PM: Remove obsolete /sys/devices/.../power/state docs

The /sys/devices/.../power/state files have been gone for a while
now, but I just noticed some documentation that still refers to
them.  (Fortunately described as DEPRECATED and WILL REMOVE).

Time to remove that obsolete documentation too ...

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/Documentation/power/devices.txt b/Documentation/power/devices.txt
index d0e79d5820a5e7a7237f36a1cb5776ec589552d8..c53d263619194f7e04719e0a7250944b0134d598 100644 (file)
--- a/Documentation/power/devices.txt
+++ b/Documentation/power/devices.txt
@@ -502,52 +502,3 @@ If the CPU can have a "cpufreq" driver, there also may be opportunities
 to shift to lower voltage settings and reduce the power cost of executing
 a given number of instructions.  (Without voltage adjustment, it's rare
 for cpufreq to save much power; the cost-per-instruction must go down.)
-
-
-/sys/devices/.../power/state files
-==================================
-For now you can also test some of this functionality using sysfs.
-
-       DEPRECATED:  USE "power/state" ONLY FOR DRIVER TESTING, AND
-       AVOID USING dev->power.power_state IN DRIVERS.
-
-       THESE WILL BE REMOVED.  IF THE "power/state" FILE GETS REPLACED,
-       IT WILL BECOME SOMETHING COUPLED TO THE BUS OR DRIVER.
-
-In each device's directory, there is a 'power' directory, which contains
-at least a 'state' file.  The value of this field is effectively boolean,
-PM_EVENT_ON or PM_EVENT_SUSPEND.
-
-   *   Reading from this file displays a value corresponding to
-       the power.power_state.event field.  All nonzero values are
-       displayed as "2", corresponding to a low power state; zero
-       is displayed as "0", corresponding to normal operation.
-
-   *   Writing to this file initiates a transition using the
-       specified event code number; only '0', '2', and '3' are
-       accepted (without a newline); '2' and '3' are both
-       mapped to PM_EVENT_SUSPEND.
-
-On writes, the PM core relies on that recorded event code and the device/bus
-capabilities to determine whether it uses a partial suspend() or resume()
-sequence to change things so that the recorded event corresponds to the
-numeric parameter.
-
-   -   If the bus requires the irqs-disabled suspend_late()/resume_early()
-       phases, writes fail because those operations are not supported here.
-
-   -   If the recorded value is the expected value, nothing is done.
-
-   -   If the recorded value is nonzero, the device is partially resumed,
-       using the bus.resume() and/or class.resume() methods.
-
-   -   If the target value is nonzero, the device is partially suspended,
-       using the class.suspend() and/or bus.suspend() methods and the
-       PM_EVENT_SUSPEND message.
-
-Drivers have no way to tell whether their suspend() and resume() calls
-have come through the sysfs power/state file or as part of entering a
-system sleep state, except that when accessed through sysfs the normal
-parent/child sequencing rules are ignored.  Drivers (such as bus, bridge,
-or hub drivers) which expose child devices may need to enforce those rules
-on their own.