23 Sep, 2009
1 commit
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Fix up -Wmissing-prototypes in compileable userspace code, mainly under
Documentation/.Signed-off-by: Ladinu Chandrasinghe
Signed-off-by: Trevor Keith
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Jul, 2009
1 commit
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Add two new spi_device.mode bits to accomodate more protocol options, and
pass them through to usermode drivers:* SPI_NO_CS ... a second 3-wire variant, where the chipselect
line is removed instead of a data line; transfers are still
full duplex.This obviously has STRONG protocol implications since the
chipselect transitions can't be used to synchronize state
transitions with the SPI master.* SPI_READY ... defines open drain signal that's pulled low
to pause the clock. This defines a 5-wire variant (normal
4-wire SPI plus READY) and two 4-wire variants (READY plus
each of the 3-wire flavors).Such hardware flow control can be a big win. There are ADC
converters and flash chips that expose READY signals, but not
many host controllers support it today.The spi_bitbang code should be changed to use SPI_NO_CS instead of its
current nonportable hack. That's a mode most hardware can easily support
(unlike SPI_READY).Signed-off-by: David Brownell
Cc: "Paulraj, Sandeep"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2007
1 commit
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Constify two char pointers and a struct in Documentation/spi/spidev_test.c.
Acked-by: David Brownell
Cc: Anton Vorontsov
Signed-off-by: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Aug, 2007
1 commit
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This is a simple utility used to test SPI functionality. It could stand
growing options to support using other test data patterns; this initial
version only issues full duplex transfers, which rules out 3WIRE or
Microwire links.Signed-off-by: Anton Vorontsov
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
