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authorDavid Brownell <david-b@pacbell.net>2007-06-16 10:16:08 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-16 13:16:16 -0700
commitf5a9c77df45b113d21b64cbc2bf6c72a0da48998 (patch)
treec68315e2d5e3e3b8075bfbe01fab054efc1d9bf2 /arch/um/os-Linux/start_up.c
parented45666271f4fafa95b9d8ad44050e9a9bd2376e (diff)
downloadlinux-f5a9c77df45b113d21b64cbc2bf6c72a0da48998.tar.gz
spi doc updates
Update two points in the SPI interface documentation: - Update description of the "chip stays selected after message ends" mode. In some cases it's required for correctness; it isn't just a performance tweak. (Yes: to use this mode on mult-device busses, another programming interface will be needed. One draft has been circulated already.) - Clarify spi_setup(), highlighting that callers must ensure that no requests are queued (can't change configuration except between I/Os), and that the device must be deselected when this returns (which is a key part of why it's called during device init). 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 'arch/um/os-Linux/start_up.c')
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