Dear Lauri Hintsala, > Hi, > > On 01/11/2013 01:43 AM, Marek Vasut wrote: > > 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@xxxxxxx> > > Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> > > Cc: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx> > > Cc: Jonathan Cameron <jic23@xxxxxxxxxx> > > Cc: Shawn Guo <shawn.guo@xxxxxxxxxx> > > --- > > > > .../bindings/staging/iio/adc/mxs-lradc.txt | 6 + > > drivers/staging/iio/adc/mxs-lradc.c | 473 > > +++++++++++++++++++- 2 files changed, 455 insertions(+), 24 > > deletions(-) > > Works fine with apx4devkit. > > Tested-by: Lauri Hintsala <lauri.hintsala@xxxxxxxxxxxx> Thanks Lauri :) Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
