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> |
Paul Gortmaker | 1b6bc32 | 2011-05-27 07:12:15 -0400 | [diff] [blame] | 7 | #include <linux/export.h> |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 8 | #include <linux/pm_qos.h> |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 9 | #include <linux/pm_runtime.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 10 | #include <linux/atomic.h> |
Arjan van de Ven | 8d4b9d1 | 2010-07-19 02:01:06 +0200 | [diff] [blame] | 11 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include "power.h" |
| 13 | |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 14 | /* |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 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 | * |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 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. |
Rafael J. Wysocki | 5a2eb85 | 2010-01-23 22:25:23 +0100 | [diff] [blame] | 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. |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 79 | * |
Alan Stern | 15bcb91d | 2010-09-25 23:35:21 +0200 | [diff] [blame] | 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 | * |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 92 | * wakeup_count - Report the number of wakeup events related to the device |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 93 | */ |
| 94 | |
| 95 | static const char enabled[] = "enabled"; |
| 96 | static const char disabled[] = "disabled"; |
| 97 | |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 98 | const char power_group_name[] = "power"; |
| 99 | EXPORT_SYMBOL_GPL(power_group_name); |
| 100 | |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 101 | #ifdef CONFIG_PM_RUNTIME |
| 102 | static const char ctrl_auto[] = "auto"; |
| 103 | static const char ctrl_on[] = "on"; |
| 104 | |
| 105 | static 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 | |
| 112 | static 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 Stern | 69c843b | 2011-07-06 10:52:23 +0200 | [diff] [blame] | 121 | device_lock(dev); |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 122 | 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 Stern | 69c843b | 2011-07-06 10:52:23 +0200 | [diff] [blame] | 127 | n = -EINVAL; |
| 128 | device_unlock(dev); |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 129 | return n; |
| 130 | } |
| 131 | |
| 132 | static DEVICE_ATTR(control, 0644, control_show, control_store); |
Alan Stern | 0fcb4ee | 2010-07-08 00:05:37 +0200 | [diff] [blame] | 133 | |
Arjan van de Ven | 8d4b9d1 | 2010-07-19 02:01:06 +0200 | [diff] [blame] | 134 | static 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 | |
| 145 | static DEVICE_ATTR(runtime_active_time, 0444, rtpm_active_time_show, NULL); |
| 146 | |
| 147 | static 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 | |
| 159 | static DEVICE_ATTR(runtime_suspended_time, 0444, rtpm_suspended_time_show, NULL); |
| 160 | |
Alan Stern | 0fcb4ee | 2010-07-08 00:05:37 +0200 | [diff] [blame] | 161 | static 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 | |
| 191 | static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL); |
Alan Stern | 15bcb91d | 2010-09-25 23:35:21 +0200 | [diff] [blame] | 192 | |
| 193 | static 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 | |
| 201 | static 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 | |
Jingoo Han | 34da5e6 | 2013-07-26 13:10:22 +0900 | [diff] [blame] | 209 | if (kstrtol(buf, 10, &delay) != 0 || delay != (int) delay) |
Alan Stern | 15bcb91d | 2010-09-25 23:35:21 +0200 | [diff] [blame] | 210 | return -EINVAL; |
| 211 | |
Alan Stern | 69c843b | 2011-07-06 10:52:23 +0200 | [diff] [blame] | 212 | device_lock(dev); |
Alan Stern | 15bcb91d | 2010-09-25 23:35:21 +0200 | [diff] [blame] | 213 | pm_runtime_set_autosuspend_delay(dev, delay); |
Alan Stern | 69c843b | 2011-07-06 10:52:23 +0200 | [diff] [blame] | 214 | device_unlock(dev); |
Alan Stern | 15bcb91d | 2010-09-25 23:35:21 +0200 | [diff] [blame] | 215 | return n; |
| 216 | } |
| 217 | |
| 218 | static DEVICE_ATTR(autosuspend_delay_ms, 0644, autosuspend_delay_ms_show, |
| 219 | autosuspend_delay_ms_store); |
| 220 | |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 221 | static ssize_t pm_qos_resume_latency_show(struct device *dev, |
| 222 | struct device_attribute *attr, |
| 223 | char *buf) |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 224 | { |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 225 | return sprintf(buf, "%d\n", dev_pm_qos_requested_resume_latency(dev)); |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 226 | } |
| 227 | |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 228 | static ssize_t pm_qos_resume_latency_store(struct device *dev, |
| 229 | struct device_attribute *attr, |
| 230 | const char *buf, size_t n) |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 231 | { |
| 232 | s32 value; |
| 233 | int ret; |
| 234 | |
| 235 | if (kstrtos32(buf, 0, &value)) |
| 236 | return -EINVAL; |
| 237 | |
| 238 | if (value < 0) |
| 239 | return -EINVAL; |
| 240 | |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 241 | ret = dev_pm_qos_update_request(dev->power.qos->resume_latency_req, |
| 242 | value); |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 243 | return ret < 0 ? ret : n; |
| 244 | } |
| 245 | |
| 246 | static DEVICE_ATTR(pm_qos_resume_latency_us, 0644, |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 247 | pm_qos_resume_latency_show, pm_qos_resume_latency_store); |
Rafael J. Wysocki | e39473d | 2012-10-24 02:08:18 +0200 | [diff] [blame] | 248 | |
| 249 | static ssize_t pm_qos_no_power_off_show(struct device *dev, |
| 250 | struct device_attribute *attr, |
| 251 | char *buf) |
| 252 | { |
| 253 | return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev) |
| 254 | & PM_QOS_FLAG_NO_POWER_OFF)); |
| 255 | } |
| 256 | |
| 257 | static ssize_t pm_qos_no_power_off_store(struct device *dev, |
| 258 | struct device_attribute *attr, |
| 259 | const char *buf, size_t n) |
| 260 | { |
| 261 | int ret; |
| 262 | |
| 263 | if (kstrtoint(buf, 0, &ret)) |
| 264 | return -EINVAL; |
| 265 | |
| 266 | if (ret != 0 && ret != 1) |
| 267 | return -EINVAL; |
| 268 | |
| 269 | ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_NO_POWER_OFF, ret); |
| 270 | return ret < 0 ? ret : n; |
| 271 | } |
| 272 | |
| 273 | static DEVICE_ATTR(pm_qos_no_power_off, 0644, |
| 274 | pm_qos_no_power_off_show, pm_qos_no_power_off_store); |
| 275 | |
| 276 | static ssize_t pm_qos_remote_wakeup_show(struct device *dev, |
| 277 | struct device_attribute *attr, |
| 278 | char *buf) |
| 279 | { |
| 280 | return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev) |
| 281 | & PM_QOS_FLAG_REMOTE_WAKEUP)); |
| 282 | } |
| 283 | |
| 284 | static ssize_t pm_qos_remote_wakeup_store(struct device *dev, |
| 285 | struct device_attribute *attr, |
| 286 | const char *buf, size_t n) |
| 287 | { |
| 288 | int ret; |
| 289 | |
| 290 | if (kstrtoint(buf, 0, &ret)) |
| 291 | return -EINVAL; |
| 292 | |
| 293 | if (ret != 0 && ret != 1) |
| 294 | return -EINVAL; |
| 295 | |
| 296 | ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP, ret); |
| 297 | return ret < 0 ? ret : n; |
| 298 | } |
| 299 | |
| 300 | static DEVICE_ATTR(pm_qos_remote_wakeup, 0644, |
| 301 | pm_qos_remote_wakeup_show, pm_qos_remote_wakeup_store); |
Rafael J. Wysocki | e762318 | 2011-05-07 18:11:52 +0200 | [diff] [blame] | 302 | #endif /* CONFIG_PM_RUNTIME */ |
Rafael J. Wysocki | 5382363 | 2010-01-23 22:02:51 +0100 | [diff] [blame] | 303 | |
Rafael J. Wysocki | e762318 | 2011-05-07 18:11:52 +0200 | [diff] [blame] | 304 | #ifdef CONFIG_PM_SLEEP |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 305 | static ssize_t |
| 306 | wake_show(struct device * dev, struct device_attribute *attr, char * buf) |
| 307 | { |
| 308 | return sprintf(buf, "%s\n", device_can_wakeup(dev) |
| 309 | ? (device_may_wakeup(dev) ? enabled : disabled) |
| 310 | : ""); |
| 311 | } |
| 312 | |
| 313 | static ssize_t |
| 314 | wake_store(struct device * dev, struct device_attribute *attr, |
| 315 | const char * buf, size_t n) |
| 316 | { |
| 317 | char *cp; |
| 318 | int len = n; |
| 319 | |
| 320 | if (!device_can_wakeup(dev)) |
| 321 | return -EINVAL; |
| 322 | |
| 323 | cp = memchr(buf, '\n', n); |
| 324 | if (cp) |
| 325 | len = cp - buf; |
| 326 | if (len == sizeof enabled - 1 |
| 327 | && strncmp(buf, enabled, sizeof enabled - 1) == 0) |
| 328 | device_set_wakeup_enable(dev, 1); |
| 329 | else if (len == sizeof disabled - 1 |
| 330 | && strncmp(buf, disabled, sizeof disabled - 1) == 0) |
| 331 | device_set_wakeup_enable(dev, 0); |
| 332 | else |
| 333 | return -EINVAL; |
| 334 | return n; |
| 335 | } |
| 336 | |
| 337 | static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store); |
| 338 | |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 339 | static ssize_t wakeup_count_show(struct device *dev, |
| 340 | struct device_attribute *attr, char *buf) |
| 341 | { |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 342 | unsigned long count = 0; |
| 343 | bool enabled = false; |
| 344 | |
| 345 | spin_lock_irq(&dev->power.lock); |
| 346 | if (dev->power.wakeup) { |
| 347 | count = dev->power.wakeup->event_count; |
| 348 | enabled = true; |
| 349 | } |
| 350 | spin_unlock_irq(&dev->power.lock); |
| 351 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | static DEVICE_ATTR(wakeup_count, 0444, wakeup_count_show, NULL); |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 355 | |
| 356 | static ssize_t wakeup_active_count_show(struct device *dev, |
| 357 | struct device_attribute *attr, char *buf) |
| 358 | { |
| 359 | unsigned long count = 0; |
| 360 | bool enabled = false; |
| 361 | |
| 362 | spin_lock_irq(&dev->power.lock); |
| 363 | if (dev->power.wakeup) { |
| 364 | count = dev->power.wakeup->active_count; |
| 365 | enabled = true; |
| 366 | } |
| 367 | spin_unlock_irq(&dev->power.lock); |
| 368 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); |
| 369 | } |
| 370 | |
| 371 | static DEVICE_ATTR(wakeup_active_count, 0444, wakeup_active_count_show, NULL); |
| 372 | |
Rafael J. Wysocki | 30e3ce6 | 2012-04-29 22:52:52 +0200 | [diff] [blame] | 373 | static ssize_t wakeup_abort_count_show(struct device *dev, |
| 374 | struct device_attribute *attr, |
| 375 | char *buf) |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 376 | { |
| 377 | unsigned long count = 0; |
| 378 | bool enabled = false; |
| 379 | |
| 380 | spin_lock_irq(&dev->power.lock); |
| 381 | if (dev->power.wakeup) { |
Rafael J. Wysocki | 30e3ce6 | 2012-04-29 22:52:52 +0200 | [diff] [blame] | 382 | count = dev->power.wakeup->wakeup_count; |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 383 | enabled = true; |
| 384 | } |
| 385 | spin_unlock_irq(&dev->power.lock); |
| 386 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); |
| 387 | } |
| 388 | |
Rafael J. Wysocki | 30e3ce6 | 2012-04-29 22:52:52 +0200 | [diff] [blame] | 389 | static DEVICE_ATTR(wakeup_abort_count, 0444, wakeup_abort_count_show, NULL); |
| 390 | |
| 391 | static ssize_t wakeup_expire_count_show(struct device *dev, |
| 392 | struct device_attribute *attr, |
| 393 | char *buf) |
| 394 | { |
| 395 | unsigned long count = 0; |
| 396 | bool enabled = false; |
| 397 | |
| 398 | spin_lock_irq(&dev->power.lock); |
| 399 | if (dev->power.wakeup) { |
| 400 | count = dev->power.wakeup->expire_count; |
| 401 | enabled = true; |
| 402 | } |
| 403 | spin_unlock_irq(&dev->power.lock); |
| 404 | return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); |
| 405 | } |
| 406 | |
| 407 | static DEVICE_ATTR(wakeup_expire_count, 0444, wakeup_expire_count_show, NULL); |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 408 | |
| 409 | static ssize_t wakeup_active_show(struct device *dev, |
| 410 | struct device_attribute *attr, char *buf) |
| 411 | { |
| 412 | unsigned int active = 0; |
| 413 | bool enabled = false; |
| 414 | |
| 415 | spin_lock_irq(&dev->power.lock); |
| 416 | if (dev->power.wakeup) { |
| 417 | active = dev->power.wakeup->active; |
| 418 | enabled = true; |
| 419 | } |
| 420 | spin_unlock_irq(&dev->power.lock); |
| 421 | return enabled ? sprintf(buf, "%u\n", active) : sprintf(buf, "\n"); |
| 422 | } |
| 423 | |
| 424 | static DEVICE_ATTR(wakeup_active, 0444, wakeup_active_show, NULL); |
| 425 | |
| 426 | static ssize_t wakeup_total_time_show(struct device *dev, |
| 427 | struct device_attribute *attr, char *buf) |
| 428 | { |
| 429 | s64 msec = 0; |
| 430 | bool enabled = false; |
| 431 | |
| 432 | spin_lock_irq(&dev->power.lock); |
| 433 | if (dev->power.wakeup) { |
| 434 | msec = ktime_to_ms(dev->power.wakeup->total_time); |
| 435 | enabled = true; |
| 436 | } |
| 437 | spin_unlock_irq(&dev->power.lock); |
| 438 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); |
| 439 | } |
| 440 | |
| 441 | static DEVICE_ATTR(wakeup_total_time_ms, 0444, wakeup_total_time_show, NULL); |
| 442 | |
| 443 | static ssize_t wakeup_max_time_show(struct device *dev, |
| 444 | struct device_attribute *attr, char *buf) |
| 445 | { |
| 446 | s64 msec = 0; |
| 447 | bool enabled = false; |
| 448 | |
| 449 | spin_lock_irq(&dev->power.lock); |
| 450 | if (dev->power.wakeup) { |
| 451 | msec = ktime_to_ms(dev->power.wakeup->max_time); |
| 452 | enabled = true; |
| 453 | } |
| 454 | spin_unlock_irq(&dev->power.lock); |
| 455 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); |
| 456 | } |
| 457 | |
| 458 | static DEVICE_ATTR(wakeup_max_time_ms, 0444, wakeup_max_time_show, NULL); |
| 459 | |
| 460 | static ssize_t wakeup_last_time_show(struct device *dev, |
| 461 | struct device_attribute *attr, char *buf) |
| 462 | { |
| 463 | s64 msec = 0; |
| 464 | bool enabled = false; |
| 465 | |
| 466 | spin_lock_irq(&dev->power.lock); |
| 467 | if (dev->power.wakeup) { |
| 468 | msec = ktime_to_ms(dev->power.wakeup->last_time); |
| 469 | enabled = true; |
| 470 | } |
| 471 | spin_unlock_irq(&dev->power.lock); |
| 472 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); |
| 473 | } |
| 474 | |
| 475 | static DEVICE_ATTR(wakeup_last_time_ms, 0444, wakeup_last_time_show, NULL); |
Rafael J. Wysocki | 5585094 | 2012-04-29 22:53:32 +0200 | [diff] [blame] | 476 | |
| 477 | #ifdef CONFIG_PM_AUTOSLEEP |
| 478 | static ssize_t wakeup_prevent_sleep_time_show(struct device *dev, |
| 479 | struct device_attribute *attr, |
| 480 | char *buf) |
| 481 | { |
| 482 | s64 msec = 0; |
| 483 | bool enabled = false; |
| 484 | |
| 485 | spin_lock_irq(&dev->power.lock); |
| 486 | if (dev->power.wakeup) { |
| 487 | msec = ktime_to_ms(dev->power.wakeup->prevent_sleep_time); |
| 488 | enabled = true; |
| 489 | } |
| 490 | spin_unlock_irq(&dev->power.lock); |
| 491 | return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); |
| 492 | } |
| 493 | |
| 494 | static DEVICE_ATTR(wakeup_prevent_sleep_time_ms, 0444, |
| 495 | wakeup_prevent_sleep_time_show, NULL); |
| 496 | #endif /* CONFIG_PM_AUTOSLEEP */ |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 497 | #endif /* CONFIG_PM_SLEEP */ |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 498 | |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 499 | #ifdef CONFIG_PM_ADVANCED_DEBUG |
| 500 | #ifdef CONFIG_PM_RUNTIME |
| 501 | |
| 502 | static ssize_t rtpm_usagecount_show(struct device *dev, |
| 503 | struct device_attribute *attr, char *buf) |
| 504 | { |
| 505 | return sprintf(buf, "%d\n", atomic_read(&dev->power.usage_count)); |
| 506 | } |
| 507 | |
| 508 | static ssize_t rtpm_children_show(struct device *dev, |
| 509 | struct device_attribute *attr, char *buf) |
| 510 | { |
| 511 | return sprintf(buf, "%d\n", dev->power.ignore_children ? |
| 512 | 0 : atomic_read(&dev->power.child_count)); |
| 513 | } |
| 514 | |
| 515 | static ssize_t rtpm_enabled_show(struct device *dev, |
| 516 | struct device_attribute *attr, char *buf) |
| 517 | { |
| 518 | if ((dev->power.disable_depth) && (dev->power.runtime_auto == false)) |
| 519 | return sprintf(buf, "disabled & forbidden\n"); |
| 520 | else if (dev->power.disable_depth) |
| 521 | return sprintf(buf, "disabled\n"); |
| 522 | else if (dev->power.runtime_auto == false) |
| 523 | return sprintf(buf, "forbidden\n"); |
| 524 | return sprintf(buf, "enabled\n"); |
| 525 | } |
| 526 | |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 527 | static DEVICE_ATTR(runtime_usage, 0444, rtpm_usagecount_show, NULL); |
| 528 | static DEVICE_ATTR(runtime_active_kids, 0444, rtpm_children_show, NULL); |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 529 | static DEVICE_ATTR(runtime_enabled, 0444, rtpm_enabled_show, NULL); |
| 530 | |
| 531 | #endif |
| 532 | |
Rafael J. Wysocki | d181b49 | 2012-07-11 22:42:58 +0200 | [diff] [blame] | 533 | #ifdef CONFIG_PM_SLEEP |
| 534 | |
Rafael J. Wysocki | 5a2eb85 | 2010-01-23 22:25:23 +0100 | [diff] [blame] | 535 | static ssize_t async_show(struct device *dev, struct device_attribute *attr, |
| 536 | char *buf) |
| 537 | { |
| 538 | return sprintf(buf, "%s\n", |
| 539 | device_async_suspend_enabled(dev) ? enabled : disabled); |
| 540 | } |
| 541 | |
| 542 | static ssize_t async_store(struct device *dev, struct device_attribute *attr, |
| 543 | const char *buf, size_t n) |
| 544 | { |
| 545 | char *cp; |
| 546 | int len = n; |
| 547 | |
| 548 | cp = memchr(buf, '\n', n); |
| 549 | if (cp) |
| 550 | len = cp - buf; |
| 551 | if (len == sizeof enabled - 1 && strncmp(buf, enabled, len) == 0) |
| 552 | device_enable_async_suspend(dev); |
| 553 | else if (len == sizeof disabled - 1 && strncmp(buf, disabled, len) == 0) |
| 554 | device_disable_async_suspend(dev); |
| 555 | else |
| 556 | return -EINVAL; |
| 557 | return n; |
| 558 | } |
| 559 | |
| 560 | static DEVICE_ATTR(async, 0644, async_show, async_store); |
Rafael J. Wysocki | d181b49 | 2012-07-11 22:42:58 +0200 | [diff] [blame] | 561 | |
| 562 | #endif |
Dominik Brodowski | c92445f | 2010-04-23 20:32:23 +0200 | [diff] [blame] | 563 | #endif /* CONFIG_PM_ADVANCED_DEBUG */ |
David Brownell | 0ac8524 | 2005-09-12 19:39:34 -0700 | [diff] [blame] | 564 | |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 565 | static struct attribute *power_attrs[] = { |
| 566 | #ifdef CONFIG_PM_ADVANCED_DEBUG |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 567 | #ifdef CONFIG_PM_SLEEP |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 568 | &dev_attr_async.attr, |
| 569 | #endif |
| 570 | #ifdef CONFIG_PM_RUNTIME |
| 571 | &dev_attr_runtime_status.attr, |
| 572 | &dev_attr_runtime_usage.attr, |
| 573 | &dev_attr_runtime_active_kids.attr, |
| 574 | &dev_attr_runtime_enabled.attr, |
| 575 | #endif |
| 576 | #endif /* CONFIG_PM_ADVANCED_DEBUG */ |
| 577 | NULL, |
| 578 | }; |
| 579 | static struct attribute_group pm_attr_group = { |
| 580 | .name = power_group_name, |
| 581 | .attrs = power_attrs, |
| 582 | }; |
| 583 | |
| 584 | static struct attribute *wakeup_attrs[] = { |
| 585 | #ifdef CONFIG_PM_SLEEP |
| 586 | &dev_attr_wakeup.attr, |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 587 | &dev_attr_wakeup_count.attr, |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 588 | &dev_attr_wakeup_active_count.attr, |
Rafael J. Wysocki | 30e3ce6 | 2012-04-29 22:52:52 +0200 | [diff] [blame] | 589 | &dev_attr_wakeup_abort_count.attr, |
| 590 | &dev_attr_wakeup_expire_count.attr, |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 591 | &dev_attr_wakeup_active.attr, |
| 592 | &dev_attr_wakeup_total_time_ms.attr, |
| 593 | &dev_attr_wakeup_max_time_ms.attr, |
| 594 | &dev_attr_wakeup_last_time_ms.attr, |
Rafael J. Wysocki | 5585094 | 2012-04-29 22:53:32 +0200 | [diff] [blame] | 595 | #ifdef CONFIG_PM_AUTOSLEEP |
| 596 | &dev_attr_wakeup_prevent_sleep_time_ms.attr, |
| 597 | #endif |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 598 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | NULL, |
| 600 | }; |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 601 | static struct attribute_group pm_wakeup_attr_group = { |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 602 | .name = power_group_name, |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 603 | .attrs = wakeup_attrs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | }; |
| 605 | |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 606 | static struct attribute *runtime_attrs[] = { |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 607 | #ifdef CONFIG_PM_RUNTIME |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 608 | #ifndef CONFIG_PM_ADVANCED_DEBUG |
| 609 | &dev_attr_runtime_status.attr, |
| 610 | #endif |
| 611 | &dev_attr_control.attr, |
| 612 | &dev_attr_runtime_suspended_time.attr, |
| 613 | &dev_attr_runtime_active_time.attr, |
Alan Stern | 15bcb91d | 2010-09-25 23:35:21 +0200 | [diff] [blame] | 614 | &dev_attr_autosuspend_delay_ms.attr, |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 615 | #endif /* CONFIG_PM_RUNTIME */ |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 616 | NULL, |
| 617 | }; |
| 618 | static struct attribute_group pm_runtime_attr_group = { |
| 619 | .name = power_group_name, |
| 620 | .attrs = runtime_attrs, |
| 621 | }; |
| 622 | |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 623 | static struct attribute *pm_qos_resume_latency_attrs[] = { |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 624 | #ifdef CONFIG_PM_RUNTIME |
| 625 | &dev_attr_pm_qos_resume_latency_us.attr, |
| 626 | #endif /* CONFIG_PM_RUNTIME */ |
| 627 | NULL, |
| 628 | }; |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 629 | static struct attribute_group pm_qos_resume_latency_attr_group = { |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 630 | .name = power_group_name, |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 631 | .attrs = pm_qos_resume_latency_attrs, |
Rafael J. Wysocki | e39473d | 2012-10-24 02:08:18 +0200 | [diff] [blame] | 632 | }; |
| 633 | |
| 634 | static struct attribute *pm_qos_flags_attrs[] = { |
| 635 | #ifdef CONFIG_PM_RUNTIME |
| 636 | &dev_attr_pm_qos_no_power_off.attr, |
| 637 | &dev_attr_pm_qos_remote_wakeup.attr, |
| 638 | #endif /* CONFIG_PM_RUNTIME */ |
| 639 | NULL, |
| 640 | }; |
| 641 | static struct attribute_group pm_qos_flags_attr_group = { |
| 642 | .name = power_group_name, |
| 643 | .attrs = pm_qos_flags_attrs, |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 644 | }; |
| 645 | |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 646 | int dpm_sysfs_add(struct device *dev) |
| 647 | { |
| 648 | int rc; |
| 649 | |
| 650 | rc = sysfs_create_group(&dev->kobj, &pm_attr_group); |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 651 | if (rc) |
| 652 | return rc; |
| 653 | |
| 654 | if (pm_runtime_callbacks_present(dev)) { |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 655 | rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group); |
| 656 | if (rc) |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 657 | goto err_out; |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 658 | } |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 659 | |
| 660 | if (device_can_wakeup(dev)) { |
| 661 | rc = sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group); |
| 662 | if (rc) { |
| 663 | if (pm_runtime_callbacks_present(dev)) |
| 664 | sysfs_unmerge_group(&dev->kobj, |
| 665 | &pm_runtime_attr_group); |
| 666 | goto err_out; |
| 667 | } |
| 668 | } |
| 669 | return 0; |
| 670 | |
| 671 | err_out: |
| 672 | sysfs_remove_group(&dev->kobj, &pm_attr_group); |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 673 | return rc; |
| 674 | } |
| 675 | |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 676 | int wakeup_sysfs_add(struct device *dev) |
| 677 | { |
| 678 | return sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group); |
| 679 | } |
| 680 | |
| 681 | void wakeup_sysfs_remove(struct device *dev) |
| 682 | { |
| 683 | sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); |
| 684 | } |
| 685 | |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 686 | int pm_qos_sysfs_add_resume_latency(struct device *dev) |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 687 | { |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 688 | return sysfs_merge_group(&dev->kobj, &pm_qos_resume_latency_attr_group); |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 689 | } |
| 690 | |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 691 | void pm_qos_sysfs_remove_resume_latency(struct device *dev) |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 692 | { |
Rafael J. Wysocki | b02f669 | 2014-02-11 00:35:23 +0100 | [diff] [blame^] | 693 | sysfs_unmerge_group(&dev->kobj, &pm_qos_resume_latency_attr_group); |
Rafael J. Wysocki | e39473d | 2012-10-24 02:08:18 +0200 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | int pm_qos_sysfs_add_flags(struct device *dev) |
| 697 | { |
| 698 | return sysfs_merge_group(&dev->kobj, &pm_qos_flags_attr_group); |
| 699 | } |
| 700 | |
| 701 | void pm_qos_sysfs_remove_flags(struct device *dev) |
| 702 | { |
| 703 | sysfs_unmerge_group(&dev->kobj, &pm_qos_flags_attr_group); |
Rafael J. Wysocki | 85dc0b8 | 2012-03-13 01:01:39 +0100 | [diff] [blame] | 704 | } |
| 705 | |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 706 | void rpm_sysfs_remove(struct device *dev) |
| 707 | { |
| 708 | sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group); |
| 709 | } |
| 710 | |
| 711 | void dpm_sysfs_remove(struct device *dev) |
| 712 | { |
Rafael J. Wysocki | 37530f2 | 2013-03-04 14:22:57 +0100 | [diff] [blame] | 713 | dev_pm_qos_constraints_destroy(dev); |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 714 | rpm_sysfs_remove(dev); |
Rafael J. Wysocki | cb8f51b | 2011-02-08 23:26:02 +0100 | [diff] [blame] | 715 | sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); |
Alan Stern | 7490e44 | 2010-09-25 23:35:15 +0200 | [diff] [blame] | 716 | sysfs_remove_group(&dev->kobj, &pm_attr_group); |
| 717 | } |