One barebox image for multiple boards

[Sascha Hauer]

On Fri, May 13, 2022 at 02:08:06PM +0200, Matthias Fend wrote:
> Hello Sam,
> 
> Am 13.05.2022 um 12:30 schrieb Sam Ravnborg:
> > Hi Matthias
> > 
> > On Fri, May 13, 2022 at 10:55:02AM +0200, Matthias Fend wrote:
> > > Hi,
> > > 
> > > I'm looking for a solution to support multiple boards with just one barebox
> > > image. The few core components that are relevant for barebox are the same on
> > > all boards, so that the same barebox image runs on all boards. It is
> > > possible to dynamically detect the board type inside barebox, but as this
> > > requires some infrastructure it is not possible during lowlevel init.
> > 
> > The skov-imx6 boards was in a similar situation - here the solution was
> > to add enough infrastructure to lowlevel to be able to determine the
> > board variant.
> > 
> > Not what you asked for but maybe duplicating the minimal set of
> > infrastructure allows you to determine the board type anyway in lowlevel?
> 
> Thank you for pointing out this interesting example.
> Since in this case things like I2C devices are needed for board detection, I
> think putting them in lowlevel init is not a good idea.

It wouldn't be the first board doing I2C in lowlevel init, see
drivers/i2c/busses/i2c-imx-early.c.

Sascha


-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |