[openwrt/openwrt] base-files: add support for heartbeat led trigger

[LEDE Commits]

chunkeey pushed a commit to openwrt/openwrt.git, branch openwrt-21.02:
https://git.openwrt.org/1ea34b9621fafa916e0d4ca0b6ec97ac8a611ba9

commit 1ea34b9621fafa916e0d4ca0b6ec97ac8a611ba9
Author: Alexey Smirnov <s.alexey at gmail.com>
AuthorDate: Tue Jan 4 10:11:51 2022 +0300

    base-files: add support for heartbeat led trigger
    
    This patch adds support for creation heartbeat led trigger with,
    for example, this command:
    
            ucidef_set_led_heartbeat "..." "..." "..."
    
    from /etc/board.d/01_leds.
    
    Signed-off-by: Alexey Smirnov <s.alexey at gmail.com>
    (cherry picked from commit 66071729a27919e555752fce25210b1b035eb319)
---
 package/base-files/files/lib/functions/uci-defaults.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/package/base-files/files/lib/functions/uci-defaults.sh b/package/base-files/files/lib/functions/uci-defaults.sh
index 02882f43ca..f96e645e73 100644
--- a/package/base-files/files/lib/functions/uci-defaults.sh
+++ b/package/base-files/files/lib/functions/uci-defaults.sh
@@ -418,6 +418,15 @@ ucidef_set_led_default() {
 	json_select ..
 }
 
+ucidef_set_led_heartbeat() {
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string trigger heartbeat
+	json_select ..
+
+	json_select ..
+}
+
 ucidef_set_led_gpio() {
 	local gpio="$4"
 	local inverted="$5"