From e2fd1adaf57800bb2a6e20bd59a02e76eb6d7f89 Mon Sep 17 00:00:00 2001
From: John Crispin <john@openwrt.org>
Date: Mon, 8 Feb 2016 08:25:53 +0000
Subject: [PATCH] base-files: For sysfixtime use hwclock if RTC available
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On systems that have an RTC prefer it to the file-based time fixup (i.e.
use hwclock when there is a permanent clock instead of the faked up time
logic that is needed when there is not RTC).

We can't rely on hctosys kernel feature either as we're usually using
RTC as kernel modules which are usually being loaded after hctosys was
run, leading in the following error:

  hctosys: unable to open rtc device (rtc0)

Signed-off-by: Daniel Dickinson <openwrt@daniel.thecshore.com>
Signed-off-by: Petr Å tetiar <ynezz@true.cz>

SVN-Revision: 48661
---
 package/base-files/files/etc/init.d/sysfixtime | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/package/base-files/files/etc/init.d/sysfixtime b/package/base-files/files/etc/init.d/sysfixtime
index 4010e06f93..ab946f6518 100755
--- a/package/base-files/files/etc/init.d/sysfixtime
+++ b/package/base-files/files/etc/init.d/sysfixtime
@@ -2,10 +2,24 @@
 # Copyright (C) 2013-2014 OpenWrt.org
 
 START=00
+STOP=90
+
+RTC_DEV=/dev/rtc0
+HWCLOCK=/sbin/hwclock
 
 boot() {
+	start && exit 0
+
 	local curtime="$(date +%s)"
 	local maxtime="$(find /etc -type f -exec date -r {} +%s \; | sort -nr | head -n1)"
 	[ $curtime -lt $maxtime ] && date -s @$maxtime
 }
 
+start() {
+	[ -e "$RTC_DEV" ] && [ -e "$HWCLOCK" ] && $HWCLOCK -s -f $RTC_DEV
+}
+
+stop() {
+	[ -e "$RTC_DEV" ] && [ -e "$HWCLOCK" ] && $HWCLOCK -w -f $RTC_DEV && \
+		logger -t sysfixtime "saved '$(date)' to $RTC_DEV"
+}
-- 
2.30.2