linux-toradex.git/drivers/spi/spi-gpio.c, branch v3.10.78

spi-gpio: init CS before spi_bitbang_setup()

2013-04-10T13:47:09+00:00

spi_bitbang_setup() deasserts the chip select line to initialise
the device. The chip select GPIO line is obtained from
spi_gpio->cs_gpios[] private data.
Currently, devices that are not registered under devicetree
environment will call into spi_bitbang_setup() with stale
cs_gpios[].

This patch ensures spi_gpio->cs_gpios[] is always initialised prior
to calling spi_bitbang_setup().

Reviewed-by: Daniel Mack 
Signed-off-by: Josef Ahmad 
Signed-off-by: Mark Brown

spi: spi-gpio: Add checks for the dt properties

2013-01-26T07:35:56+00:00

The bindings assumed that the gpios properties were always there, which
made the NO_TX and NO_RX mode not usable from device tree. Add extra
checks to make sure that the driver can work if either MOSI or MISO is
not used.

Signed-off-by: Maxime Ripard 
Cc: Mark Brown 
Signed-off-by: Mark Brown

spi: Remove HOTPLUG section attributes

2012-12-07T17:06:43+00:00

CONFIG_HOTPLUG is going away as an option.  As result the __dev*
markings will be going away.

Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst,
and __devexit.

Bill Pemberton has done most of the legwork on this series. I've used
his script to purge the attributes from the drivers/gpio tree.

Reported-by: Bill Pemberton 
Signed-off-by: Grant Likely

spi/gpio: Fix stub for spi_gpio_probe_dt()

2012-09-07T00:23:06+00:00

The gpio_ was missing from the name.  Add a name for the parameter while
we're at it since GCC warns.

Reported-by: Stephen Rothwell 
Signed-off-by: Mark Brown

spi: spi-gpio: Add DT bindings

2012-09-05T23:41:09+00:00

This patch adds DT bindings to the spi-gpio driver and some
documentation about how to use it.

Signed-off-by: Daniel Mack 
Signed-off-by: Mark Brown

spi: spi-gpio: store chipselect information in private structure

2012-09-05T23:41:05+00:00

The spi-gpio driver currently assumes the chipselect gpio number is
stored in ->controller_data of the device's static board information.

In devicetree environments, this information is unavailable and has to
be derived from the DT node.

This patch moves the gpio storage to the controller's private data so
the DT bindings can easily build upon the driver.

Signed-off-by: Daniel Mack 
Signed-off-by: Mark Brown

spi/gpio: start with CS non-active

2012-07-10T14:28:56+00:00

The chip select line was configured as output with the initial value
being active explicitly. It was later deasserted during
spi_bitbang_setup() without any clock activity in between. So it makes
no sense to activate the device at all and the chip select line can
better start non-active.

Signed-off-by: Uwe Kleine-König 
Acked-by: Linus Walleij 
Signed-off-by: Mark Brown

spi/gpio: fix section mismatch warning

2011-12-07T21:17:39+00:00

Fixes:
The function __devinit spi_gpio_probe() references
a function __init spi_gpio_alloc.isra.4().
If spi_gpio_alloc.isra.4 is only used by spi_gpio_probe then
annotate spi_gpio_alloc.isra.4 with a matching annotation.

[wsa: fix spi_gpio_request(), too]

Signed-off-by: Manuel Lauss 
Signed-off-by: Wolfram Sang

spi: Add module.h to implicit users in drivers/spi

2011-10-31T23:32:17+00:00

We are clipping down the presence of module.h, since it was
everywhere.  If you really need it, you better call it out,
as per this changeset.

Signed-off-by: Paul Gortmaker

drivercore: Add helper macro for platform_driver boilerplate

2011-10-24T22:35:47+00:00

For simple modules that contain a single platform_driver without any
additional setup code then ends up being a block of duplicated
boilerplate.  This patch adds a new macro, module_platform_driver(),
which replaces the module_init()/module_exit() registrations with
template functions.

Signed-off-by: Grant Likely 
Acked-by: Greg Kroah-Hartman 
Reviewed-by: Magnus Damm 
Reviewed-by: Mark Brown 
Reviewed-by: Stephen Boyd