[Gta04-owner] Find out if you have a 800 MHz or 1 GHz DM3730 in your GTA04

Dr. H. Nikolaus Schaller hns at goldelico.com
Mon Sep 10 14:01:45 CEST 2012

We had produced some GTA04 with a DM3730CBP100 chip variant (to find out
if the production problems could depend on different chip suppliers) which is
specified for 1 GHz clock (note that it is possible to overclock all variants...).

To make it easier to find out which chip variant is built into a given device,
we have added a tiny patch to U-Boot that reads out the config register
and sets the "mpurate" kernel command line argument to "800" or "1000".

The hw-tester script of the Debian/LXDE can then simply parse /proc/cmdline
to find out and report the max. official clock rate.

Here are the patches:


-- hns

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