From: Shawn Guo <shawn.guo@freescale.com>
Date: Tue, 26 Aug 2014 07:06:33 +0000 (+0800)
Subject: ARM: imx: add an exclusive gate clock type
X-Git-Tag: fixes-for-v3.18-merge-window~5^2~14^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19d863446a6b75b2f97b3012acf67c40b9f2ea1f;p=pandora-kernel.git

ARM: imx: add an exclusive gate clock type

There are a couple of gate clocks are mutually exclusive on i.MX6, i.e.
LVDSCLK1_IBEN and LVDSCLK1_OBEN.  They cannot be enabled simultaneously.
This patches adds an exclusive gate clock type specifically for such
case.  The clock driver will need to call imx_clk_gate_exclusive() to
register a gate clock with parameter exclusive_mask indicating the mask
of gate bits which are mutually exclusive to this gate clock.

Right now, it only handles the exclusive gate clocks which are defined
in a single hardware register, which is the case we're running into
today.  But it can be extended to handle exclusive gate clocks defined
in different registers later if needed.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
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