From: Lars Poeschel <poeschel@lemonage.de>
Date: Thu, 4 Apr 2013 10:02:02 +0000 (+0200)
Subject: gpio: mcp23s08: convert driver to DT
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~23^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=97ddb1c88b4ebe057b63346660abfee165ddd468;p=pandora-kernel.git

gpio: mcp23s08: convert driver to DT

This converts the mcp23s08 driver to be able to be used with
device tree.

There is a "spi-present-mask" device tree property, that allows to
use multiple of this spi chips on the same chipselect.

v4:
- removed the ability to specify the pullup from device tree
- updated binding doc

v3:
- removed mcp,chips device tree property in favour of a
    mcp,spi-present-mask and a flag for the pullup of every gpio
- seperated the match table. Now there is one for i2c and one for spi
- do the of reading stuff on stack of the probe function - no devm
    any more

v2:
- squashed booth patches together
- fixed build warning, when CONFIG_OF is not defined
- use of_match_ptr macro for of_match_table

Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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