Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/base/power/sysfs.c - sysfs entries for device PM |
| 3 | */ |
| 4 | |
| 5 | #include <linux/device.h> |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 6 | #include <linux/string.h> |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 7 | #include <linux/pm_runtime.h> |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 8 | #include <asm/atomic.h> |
Arjan van de Ven | 8d4b9d1 | 2010-07-19 02:01:06 +0200 | [diff] [blame] | 9 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include "power.h" |
| 11 | |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 12 | /* |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 13 | * control - Report/change current runtime PM setting of the device |
| 14 | * |
| 15 | * Runtime power management of a device can be blocked with the help of |
| 16 | * this attribute. All devices have one of the following two values for |
| 17 | * the power/control file: |
| 18 | * |
| 19 | * + "auto\n" to allow the device to be power managed at run time; |
| 20 | * + "on\n" to prevent the device from being power managed at run time; |
| 21 | * |
| 22 | * The default for all devices is "auto", which means that devices may be |
| 23 | * subject to automatic power management, depending on their drivers. |
| 24 | * Changing this attribute to "on" prevents the driver from power managing |
| 25 | * the device at run time. Doing that while the device is suspended causes |
| 26 | * it to be woken up. |
| 27 | * |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 28 | * wakeup - Report/change current wakeup option for device |
| 29 | * |
| 30 | * Some devices support "wakeup" events, which are hardware signals |
| 31 | * used to activate devices from suspended or low power states. Such |
| 32 | * devices have one of three values for the sysfs power/wakeup file: |
| 33 | * |
| 34 | * + "enabled\n" to issue the events; |
| 35 | * + "disabled\n" not to do so; or |
| 36 | * + "\n" for temporary or permanent inability to issue wakeup. |
| 37 | * |
| 38 | * (For example, unconfigured USB devices can't issue wakeups.) |
| 39 | * |
| 40 | * Familiar examples of devices that can issue wakeup events include |
| 41 | * keyboards and mice (both PS2 and USB styles), power buttons, modems, |
| 42 | * "Wake-On-LAN" Ethernet links, GPIO lines, and more. Some events |
| 43 | * will wake the entire system from a suspend state; others may just |
| 44 | * wake up the device (if the system as a whole is already active). |
| 45 | * Some wakeup events use normal IRQ lines; other use special out |
| 46 | * of band signaling. |
| 47 | * |
| 48 | * It is the responsibility of device drivers to enable (or disable) |
| 49 | * wakeup signaling as part of changing device power states, respecting |
| 50 | * the policy choices provided through the driver model. |
| 51 | * |
| 52 | * Devices may not be able to generate wakeup events from all power |
| 53 | * states. Also, the events may be ignored in some configurations; |
| 54 | * for example, they might need help from other devices that aren't |
| 55 | * active, or which may have wakeup disabled. Some drivers rely on |
| 56 | * wakeup events internally (unless they are disabled), keeping |
| 57 | * their hardware in low power modes whenever they're unused. This |
| 58 | * saves runtime power, without requiring system-wide sleep states. |
Rafael J. Wysocki | 5a2eb85 | 2010-01-23 22:25:23 +0100 | [diff] [blame] | 59 | * |
| 60 | * async - Report/change current async suspend setting for the device |
| 61 | * |
| 62 | * Asynchronous suspend and resume of the device during system-wide power |
| 63 | * state transitions can be enabled by writing "enabled" to this file. |
| 64 | * Analogously, if "disabled" is written to this file, the device will be |
| 65 | * suspended and resumed synchronously. |
| 66 | * |
| 67 | * All devices have one of the following two values for power/async: |
| 68 | * |
| 69 | * + "enabled\n" to permit the asynchronous suspend/resume of the device; |
| 70 | * + "disabled\n" to forbid it; |
| 71 | * |
| 72 | * NOTE: It generally is unsafe to permit the asynchronous suspend/resume |
| 73 | * of a device unless it is certain that all of the PM dependencies of the |
| 74 | * device are known to the PM core. However, for some devices this |
| 75 | * attribute is set to "enabled" by bus type code or device drivers and in |
| 76 | * that cases it should be safe to leave the default value. |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 77 | * |
Alan Stern | 15bcb91d | 2010-09-25 23:35:21 +0200 | [diff] [blame^] | 78 | * autosuspend_delay_ms - Report/change a device's autosuspend_delay value |
| 79 | * |
| 80 | * Some drivers don't want to carry out a runtime suspend as soon as a |
| 81 | * device becomes idle; they want it always to remain idle for some period |
| 82 | * of time before suspending it. This period is the autosuspend_delay |
| 83 | * value (expressed in milliseconds) and it can be controlled by the user. |
| 84 | * If the value is negative then the device will never be runtime |
| 85 | * suspended. |
| 86 | * |
| 87 | * NOTE: The autosuspend_delay_ms attribute and the autosuspend_delay |
| 88 | * value are used only if the driver calls pm_runtime_use_autosuspend(). |
| 89 | * |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 90 | * wakeup_count - Report the number of wakeup events related to the device |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 91 | */ |
| 92 | |
| 93 | static const char enabled[] = "enabled"; |
| 94 | static const char disabled[] = "disabled"; |
| 95 | |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 96 | const char power_group_name[] = "power"; |
| 97 | EXPORT_SYMBOL_GPL(power_group_name); |
| 98 | |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 99 | #ifdef CONFIG_PM_RUNTIME |
| 100 | static const char ctrl_auto[] = "auto"; |
| 101 | static const char ctrl_on[] = "on"; |
| 102 | |
| 103 | static ssize_t control_show(struct device *dev, struct device_attribute *attr, |
| 104 | char *buf) |
| 105 | { |
| 106 | return sprintf(buf, "%s\n", |
| 107 | dev->power.runtime_auto ? ctrl_auto : ctrl_on); |
| 108 | } |
| 109 | |
| 110 | static ssize_t control_store(struct device * dev, struct device_attribute *attr, |
| 111 | const char * buf, size_t n) |
| 112 | { |
| 113 | char *cp; |
| 114 | int len = n; |
| 115 | |
| 116 | cp = memchr(buf, '\n', n); |
| 117 | if (cp) |
| 118 | len = cp - buf; |
| 119 | if (len == sizeof ctrl_auto - 1 && strncmp(buf, ctrl_auto, len) == 0) |
| 120 | pm_runtime_allow(dev); |
| 121 | else if (len == sizeof ctrl_on - 1 && strncmp(buf, ctrl_on, len) == 0) |
| 122 | pm_runtime_forbid(dev); |
| 123 | else |
| 124 | return -EINVAL; |
| 125 | return n; |
| 126 | } |
| 127 | |
| 128 | static DEVICE_ATTR(control, 0644, control_show, control_store); |
Alan Stern | 0fcb4ee | 2010-07-08 00:05:37 +0200 | [diff] [blame] | 129 | |
Arjan van de Ven | 8d4b9d1 | 2010-07-19 02:01:06 +0200 | [diff] [blame] | 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 | |
Alan Stern | 0fcb4ee | 2010-07-08 00:05:37 +0200 | [diff] [blame] | 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); |
Alan Stern | 15bcb91d | 2010-09-25 23:35:21 +0200 | [diff] [blame^] | 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 | |
| 205 | if (strict_strtol(buf, 10, &delay) != 0 || delay != (int) delay) |
| 206 | return -EINVAL; |
| 207 | |
| 208 | pm_runtime_set_autosuspend_delay(dev, delay); |
| 209 | return n; |
| 210 | } |
| 211 | |
| 212 | static DEVICE_ATTR(autosuspend_delay_ms, 0644, autosuspend_delay_ms_show, |
| 213 | autosuspend_delay_ms_store); |
| 214 | |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 215 | #endif |
| 216 | |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 217 | static ssize_t |
| 218 | wake_show(struct device * dev, struct device_attribute *attr, char * buf) |
| 219 | { |
| 220 | return sprintf(buf, "%s\n", device_can_wakeup(dev) |
| 221 | ? (device_may_wakeup(dev) ? enabled : disabled) |
| 222 | : ""); |
| 223 | } |
| 224 | |
| 225 | static ssize_t |
| 226 | wake_store(struct device * dev, struct device_attribute *attr, |
| 227 | const char * buf, size_t n) |
| 228 | { |
| 229 | char *cp; |
| 230 | int len = n; |
| 231 | |
| 232 | if (!device_can_wakeup(dev)) |
| 233 | return -EINVAL; |
| 234 | |
| 235 | cp = memchr(buf, '\n', n); |
| 236 | if (cp) |
| 237 | len = cp - buf; |
| 238 | if (len == sizeof enabled - 1 |
| 239 | && strncmp(buf, enabled, sizeof enabled - 1) == 0) |
| 240 | device_set_wakeup_enable(dev, 1); |
| 241 | else if (len == sizeof disabled - 1 |
| 242 | && strncmp(buf, disabled, sizeof disabled - 1) == 0) |
| 243 | device_set_wakeup_enable(dev, 0); |
| 244 | else |
| 245 | return -EINVAL; |
| 246 | return n; |
| 247 | } |
| 248 | |
| 249 | static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store); |
| 250 | |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 251 | #ifdef CONFIG_PM_SLEEP |
| 252 | static ssize_t wakeup_count_show(struct device *dev, |
| 253 | struct device_attribute *attr, char *buf) |
| 254 | { |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 255 | unsigned long count = 0; |
| 256 | bool enabled = false; |
| 257 | |
| 258 | spin_lock_irq(&dev->power.lock); |
| 259 | if (dev->power.wakeup) { |
| 260 | count = dev->power.wakeup->event_count; |
| 261 | enabled = true; |
| 262 | } |
| 263 | spin_unlock_irq(&dev->power.lock); |
| 264 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | static DEVICE_ATTR(wakeup_count, 0444, wakeup_count_show, NULL); |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 268 | |
| 269 | static ssize_t wakeup_active_count_show(struct device *dev, |
| 270 | struct device_attribute *attr, char *buf) |
| 271 | { |
| 272 | unsigned long count = 0; |
| 273 | bool enabled = false; |
| 274 | |
| 275 | spin_lock_irq(&dev->power.lock); |
| 276 | if (dev->power.wakeup) { |
| 277 | count = dev->power.wakeup->active_count; |
| 278 | enabled = true; |
| 279 | } |
| 280 | spin_unlock_irq(&dev->power.lock); |
| 281 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); |
| 282 | } |
| 283 | |
| 284 | static DEVICE_ATTR(wakeup_active_count, 0444, wakeup_active_count_show, NULL); |
| 285 | |
| 286 | static ssize_t wakeup_hit_count_show(struct device *dev, |
| 287 | struct device_attribute *attr, char *buf) |
| 288 | { |
| 289 | unsigned long count = 0; |
| 290 | bool enabled = false; |
| 291 | |
| 292 | spin_lock_irq(&dev->power.lock); |
| 293 | if (dev->power.wakeup) { |
| 294 | count = dev->power.wakeup->hit_count; |
| 295 | enabled = true; |
| 296 | } |
| 297 | spin_unlock_irq(&dev->power.lock); |
| 298 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); |
| 299 | } |
| 300 | |
| 301 | static DEVICE_ATTR(wakeup_hit_count, 0444, wakeup_hit_count_show, NULL); |
| 302 | |
| 303 | static ssize_t wakeup_active_show(struct device *dev, |
| 304 | struct device_attribute *attr, char *buf) |
| 305 | { |
| 306 | unsigned int active = 0; |
| 307 | bool enabled = false; |
| 308 | |
| 309 | spin_lock_irq(&dev->power.lock); |
| 310 | if (dev->power.wakeup) { |
| 311 | active = dev->power.wakeup->active; |
| 312 | enabled = true; |
| 313 | } |
| 314 | spin_unlock_irq(&dev->power.lock); |
| 315 | return enabled ? sprintf(buf, "%u\n", active) : sprintf(buf, "\n"); |
| 316 | } |
| 317 | |
| 318 | static DEVICE_ATTR(wakeup_active, 0444, wakeup_active_show, NULL); |
| 319 | |
| 320 | static ssize_t wakeup_total_time_show(struct device *dev, |
| 321 | struct device_attribute *attr, char *buf) |
| 322 | { |
| 323 | s64 msec = 0; |
| 324 | bool enabled = false; |
| 325 | |
| 326 | spin_lock_irq(&dev->power.lock); |
| 327 | if (dev->power.wakeup) { |
| 328 | msec = ktime_to_ms(dev->power.wakeup->total_time); |
| 329 | enabled = true; |
| 330 | } |
| 331 | spin_unlock_irq(&dev->power.lock); |
| 332 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); |
| 333 | } |
| 334 | |
| 335 | static DEVICE_ATTR(wakeup_total_time_ms, 0444, wakeup_total_time_show, NULL); |
| 336 | |
| 337 | static ssize_t wakeup_max_time_show(struct device *dev, |
| 338 | struct device_attribute *attr, char *buf) |
| 339 | { |
| 340 | s64 msec = 0; |
| 341 | bool enabled = false; |
| 342 | |
| 343 | spin_lock_irq(&dev->power.lock); |
| 344 | if (dev->power.wakeup) { |
| 345 | msec = ktime_to_ms(dev->power.wakeup->max_time); |
| 346 | enabled = true; |
| 347 | } |
| 348 | spin_unlock_irq(&dev->power.lock); |
| 349 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); |
| 350 | } |
| 351 | |
| 352 | static DEVICE_ATTR(wakeup_max_time_ms, 0444, wakeup_max_time_show, NULL); |
| 353 | |
| 354 | static ssize_t wakeup_last_time_show(struct device *dev, |
| 355 | struct device_attribute *attr, char *buf) |
| 356 | { |
| 357 | s64 msec = 0; |
| 358 | bool enabled = false; |
| 359 | |
| 360 | spin_lock_irq(&dev->power.lock); |
| 361 | if (dev->power.wakeup) { |
| 362 | msec = ktime_to_ms(dev->power.wakeup->last_time); |
| 363 | enabled = true; |
| 364 | } |
| 365 | spin_unlock_irq(&dev->power.lock); |
| 366 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); |
| 367 | } |
| 368 | |
| 369 | static DEVICE_ATTR(wakeup_last_time_ms, 0444, wakeup_last_time_show, NULL); |
| 370 | #endif /* CONFIG_PM_SLEEP */ |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 371 | |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 372 | #ifdef CONFIG_PM_ADVANCED_DEBUG |
| 373 | #ifdef CONFIG_PM_RUNTIME |
| 374 | |
| 375 | static ssize_t rtpm_usagecount_show(struct device *dev, |
| 376 | struct device_attribute *attr, char *buf) |
| 377 | { |
| 378 | return sprintf(buf, "%d\n", atomic_read(&dev->power.usage_count)); |
| 379 | } |
| 380 | |
| 381 | static ssize_t rtpm_children_show(struct device *dev, |
| 382 | struct device_attribute *attr, char *buf) |
| 383 | { |
| 384 | return sprintf(buf, "%d\n", dev->power.ignore_children ? |
| 385 | 0 : atomic_read(&dev->power.child_count)); |
| 386 | } |
| 387 | |
| 388 | static ssize_t rtpm_enabled_show(struct device *dev, |
| 389 | struct device_attribute *attr, char *buf) |
| 390 | { |
| 391 | if ((dev->power.disable_depth) && (dev->power.runtime_auto == false)) |
| 392 | return sprintf(buf, "disabled & forbidden\n"); |
| 393 | else if (dev->power.disable_depth) |
| 394 | return sprintf(buf, "disabled\n"); |
| 395 | else if (dev->power.runtime_auto == false) |
| 396 | return sprintf(buf, "forbidden\n"); |
| 397 | return sprintf(buf, "enabled\n"); |
| 398 | } |
| 399 | |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 400 | static DEVICE_ATTR(runtime_usage, 0444, rtpm_usagecount_show, NULL); |
| 401 | static DEVICE_ATTR(runtime_active_kids, 0444, rtpm_children_show, NULL); |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 402 | static DEVICE_ATTR(runtime_enabled, 0444, rtpm_enabled_show, NULL); |
| 403 | |
| 404 | #endif |
| 405 | |
Rafael J. Wysocki | 5a2eb85 | 2010-01-23 22:25:23 +0100 | [diff] [blame] | 406 | static ssize_t async_show(struct device *dev, struct device_attribute *attr, |
| 407 | char *buf) |
| 408 | { |
| 409 | return sprintf(buf, "%s\n", |
| 410 | device_async_suspend_enabled(dev) ? enabled : disabled); |
| 411 | } |
| 412 | |
| 413 | static ssize_t async_store(struct device *dev, struct device_attribute *attr, |
| 414 | const char *buf, size_t n) |
| 415 | { |
| 416 | char *cp; |
| 417 | int len = n; |
| 418 | |
| 419 | cp = memchr(buf, '\n', n); |
| 420 | if (cp) |
| 421 | len = cp - buf; |
| 422 | if (len == sizeof enabled - 1 && strncmp(buf, enabled, len) == 0) |
| 423 | device_enable_async_suspend(dev); |
| 424 | else if (len == sizeof disabled - 1 && strncmp(buf, disabled, len) == 0) |
| 425 | device_disable_async_suspend(dev); |
| 426 | else |
| 427 | return -EINVAL; |
| 428 | return n; |
| 429 | } |
| 430 | |
| 431 | static DEVICE_ATTR(async, 0644, async_show, async_store); |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 432 | #endif /* CONFIG_PM_ADVANCED_DEBUG */ |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | static struct attribute * power_attrs[] = { |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 435 | &dev_attr_wakeup.attr, |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 436 | #ifdef CONFIG_PM_SLEEP |
| 437 | &dev_attr_wakeup_count.attr, |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 438 | &dev_attr_wakeup_active_count.attr, |
| 439 | &dev_attr_wakeup_hit_count.attr, |
| 440 | &dev_attr_wakeup_active.attr, |
| 441 | &dev_attr_wakeup_total_time_ms.attr, |
| 442 | &dev_attr_wakeup_max_time_ms.attr, |
| 443 | &dev_attr_wakeup_last_time_ms.attr, |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 444 | #endif |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 445 | #ifdef CONFIG_PM_ADVANCED_DEBUG |
Rafael J. Wysocki | 5a2eb85 | 2010-01-23 22:25:23 +0100 | [diff] [blame] | 446 | &dev_attr_async.attr, |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 447 | #ifdef CONFIG_PM_RUNTIME |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 448 | &dev_attr_runtime_status.attr, |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 449 | &dev_attr_runtime_usage.attr, |
| 450 | &dev_attr_runtime_active_kids.attr, |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 451 | &dev_attr_runtime_enabled.attr, |
| 452 | #endif |
Rafael J. Wysocki | 5a2eb85 | 2010-01-23 22:25:23 +0100 | [diff] [blame] | 453 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | NULL, |
| 455 | }; |
| 456 | static struct attribute_group pm_attr_group = { |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 457 | .name = power_group_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | .attrs = power_attrs, |
| 459 | }; |
| 460 | |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 461 | #ifdef CONFIG_PM_RUNTIME |
| 462 | |
| 463 | static struct attribute *runtime_attrs[] = { |
| 464 | #ifndef CONFIG_PM_ADVANCED_DEBUG |
| 465 | &dev_attr_runtime_status.attr, |
| 466 | #endif |
| 467 | &dev_attr_control.attr, |
| 468 | &dev_attr_runtime_suspended_time.attr, |
| 469 | &dev_attr_runtime_active_time.attr, |
Alan Stern | 15bcb91d | 2010-09-25 23:35:21 +0200 | [diff] [blame^] | 470 | &dev_attr_autosuspend_delay_ms.attr, |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 471 | NULL, |
| 472 | }; |
| 473 | static struct attribute_group pm_runtime_attr_group = { |
| 474 | .name = power_group_name, |
| 475 | .attrs = runtime_attrs, |
| 476 | }; |
| 477 | |
| 478 | int dpm_sysfs_add(struct device *dev) |
| 479 | { |
| 480 | int rc; |
| 481 | |
| 482 | rc = sysfs_create_group(&dev->kobj, &pm_attr_group); |
| 483 | if (rc == 0 && !dev->power.no_callbacks) { |
| 484 | rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group); |
| 485 | if (rc) |
| 486 | sysfs_remove_group(&dev->kobj, &pm_attr_group); |
| 487 | } |
| 488 | return rc; |
| 489 | } |
| 490 | |
| 491 | void rpm_sysfs_remove(struct device *dev) |
| 492 | { |
| 493 | sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group); |
| 494 | } |
| 495 | |
| 496 | void dpm_sysfs_remove(struct device *dev) |
| 497 | { |
| 498 | rpm_sysfs_remove(dev); |
| 499 | sysfs_remove_group(&dev->kobj, &pm_attr_group); |
| 500 | } |
| 501 | |
| 502 | #else /* CONFIG_PM_RUNTIME */ |
| 503 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | int dpm_sysfs_add(struct device * dev) |
| 505 | { |
| 506 | return sysfs_create_group(&dev->kobj, &pm_attr_group); |
| 507 | } |
| 508 | |
| 509 | void dpm_sysfs_remove(struct device * dev) |
| 510 | { |
| 511 | sysfs_remove_group(&dev->kobj, &pm_attr_group); |
| 512 | } |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 513 | |
| 514 | #endif |