From: Paul Walmsley <paul@pwsan.com>
Date: Fri, 28 Dec 2012 09:10:44 +0000 (-0700)
Subject: ARM: OMAP2/3: PRM: fix bogus OMAP2xxx powerstate return values
X-Git-Tag: omap-for-v3.8-rc2/fixes-signed~2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e7fff8254e318cede06a1a8c55b0d86dd4d8c5b;p=pandora-kernel.git

ARM: OMAP2/3: PRM: fix bogus OMAP2xxx powerstate return values

On OMAP2xxx chips, the register bitfields for the
PM_PWSTCTRL_*.POWERSTATE and PM_PWSTST_*.LASTSTATEENTERED are
different than those used on OMAP3/4.  The order is reversed.  So, for
example, on OMAP2xxx, 0x0 indicates 'ON'; but on OMAP3/4, 0x0
indicates 'OFF'.  Similarly, on OMAP2xxx, 0x3 indicates 'OFF', but on
OMAP3/4, 0x3 indicates 'ON'.

To fix this, we treat the OMAP3/4 values as the powerdomain API
values, and create new low-level powerdomain functions for the
OMAP2xxx chips which translate between the OMAP2xxx values and the
OMAP3/4 values.

Without this patch, the conversion of the OMAP2xxx PM code to the
functional powerstate code results in a non-booting kernel.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
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