[U-Boot] Question about baud rate
Detlev Zundel
dzu at denx.de
Thu Nov 17 18:50:04 CET 2011
Hi Dan,
> I'm using a board similar to canyonlands with a ppc460ex. The baud rate
> for ttyS0 is set to 115200 by the console= bootarg, but I'd also like to
> set ttyS1-3 to 115200 also.
Why doe you want to setup this parameters "from the outside"? Really
only the serial device used for a console needs to be setup by
firmware. All other serial devices should be initialized by the user
space programs using them.
> For each of the three uarts, the device tree has the following line:
>
> current-speed = <0>; /* Filled in by U-Boot */
Checking current U-Boot code, I believe this comment is simply wrong. I
cannot see any part in the canyonlands / or generic 4xx infrastructure
that fixes up these properties. Maybe Stefan can comment on this
though.
> How do I go about configuring u-boot to fill these with the baud rate I
> choose?
>
> Sorry for the silly question!
I don;t think its a silly question, but I also think that you do not
need the configuration ;)
Cheers
Detlev
--
One of the main causes of the fall of the Roman Empire was that, lacking zero,
they had no way to indicate successful termination of their C programs.
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