linux-toradex.git/include/linux/spi, branch v2.6.18-rc7

[PATCH] SPI: infrastructure to initialize spi_device.mode early

2006-06-28T22:51:01+00:00

This patch adds earlier initialization of spi_device.mode, as needed
on boards using nondefault chipselect polarity.  An example would be
ones using the RS5C348 RTC without an external signal inverter between
the RTC chipselect and the SPI controller.

Without this mechanism, the first setup() call for that chip would
wrongly enable chips, corrupting transfers to/from other chips sharing
that SPI bus.

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

[PATCH] SPI: busnum == 0 needs to work

2006-05-16T21:33:57+00:00

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

[PATCH] SPI: devices can require LSB-first encodings

2006-05-16T21:33:57+00:00

Add spi_device hook for LSB-first word encoding, and update all the
(in-tree) controller drivers to reject such devices.  Eventually,
some controller drivers will be updated to support lsb-first encodings
on the wire; no current drivers need this.

Signed-off-by: David Brownell 
Signed-off-by: Greg Kroah-Hartman

[PATCH] SPI: Renamed bitbang_transfer_setup to spi_bitbang_setup_transfer and export it

2006-05-16T21:33:57+00:00

Renamed bitbang_transfer_setup to follow convention of other exported symbols
from spi-bitbang.  Exported spi_bitbang_setup_transfer to allow users of
spi-bitbang to use the function in their own setup_transfer.

Signed-off-by: Kumar Gala 
Cc: David Brownell 
Signed-off-by: Greg Kroah-Hartman

[PATCH] SPI: spi whitespace fixes

2006-05-16T21:33:56+00:00

This removes superfluous whitespace in the  header.

Signed-off-by: David Brownell 
Signed-off-by: Greg Kroah-Hartman

[PATCH] SPI: per-transfer overrides for wordsize and clocking

2006-05-16T21:33:56+00:00

Some protocols (like one for some bitmap displays) require different clock
speed or word size settings for each transfer in an SPI message. This adds
those parameters to struct spi_transfer.  They are to be used when they are
nonzero; otherwise the defaults from spi_device are to be used.

The patch also adds a setup_transfer callback to spi_bitbang, uses it for
messages that use those overrides, and implements it so that the pure
bitbanging code can help resolve any questions about how it should work.

Signed-off-by: Imre Deak 
Signed-off-by: David Brownell 
Signed-off-by: Greg Kroah-Hartman

Input: ads7846 - improve filtering for thumb press accuracy

2006-04-26T04:13:18+00:00

Providing more accurate coordinates for thumb press requires additional
steps in the filtering logic:

- Ignore samples found invalid by the debouncing logic, or the ones that
  have out of bound pressure value.
- Add a parameter to repeat debouncing, so that more then two consecutive
  good readings are required for a valid sample.

Signed-off-by: Imre Deak 
Acked-by: Juha Yrjola 
Signed-off-by: Dmitry Torokhov

Input: ads7846 - handle IRQs that were latched during disabled IRQs

2006-04-12T03:44:05+00:00

The pen down IRQ will toggle during each X,Y,Z measurement cycle.
Even though the IRQ is disabled it will be latched and delivered
when after enable_irq. Thus in the IRQ handler we must avoid
starting a new measurement cycle when such an "unwanted" IRQ happens.
Add a get_pendown_state platform function, which will probably
determine this by reading the current GPIO level of the pen IRQ pin.

Move the IRQ reenabling from the SPI RX function to the timer. After
the last power down message the pen IRQ pin is still active for a
while and get_pendown_state would report incorrectly a pen down state.

When suspending we should check the ts->pending flag instead of
ts->pendown, since the timer can be pending regardless of ts->pendown.
Also if ts->pending is set we can be sure that the timer is running,
so no need to rearm it. Similarly if ts->pending is not set we can
be sure that the IRQ is enabled (and the timer is not).

Signed-off-by: Imre Deak 
Signed-off-by: David Brownell 
Signed-off-by: Dmitry Torokhov

Input: ads7846 - debouncing and rudimentary sample filtering

2006-04-12T03:42:03+00:00

Some touchscreens seem to oscillate heavily for a while after touching
the screen.  Implement support for sampling the screen until we get two
consecutive values that are close enough.

Signed-off-by: Imre Deak 
Signed-off-by: Juha Yrjola 
Signed-off-by: David Brownell 
Signed-off-by: Dmitry Torokhov

[PATCH] spi: remove fastcall crap

2006-01-14T00:29:56+00:00

gcc4 generates warnings when a non-FASTCALL function pointer is assigned to a
FASTCALL one.  Perhaps it has taste.

Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman