From: Grygorii Strashko <grygorii.strashko@ti.com>
Date: Wed, 3 Sep 2014 17:05:33 +0000 (+0300)
Subject: gpio: syscon: retrive syscon node and regs offsets from dt
X-Git-Tag: fixes-against-v3.18-rc2~140^2~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5a3e3f88b0a10f8b5baf224ebda5916195fb8745;p=pandora-kernel.git

gpio: syscon: retrive syscon node and regs offsets from dt

This patch adds handling of new "gpio,syscon-dev" DT property,
which allows to specify syscon node and data/direction registers
offsets in DT.

"gpio,syscon-dev" has following format:
	gpio,syscon-dev = <&syscon_dev data_reg_offset [direction_reg_offset]>;

where
 - syscon_dev - phandle on syscon node
 - data_reg_offset - offset of data register (in bytes)
 - direction_reg_offset - offset of dirrection register (optional, in bytes)

for example:
	gpio,syscon-dev = <&devctrl 0x254>;

In such way, the support of multiple Syscon GPIO devices is added.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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