linux.git/Documentation/spi, branch v2.6.34

spi: spidev_test gives error upon 1-byte transfer

2010-04-29T22:40:30+00:00

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

tree-wide: fix assorted typos all over the place

2009-12-04T14:39:55+00:00

That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa 
Signed-off-by: Jiri Kosina

spi: fix spelling of `automatically' in documentation

2009-09-23T14:39:44+00:00

Fix spelling of `automatically' in Documentation/spi/spi-summary.

Signed-off-by: Ben Dooks 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS

2009-09-23T14:39:28+00:00

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

spi: new spi->mode bits

2009-07-01T01:56:00+00:00

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

spi: documentation: emphasise spi_master.setup() semantics

2009-04-21T20:41:50+00:00

This is a doc-only patch which I hope will reduce the number of
spi_master controller driver patches starting out with a common
implementation bug.

(As in: almost every spi_master driver I see starts out with its
version of this bug.  Sigh.)

It just re-emphasizes that the setup() method may be called for one
device while a transfer is active on another ...  which means that most
driver implementations shouldn't touch any registers.

Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

hwmon: (lm70) Code streamlining and cleanup

2009-01-07T15:37:34+00:00

This fixes a byteswap bug in the LM70 temperature sensor driver,
which was previously covered up by a converse bug in the driver
for the LM70EVAL-LLP board (which is also fixed).

Other fixes:  doc updates, remove an annoying msleep(), and improve
three-wire protocol handling.

Signed-off-by: Kaiwan N Billimoria 
[ dbrownell@users.sourceforge.net: doc and whitespace tweaks ]
Signed-off-by: David Brownell 
Signed-off-by: Jean Delvare

spi documentation: use __initdata on struct

2008-12-02T03:55:24+00:00

Use __initdata for data, not __init.

Signed-off-by: Roel Kluin 
Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

.gitignore updates

2008-10-30T18:38:45+00:00

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pxa2xx_spi: fix chip_info defaults and documentation.

2008-10-16T18:21:38+00:00

Make the chip info structure data optional by providing reasonable
defaults.  Improve corresponding documentation, and highlight the drawback
of not providing explicit chipselect control.

DMA can determine appropriate dma_burst_size and thresholds automatically
so use DMA even if dma_burst_size is not specified.

Signed-off-by: Vernon Sauder 
Reviewed-by: Ned Forrester 
Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds