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From 62ae8907efb221f232126726bf4df5c9da23a8b4 Mon Sep 17 00:00:00 2001
From: Jesse Taube <Mr.Bossman075@gmail.com>
Date: Thu, 8 Jul 2021 16:32:16 -0400
Subject: [PATCH] overlays: Add overlay for cap1106 capacitive touch
sensor
Signed-off-by: Jesse Taube <mr.bossman075@gmail.com>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 6 +++
.../arm/boot/dts/overlays/cap1106-overlay.dts | 52 +++++++++++++++++++
3 files changed, 59 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/cap1106-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -30,6 +30,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
audiosense-pi.dtbo \
audremap.dtbo \
balena-fin.dtbo \
+ cap1106.dtbo \
chipdip-i2s-master-dac.dtbo \
cma.dtbo \
dht11.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -622,6 +622,12 @@ Info: This overlay is now deprecated -
Load: <Deprecated>
+Name: cap1106
+Info: Enables the ability to use the cap1106 touch sensor as a keyboard
+Load: dtoverlay=cap1106,<param>=<val>
+Params: int_pin GPIO pin for interrupt signal (default 23)
+
+
Name: chipdip-i2s-master-dac
Info: Configures Raspberry PI to work as I2S slave with BCLK=64Fs.
Load: dtoverlay=chipdip-i2s-master-dac
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/cap1106-overlay.dts
@@ -0,0 +1,52 @@
+// Overlay for cap1106 from Microchip Semiconductor
+// add CONFIG_KEYBOARD_CAP11XX=y
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+ fragment@0 {
+ target = <&i2c1>;
+ __overlay__{
+ status = "okay";
+ cap1106: cap1106@28 {
+ compatible = "microchip,cap1106";
+ pinctrl-0 = <&cap1106_pins>;
+ pinctrl-names = "default";
+ interrupt-parent = <&gpio>;
+ interrupts = <4 2>;
+ reg = <0x28>;
+ autorepeat;
+ microchip,sensor-gain = <2>;
+
+ linux,keycodes = <2>, /* KEY_1 */
+ <3>, /* KEY_2 */
+ <4>, /* KEY_3 */
+ <5>, /* KEY_4 */
+ <6>, /* KEY_5 */
+ <7>; /* KEY_6 */
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ };
+ };
+ };
+ fragment@1 {
+ target = <&gpio>;
+ __overlay__ {
+ cap1106_pins: cap1106_pins {
+ brcm,pins = <4>;
+ brcm,function = <0>; /* in */
+ brcm,pull = <0>; /* none */
+ };
+ };
+ };
+
+ __overrides__ {
+ int_pin = <&cap1106>, "interrupts:0",
+ <&cap1106_pins>, "brcm,pins:0";
+ };
+};
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