[PATCH] fix-pm-gsm-disable-serial-drive-when-off.patch

Dieter Spaar spaar at openmoko.org
Sun Feb 22 19:49:38 CET 2009

Hello Mike,

Mike (mwester) wrote:
> Is there something we can trigger on to know that the calypso has
> booted?  Can we look for a change in the serial port control lines?

I won't rely on the port control lines because they are not totally under
control  of the GSM firmware while booting (there is also the FLUID
ROM  bootloader). When the GSM firmware is up, it sends "AT-
Command Interpreter ready" to the serial port. If CTS is high, the
GSM firmware should set GPIO 1 to high when it tries to send this
initial message. Maybe this can be used ?

Best regards,

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