28 Sep, 2011
1 commit
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There are numerous broken references to Documentation files (in other
Documentation files, in comments, etc.). These broken references are
caused by typo's in the references, and by renames or removals of the
Documentation files. Some broken references are simply odd.Fix these broken references, sometimes by dropping the irrelevant text
they were part of.Signed-off-by: Paul Bolle
Signed-off-by: Jiri Kosina
19 Jun, 2011
1 commit
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Since commit
commit 2f1a74e5a2de0459139b85af95e901448726c375
Author: eric miao
Date: Wed Nov 21 18:50:53 2007 +0800[ARM] pxa: make pxa2xx_spi driver use ssp_request()/ssp_free()
the ssp_type field in struct pxa2xx_spi_master is no longer available.
Signed-off-by: Stefan Schmidt
Signed-off-by: Grant Likely
09 Jun, 2011
1 commit
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This patch adds DMA support for the EP93xx SPI driver. By default the DMA is
not enabled but it can be enabled by setting ep93xx_spi_info.use_dma to true
in board configuration file.Note that the SPI driver still uses PIO for small transfers (
Acked-by: H Hartley Sweeten
Acked-by: Vinod Koul
Signed-off-by: Grant Likely
31 Mar, 2011
1 commit
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Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: Lucas De Marchi
01 Dec, 2010
1 commit
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The PXA-SPI driver relies on some files / defines which are arm specific
and are within the ARM tree. The CE4100 SoC which is x86 has also the
SPI core.
This patch moves the ssp and spi files from arm/mach-pxa and plat-pxa to
include/linux where the CE4100 can access them.This move got verified by building the following defconfigs:
cm_x2xx_defconfig corgi_defconfig em_x270_defconfig ezx_defconfig
imote2_defconfig pxa3xx_defconfig spitz_defconfig zeus_defconfig
raumfeld_defconfig magician_defconfigSigned-off-by: Sebastian Andrzej Siewior
Signed-off-by: Dirk Brandewie
25 May, 2010
2 commits
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This patch adds an SPI master driver for the Cirrus EP93xx SPI controller found
in EP93xx chips.Signed-off-by: Mika Westerberg
Signed-off-by: H Hartley Sweeten
Acked-by: H Hartley Sweeten
Signed-off-by: Grant Likely -
Fix this warning:
Documentation/spi/spidev_fdx.c: In function `do_msg':
Documentation/spi/spidev_fdx.c:61: warning: cast from pointer to integer of different size
Documentation/spi/spidev_fdx.c:64: warning: cast from pointer to integer of different sizebuf should be unsigned long to match native arch on 32-bit x86 compile.
Signed-off-by: Prarit Bhargava
Signed-off-by: Grant Likely
30 Apr, 2010
1 commit
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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
04 Dec, 2009
1 commit
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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
23 Sep, 2009
2 commits
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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 -
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
22 Apr, 2009
1 commit
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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
07 Jan, 2009
1 commit
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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
02 Dec, 2008
1 commit
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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
31 Oct, 2008
1 commit
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Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2008
1 commit
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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
13 Aug, 2008
1 commit
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Currently source files in the Documentation/ sub-dir can easily bit-rot
since they are not generally buildable, either because they are hidden in
text files or because there are no Makefile rules for them. This needs to
be fixed so that the source files remain usable and good examples of code
instead of bad examples.Add the ability to build source files that are in the Documentation/ dir.
Add to Kconfig as "BUILD_DOCSRC" config symbol.Use "CONFIG_BUILD_DOCSRC=1 make ..." to build objects from the
Documentation/ sources. Or enable BUILD_DOCSRC in the *config system.
However, this symbol depends on HEADERS_CHECK since the header files need
to be installed (for userspace builds).Built (using cross-tools) for x86-64, i386, alpha, ia64, sparc32,
sparc64, powerpc, sh, m68k, & mips.Signed-off-by: Randy Dunlap
Reviewed-by: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Aug, 2008
1 commit
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This just leaves include/asm-arm/plat-* to deal with.
Signed-off-by: Russell King
28 Apr, 2008
1 commit
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Move sample source code to its own source file so that it can be used
easier and build-tested/check/maintained by anyone.(Makefile changes are in a separate patch for all of Documentation/.)
Signed-off-by: Randy Dunlap
Acked-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Apr, 2008
1 commit
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Update SPI documentation to clarify some areas of recent confusion: clock
polarity takes effect when chipselect goes active; and zero length buffers are
OK in certain cases.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Oct, 2007
1 commit
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* Convert files to UTF-8.
* Also correct some people's names
(one example is Eißfeldt, which was found in a source file.
Given that the author used an ß at all in a source file
indicates that the real name has in fact a 'ß' and not an 'ss',
which is commonly used as a substitute for 'ß' when limited to
7bit.)* Correct town names (Goettingen -> Göttingen)
* Update Eberhard Mönkeberg's address (http://lkml.org/lkml/2007/1/8/313)
Signed-off-by: Jan Engelhardt
Signed-off-by: Adrian Bunk
17 Oct, 2007
2 commits
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Make the SPI framework and drivers stop using class_device. Update docs
accordingly ... highlighting just which sysfs paths should be
"safe"/stable.Signed-off-by: Tony Jones
Signed-off-by: David Brownell
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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
18 Jul, 2007
1 commit
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This adds a driver for the LM70-LLP parport adapter, which is an eval board
for the LM70 temperature sensor. For those without that board, it may be a
simpler example of a parport-to-SPI adapter then spi_butterfly.Signed-off-by: Kaiwan N Billimoria
Doc, coding style, and interface updates; build fixes. Minor rename.
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 May, 2007
1 commit
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Update the SPI documentation to cover a few points that have proven to be
confusing or unclear; most notably the two clock mode bits.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 May, 2007
2 commits
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Various documentation updates for the SPI infrastructure, to clarify things
that may not have been clear, to cope with lack of editing, and fix
omissions.Also, plug SPI into the kernel-api DocBook template, and fix all the
resulting glitches in document generation.Signed-off-by: David Brownell
Cc: "Randy.Dunlap"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a filesystem API for stack. The initial version of
this interface is purely synchronous.dbrownell@users.sourceforge.net:
Cleaned up, bugfixed; much simplified; added preliminary documentation.
Works with mdev given CONFIG_SYSFS_DEPRECATED; and presumably udev.
Updated SPI_IOC_MESSAGE ioctl to full spi_message semantics, supporting
groups of one or more transfers (each of which may be full duplex if
desired).This is marked as EXPERIMENTAL with an explicit disclaimer that the API
(notably the ioctls) is subject to change.Signed-off-by: Andrea Paterniani
Signed-off-by: David Brownell
Cc: Arnd Bergmann
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Apr, 2007
1 commit
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This patch removes the unnecessary bit number from CKENnn_XXXX
definitions for PXA, so thatCKEN0_PWM0 --> CKEN_PWM0
CKEN1_PWM1 --> CKEN_PWM1
...
CKEN24_CAMERA --> CKEN_CAMERAThe reasons for the change of these defitions are:
1. they do not scale - they are currently valid for pxa2xx, but
definitely not valid for pxa3xx, e.g., pxa3xx has bit 3 for camera
instead of bit 242. they are unnecessary - the peripheral name within the definition
has already announced its usage, we don't need those bit numbers
to know which peripheral we are going to enable/disable clock for3. they are inconvenient - think about this: a driver programmer
for pxa has to remember which bit in the CKEN register to turn
on/offAnother change in the patch is to make the definitions equal to its
clock bit index, so that#define CKEN_CAMERA (24)
instead of
#define CKEN_CAMERA (1 << 24)
this change, however, will add a run-time bit shift operation in
pxa_set_cken(), but the benefit of this change is that it scales
when bit index exceeds 32, e.g., pxa3xx has two registers CKENA
and CKENB, totally 64 bit for this, suppose CAMERA clock enabling
bit is CKENB:10, one can simply define CKEN_CAMERA to be (32 + 10)
and so that pxa_set_cken() need minimum change to adapt to that.Signed-off-by: eric miao
Signed-off-by: Russell King
13 Feb, 2007
2 commits
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The spi_register_driver() sets the bus_type field of the spi_driver being
registered, so there is no need to have it set in the driver itself.Signed-off-by: Ben Dooks
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add wrappers for getting and setting the driver data using spi_device
instead of using dev_{get|set}_drvdata with &spi->dev, to mirror the
platform_{get|set}_drvdata.Signed-off-by: Ben Dooks
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Dec, 2006
1 commit
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Stabilize PIO mode transfers against a range of word sizes and FIFO
thresholds and fixes word size setup/override issues.1) 16 and 32 bit DMA/PIO transfers broken due to timing differences.
2) Potential for bad transfer counts due to transfer size assumptions.
3) Setup function broken is multiple ways.
4) Per transfer bit_per_word changes break DMA setup in pump_tranfers.
5) False positive timeout are not errors.
6) Changes in pxa2xx_spi_chip not effective in calls to setup.
7) Timeout scaling wrong for PXA255 NSSP.
8) Driver leaks memory while busy during unloading.Known issues:
SPI_CS_HIGH and SPI_LSB_FIRST settings in struct spi_device are not handled.
Testing:
This patch has been test against the "random length, random bits/word,
random data (verified on loopback) and stepped baud rate by octaves
(3.6MHz to 115kHz)" test. It is robust in PIO mode, using any
combination of tx and rx thresholds, and also in DMA mode (which
internally computes the thresholds).Much thanks to Ned Forrester for exhaustive reviews, fixes and testing.
The driver is substantially better for his efforts.Signed-off-by: Stephen Street
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Oct, 2006
1 commit
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Remove many duplicated words under Documentation/ and do other small
cleanups.Examples:
"and and" --> "and"
"in in" --> "in"
"the the" --> "the"
"the the" --> "to the"
...Signed-off-by: Paolo Ornati
Signed-off-by: Adrian Bunk
17 May, 2006
2 commits
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We need to be able to have a "SPI bus 0" matching chip numbering; but
that number was wrongly used to flag dynamic allocation of a bus number.This patch resolves that issue; now negative numbers trigger dynamic alloc.
It also updates the how-to-write-a-controller-driver overview to mention
this stuff.Signed-off-by: David Brownell
Signed-off-by: Greg Kroah-Hartman -
This driver turns a PXA2xx synchronous serial port (SSP) into a SPI master
controller (see Documentation/spi/spi_summary). The driver has the following
features:- Support for any PXA2xx SSP
- SSP PIO and SSP DMA data transfers.
- External and Internal (SSPFRM) chip selects.
- Per slave device (chip) configuration.
- Full suspend, freeze, resume support.Signed-off-by: Stephen Street
Signed-off-by: Andrew Morton
Cc: David Brownell
Signed-off-by: Greg Kroah-Hartman
07 Feb, 2006
1 commit
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This resolves some minor version skew glitches that accumulated for the AVR
Butterfly adapter driver, which caused among other things the existence of
a duplicate Kconfig entry. Most of it boils down to comment updates, but in
one case it removes some now-superfluous code that would be better if not
copied into other controller-level drivers.Signed-off-by: David Brownell
14 Jan, 2006
3 commits
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This adds a bitbanging parport based adaptor cable for AVR Butterfly, giving
SPI links to its DataFlash chip and (eventually) firmware running in the card.Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman -
This collects some small SPI patches that seem to be missing from the MM tree:
- spi_butterfly kbuild hooks got dropped somehow; this restores them
- quick fix for a (theoretical?) m25p80_write() oops noted by Andrew
- quick fix for a potential config-specific oops for mtd_dataflash()
- minor doc tweaksSigned-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman -
This includes various updates to the SPI core:
- Fixes a driver model refcount bug in spi_unregister_master() paths.
- The spi_master structures now have wrappers which help keep drivers
from needing class-level get/put for device data or for refcounts.- Check for a few setup errors that would cause oopsing later.
- Docs say more about memory management. Highlights the use of DMA-safe
i/o buffers, and zero-initializing spi_message and such metadata.- Provide a simple alloc/free for spi_message and its spi_transfer;
this is only one of the possible memory management policies.Nothing to break code that already works.
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman