From: Qipan Li <Qipan.Li@csr.com>
Date: Tue, 2 Sep 2014 09:01:01 +0000 (+0800)
Subject: spi: sirf: correct spi gpio and hardware chipselect behaviour
X-Git-Tag: fixes-for-v3.18-merge-window~30^2~1^6~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7850cdfc8028cc7d522c032f64c62c1c01e85875;p=pandora-kernel.git

spi: sirf: correct spi gpio and hardware chipselect behaviour

the old codes check the cs-gpios, if the gpio number is 0 like:
<&gpio, 0, 0>, the driver will use the only hardware chipselect.

this is wrong because of_spi_register_master() can read property
cs-gpios from device node and set the spi master's cs number and
gpio cs automatically based on whether the cs-gpios is valid.

this patch fixes the beviour of CSR spi driver and move to a core
level supported way.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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