spi: sh-msiof: Use the core cs_gpio field, and make it optional

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In current implementation, CS is controlled by GPIO, which is passed
through spi->controller_data.  However, the MSIOF HW module has a function
to output CS by itself, which is already enabled and actual switch will be
done by pinmux.

Store the GPIO number in the core cs_gpio field, and ignore it if it is
an invalid (negative) GPIO number.

Loosely based on a patch from Takashi Yoshii <takasi-y@ops.dti.ne.jp>.

Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

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Geert Uytterhoeven 2014-02-20 15:43:04 +01:00 • committed by Mark Brown

parent 01cfef57ef

commit 8d19534a8d

1 changed files with 18 additions and 3 deletions

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drivers/spi/spi-sh-msiof.c

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