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Commit ef5a621b authored by Lorenzo Pieralisi's avatar Lorenzo Pieralisi Committed by Abhimanyu Kapur
Browse files

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.

Change-Id: Idfe12b087b22b11f6eb87379615394081ebab7f0
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Git-commit: 166936bace056dfc11452d794209f39a5e9b0fb4
Git-Repo: git://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git


Signed-off-by: default avatarAbhimanyu Kapur <abhimany@codeaurora.org>
parent e9341697

arch/arm64/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ config ARM64 
	select ARM_GIC

	select CLONE_BACKWARDS

	select COMMON_CLK if !ARCH_MSM

	select CPU_PM if (SUSPEND || CPU_IDLE)

	select GENERIC_CLOCKEVENTS

	select GENERIC_CLOCKEVENTS_BROADCAST if SMP

	select GENERIC_IOMAP
@@ -265,6 +266,18 @@ 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"

arch/arm64/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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)