With the generic DMA device tree helper supported by mxs-dma driver,
client devices only need to call dma_request_slave_channel() for
requesting a DMA channel from dmaengine.

Since mxs is a DT only platform now, along with the changes, the non-DT
case handling in probe function also gets removed.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>

This adds the capability to retrieve setup data from the device tree
node. The usage of platform data is still available.
Signed-off-by: NBastian Hecht <hechtb+renesas@gmail.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Fix name of slink binding and address of sflash example to make it
self consistent.
Signed-off-by: NAllen Martin <amartin@nvidia.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Use the newly introduce cs-gpios dt support on atmel.
We do not use the hardware cs as it's wired and has bugs and limitations.
As the controller believes that only active-low devices/systems exists.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch allows to specify that a SPI device is connected in 3-wire mode via
device tree.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Acked-by: NRob Herring <rob.herring@calxeda.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This will allow to use gpio for chip select with no modification in the
driver binding

When use the cs-gpios, the gpio number will be passed via the cs_gpio field
and the number of chip select will automatically increased with max(hw cs, gpio cs).

So if for example the controller has 2 CS lines, and the cs-gpios
property looks like this:

cs-gpios = <&gpio1 0 0> <0> <&gpio1 1 0> <&gpio1 2 0>;

Then it should be configured so that num_chipselect = 4 with the
following mapping:

cs0 : &gpio1 0 0
cs1 : native
cs2 : &gpio1 1 0
cs3 : &gpio1 2 0
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: spi-devel-general@lists.sourceforge.net
Signed-off-by: NRichard Genoud <richard.genoud@gmail.com>
[grant.likely: fixed up type of cs count so min() can do type checking]
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

0384e90b ("spi/mcspi: allow configuration of pin directions") did what
it claimed to do the wrong way around. D0/D1 is configured as output by
*clearing* the bits in the conf registers, hence also breaking the
former default behaviour.

Fix this before that change is merged to mainline.
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

NVIDIA's Tegra20 have the SPI (SFLASH) controller to
interface with spi flash device which is used for system
boot. Add the spi driver for this controller.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Acked-by: NStephen Warren <swarren@nvidia.com>
Tested-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Tegra20/Tegra30 supports the spi interface through its SLINK
controller. Add spi driver for SLINK controller.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Allow D0 to be an input and D1 to be an output, configurable via
platform data and a new DT property.

Based on a patch from  Matus Ujhelyi <matus.ujhelyi@streamunlimited.com>
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Even with devicetree support, we needed platform data to provide some data,
leading to mixed device tree and platform data. This patch makes it possible to
provide all that information via device tree. Now, the data must be provided
via platform data _or_ device tree completely.

Only in case of DMA where a callback specification is necessary (dma_filter()),
platform data is the only option.
Signed-off-by: NRoland Stigge <stigge@antcom.de>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Add "clock-frequency" property, which allows configuring the SPI block's
base speed.
Signed-off-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch adds DT bindings to the spi-gpio driver and some
documentation about how to use it.
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Add the driver, link it into the kbuild system and provide device tree
binding documentation.
Signed-off-by: NDavid Daney <david.daney@cavium.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Patchwork: http://patchwork.linux-mips.org/patch/4292/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Several SPI controller drivers have defined differently named properties for
the number of chip selects.  Now adding "num-cs" as a reference name for new
bindings.
Signed-off-by: NRoland Stigge <stigge@antcom.de>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch adds device tree support to the spi-pl022 driver.

Based on the initial patch by Alexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: NRoland Stigge <stigge@antcom.de>
Acked-by: NAlexandre Pereira da Silva <aletes.xgr@gmail.com>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This driver adds support for NXP SC18IS602/603 I2C to SPI bus bridge.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMarek Vasut <marex@denx.de>
Acked-by: NChris Ball <cjb@laptop.org>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMichael Walle <michael@walle.cc>
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Acked-by: NJason Cooper <jason@lakedaemon.net>
Acked-by: NSebastian Hesselbarth <sebastian.hesselbarth@googlemail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Bindings for DMA channels are still under discussion and will
change once this has been resolved. Therefore we mark them
the newly added ones as preliminary. Let's hope nobody starts
relying on them...
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Add support for device based discovery.
Signed-off-by: NThomas Abraham <thomas.abraham@linaro.org>
Acked-by: NJaswinder Singh <jaswinder.singh@linaro.org>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The gpio numbers does not match the comment.

Fix the comments for GPIOs used for chip selects.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NRob Herring <rob.herring@calxeda.com>

Rename all Tegra binding documentation according to the first or
primary compatible value they describe. This provides a clear naming
scheme for the files, and prevents any naming conflicts should future
SoC versions require their own binding.
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Add device tree support to the OMAP2+ McSPI driver.
Add the bindings documentation.

Based on original code from Rajendra.
Signed-off-by: NBenoit Cousson <b-cousson@ti.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Add binding documentation for ARM's Primecell PL022 SPI controller.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>

It adds device tree probe support for spi-imx driver.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Engineering names are more stable than marketing names. Hence, use them
for Device Tree compatible properties instead.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

As part of the gpio driver consolidation, this patch moves the Tegra driver
into drivers/gpio
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch adds a new SPI driver to support the Altera SOPC Builder
SPI component. It uses the bitbanging library.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch adds support of OpenCores tiny SPI driver.

http://opencores.org/project,tiny_spiSigned-off-by: NThomas Chou <thomas@wytron.com.tw>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

The device tree is used by more than just PowerPC.  Make the documentation
directory available to all.

v2: reorganized files while moving to create arch and driver specific
    directories.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NJosh Boyer <jwboyer@linux.vnet.ibm.com>