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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2016-07-28 00:36:26 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2016-07-28 04:26:10 +0300
commitd205a2185938e38c8667405dc44cd6221c71682e (patch)
treeaa63808e9391f23d9c722b00ed25a411509dc91a /Documentation/devicetree/bindings/input
parentf712a5a05228058f6b74635546549d4a46e117fc (diff)
downloadlinux-d205a2185938e38c8667405dc44cd6221c71682e.tar.xz
Input: rotary_encoder - support binary encoding of states
It's not advisable to use this encoding, but to support existing devices add support for this to the driver. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation/devicetree/bindings/input')
-rw-r--r--Documentation/devicetree/bindings/input/rotary-encoder.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/rotary-encoder.txt b/Documentation/devicetree/bindings/input/rotary-encoder.txt
index 6c9f0c8a846c..e85ce3dea480 100644
--- a/Documentation/devicetree/bindings/input/rotary-encoder.txt
+++ b/Documentation/devicetree/bindings/input/rotary-encoder.txt
@@ -20,6 +20,8 @@ Optional properties:
2: Half-period mode
4: Quarter-period mode
- wakeup-source: Boolean, rotary encoder can wake up the system.
+- rotary-encoder,encoding: String, the method used to encode steps.
+ Supported are "gray" (the default and more common) and "binary".
Deprecated properties:
- rotary-encoder,half-period: Makes the driver work on half-period mode.
@@ -34,6 +36,7 @@ Example:
compatible = "rotary-encoder";
gpios = <&gpio 19 1>, <&gpio 20 0>; /* GPIO19 is inverted */
linux,axis = <0>; /* REL_X */
+ rotary-encoder,encoding = "gray";
rotary-encoder,relative-axis;
};
@@ -42,5 +45,6 @@ Example:
gpios = <&gpio 21 0>, <&gpio 22 0>;
linux,axis = <1>; /* ABS_Y */
rotary-encoder,steps = <24>;
+ rotary-encoder,encoding = "binary";
rotary-encoder,rollover;
};