doc: describe clock / NTP config

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
chargebyte · Apr 24, 2017 · 25c3c22 · 25c3c22
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diff --git a/doc/evachargese/clock.rst b/doc/evachargese/clock.rst
@@ -0,0 +1,25 @@
+Clock
+=====
+
+After a cold boot the real-time clock (RTC) of the i.MX28 lose its setting and needs to be reinitialized with current time.
+
+New EVAcharge SE factory images (r07 and later) already contains a NTP daemon which could fetch the current time from the internet. But this requires a working network configuration with a gateway and at least 1 DNS server. So please follow the `Debian network documentation`_.
+
+.. _Debian network documentation: https://wiki.debian.org/NetworkConfiguration
+
+As per default the NTP daemon is preconfigured for the following servers:
+
+- 0.debian.pool.ntp.org
+- 1.debian.pool.ntp.org
+- 2.debian.pool.ntp.org
+- 3.debian.pool.ntp.org
+
+The NTP configuration itself is located in this file::
+
+  /etc/ntp.conf
+
+Please refer to the `Debian NTP documentation`_ and `NTP pool project`_ for more information.
+
+.. _Debian NTP documentation: https://wiki.debian.org/NTP
+.. _NTP pool project: http://www.pool.ntp.org/
+
diff --git a/doc/evachargese/index.rst b/doc/evachargese/index.rst
@@ -19,6 +19,7 @@ EVAcharge SE
    general
    login
    leds
+   clock
    can
    gpio
    usb