package/base-files/files/lib/functions/leds.sh

   1 # Copyright (C) 2013 OpenWrt.org
   2
   3 get_dt_led_path() {
   4         local ledpath
   5         local basepath="/proc/device-tree"
   6         local nodepath="$basepath/aliases/led-$1"
   7
   8         [ -f "$nodepath" ] && ledpath=$(cat "$nodepath")
   9         [ -n "$ledpath" ] && ledpath="$basepath$ledpath"
  10
  11         echo "$ledpath"
  12 }
  13
  14 get_dt_led() {
  15         local label
  16         local of_path
  17         local ledpath=$(get_dt_led_path $1)
  18
  19         [ -n "$ledpath" ] && {
  20                 label=$(cat "$ledpath/label" 2>/dev/null) || \
  21                 label=$(cat "$ledpath/chan-name" 2>/dev/null) || \
  22                 label=$(basename "$ledpath")
  23
  24                 [ -d "/sys/class/leds/$label" ] || {
  25                         label=""
  26                         for node in /sys/class/leds/*; do
  27                                 of_path=$(grep OF_FULLNAME "$node/uevent" | cut -f2 -d'=')
  28                                 [ "/proc/device-tree$of_path" = "$ledpath" ] && {
  29                                         label=$(basename "$node")
  30                                         break
  31                                 }
  32                         done
  33                 }
  34         }
  35
  36         echo "$label"
  37 }
  38
  39 led_set_attr() {
  40         [ -f "/sys/class/leds/$1/$2" ] && echo "$3" > "/sys/class/leds/$1/$2"
  41 }
  42
  43 led_timer() {
  44         led_set_attr $1 "trigger" "timer"
  45         led_set_attr $1 "delay_on" "$2"
  46         led_set_attr $1 "delay_off" "$3"
  47 }
  48
  49 led_on() {
  50         led_set_attr $1 "trigger" "none"
  51         led_set_attr $1 "brightness" 255
  52 }
  53
  54 led_off() {
  55         led_set_attr $1 "trigger" "none"
  56         led_set_attr $1 "brightness" 0
  57 }
  58
  59 status_led_restore_trigger() {
  60         local trigger
  61         local ledpath=$(get_dt_led_path $1)
  62
  63         [ -n "$ledpath" ] && \
  64                 trigger=$(cat "$ledpath/linux,default-trigger" 2>/dev/null)
  65
  66         [ -n "$trigger" ] && \
  67                 led_set_attr "$(get_dt_led $1)" "trigger" "$trigger"
  68 }
  69
  70 status_led_set_timer() {
  71         led_timer $status_led "$1" "$2"
  72         [ -n "$status_led2" ] && led_timer $status_led2 "$1" "$2"
  73 }
  74
  75 status_led_set_heartbeat() {
  76         led_set_attr $status_led "trigger" "heartbeat"
  77 }
  78
  79 status_led_on() {
  80         led_on $status_led
  81         [ -n "$status_led2" ] && led_on $status_led2
  82 }
  83
  84 status_led_off() {
  85         led_off $status_led
  86         [ -n "$status_led2" ] && led_off $status_led2
  87 }
  88
  89 status_led_blink_slow() {
  90         led_timer $status_led 1000 1000
  91 }
  92
  93 status_led_blink_fast() {
  94         led_timer $status_led 100 100
  95 }
  96
  97 status_led_blink_preinit() {
  98         led_timer $status_led 100 100
  99 }
 100
 101 status_led_blink_failsafe() {
 102         led_timer $status_led 50 50
 103 }
 104
 105 status_led_blink_preinit_regular() {
 106         led_timer $status_led 200 200
 107 }