* [PATCH 0/2 RESEND] Fix displays requiring 9 bit transfers on RPi
@ 2015-08-23 14:06 Stefan Brüns
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From: Stefan Brüns @ 2015-08-23 14:06 UTC (permalink / raw)
To: linux-spi-u79uwXL29TY76Z2rM5mHXA
Cc: Mark Brown, Noralf Trønnes, Stefan Brüns
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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