linux-toradex.git/kernel/power/main.c, branch v2.6.25.11

Suspend: Invoke suspend notifications after console switch

2008-02-01T23:30:58+00:00

In order to fix APM emulation it is necessary to enable apm-emulation
notifications for suspends triggered in various ways via the suspend
notifiers.  However, this will cause the systems using APM emulation
to lock up between X being needed to switch away from the VT and X
already waiting for resume in the APM ioctl.

This patch moves the console switch (if enabled) before the suspend
notification (and after the resume notification) to avoid this issue.

Signed-off-by: Johannes Berg 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Len Brown

Suspend: Add config option to disable the freezer if architecture wants that

2008-02-01T23:30:58+00:00

This patch makes the freezer optional for suspend to allow the
system to work (or not work) like the original PMU suspend.

Signed-off-by: Johannes Berg 
Acked-by: Pavel Machek 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Len Brown

Suspend: Introduce begin() and end() callbacks

2008-02-01T23:30:56+00:00

On ACPI systems the target state set by acpi_pm_set_target() is
reset by acpi_pm_finish(), but that need not be called if the
suspend fails.  All platforms that use the .set_target() global
suspend callback are affected by analogous issues.

For this reason, we need an additional global suspend callback that
will reset the target state regardless of whether or not the suspend
is successful.  Also, it is reasonable to rename the .set_target()
callback, since it will be used for a different purpose on ACPI
systems (due to ACPI 1.0x code ordering requirements).

Introduce the global suspend callback .end() to be executed at the
end of the suspend sequence and rename the .set_target() global
suspend callback to .begin().

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Len Brown

suspend: fix ia64 allmodconfig build

2008-02-01T23:30:56+00:00

kernel/power/main.c:488: error: ‘pm_test_attr’ undeclared here (not in a function)

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Len Brown

Suspend: Use common prefix in messages

2008-02-01T23:30:55+00:00

Make suspend messages start with one common prefix "PM: ".

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Len Brown

Suspend: Fix comment in main.c

2008-02-01T23:30:55+00:00

Fix a comment in kernel/power/main.c so that it doesn't contain lines
longer that 80 characters.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Len Brown

Suspend: Fix compilation warning for CONFIG_SUSPEND unset

2008-02-01T23:30:54+00:00

Suspend: Make debug facility depend on CONFIG_SUSPEND

Make the new suspend debug facility code depend on CONFIG_SUSPEND,
as appropriate, to remove the compiler warning printed when CONFIG_PM is set
and CONFIG_SUSPEND is not set.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Len Brown

PM: Convert PM notifiers to out-of-line code

2008-02-01T23:30:54+00:00

This patch (as1008b) converts the PM notifier routines from inline
calls to out-of-line code.  It also prevents pm_chain_head from
being created when CONFIG_PM_SLEEP isn't enabled, and EXPORTs the
notifier registration and unregistration routines.

Signed-off-by: Alan Stern 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Len Brown

suspend: build fix responding to 2.6.25 kset change

2008-02-01T23:30:54+00:00

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Len Brown

Suspend: Testing facility (rev. 2)

2008-02-01T23:30:54+00:00

Introduce sysfs attribute /sys/power/pm_test allowing one to test the suspend
core code.  Namely, writing one of the strings:

freezer
devices
platform
processors
core

to this file causes the suspend code to work in one of the test modes defined as
follows:

freezer
- test the freezing of processes

devices
- test the freezing of processes and suspending of devices

platform
- test the freezing of processes, suspending of devices and platform global
  control methods(*)

processors
- test the freezing of processes, suspending of devices, platform global
  control methods and the disabling of nonboot CPUs

core
- test the freezing of processes, suspending of devices, platform global
  control methods, the disabling of nonboot CPUs and suspending of
  platform/system devices

(*) These are ACPI global control methods on ACPI systems

Then, if a suspend is started by normal means, the suspend core will perform
its normal operations up to the point indicated by given test level.  Next, it
will wait for 5 seconds and carry out the resume operations needed to transition
the system back to the fully functional state.

Writing "none" to /sys/power/pm_test turns the testing off.

When open for reading, /sys/power/pm_test contains a space-separated list of all
available tests (including "none" that represents the normal functionality) in
which the current test level is indicated by square brackets.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Len Brown