup) { | |
525 | msec = ktime_to_ms(dev->power.wakeup->prevent_sleep_time); | |
526 | enabled = true; | |
527 | } | |
528 | spin_unlock_irq(&dev->power.lock); | |
529 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); | |
530 | } | |
531 | ||
532 | static DEVICE_ATTR(wakeup_prevent_sleep_time_ms, 0444, | |
533 | wakeup_prevent_sleep_time_show, NULL); | |
534 | #endif /* CONFIG_PM_AUTOSLEEP */ | |
074037ec | 535 | #endif /* CONFIG_PM_SLEEP */ |
c125e96f | 536 | |
c92445fa | 537 | #ifdef CONFIG_PM_ADVANCED_DEBUG |
c92445fa DB |
538 | static ssize_t rtpm_usagecount_show(struct device *dev, |
539 | struct device_attribute *attr, char *buf) | |
540 | { | |
541 | return sprintf(buf, "%d\n", atomic_read(&dev->power.usage_count)); | |
542 | } | |
543 | ||
544 | static ssize_t rtpm_children_show(struct device *dev, | |
545 | struct device_attribute *attr, char *buf) | |
546 | { | |
547 | return sprintf(buf, "%d\n", dev->power.ignore_children ? | |
548 | 0 : atomic_read(&dev->power.child_count)); | |
549 | } | |
550 | ||
551 | static ssize_t rtpm_enabled_show(struct device *dev, | |
552 | struct device_attribute *attr, char *buf) | |
553 | { | |
554 | if ((dev->power.disable_depth) && (dev->power.runtime_auto == false)) | |
555 | return sprintf(buf, "disabled & forbidden\n"); | |
556 | else if (dev->power.disable_depth) | |
557 | return sprintf(buf, "disabled\n"); | |
558 | else if (dev->power.runtime_auto == false) | |
559 | return sprintf(buf, "forbidden\n"); | |
560 | return sprintf(buf, "enabled\n"); | |
561 | } | |
562 | ||
c92445fa DB |
563 | static DEVICE_ATTR(runtime_usage, 0444, rtpm_usagecount_show, NULL); |
564 | static DEVICE_ATTR(runtime_active_kids, 0444, rtpm_children_show, NULL); | |
c92445fa DB |
565 | static DEVICE_ATTR(runtime_enabled, 0444, rtpm_enabled_show, NULL); |
566 | ||
d181b49e | 567 | #ifdef CONFIG_PM_SLEEP |
5a2eb858 RW |
568 | static ssize_t async_show(struct device *dev, struct device_attribute *attr, |
569 | char *buf) | |
570 | { | |
571 | return sprintf(buf, "%s\n", | |
2b4f4313 JB |
572 | device_async_suspend_enabled(dev) ? |
573 | _enabled : _disabled); | |
5a2eb858 RW |
574 | } |
575 | ||
576 | static ssize_t async_store(struct device *dev, struct device_attribute *attr, | |
577 | const char *buf, size_t n) | |
578 | { | |
579 | char *cp; | |
580 | int len = n; | |
581 | ||
582 | cp = memchr(buf, '\n', n); | |
583 | if (cp) | |
584 | len = cp - buf; | |
2b4f4313 | 585 | if (len == sizeof _enabled - 1 && strncmp(buf, _enabled, len) == 0) |
5a2eb858 | 586 | device_enable_async_suspend(dev); |
2b4f4313 JB |
587 | else if (len == sizeof _disabled - 1 && |
588 | strncmp(buf, _disabled, len) == 0) | |
5a2eb858 RW |
589 | device_disable_async_suspend(dev); |
590 | else | |
591 | return -EINVAL; | |
592 | return n; | |
593 | } | |
594 | ||
595 | static DEVICE_ATTR(async, 0644, async_show, async_store); | |
d181b49e | 596 | |
d30d819d | 597 | #endif /* CONFIG_PM_SLEEP */ |
c92445fa | 598 | #endif /* CONFIG_PM_ADVANCED_DEBUG */ |
0ac85241 | 599 | |
cb8f51bd | 600 | static struct attribute *power_attrs[] = { |
c92445fa | 601 | #ifdef CONFIG_PM_ADVANCED_DEBUG |
cb8f51bd | 602 | #ifdef CONFIG_PM_SLEEP |
5a2eb858 | 603 | &dev_attr_async.attr, |
cb8f51bd | 604 | #endif |
7490e442 | 605 | &dev_attr_runtime_status.attr, |
c92445fa DB |
606 | &dev_attr_runtime_usage.attr, |
607 | &dev_attr_runtime_active_kids.attr, | |
c92445fa | 608 | &dev_attr_runtime_enabled.attr, |
cb8f51bd | 609 | #endif /* CONFIG_PM_ADVANCED_DEBUG */ |
1da177e4 LT |
610 | NULL, |
611 | }; | |
dbb1d8b7 | 612 | static const struct attribute_group pm_attr_group = { |
7490e442 | 613 | .name = power_group_name, |
1da177e4 LT |
614 | .attrs = power_attrs, |
615 | }; | |
616 | ||
cb8f51bd RW |
617 | static struct attribute *wakeup_attrs[] = { |
618 | #ifdef CONFIG_PM_SLEEP | |
619 | &dev_attr_wakeup.attr, | |
620 | &dev_attr_wakeup_count.attr, | |
621 | &dev_attr_wakeup_active_count.attr, | |
30e3ce6d RW |
622 | &dev_attr_wakeup_abort_count.attr, |
623 | &dev_attr_wakeup_expire_count.attr, | |
cb8f51bd RW |
624 | &dev_attr_wakeup_active.attr, |
625 | &dev_attr_wakeup_total_time_ms.attr, | |
626 | &dev_attr_wakeup_max_time_ms.attr, | |
627 | &dev_attr_wakeup_last_time_ms.attr, | |
55850945 RW |
628 | #ifdef CONFIG_PM_AUTOSLEEP |
629 | &dev_attr_wakeup_prevent_sleep_time_ms.attr, | |
630 | #endif | |
cb8f51bd RW |
631 | #endif |
632 | NULL, | |
633 | }; | |
dbb1d8b7 | 634 | static const struct attribute_group pm_wakeup_attr_group = { |
cb8f51bd RW |
635 | .name = power_group_name, |
636 | .attrs = wakeup_attrs, | |
637 | }; | |
7490e442 AS |
638 | |
639 | static struct attribute *runtime_attrs[] = { | |
640 | #ifndef CONFIG_PM_ADVANCED_DEBUG | |
641 | &dev_attr_runtime_status.attr, | |
642 | #endif | |
643 | &dev_attr_control.attr, | |
644 | &dev_attr_runtime_suspended_time.attr, | |
645 | &dev_attr_runtime_active_time.attr, | |
15bcb91d | 646 | &dev_attr_autosuspend_delay_ms.attr, |
7490e442 AS |
647 | NULL, |
648 | }; | |
dbb1d8b7 | 649 | static const struct attribute_group pm_runtime_attr_group = { |
7490e442 AS |
650 | .name = power_group_name, |
651 | .attrs = runtime_attrs, | |
652 | }; | |
653 | ||
b02f6695 | 654 | static struct attribute *pm_qos_resume_latency_attrs[] = { |
85dc0b8a | 655 | &dev_attr_pm_qos_resume_latency_us.attr, |
85dc0b8a RW |
656 | NULL, |
657 | }; | |
dbb1d8b7 | 658 | static const struct attribute_group pm_qos_resume_latency_attr_group = { |
85dc0b8a | 659 | .name = power_group_name, |
b02f6695 | 660 | .attrs = pm_qos_resume_latency_attrs, |
e39473d0 RW |
661 | }; |
662 | ||
2d984ad1 | 663 | static struct attribute *pm_qos_latency_tolerance_attrs[] = { |
2d984ad1 | 664 | &dev_attr_pm_qos_latency_tolerance_us.attr, |
2d984ad1 RW |
665 | NULL, |
666 | }; | |
dbb1d8b7 | 667 | static const struct attribute_group pm_qos_latency_tolerance_attr_group = { |
2d984ad1 RW |
668 | .name = power_group_name, |
669 | .attrs = pm_qos_latency_tolerance_attrs, | |
670 | }; | |
671 | ||
e39473d0 | 672 | static struct attribute *pm_qos_flags_attrs[] = { |
e39473d0 RW |
673 | &dev_attr_pm_qos_no_power_off.attr, |
674 | &dev_attr_pm_qos_remote_wakeup.attr, | |
e39473d0 RW |
675 | NULL, |
676 | }; | |
dbb1d8b7 | 677 | static const struct attribute_group pm_qos_flags_attr_group = { |
e39473d0 RW |
678 | .name = power_group_name, |
679 | .attrs = pm_qos_flags_attrs, | |
85dc0b8a RW |
680 | }; |
681 | ||
7490e442 AS |
682 | int dpm_sysfs_add(struct device *dev) |
683 | { | |
684 | int rc; | |
685 | ||
686 | rc = sysfs_create_group(&dev->kobj, &pm_attr_group); | |
cb8f51bd RW |
687 | if (rc) |
688 | return rc; | |
689 | ||
690 | if (pm_runtime_callbacks_present(dev)) { | |
7490e442 AS |
691 | rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group); |
692 | if (rc) | |
cb8f51bd RW |
693 | goto err_out; |
694 | } | |
cb8f51bd RW |
695 | if (device_can_wakeup(dev)) { |
696 | rc = sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group); | |
2d984ad1 RW |
697 | if (rc) |
698 | goto err_runtime; | |
699 | } | |
700 | if (dev->power.set_latency_tolerance) { | |
701 | rc = sysfs_merge_group(&dev->kobj, | |
702 | &pm_qos_latency_tolerance_attr_group); | |
703 | if (rc) | |
704 | goto err_wakeup; | |
7490e442 | 705 | } |
cb8f51bd RW |
706 | return 0; |
707 | ||
2d984ad1 RW |
708 | err_wakeup: |
709 | sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); | |
710 | err_runtime: | |
711 | sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group); | |
cb8f51bd RW |
712 | err_out: |
713 | sysfs_remove_group(&dev->kobj, &pm_attr_group); | |
7490e442 AS |
714 | return rc; |
715 | } | |
716 | ||
cb8f51bd | 717 | int wakeup_sysfs_add(struct device *dev) |
7490e442 | 718 | { |
cb8f51bd | 719 | return sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group); |
7490e442 AS |
720 | } |
721 | ||
cb8f51bd | 722 | void wakeup_sysfs_remove(struct device *dev) |
7490e442 | 723 | { |
cb8f51bd | 724 | sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); |
7490e442 AS |
725 | } |
726 | ||
b02f6695 | 727 | int pm_qos_sysfs_add_resume_latency(struct device *dev) |
e39473d0 | 728 | { |
b02f6695 | 729 | return sysfs_merge_group(&dev->kobj, &pm_qos_resume_latency_attr_group); |
e39473d0 RW |
730 | } |
731 | ||
b02f6695 | 732 | void pm_qos_sysfs_remove_resume_latency(struct device *dev) |
e39473d0 | 733 | { |
b02f6695 | 734 | sysfs_unmerge_group(&dev->kobj, &pm_qos_resume_latency_attr_group); |
e39473d0 RW |
735 | } |
736 | ||
737 | int pm_qos_sysfs_add_flags(struct device *dev) | |
85dc0b8a | 738 | { |
e39473d0 | 739 | return sysfs_merge_group(&dev->kobj, &pm_qos_flags_attr_group); |
85dc0b8a RW |
740 | } |
741 | ||
e39473d0 | 742 | void pm_qos_sysfs_remove_flags(struct device *dev) |
85dc0b8a | 743 | { |
e39473d0 | 744 | sysfs_unmerge_group(&dev->kobj, &pm_qos_flags_attr_group); |
85dc0b8a RW |
745 | } |
746 | ||
13b2c4a0 MW |
747 | int pm_qos_sysfs_add_latency_tolerance(struct device *dev) |
748 | { | |
749 | return sysfs_merge_group(&dev->kobj, | |
750 | &pm_qos_latency_tolerance_attr_group); | |
751 | } | |
752 | ||
753 | void pm_qos_sysfs_remove_latency_tolerance(struct device *dev) | |
754 | { | |
755 | sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group); | |
756 | } | |
757 | ||
cb8f51bd | 758 | void rpm_sysfs_remove(struct device *dev) |
1da177e4 | 759 | { |
cb8f51bd | 760 | sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group); |
1da177e4 LT |
761 | } |
762 | ||
cb8f51bd | 763 | void dpm_sysfs_remove(struct device *dev) |
1da177e4 | 764 | { |
2d984ad1 | 765 | sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group); |
37530f2b | 766 | dev_pm_qos_constraints_destroy(dev); |
cb8f51bd RW |
767 | rpm_sysfs_remove(dev); |
768 | sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); | |
1da177e4 LT |
769 | sysfs_remove_group(&dev->kobj, &pm_attr_group); |
770 | } |