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| author |   Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2013-11-07 18:37:14 +0000 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2013-12-16 17:17:36 +0000 |
| commit | 166936bace056dfc11452d794209f39a5e9b0fb4 (patch) | |
| tree | 9dfc0c48ec97c6a46ac33f38fac3570c46c234c0 | |
| parent | arm64: kernel: add CPU idle call (diff) | |
| download | linux-dev-166936bace056dfc11452d794209f39a5e9b0fb4.tar.xz linux-dev-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>
| -rw-r--r-- | arch/arm64/Kconfig | 13 | ||||
| -rw-r--r-- | arch/arm64/kernel/Makefile | 1 |
2 files changed, 14 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" diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 5ba2fd43a75b..1cd339d5037b 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -18,6 +18,7 @@ arm64-obj-$(CONFIG_SMP) += smp.o smp_spin_table.o arm64-obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o arm64-obj-$(CONFIG_HAVE_HW_BREAKPOINT)+= hw_breakpoint.o arm64-obj-$(CONFIG_EARLY_PRINTK) += early_printk.o +arm64-obj-$(CONFIG_ARM64_CPU_SUSPEND) += sleep.o suspend.o obj-y += $(arm64-obj-y) vdso/ obj-m += $(arm64-obj-m) |