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ARM: dts: sun7i: Olimex A20-SOM-EVB: Add LRADC keys 

The Olimex A20-SOM-EVB is an evaluation board for the Olimex
A20-SOM system-on-module.  It provides a set of android-style
buttons (labeled "VOL+", "VOL-", "MENU", "SEARCH", "HOME", "ESC"
and "ENTER") which are connected to a low-resolution ADC via a
resistor network.

This patch adds appropriate button definitions to the board
dts. The voltages assigned to the keys are specified in the
board schematics published by the manufacturer.

Signed-off-by: Karsten Merker <merker@debian.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Karsten Merker 2015-12-10 21:31:59 +01:00 committed by Maxime Ripard
parent 6f353f61e2
commit 15228f04de
1 changed files with 56 additions and 0 deletions
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56
arch/arm/boot/dts/sun7i-a20-olimex-som-evb.dts
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@ -1,5 +1,6 @@
/*
* Copyright 2015 - Marcus Cooper <codekipper@gmail.com>
* Copyright 2015 - Karsten Merker <merker@debian.org>
*
* This file is dual-licensed: you can use it either under the terms
* of the GPL or the X11 license, at your option. Note that this dual
@ -45,6 +46,7 @@
#include "sunxi-common-regulators.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/pinctrl/sun4i-a10.h>
@ -114,6 +116,60 @@ axp209: pmic@34 {
};
};
&lradc {
vref-supply = <&reg_vcc3v0>;
status = "okay";
button@190 {
label = "Volume Up";
linux,code = <KEY_VOLUMEUP>;
channel = <0>;
voltage = <190000>;
};
button@390 {
label = "Volume Down";
linux,code = <KEY_VOLUMEDOWN>;
channel = <0>;
voltage = <390000>;
};
button@600 {
label = "Menu";
linux,code = <KEY_MENU>;
channel = <0>;
voltage = <600000>;
};
button@800 {
label = "Search";
linux,code = <KEY_SEARCH>;
channel = <0>;
voltage = <800000>;
};
button@980 {
label = "Home";
linux,code = <KEY_HOMEPAGE>;
channel = <0>;
voltage = <980000>;
};
button@1180 {
label = "Esc";
linux,code = <KEY_ESC>;
channel = <0>;
voltage = <1180000>;
};
button@1400 {
label = "Enter";
linux,code = <KEY_ENTER>;
channel = <0>;
voltage = <1400000>;
};
};
&mmc0 {
pinctrl-names = "default";
pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin_reference_design>;