From e814acc59948943c776ac319a348f72c0d19f33c Mon Sep 17 00:00:00 2001
From: Shiji Yang <yangshiji66@qq.com>
Date: Tue, 31 Oct 2023 18:47:49 +0800
Subject: [PATCH] base-files: support parse DT LED color and function

The 'label' property in led node has been deprecated and we'd better
to avoid using it. This patch allows us to extract DT OF LED name
from the newly introduced LED properties "color", "function" and
"function-enumerator".

Signed-off-by: Shiji Yang <yangshiji66@qq.com>
---
 .../base-files/files/lib/functions/leds.sh    | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/package/base-files/files/lib/functions/leds.sh b/package/base-files/files/lib/functions/leds.sh
index a7532faa2f..333d900df0 100644
--- a/package/base-files/files/lib/functions/leds.sh
+++ b/package/base-files/files/lib/functions/leds.sh
@@ -11,6 +11,36 @@ get_dt_led_path() {
 	echo "$ledpath"
 }
 
+get_dt_led_color_func() {
+	local enum
+	local func
+	local idx
+	local label
+
+	[ -e "$1/function" ] && func=$(cat "$1/function")
+	[ -e "$1/color" ] && idx=$((0x$(hexdump -n 4 -e '4/1 "%02x"' "$1/color")))
+	[ -e "$1/function-enumerator" ] && \
+		enum=$((0x$(hexdump -n 4 -e '4/1 "%02x"' "$1/function-enumerator")))
+
+	[ -z "$idx" ] && [ -z "$func" ] && return 2
+
+	if [ -n "$idx" ]; then
+		for color in "white" "red" "green" "blue" "amber" \
+			     "violet" "yellow" "ir" "multicolor" "rgb" \
+			     "purple" "orange" "pink" "cyan" "lime"
+		do
+			[ $idx -eq 0 ] && label="$color" && break
+			idx=$((idx-1))
+		done
+	fi
+
+	label="$label:$func"
+	[ -n "$enum" ] && label="$label-$enum"
+	echo "$label"
+
+	return 0
+}
+
 get_dt_led() {
 	local label
 	local ledpath=$(get_dt_led_path $1)
@@ -18,6 +48,7 @@ get_dt_led() {
 	[ -n "$ledpath" ] && \
 		label=$(cat "$ledpath/label" 2>/dev/null) || \
 		label=$(cat "$ledpath/chan-name" 2>/dev/null) || \
+		label=$(get_dt_led_color_func "$ledpath") || \
 		label=$(basename "$ledpath")
 
 	echo "$label"
-- 
2.30.2