spi: dw: support 4-16 bits per word

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The spi-dw driver currently only supports 8 or 16 bits per word.

Since the hardware supports 4-16 bits per word, adapt the driver
to also support this.

Tested on socfpga cyclone5 with a 9-bit SPI display.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Simon Goldschmidt 2018-09-04 21:49:44 +02:00 • committed by Mark Brown

parent 48c29d0d27

commit af060b3f72

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drivers/spi/spi-dw.c

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