[U-Boot] [PATCH V2 2/6] spi: omap3: add support for more word lengths

[Anatolij Gustschin]

On Wed, 16 Oct 2013 17:23:25 +0300
Nikita Kiryanov <nikita at compulab.co.il> wrote:

> Current implementation only supports 8 bit word lengths, even though
> omap3 can handle anything between 4 and 32.
> 
> Update the spi interface to support changing the SPI word length,
> and implement it in omap3_spi driver to support the full range of
> possible word lengths.
> This implementation is backwards compatible by defaulting to the old
> behavior of 8 bit word lengths.
> Also, it required a change to the omap3_spi non static I/O functions,
> but since they are not used anywhere else, no collateral changes are required.
> 
> Cc: Tom Rini <trini at ti.com>
> Cc: Jagannadha Sutradharudu Teki <jagannadh.teki at gmail.com>
> Cc: Igor Grinberg <grinberg at compulab.co.il>
> Signed-off-by: Nikita Kiryanov <nikita at compulab.co.il>
> ---
> Changes in V2:
> 	- Removed semicolon from #define SPI_DEFAULT_WORDLEN (Gerhard Sittig,
> 	Igor Grinberg)
> 	- Moved wordlen to generic spi_slave struct, and added generic
> 	implementation for spi_set_wordlen which only updates the struct without
> 	touching the hardware (Igor Grinberg)
> 	- Update wordlen in hardware just before doing SPI transactions, not
> 	when changing wordlen (Igor Grinberg)
> 	- OMAP3 specific check of wordlen value from old implementation of
> 	spi_set_wordlen moved to xfer. It refines the more general check done
> 	in the new spi_set_wordlen.
> 	- Fixed comment style in spi.h following a rebase on top of latest
> 	U-Boot
> 
>  drivers/spi/omap3_spi.c | 69 +++++++++++++++++++++++++++++++++++--------------
>  drivers/spi/omap3_spi.h |  8 +++---
>  drivers/spi/spi.c       | 13 ++++++++++
>  include/spi.h           | 16 ++++++++++++
>  4 files changed, 82 insertions(+), 24 deletions(-)

applied to u-boot-video/master, thanks!

Anatolij