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| author |   Sudeep Holla <Sudeep.Holla@arm.com> | 2016-08-19 14:41:00 +0100 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-09-13 02:17:19 +0200 |
| commit | fa7fd6fa38e36d88bc9f2d0e45e5b9bd0387079f (patch) | |
| tree | 21c9156a38c00468ba0b3a332282f101055f03c4 /kernel/power/main.c | |
| parent | PM / sleep: Increase default DPM watchdog timeout to 120 (diff) | |
| download | linux-dev-fa7fd6fa38e36d88bc9f2d0e45e5b9bd0387079f.tar.xz linux-dev-fa7fd6fa38e36d88bc9f2d0e45e5b9bd0387079f.zip | |
PM / sleep: enable suspend-to-idle even without registered suspend_ops
Suspend-to-idle (aka the "freeze" sleep state) is a system sleep state
in which all of the processors enter deepest possible idle state and
wait for interrupts right after suspending all the devices.
There is no hard requirement for a platform to support and register
platform specific suspend_ops to enter suspend-to-idle/freeze state.
Only deeper system sleep states like PM_SUSPEND_STANDBY and
PM_SUSPEND_MEM rely on such low level support/implementation.
suspend-to-idle can be entered as along as all the devices can be
suspended. This patch enables the support for suspend-to-idle even on
systems that don't have any low level support for deeper system sleep
states and/or don't register any platform specific suspend_ops.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to '')
| -rw-r--r-- | kernel/power/main.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 5ea50b1b7595..281a697fd458 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -644,6 +644,7 @@ static int __init pm_init(void) return error; hibernate_image_size_init(); hibernate_reserved_size_init(); + pm_states_init(); power_kobj = kobject_create_and_add("power", NULL); if (!power_kobj) return -ENOMEM; |