From e75bd408d9bb092dee1f071283d3d4f8b8f46a57 Mon Sep 17 00:00:00 2001
From: Calin Crisan <ccrisan@gmail.com>
Date: Sun, 5 Jun 2016 11:34:56 +0300
Subject: [PATCH] raspberrypi: brownout detector uses now the /sys/class/leds
 interface

---
 board/raspberrypi/overlay/etc/init.d/S11brownout | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/board/raspberrypi/overlay/etc/init.d/S11brownout b/board/raspberrypi/overlay/etc/init.d/S11brownout
index 798f1a15b4..80a256d157 100755
--- a/board/raspberrypi/overlay/etc/init.d/S11brownout
+++ b/board/raspberrypi/overlay/etc/init.d/S11brownout
@@ -1,16 +1,12 @@
 #!/bin/bash
 
-gpio=35
 check_interval=30
-export=/sys/class/gpio/export
-readv=/sys/class/gpio/gpio$gpio/value
+readv=/sys/class/leds/led1/brightness
+
+test -e "$readv" || exit 0
 
 test -n "$os_version" || source /etc/init.d/base
 
-configure() {
-    echo $gpio > $export
-}
-
 watch() {
     while true; do
         if [ "$(cat $readv)" == "0" ]; then
@@ -23,9 +19,8 @@ watch() {
 case "$1" in
     start)
         msg_begin "Starting brownout detector"
-        configure
-        test $? == 0 && msg_done || msg_fail
         watch &
+        test $? == 0 && msg_done || msg_fail
         ;;
 
     stop)