apm821xx: implement new LED label naming scheme

This patch updates all current APM82181 devices over to that
"new LED naming scheme". This includes many updates to the
device-tree:
	- dropped the deprecated, but beloved "label" property.
	- rename all DT leds node names to led-#.
	- add function and color properties.
	- utilized panic-indicator property.
	- dropped led- aliases (see below).

migration scripts for all devices are included.

For more information. See:
<https://www.kernel.org/doc/html/latest/leds/leds-class.html>

For the future: It looks like the color+function properties
won over the dt-alias / label. This will need to be wired up
into openwrt eventually. For APM821xx the situation is that
all devices have a dedicated power and fault indicator.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/target/linux/apm821xx/base-files/etc/diag.sh b/target/linux/apm821xx/base-files/etc/diag.sh
new file mode 100644
index 0000000000..9a2f4202bb
--- /dev/null
+++ b/target/linux/apm821xx/base-files/etc/diag.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-only
+
+. /lib/functions/leds.sh
+
+get_status_led() {
+	local status_led_file
+
+	status_led_file=$(find /sys/class/leds/ -name "*:power" | head -n1)
+	if [ -d "$status_led_file" ]; then
+		basename $status_led_file
+		return
+	fi;
+}
+
+get_failsafe_led() {
+	local status_led_file
+
+	status_led_file=$(find /sys/class/leds/ -name "*:fault" | head -n1)
+	if [ -d "$status_led_file" ]; then
+		basename $status_led_file
+		return
+	fi;
+}
+
+set_state() {
+	status_led=$(get_status_led)
+
+	[ -z "$status_led" ] && return
+
+	case "$1" in
+	preinit)
+		status_led_blink_preinit
+		;;
+	failsafe)
+		status_led_off
+		status_led=$(get_failsafe_led)
+		status_led_blink_failsafe
+		;;
+	preinit_regular)
+		status_led_blink_preinit_regular
+		;;
+        upgrade)
+                status_led_blink_preinit_regular
+                ;;
+	done)
+		status_led_on
+		;;
+	esac
+}