diff options
| author | Joakim Tjernlund <Joakim.Tjernlund@transmode.se> | 2008-05-12 14:02:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-13 08:02:25 -0700 |
| commit | c9bfcb3151040cff6714542d1da04ccd7e2d3efc (patch) | |
| tree | e3df8626f2b60d9373f8dfe125927f31d8381e1b /drivers/spi/Kconfig | |
| parent | f4ed0deae8983591264d0e194e168ef65f4775f5 (diff) | |
| download | op-kernel-dev-c9bfcb3151040cff6714542d1da04ccd7e2d3efc.zip op-kernel-dev-c9bfcb3151040cff6714542d1da04ccd7e2d3efc.tar.gz | |
spi_mpc83xx: much improved driver
The current driver may cause glitches on SPI CLK line since one must disable
the SPI controller before changing any HW settings. Fix this by implementing
a local spi_transfer function that won't change speed and/or word size while
CS is active.
While doing that heavy lifting a few other issues were addressed too:
- Make word size 16 and 32 work too.
- Honor bits_per_word and speed_hz in spi transaction.
- Optimize the common path.
This also stops using the "bitbang" framework (except for a few constants).
[Roel Kluin <12o3l@tiscali.nl>: "irq" needs to be signed]
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/spi/Kconfig')
| -rw-r--r-- | drivers/spi/Kconfig | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index fae9e8f..66ec5d8 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -126,7 +126,6 @@ config SPI_MPC52xx_PSC config SPI_MPC83xx tristate "Freescale MPC83xx/QUICC Engine SPI controller" depends on SPI_MASTER && (PPC_83xx || QUICC_ENGINE) && EXPERIMENTAL - select SPI_BITBANG help This enables using the Freescale MPC83xx and QUICC Engine SPI controllers in master mode. |
