spi: sirf: correct spi gpio and hardware chipselect behaviour
authorQipan Li <Qipan.Li@csr.com>
Tue, 2 Sep 2014 09:01:01 +0000 (17:01 +0800)
committerMark Brown <broonie@kernel.org>
Thu, 4 Sep 2014 19:20:15 +0000 (20:20 +0100)
commit7850cdfc8028cc7d522c032f64c62c1c01e85875
treefe03078fee1cc8700136b73f46a4abd71c823efd
parent7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9
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>
drivers/spi/spi-sirf.c