[U-Boot] so u-boot can be configured to try to update itself on every boot?

[Robert P. J. Day]

On Wed, 29 Mar 2017, Wolfgang Denk wrote:

> Dear Robert,
>
> In message <alpine.LFD.2.20.1703290927110.21547 at uk63952.mitel.com> you wrote:
> >
> >   kind of a trivial question but i was just perusing the code related
> > to FIT images and ran across this in main.c:
> ...
> >   #if defined(CONFIG_UPDATE_TFTP)
> >         update_tftp(0UL, NULL, NULL);        <----- THERE
> >   #endif /* CONFIG_UPDATE_TFTP */
> >   ... snip ...
> >
> > i'm assuming that, given the proper configuration, u-boot will try
> > to update its own binary on every single boot, yes? not sure why i
> > never noticed that before.
>
> This is documented in the "README" and especially in the
> "doc/README.update" files.  It also describes how one would normally
> use the "updatefile" environment variable to enable / disable this
> feature.  But yes, if you keep this vaiable around, this will repeat
> on every boot, according to good old UNIX philosophy:
>
> "UNIX was not designed to stop you from doing stupid things,  because
> that would also stop you from doing clever things."       - Doug Gwyn

  yup, i eventually found that README.update file, this behaviour is
just fine for what i'm doing, thanks.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

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