Cesar Eduardo Barros cesarb at cesarb.net
Wed Aug 27 13:31:06 CEST 2008

In a message from Ben Dooks on linux-arm-kernel about cpufreq, he said:

 > > - My patches have code to use hardware flow control to "pause" the
 > > serial ports during frequency transitions, so as to not confuse the
 > > GTA01 GSM modem (or Openmoko's gsmd).
 > That is useful for designs that forgot to provide a stable UCLK to
 > provide UART baud clocks... all of the ones that I've had a direct
 > hand in working on feed back or feed in an external known (and stable)
 > clock.

It might be worth considering this on future designs (looking at the 
schematics, GTA01 uses the pin for something else, while GTA02 doesn't 
connect the pin at all).

Cesar Eduardo Barros
cesarb at cesarb.net
cesar.barros at gmail.com

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