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base-files: support parse DT LED color and function

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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>
This commit is contained in:
Shiji Yang 2023-10-31 18:47:49 +08:00 committed by coolsnowwolf
parent 1172e4c4b6
commit a4b597b221
1 changed files with 31 additions and 0 deletions
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31
package/base-files/files/lib/functions/leds.sh
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@ -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"