[leds] add module for talking to a GPIO daemon

lib/32-leds-gpiod.sh

@@ -0,0 +1,49 @@
+# leds
+
+k_leds_gpiod_update() {
+ local command
+ command="$1"
+ k_log 3 "changing leds GPIO #$K_LEDS_GPIOD_NUM, $command"
+ echo "$command $K_LEDS_GPIOD_NUM" > $K_LEDS_GPIOD_FIFO
+ sleep 1
+}
+
+k_leds_gpiod_init() {
+ [ -p "$K_LEDS_GPIOD_FIFO" ] || {
+ k_log 3 "WARNING: gpiod support not found"
+ return 1
+ }
+ k_log 3 "initializing leds GPIO support"
+ k_leds_gpiod_update 'INIT'
+ return 0
+}
+
+k_leds_gpiod_blink() {
+ k_leds_gpiod_update 'BLINK'
+ k_leds_gpiod_update 'BLINK'
+}
+
+k_leds_gpiod_on() {
+ k_leds_gpiod_update 'ON'
+}
+
+k_leds_gpiod_off() {
+ k_leds_gpiod_update 'OFF'
+}
+
+k_leds_gpiod_pulse() {
+ k_leds_gpiod_update 'PULSE'
+}
+
+k_leds_gpiod_startup() {
+ k_leds_gpiod_init || \
+ return
+ k_leds_gpiod_pulse
+ k_hook_register_handler on_media_plugged k_leds_gpiod_off
+ k_hook_register_handler on_media_removed k_leds_gpiod_pulse
+ k_hook_register_handler on_copy_started k_leds_gpiod_blink
+ k_hook_register_handler on_copy_ended k_leds_gpiod_on
+ k_hook_register_handler on_app_ended k_leds_gpiod_off
+}
+
+k_hook_register_handler on_app_started k_leds_gpiod_startup