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<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'>Hi,</span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'> </span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'>I am trying to use internal Real Time Clock of my ads5121
board .So that I am using /dev/rtc-0 device with linux/Documentation/rtc.txt example.
I can read and write time/date but I notice RTC is not being updated as if VBAT
was off or there was not oscillator (I tested oscillator and VBAT).</span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'> </span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'>According MPC5121e errdata of freescale doc., there’s
an issue involving RTC:</span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'> </span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'>Description:</span></font></p>
<p class=MsoNormal style='text-autospace:none'><b><i><font size=3 face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;font-weight:bold;font-style:italic'>“</span></font></i></b><i><font
face=Verdana><span style='font-family:Verdana;font-style:italic'>The TAMP bit
in the SRTC does not reliably provide an indication that the RTC power supply
or the RTC</span></font></i></p>
<p class=MsoNormal style='text-autospace:none'><i><font size=3 face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;font-style:italic'>oscillator has
been interrupted”</span></font></i></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 face=Verdana><span
style='font-size:12.0pt;font-family:Verdana'> </span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 face=Verdana><span
style='font-size:12.0pt;font-family:Verdana'>Workaround:</span></font></p>
<p class=MsoNormal style='text-autospace:none'><i><font size=3 face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;font-style:italic'>“In your
system’s design, do not rely on the tamper indication to be reliable”</span></font></i></p>
<p class=MsoNormal style='text-autospace:none'><i><font size=3 face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;font-style:italic'> </span></font></i></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'> </span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'>Looking in rtc-mpc5121.c code I didn’t find anything
related to Keep Alive Register (where TAMP bit is) so I would like to know where
this issue is taking into account or if it is really being taking into account in
the driver.</span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'> </span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'> </span></font></p>
<p class=MsoNormal><font size=3 face=Verdana><span style='font-size:12.0pt;
font-family:Verdana'>Regards, Moisés.</span></font></p>
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