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authorSebastian Capella <sebastian.capella@linaro.org>2014-03-25 00:20:29 (GMT)
committerRussell King <rmk+kernel@arm.linux.org.uk>2014-04-23 00:24:14 (GMT)
commit603fb42a66499ab353466c7afa3d38beea20a8a9 (patch)
tree14fd0f62deb8efe86340c528ddf5abc8289630fa /arch/arm/Kconfig
parent44ae903b96b1e5f9ff3103cd86918619c188003f (diff)
downloadlinux-603fb42a66499ab353466c7afa3d38beea20a8a9.tar.xz
ARM: 8011/1: ARM hibernation / suspend-to-disk
Enable hibernation for ARM architectures and provide ARM architecture specific calls used during hibernation. The swsusp hibernation framework depends on the platform first having functional suspend/resume. Then, in order to enable hibernation on a given platform, a platform_hibernation_ops structure may need to be registered with the system in order to save/restore any SoC-specific / cpu specific state needing (re)init over a suspend-to-disk/resume-from-disk cycle. For example: - "secure" SoCs that have different sets of control registers and/or different CR reg access patterns. - SoCs with L2 caches as the activation sequence there is SoC-dependent; a full off-on cycle for L2 is not done by the hibernation support code. - SoCs requiring steps on wakeup _before_ the "generic" parts done by cpu_suspend / cpu_resume can work correctly. - SoCs having persistent state which is maintained during suspend and resume, but will be lost during the power off cycle after suspend-to-disk. This is a rebase/rework of Frank Hofmann's v5 hibernation patchset. Acked-by: Russ Dill <Russ.Dill@ti.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Signed-off-by: Sebastian Capella <sebastian.capella@linaro.org> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> [fixed duplicate virt_to_pfn() definition --rmk] Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig')
-rw-r--r--arch/arm/Kconfig5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ab438cb..5850617 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2294,6 +2294,11 @@ config ARCH_SUSPEND_POSSIBLE
config ARM_CPU_SUSPEND
def_bool PM_SLEEP
+config ARCH_HIBERNATION_POSSIBLE
+ bool
+ depends on MMU
+ default y if ARCH_SUSPEND_POSSIBLE
+
endmenu
source "net/Kconfig"