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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 Christian Lamparter
parent 6c41c585e3
commit e814acc599
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"