From: Rafael J. Wysocki <rjw@sisk.pl>
Date: Thu, 5 Jul 2012 20:12:32 +0000 (+0200)
Subject: PM / Domains: Add device domain data reference counter
X-Git-Tag: v3.6-rc1~155^2~7^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1d5fcfec22ce5f69db0d29284d2b65ff8ab1bfaa;p=pandora-kernel.git

PM / Domains: Add device domain data reference counter

Add a mechanism for counting references to the
struct generic_pm_domain_data object pointed to by
dev->power.subsys_data->domain_data if the device in question
belongs to a generic PM domain.

This change is necessary for a subsequent patch making it possible to
allocate that object from within pm_genpd_add_callbacks(), so that
drivers can attach their PM domain device callbacks to devices before
those devices are added to PM domains.

This patch has been tested on the SH7372 Mackerel board.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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