From: Sekhar Nori <nsekhar@ti.com>
Date: Tue, 3 Nov 2009 09:44:13 +0000 (+0530)
Subject: davinci: add CPU idle driver
X-Git-Tag: v2.6.33-rc1~348^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a6c0f6eca1173e9d44f1f0fb9ecc832abd7d77d6;p=pandora-kernel.git

davinci: add CPU idle driver

The patch adds support for DaVinci cpu idle driver.

Two idle states are defined:
1. Wait for interrupt
2. Wait for interrupt and DDR self-refresh (or power down)

Some DaVinci SoCs support putting DDR in self-refresh (eg Dm644x, DM6467)
while others support putting DDR in self-refresh and power down (eg DM35x,
DA8xx).

Putting DDR (or mDDR) in power down saves more power than self-refresh.

The patch has been tested on DA850/OMAP-L138 EVM.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
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