30 Apr, 2010

1 commit

• 95b1ed2ac   spi: spidev_test gives error upon 1-byte transfer ... Browse Code »

  The sample application spidev_test.c is using SPI_IOC_MESSAGE ioctl to do
  an SPI transfer. This ioctl returns the number of bytes successfully
  transmitted or a negative error code upon erroneous completion. The
  application however is returning an error if the result of the ioclt if
  the return value is 1. This makes the application to fail upon 1-byte
  length transfers.

  Signed-off-by: Hector Palacios
  Signed-off-by: Andrew Morton
  Signed-off-by: Grant Likely

  Hector Palacios

  2010-04-30 06:40:30 +0800  

23 Sep, 2009

1 commit

• b7ed698cc   Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS ... Browse Code »

  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

  Ladinu Chandrasinghe

  2009-09-23 22:39:28 +0800  

01 Jul, 2009

1 commit

• b55f627fe   spi: new spi->mode bits ... Browse Code »

  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

  David Brownell

  2009-07-01 09:56:00 +0800  

17 Oct, 2007

1 commit

• cd58310d7   Documentation/spi/spidev_test.c: constify some variables ... Browse Code »

  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

  WANG Cong

  2007-10-17 00:43:10 +0800  

01 Aug, 2007

1 commit

• 22b238bdb   spidev_test utility ... Browse Code »

  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

  Anton Vorontsov

  2007-08-01 06:39:40 +0800