From: Dave Martin <dave.martin@linaro.org>
Date: Mon, 10 Dec 2012 17:19:57 +0000 (+0000)
Subject: ARM: bL_switcher: Add synchronous enable/disable interface
X-Git-Tag: v3.13-rc1~103^2~1^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c0f4375146a738bae23e48fa8b5383abf02177cb;p=pandora-kernel.git

ARM: bL_switcher: Add synchronous enable/disable interface

Some subsystems will need to know for sure whether the switcher is
enabled or disabled during certain critical regions.

This patch provides a simple mutex-based mechanism to discover
whether the switcher is enabled and temporarily lock out further
enable/disable:

  * bL_switcher_get_enabled() returns true iff the switcher is
    enabled and temporarily inhibits enable/disable.

  * bL_switcher_put_enabled() permits enable/disable of the switcher
    again after a previous call to bL_switcher_get_enabled().

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
---

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