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Input: wm831x - add driver for Wolfson WM831x PMIC touchscreen controllers

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Some of the WM831x series of PMICs from Wolfson Microelectronics include
a resistive touchscreen controller. Implement support for these controllers
within the input API.

Platform data is supported to allow configuration of system parameters such
as selection between four and five wire touchscreens and for specification
of optional direct to CPU IRQs for sample availability and for pen down.
Use of this feature for at least the data IRQ is strongly recommended.

Thanks to Julien Boibessot for extensive testing and detailed feedback.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Tested-by: Julien Boibessot <julien.boibessot@armadeus.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Mark Brown
2011-01-30 12:31:30 -08:00
committed by Dmitry Torokhov
parent 3c36e71903
commit 00cfa730db
4 changed files with 368 additions and 1 deletions
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10
drivers/input/touchscreen/Kconfig
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@@ -423,6 +423,16 @@ config TOUCHSCREEN_UCB1400
To compile this driver as a module, choose M here: the
module will be called ucb1400_ts.
config TOUCHSCREEN_WM831X
tristate "Support for WM831x touchscreen controllers"
depends on MFD_WM831X
help
This enables support for the touchscreen controller on the WM831x
series of PMICs.
To compile this driver as a module, choose M here: the
module will be called wm831x-ts.
config TOUCHSCREEN_WM97XX
tristate "Support for WM97xx AC97 touchscreen controllers"
depends on AC97_BUS