From 166936bace056dfc11452d794209f39a5e9b0fb4 Mon Sep 17 00:00:00 2001
From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Date: Thu, 7 Nov 2013 18:37:14 +0000
Subject: [PATCH] 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>
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