[PATCH 0/2 RESEND] Fix displays requiring 9 bit transfers on RPi

[Stefan Brüns <stefan.bruens@xxxxxxxxxxxxxx>]

Some displays need 9 bit long SPI transfers (Command/Data flag plus
8 bit data). FBTFT has emulation code in case the controller only
supports 8 bit transfers, but this is only used if the controller
setup function report an error if bits_per_word is set to 9.

Report unsupported bits_per_word settings in spi_setup Currently the
SPI core only checks bits_per_word on transfer, but not on setup.

Replace invocations of master->setup(...) with spi_setup(...).

Tested on RPi B with an Ilitek9341 based TFT display in 9 bit mode.

Stefan Brüns (2):
  spi: check bits_per_word in spi_setup
  staging/fbtft: use spi_setup instead of direct call to master->setup

 drivers/spi/spi.c                    | 27 +++++++++++++++++++--------
 drivers/staging/fbtft/fb_watterott.c |  4 ++--
 drivers/staging/fbtft/fbtft-core.c   |  4 ++--
 drivers/staging/fbtft/flexfb.c       |  4 ++--
 4 files changed, 25 insertions(+), 14 deletions(-)

-- 
2.1.4

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