[U-Boot] Can I load uEnv.txt conditionally, based on the boot source?

Brian Smucker
2015-02-11T17:14:19Z

Hello,

That would be the most obvious thing, wouldn't it. I thought of that,
but am not sure of the answer in u-boot.

Thanks,
Brian

On 2/11/2015 12:09 AM, Joe Hershberger wrote:
>
> On Tue, Feb 10, 2015 at 7:18 PM, Brian Smucker <bds@bsmucker.eu.org
> <mailto:bds@bsmucker.eu.org>> wrote:
> >
> > Hello,
> >
> > I was wondering if there is a way to tell what the boot source is?
> >
> > My am335x SOC can boot to the mmc or the flash, based on the status
> of a digital line. I would like to load the uEnv.txt, only if booting
> from SD card (mmc). I notice at least in some codebases that the
> automatic loading of uEnv.txt is based on whether the SD card is
> available, not whether we are currently booting from the SD card.
> >
> > Is there a way to sense which we are booting from?
>
> Are you able to read the same digital line that the SoC is using to
> decide?