tree 84898e187b5128e1e51e9f5ed41114176181b71e
parent 648b15cb79e90d80f7b53d0184bdb14132a03754
author Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> 1444804790 -0700
committer Dmitry Torokhov <dmitry.torokhov@gmail.com> 1445034738 -0700

Input: rotary-encoder - add support for quarter-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 driver used to
support the former states and with this change it can also support the
later.

This commit also 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.

Signed-off-by: Guido Martínez <guido@vanguardiasur.com.ar>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>