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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2013-11-07 18:37:14 +0000
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2013-12-16 17:17:36 +0000
commit166936bace056dfc11452d794209f39a5e9b0fb4 (patch)
tree9dfc0c48ec97c6a46ac33f38fac3570c46c234c0 /arch/arm64/Kconfig
parentb8824dfe1b3fe1d4ef3d7ee78a071b8290d3b153 (diff)
downloadlwn-166936bace056dfc11452d794209f39a5e9b0fb4.tar.gz
lwn-166936bace056dfc11452d794209f39a5e9b0fb4.zip
arm64: kernel: add PM build infrastructure
This patch adds the required makefile and kconfig entries to enable PM for arm64 systems. The kernel relies on the cpu_{suspend}/{resume} infrastructure to properly save the context for a CPU and put it to sleep, hence this patch adds the config option required to enable cpu_{suspend}/{resume} API. In order to rely on the CPU PM implementation for saving and restoring of CPU subsystems like GIC and PMU, the arch Kconfig must be also augmented to select the CONFIG_CPU_PM option when SUSPEND or CPU_IDLE kernel implementations are selected. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
-rw-r--r--arch/arm64/Kconfig13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index baab4eb8bfe4..a1c8f39cb009 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -12,6 +12,7 @@ config ARM64
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS
select COMMON_CLK
+ select CPU_PM if (SUSPEND || CPU_IDLE)
select GENERIC_CLOCKEVENTS
select GENERIC_CLOCKEVENTS_BROADCAST if SMP
select GENERIC_IOMAP
@@ -277,6 +278,18 @@ config SYSVIPC_COMPAT
endmenu
+menu "Power management options"
+
+source "kernel/power/Kconfig"
+
+config ARCH_SUSPEND_POSSIBLE
+ def_bool y
+
+config ARM64_CPU_SUSPEND
+ def_bool PM_SLEEP
+
+endmenu
+
source "net/Kconfig"
source "drivers/Kconfig"