[openwrt/openwrt] base-files: add option to set LED brightness

[LEDE Commits]

blogic pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/cbdfd03e42f5619127d357eaba48b77f62628654

commit cbdfd03e42f5619127d357eaba48b77f62628654
Author: Paweł Owoc <frut3k7 at gmail.com>
AuthorDate: Fri Dec 6 17:11:59 2024 +0100

    base-files: add option to set LED brightness
    
    Add option to set LED brightness via uci:
    
    config led 'led_blue'
            option name 'blue'
            option sysfs 'blue:status'
            option brightness '1'
    
    Signed-off-by: Paweł Owoc <frut3k7 at gmail.com>
    
    Link: https://github.com/openwrt/openwrt/pull/17190
    Signed-off-by: John Crispin <john at phrozen.org>
---
 package/base-files/files/etc/init.d/led | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/package/base-files/files/etc/init.d/led b/package/base-files/files/etc/init.d/led
index 377b9dcf3e..d292e2a8dd 100755
--- a/package/base-files/files/etc/init.d/led
+++ b/package/base-files/files/etc/init.d/led
@@ -51,6 +51,7 @@ load_led() {
 	local delayon
 	local delayoff
 	local interval
+	local brightness
 
 	config_get sysfs $1 sysfs
 	config_get name $1 name "$sysfs"
@@ -67,6 +68,7 @@ load_led() {
 	config_get message $1 message ""
 	config_get gpio $1 gpio "0"
 	config_get_bool inverted $1 inverted "0"
+	config_get brightness $1 brightness
 
 	[ "$2" ] && [ "$sysfs" != "$2" ] && return
 
@@ -105,7 +107,8 @@ load_led() {
 			echo 0 >/sys/class/leds/${sysfs}/brightness
 
 		[ $default = 1 ] &&
-			cat /sys/class/leds/${sysfs}/max_brightness > /sys/class/leds/${sysfs}/brightness
+			[ -z "$brightness" ] && brightness=$(cat /sys/class/leds/${sysfs}/max_brightness)
+			echo $brightness > /sys/class/leds/${sysfs}/brightness
 
 		led_color_set "$1" "$sysfs"