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| author | David Brownell <dbrownell@users.sourceforge.net> | 2009-09-23 03:46:18 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 18:39:44 +0400 |
| commit | 568d0697f42771425ae9f1e9a3db769fef7e10b6 (patch) | |
| tree | 8f4d1178b88481e3d3daba3e049c700a3cef72e4 /drivers/spi/spi_ppc4xx.c | |
| parent | 7869c0b9ed44404bbc675ef76f8ccb3be5496f39 (diff) | |
| download | linux-568d0697f42771425ae9f1e9a3db769fef7e10b6.tar.xz | |
spi: handle TX-only/RX-only
Support two new half-duplex SPI implementation restrictions, for links
that talk to TX-only or RX-only devices. (Existing half-duplex flavors
support both transfer directions, just not at the same time.)
Move spi_async() into the spi.c core, and stop inlining it. Then make
that function perform error checks and reject messages that demand more
than the underlying controller can support.
Based on a patch from Marek Szyprowski which did this only for the
bitbanged GPIO driver.
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
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/spi_ppc4xx.c')
0 files changed, 0 insertions, 0 deletions