On Thu, May 19, 2016 at 02:34:00PM +0530, Vignesh R wrote: > There are rotary-encoders where GPIO lines reflect the actual position > of the rotary encoder dial. For example, if dial points to 9, then four > GPIO lines connected to the rotary encoder will read HLLH(1001b = 9). > Add support for such rotary-encoder. > The driver relies on rotary-encoder,absolute-encoder DT property to > detect such encoders. > Since, GPIO IRQs are not necessary to work with > such encoders, optional polling mode support is added using > input_poll_dev skeleton. This is can be used by enabling > CONFIG_INPUT_GPIO_ROTARY_ENCODER_POLL_MODE_SUPPORT. > > Signed-off-by: Vignesh R <vigneshr@xxxxxx> > --- > .../devicetree/bindings/input/rotary-encoder.txt | 4 + > Documentation/input/rotary-encoder.txt | 9 ++ > drivers/input/misc/Kconfig | 11 ++ > drivers/input/misc/rotary_encoder.c | 165 ++++++++++++++++----- > 4 files changed, 155 insertions(+), 34 deletions(-) > > diff --git a/Documentation/devicetree/bindings/input/rotary-encoder.txt b/Documentation/devicetree/bindings/input/rotary-encoder.txt > index 6c9f0c8a846c..9c928dbd1500 100644 > --- a/Documentation/devicetree/bindings/input/rotary-encoder.txt > +++ b/Documentation/devicetree/bindings/input/rotary-encoder.txt > @@ -12,6 +12,10 @@ Optional properties: > - rotary-encoder,relative-axis: register a relative axis rather than an > absolute one. Relative axis will only generate +1/-1 events on the input > device, hence no steps need to be passed. > +- rotary-encoder,absolute-encoder: support encoders where GPIO lines > + reflect the actual position of the rotary encoder dial. For example, > + if dial points to 9, then four GPIO lines read HLLH(1001b = 9). > + In this case, rotary-encoder,steps-per-period needed not be defined. I think this should be done as a new compatible string rather than a property. It seems like fundamentally different h/w. Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
