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base-files/leds: save led color value if available

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There are monochrome LEDs that can only display one color. However, there
are also LEDs that can display multiple colors. This can be tested in the
led subsystem of the kernel if the files 'multi_index' and 'multi_intensity'
are present in the folder '/sys/class/leds/<ledname>'.

Until now it was not possible to reset the default color. This commit adds
the missing information in the file '/var/run/led.state' so that the bootup
color can be seen on the LED again when the LED configuration has been changed.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>
This commit is contained in:
Florian Eckert
2024-02-01 11:17:17 +01:00
parent db9f26cfcb
commit 102855b3c1
1 changed files with 14 additions and 3 deletions
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17
package/base-files/files/etc/init.d/led
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@@ -49,11 +49,18 @@ load_led() {
[ -e /sys/class/leds/${sysfs}/brightness ] && {
echo "setting up led ${name}"
printf "%s %s %d\n" \
printf "%s %s %d" \
"$sysfs" \
"$(sed -ne 's/^.*\[\(.*\)\].*$/\1/p' /sys/class/leds/${sysfs}/trigger)" \
"$(cat /sys/class/leds/${sysfs}/brightness)" \
>> /var/run/led.state
# Save default color if supported
[ -e /sys/class/leds/${sysfs}/multi_intensity ] && {
printf " %s" \
"$(sed 's/\ /:/g' /sys/class/leds/${sysfs}/multi_intensity)" \
>> /var/run/led.state
}
printf "\n" >> /var/run/led.state
[ "$default" = 0 ] &&
echo 0 >/sys/class/leds/${sysfs}/brightness
@@ -128,13 +135,17 @@ load_led() {
start() {
[ -e /sys/class/leds/ ] && {
[ -s /var/run/led.state ] && {
local led trigger brightness
while read led trigger brightness; do
local led trigger brightness color
while read led trigger brightness color; do
[ -e "/sys/class/leds/$led/trigger" ] && \
echo "$trigger" > "/sys/class/leds/$led/trigger"
[ -e "/sys/class/leds/$led/brightness" ] && \
echo "$brightness" > "/sys/class/leds/$led/brightness"
[ -e "/sys/class/leds/$led/multi_intensity" ] && \
echo "$color" | sed 's/:/\ /g' > \
"/sys/class/leds/$led/multi_intensity"
done < /var/run/led.state
rm /var/run/led.state
}