distro: add event handling of KEY_VOLUMEUP and KEY_VOLUMEDOWN pressed at boot

Author: SuMere

debos-recipes/overlays/arduino-unoq-releases/etc/systemd/system/key_events.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Provides bindings for volumeup and volumedown keys on boot
+After=multi-user.target
+
+[Service]
+Type=oneshot
+ExecStart=/opt/arduino/scripts/keybinding_check.sh
+
+[Install]
+WantedBy=multi-user.target

debos-recipes/overlays/arduino-unoq-releases/opt/arduino/scripts/keybinding_check.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+function check_key()
+{
+    device=$1
+    event=$2
+    keycode=$3
+
+    evtest --query ${device} ${event} ${keycode}
+
+    ret_val=$?
+    echo $ret_val
+}
+
+exec_path_vold="/opt/arduino/scripts/volumedown.sh"
+exec_path_volu="/opt/arduino/scripts/volumeup.sh"
+
+volumedown=$(check_key /dev/input/event0 EV_KEY KEY_VOLUMEDOWN)
+volumeup=$(check_key /dev/input/event0 EV_KEY KEY_VOLUMEUP)
+
+echo "Volume Down status: ${volumedown}"
+echo "Volume Up status: ${volumeup}"
+
+if [ $volumeup -ne 0 ] && [ $volumedown -ne 0 ]; then
+    echo "Both Volume Up and Volume Down keys are pressed. Ignoring both."
+    exit 0
+fi
+
+if [ ${volumedown} -ne 0 ]; then
+    bash ${exec_path_vold}
+elif [ ${volumeup} -ne 0 ]; then
+    bash ${exec_path_volu}
+fi

debos-recipes/overlays/arduino-unoq-releases/opt/arduino/scripts/volumedown.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# This script is triggered when the pin configured as Volume Down in JCTL connector is shorted to GND.
+# This script is launched once at startup.
+# Feel free to hack it to implement your own functionality.
+# Otherwise, it will switch the USB mode to Host.
+#
+#         MPU POWER   o  o  1V8
+#
+#         MPU RESET   o  ■  GND
+#
+#                TX   o  o  VOLUME UP
+#
+#                RX   o  o  VOLUME DOWN
+#                        |
+#          USB BOOT   o  ■  GND
+
+echo "host" > /sys/kernel/debug/usb/4e00000.usb/mode

debos-recipes/overlays/arduino-unoq-releases/opt/arduino/scripts/volumeup.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# This script is triggered when the pin configured as Volume Up in JCTL connector is shorted to GND.
+# This script is launched once at startup.
+# Feel free to hack it to implement your own functionality.
+# Otherwise, it will switch the USB mode to Device.
+#
+#         MPU POWER   o  o  1V8
+#
+#         MPU RESET   o  ■  GND
+#                        |
+#                TX   o  o  VOLUME UP
+#
+#                RX   o  o  VOLUME DOWN
+#
+#          USB BOOT   o  ■  GND
+
+echo "device" > /sys/kernel/debug/usb/4e00000.usb/mode