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