linux-toradex.git/include/linux/amba/pl022.h, branch v3.12-rc7

spi/pl022: Add chip select handling via GPIO

2012-08-22T19:00:44+00:00

This patch adds the ability for the driver to control the chip select directly.
This enables independence from cs_control callbacks.  Configurable via
platform_data, to be extended as DT in the following patch.

Based on the initial patch by Alexandre Pereira da Silva 

Signed-off-by: Roland Stigge 
Acked-by: Alexandre Pereira da Silva 
Reviewed-by: Linus Walleij 
Signed-off-by: Mark Brown

spi/pl022: cleanup pl022 header documentation

2012-07-02T11:55:36+00:00

Remove the unused fields from struct ssp_config_chip that was removed
before
Add bus_id documentation to pl022_ssp_controller

Signed-off-by: Alexandre Pereira da Silva 
Signed-off-by: Roland Stigge

spi/pL022: include types.h to remove compilation warnings

2012-03-30T22:46:22+00:00

linux/pl022.h uses definitions like, u8, u16, etc, which have dependency of
types.h file, which isn't included in it. So, we get compilation warnings.

This patch includes types.h there to fix these warnings.

Signed-off-by: Viresh Kumar 
Acked-by: Linus Walleij 
Signed-off-by: Grant Likely

Merge tag 'device-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2012-03-24T17:41:37+00:00

Pull  avoidance patches from Paul Gortmaker:
 "Nearly every subsystem has some kind of header with a proto like:

	void foo(struct device *dev);

  and yet there is no reason for most of these guys to care about the
  sub fields within the device struct.  This allows us to significantly
  reduce the scope of headers including headers.  For this instance, a
  reduction of about 40% is achieved by replacing the include with the
  simple fact that the device is some kind of a struct.

  Unlike the much larger module.h cleanup, this one is simply two
  commits.  One to fix the implicit  users, and then one
  to delete the device.h includes from the linux/include/ dir wherever
  possible."

* tag 'device-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
  device.h: audit and cleanup users in main include dir
  device.h: cleanup users outside of linux/include (C files)

device.h: audit and cleanup users in main include dir

2012-03-16T14:38:24+00:00

The  header includes a lot of stuff, and
it in turn gets a lot of use just for the basic "struct device"
which appears so often.

Clean up the users as follows:

1) For those headers only needing "struct device" as a pointer
in fcn args, replace the include with exactly that.

2) For headers not really using anything from device.h, simply
delete the include altogether.

3) For headers relying on getting device.h implicitly before
being included themselves, now explicitly include device.h

4) For files in which doing #1 or #2 uncovers an implicit
dependency on some other header, fix by explicitly adding
the required header(s).

Any C files that were implicitly relying on device.h to be
present have already been dealt with in advance.

Total removals from #1 and #2: 51.  Total additions coming
from #3: 9.  Total other implicit dependencies from #4: 7.

As of 3.3-rc1, there were 110, so a net removal of 42 gives
about a 38% reduction in device.h presence in include/*

Signed-off-by: Paul Gortmaker

spi/pl022: Add high priority message pump support

2012-02-02T18:32:16+00:00

This switches the PL022 worker to a kthread in order to get
hold of a mechanism to control the message pump priority. On
low-latency systems elevating the message kthread to realtime
priority give a real sleek response curve. This has been
confirmed by measurements. Realtime priority elevation for
a certain PL022 port can be requested from platform data.

Cc: Mark Brown 
Acked-by: Viresh Kumar 
Signed-off-by: Chris Blair 
Signed-off-by: Linus Walleij 
Signed-off-by: Grant Likely

spi/pl022: add support for pm_runtime autosuspend

2011-12-01T16:16:08+00:00

Adds support for configuring the spi bus to use autosuspend for
runtime power management. This can reduce the latency in starting an
spi transfer by not suspending the device immediately following
completion of a transfer. If another transfer then takes place before
the autosuspend timeout, the call to resume the device can return
immediately rather than needing to risk sleeping in order to resume
the device.

Reviewed-by: Viresh Kumar 
Signed-off-by: Chris Blair 
Signed-off-by: Linus Walleij

spi/pl022: get rid of chipinfo dev pointer

2010-10-13T03:37:37+00:00

What is the dev pointer doing inside the platform data anyway.
We have another pointer to the actual device at hand, use that.

Signed-off-by: Linus Walleij 
Signed-off-by: Grant Likely

spi/pl022: Add spi->mode support to AMBA SPI driver

2010-10-13T03:37:37+00:00

This patch adds spi->mode support for the AMBA pl022 driver and
allows spidev to correctly alter SPI modes. Unused fields used in
the pl022 header file for the pl022_config_chip have been removed.

The ab8500 client driver selects the data transfer size instead
of the platform data.

For platforms that use the amba pl022 driver, the unused fields
in the controller data structure have been removed and the .mode
field in the SPI board info structure is used instead.

Signed-off-by: Kevin Wells 
Tested-by: Linus Walleij 
Acked-by: Linus Walleij 
Signed-off-by: Grant Likely

spi/pl022: add PrimeCell generic DMA support

2010-10-13T03:37:37+00:00

This extends the PL022 SSP/SPI driver with generic DMA engine
support using the PrimeCell DMA engine interface. Also fix up the
test code for the U300 platform.

Signed-off-by: Linus Walleij 
Signed-off-by: Grant Likely