OpenWrt – Rev 4
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From d61d506099a7e3dc2823927c89ac56478ef9f3a5 Mon Sep 17 00:00:00 2001
From: Ismael Asensio <isma.af@gmail.com>
Date: Sun, 18 Feb 2018 18:53:58 +0100
Subject: [PATCH 218/454] Generic Rotary Encoder overlay for multiple instances
(#2388)
Modify the rotary-encoder overlay to support multiple instances.
---
arch/arm/boot/dts/overlays/README | 4 +-
.../dts/overlays/rotary-encoder-overlay.dts | 54 +++++++++++--------
2 files changed, 33 insertions(+), 25 deletions(-)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1345,9 +1345,9 @@ Params: <None>
Name: rotary-encoder
Info: Overlay for GPIO connected rotary encoder.
Load: dtoverlay=rotary-encoder,<param>=<val>
-Params: rotary0_pin_a GPIO connected to rotary encoder channel A
+Params: pin_a GPIO connected to rotary encoder channel A
(default 4).
- rotary0_pin_b GPIO connected to rotary encoder channel B
+ pin_b GPIO connected to rotary encoder channel B
(default 17).
relative_axis register a relative axis rather than an
absolute one. Relative axis will only
--- a/arch/arm/boot/dts/overlays/rotary-encoder-overlay.dts
+++ b/arch/arm/boot/dts/overlays/rotary-encoder-overlay.dts
@@ -8,7 +8,7 @@
fragment@0 {
target = <&gpio>;
__overlay__ {
- rotary0_pins: rotary0_pins {
+ rotary_pins: rotary_pins@4 {
brcm,pins = <4 17>; /* gpio 4 17 */
brcm,function = <0 0>; /* input */
brcm,pull = <2 2>; /* pull-up */
@@ -20,32 +20,40 @@
fragment@1 {
target-path = "/";
__overlay__ {
- rotary0: rotary@0 {
- compatible = "rotary-encoder";
- status = "okay";
- pinctrl-names = "default";
- pinctrl-0 = <&rotary0_pins>;
- gpios = <&gpio 4 0>, <&gpio 17 0>;
- linux,axis = <0>; /* REL_X */
- rotary-encoder,encoding = "gray";
- rotary-encoder,steps = <24>; /* 24 default */
- rotary-encoder,steps-per-period = <1>; /* corresponds to full period mode. See README */
+ rotary: rotary@4 {
+ compatible = "rotary-encoder";
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&rotary_pins>;
+ gpios = <&gpio 4 0>, <&gpio 17 0>;
+ linux,axis = <0>; /* REL_X */
+ rotary-encoder,encoding = "gray";
+ rotary-encoder,steps = <24>; /* 24 default */
+ rotary-encoder,steps-per-period = <1>; /* corresponds to full period mode. See README */
};
};
};
__overrides__ {
- rotary0_pin_a = <&rotary0>,"gpios:4",
- <&rotary0_pins>,"brcm,pins:0";
- rotary0_pin_b = <&rotary0>,"gpios:16",
- <&rotary0_pins>,"brcm,pins:4";
- relative_axis = <&rotary0>,"rotary-encoder,relative-axis?";
- linux_axis = <&rotary0>,"linux,axis:0";
- rollover = <&rotary0>,"rotary-encoder,rollover?";
- steps-per-period = <&rotary0>,"rotary-encoder,steps-per-period:0";
- steps = <&rotary0>,"rotary-encoder,steps:0";
- wakeup = <&rotary0>,"wakeup-source?";
- encoding = <&rotary0>,"rotary-encoder,encoding";
- };
+ pin_a = <&rotary>,"gpios:4",
+ <&rotary_pins>,"brcm,pins:0",
+ /* modify reg values to allow multiple instantiation */
+ <&rotary>,"reg:0",
+ <&rotary_pins>,"reg:0";
+ pin_b = <&rotary>,"gpios:16",
+ <&rotary_pins>,"brcm,pins:4";
+ relative_axis = <&rotary>,"rotary-encoder,relative-axis?";
+ linux_axis = <&rotary>,"linux,axis:0";
+ rollover = <&rotary>,"rotary-encoder,rollover?";
+ steps-per-period = <&rotary>,"rotary-encoder,steps-per-period:0";
+ steps = <&rotary>,"rotary-encoder,steps:0";
+ wakeup = <&rotary>,"wakeup-source?";
+ encoding = <&rotary>,"rotary-encoder,encoding";
+ /* legacy parameters*/
+ rotary0_pin_a = <&rotary>,"gpios:4",
+ <&rotary_pins>,"brcm,pins:0";
+ rotary0_pin_b = <&rotary>,"gpios:16",
+ <&rotary_pins>,"brcm,pins:4";
+ };
};