Marek Vasut 06ddd353f5 iio: mxs: Implement support for touchscreen ... This patch implements support for sampling of a touchscreen into the MXS LRADC driver. The LRADC block allows configuring some of it's channels into special mode where they either output the drive voltage or sample it, allowing it to operate a 4-wire or 5-wire resistive touchscreen. In case the touchscreen mode is enabled, the LRADC slot #7 is reserved for touchscreen only, therefore it is not possible to sample 8 LRADC channels at time, but only 7 channels. The touchscreen controller is configured such that the PENDOWN event disables touchscreen interrupts and triggers execution of worker thread, which then polls the touchscreen controller for X, Y and Pressure values. This reduces the overhead of interrupt-driven operation. Upon the PENUP event, the worker thread re-enables the PENDOWN detection interrupt and exits. Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>		2013-01-26 10:07:46 +00:00
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bindings	iio: mxs: Implement support for touchscreen	2013-01-26 10:07:46 +00:00
00-INDEX	Documentation: add devicetree docs index file	2011-03-16 10:47:03 -07:00
booting-without-of.txt	dt/documentation: Fix value format description	2012-05-19 15:03:28 -06:00
usage-model.txt	Documentation: correct of_platform_populate() argument list	2012-11-21 15:53:23 +00:00