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Diffstat (limited to 'Documentation/power/devices.txt')
-rw-r--r-- | Documentation/power/devices.txt | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/Documentation/power/devices.txt b/Documentation/power/devices.txt index 5d4ae9a39f1d..f987afe43e28 100644 --- a/Documentation/power/devices.txt +++ b/Documentation/power/devices.txt | |||
@@ -207,27 +207,6 @@ SYSTEM_SHUTDOWN, I do not understand this one too much. probably event | |||
207 | #READY_AFTER_RESUME | 207 | #READY_AFTER_RESUME |
208 | # | 208 | # |
209 | 209 | ||
210 | Driver Detach Power Management | ||
211 | |||
212 | The kernel now supports the ability to place a device in a low-power | ||
213 | state when it is detached from its driver, which happens when its | ||
214 | module is removed. | ||
215 | |||
216 | Each device contains a 'detach_state' file in its sysfs directory | ||
217 | which can be used to control this state. Reading from this file | ||
218 | displays what the current detach state is set to. This is 0 (On) by | ||
219 | default. A user may write a positive integer value to this file in the | ||
220 | range of 1-4 inclusive. | ||
221 | |||
222 | A value of 1-3 will indicate the device should be placed in that | ||
223 | low-power state, which will cause ->suspend() to be called for that | ||
224 | device. A value of 4 indicates that the device should be shutdown, so | ||
225 | ->shutdown() will be called for that device. | ||
226 | |||
227 | The driver is responsible for reinitializing the device when the | ||
228 | module is re-inserted during it's ->probe() (or equivalent) method. | ||
229 | The driver core will not call any extra functions when binding the | ||
230 | device to the driver. | ||
231 | 210 | ||
232 | pm_message_t meaning | 211 | pm_message_t meaning |
233 | 212 | ||