On Fri, Oct 9, 2015 at 8:46 AM, Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx> wrote: > This commit deprecates the 'half-period' property and introduces > a new property 'steps-per-period'. This property specifies the > number of steps (stable states) produced by the rotary encoder > for each GPIO period. > > Such a property is required to accurately describe all kinds of > rotary-encoders devices. > > Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx> Acked-by: Rob Herring <robh@xxxxxxxxxx> Are there any in tree dts's using the deprecated property? If so, please update them. Rob > --- > Documentation/devicetree/bindings/input/rotary-encoder.txt | 9 +++++++++ > Documentation/input/rotary-encoder.txt | 8 ++++++-- > 2 files changed, 15 insertions(+), 2 deletions(-) > > diff --git a/Documentation/devicetree/bindings/input/rotary-encoder.txt b/Documentation/devicetree/bindings/input/rotary-encoder.txt > index 331549593ed5..5715ad70d28e 100644 > --- a/Documentation/devicetree/bindings/input/rotary-encoder.txt > +++ b/Documentation/devicetree/bindings/input/rotary-encoder.txt > @@ -14,7 +14,16 @@ Optional properties: > device, hence no steps need to be passed. > - rotary-encoder,rollover: Automatic rollove when the rotary value becomes > greater than the specified steps or smaller than 0. For absolute axis only. > +- rotary-encoder,steps-per-period: Number of steps (stable states) per period. > + The values have the following meaning: > + 1: Full-period mode (default) > + 2: Half-period mode > + 4: Quarter-period mode > + > +Deprecated properties: > - rotary-encoder,half-period: Makes the driver work on half-period mode. > + This property is deprecated. Instead, a 'steps-per-period ' value should > + be used, such as "rotary-encoder,steps-per-period = <2>". > > See Documentation/input/rotary-encoder.txt for more information. > > diff --git a/Documentation/input/rotary-encoder.txt b/Documentation/input/rotary-encoder.txt > index 5737e3590adb..00acf88e4064 100644 > --- a/Documentation/input/rotary-encoder.txt > +++ b/Documentation/input/rotary-encoder.txt > @@ -9,8 +9,9 @@ peripherals with two wires. The outputs are phase-shifted by 90 degrees > and by triggering on falling and rising edges, the turn direction can > be determined. > > -Some encoders have both outputs low in stable states, whereas others also have > -a stable state with both outputs high (half-period mode). > +Some encoders have both outputs low in stable states, others also have > +a stable state with both outputs high (half-period mode) and some have > +a stable state in all steps (quarter-period mode). > > The phase diagram of these two outputs look like this: > > @@ -32,6 +33,9 @@ The phase diagram of these two outputs look like this: > |<-->| > one step (half-period mode) > > + |<>| > + one step (quarter-period mode) > + > For more information, please see > https://en.wikipedia.org/wiki/Rotary_encoder > > -- > 2.5.2 > -- 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
