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| author | Joakim Tjernlund <Joakim.Tjernlund@transmode.se> | 2008-05-12 23:02:30 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-13 17:02:25 +0200 |
| commit | c9bfcb3151040cff6714542d1da04ccd7e2d3efc (patch) | |
| tree | e3df8626f2b60d9373f8dfe125927f31d8381e1b /Documentation/rbtree.txt | |
| parent | cpumask: remove bitmap_scnprintf_len and cpumask_scnprintf_len (diff) | |
| download | linux-c9bfcb3151040cff6714542d1da04ccd7e2d3efc.tar.xz linux-c9bfcb3151040cff6714542d1da04ccd7e2d3efc.zip | |
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 'Documentation/rbtree.txt')
0 files changed, 0 insertions, 0 deletions