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76 lines
3.5 KiB
Diff
76 lines
3.5 KiB
Diff
6 years ago
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From 8cf805e57fa5cf4c872883968def037cd7c903cc Mon Sep 17 00:00:00 2001
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From: Aaron Shaw <shawaj@gmail.com>
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Date: Fri, 5 Jan 2018 15:08:37 +0000
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Subject: [PATCH 158/454] add additional overrides to rotary-encoder overlay
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(#2334)
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---
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arch/arm/boot/dts/overlays/README | 23 +++++++++++++++++++
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.../dts/overlays/rotary-encoder-overlay.dts | 18 +++++++++++----
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2 files changed, 36 insertions(+), 5 deletions(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -1331,6 +1331,29 @@ Params: rotary0_pin_a GPIO con
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(default 4).
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rotary0_pin_b GPIO connected to rotary encoder channel B
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(default 17).
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+ relative_axis register a relative axis rather than an
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+ absolute one. Relative axis will only
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+ generate +1/-1 events on the input device,
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+ hence no steps need to be passed.
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+ linux_axis the input subsystem axis to map to this
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+ rotary encoder. Defaults to 0 (ABS_X / REL_X)
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+ rollover Automatic rollover when the rotary value
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+ becomes greater than the specified steps or
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+ smaller than 0. For absolute axis only.
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+ steps-per-period Number of steps (stable states) per period.
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+ The values have the following meaning:
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+ 1: Full-period mode (default)
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+ 2: Half-period mode
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+ 4: Quarter-period mode
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+ steps Number of steps in a full turnaround of the
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+ encoder. Only relevant for absolute axis.
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+ Defaults to 24 which is a typical value for
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+ such devices.
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+ wakeup Boolean, rotary encoder can wake up the
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+ system.
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+ encoding String, the method used to encode steps.
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+ Supported are "gray" (the default and more
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+ common) and "binary".
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Name: rpi-backlight
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--- a/arch/arm/boot/dts/overlays/rotary-encoder-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/rotary-encoder-overlay.dts
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@@ -28,16 +28,24 @@
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gpios = <&gpio 4 0>, <&gpio 17 0>;
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linux,axis = <0>; /* REL_X */
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rotary-encoder,encoding = "gray";
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- rotary-encoder,relative-axis;
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+ rotary-encoder,steps = <24>; /* 24 default */
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+ rotary-encoder,steps-per-period = <1>; /* corresponds to full period mode. See README */
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};
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};
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};
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__overrides__ {
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- rotary0_pin_a = <&rotary0>,"gpios:4",
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- <&rotary0_pins>,"brcm,pins:0";
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- rotary0_pin_b = <&rotary0>,"gpios:16",
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- <&rotary0_pins>,"brcm,pins:4";
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+ rotary0_pin_a = <&rotary0>,"gpios:4",
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+ <&rotary0_pins>,"brcm,pins:0";
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+ rotary0_pin_b = <&rotary0>,"gpios:16",
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+ <&rotary0_pins>,"brcm,pins:4";
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+ relative_axis = <&rotary0>,"rotary-encoder,relative-axis?";
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+ linux_axis = <&rotary0>,"linux,axis:0";
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+ rollover = <&rotary0>,"rotary-encoder,rollover?";
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+ steps-per-period = <&rotary0>,"rotary-encoder,steps-per-period:0";
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+ steps = <&rotary0>,"rotary-encoder,steps:0";
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+ wakeup = <&rotary0>,"wakeup-source?";
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+ encoding = <&rotary0>,"rotary-encoder,encoding";
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};
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};
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