tree d4c37f8b64d86ef924a7422a0cf278b33c8b3f47
parent 48c29d0d27fbbb4c78d3c14c50067d7e8919ed95
author Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> 1536090584 +0200
committer Mark Brown <broonie@kernel.org> 1536232177 +0100
gpgsig -----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCgAxFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAluRCvETHGJyb29uaWVA
 a2VybmVsLm9yZwAKCRAk1otyXVSH0E7KCACD8bPcljwaZaHQq9GACVUGF+BPsWXH
 ukn836QuLpdY36l49tTIvQMD8l+l8M5qR2r9aafubSKWUfmi9xsZjAsRZVaBzROE
 vDJ5O6bmF4UbCbJ/LUf7/ivJgdOz5gsEhkneBulQvOB41wpN8JpxzQxsPr2sTMp2
 H+e/qDlJK90LSTr9TKsKmL2rqqTeolUd/dhU0t646OveKy6eiSERr1sqGFW3DLej
 N6qdS6JuO0prAbQPIyQ5B21Val1K0pIRz1AzdNVePaGq4djdxPCNwM7Dr3PW/VSo
 Kll0qpePi2/TJwbXgcj5oPyY2TSULRzzl2/G0sx7guFF0oI+dLs+Hfs+
 =++jN
 -----END PGP SIGNATURE-----

spi: dw: support 4-16 bits per word

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>