Re: [PATCH V2] d-i hd-media support for armhf
On Sat, Nov 01, 2014 at 12:06:55AM -0700, Vagrant Cascadian wrote:
[d-i hd-media support for armhf, boot script]
> Overall, it appears to be working quite well. I've thought about
> creating a similar bootscript for the netboot images.
>
> > +if test -n "${console}"; then
> > + setenv bootargs "${bootargs} console=${console}"
> > +fi
>
> It would seem that the console variable isn't consistant across u-boot
> platforms. On some (sunxi) it sets both the device and the baudrate
> (i.e. console=ttyS0,115200), but on many other platforms console only
> sets the device (i.e. console=ttyS0) and linux then reverts to 9600
> baud. But the u-boot baudrate is often 115200 with u-boot itself, and
> set in a baudrate variable. It doesn't seem possible to set a sane
> default...
>
> So basically this "generic" boot script only works with platforms where
> the baudrate is included in the "console" variable (or where the
> baudrate defaults to 9600, to match linux's default, though I think most
> of the armhf platforms at least default to 115200). *sigh*
>
> Not sure if u-boot's shell has the ability to match contents of
> variables, so the baudrate could be conditionally added only if not
> already present.
AFAICS there is no such functionality in u-boot's commandline
parser. Ian, do you perhaps have an idea how to implement this
in a u-boot script? Unfortunately the existence of a ${baudrate}
variable is independent from whether ${console} has the baudrate
encoded into it or not, so just checking for the existence of
${baudrate} does not help in this case.
Regards,
Karsten
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