From 1b9e6b2745621984b4aad49b0386814815fb15e7 Mon Sep 17 00:00:00 2001
From: Joseph Lo <josephl@nvidia.com>
Date: Fri, 19 Jul 2013 17:25:25 +0800
Subject: [PATCH] ARM: tegra114: add low level support for CPU idle
 powered-down mode

The flow controller would take care the power sequence when CPU idle in
powered-down mode. It powered gate the CPU when CPU runs into WFI
instruction. And wake up the CPU when event be triggered.

The sequence is below.
* setting wfi bitmap for the CPU as the halt event in the
  FLOW_CTRL_CPU_HALT_REG to monitor the CPU running into WFI,then power
  gate it
* setting IRQ and FIQ as wake up event to wake up CPU when event triggered

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
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