spi: sirf: add support for USP-based SPI

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USP is a general purpose serial port in SiRFSoC, which can work as SPI.
the most data flow of USP and pure SPI is same with main differences
in registers layout.
this patch moves registers layout to private data, and use flags to
differentiate other minor differences between prima2-spi, prima2-usp
and atlas7-usp for hardware configuration.

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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Qipan Li 2015-05-19 14:41:12 +00:00 • committed by Mark Brown

parent a34bcbedf8

commit e3fb57c832

2 changed files with 586 additions and 209 deletions

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3

Documentation/devicetree/bindings/spi/spi-sirf.txt

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786

drivers/spi/spi-sirf.c

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