[U-Boot] arm mach-types.h

Michael Walle
2011-11-13T17:52:09Z

Am Sonntag 13 November 2011, 18:14:16 schrieb Marek Vasut:
> > Am Sonntag 13 November 2011, 17:18:27 schrieb Marek Vasut:
> > > > Am Sonntag 13 November 2011, 01:32:03 schrieb Marek Vasut:
> > > > > > - every supported board in u-boot has to be supported in
> > > > > > mainline linux,
> > > > > >
> > > > > > too. because that is the basic requirement for an entry to
> > > > > > stay in this file.
> > > > >
> > > > > No, you can define CONFIG_MACH_TYPE MACH_TYPE_SOMETHING and
> > > > > MACH_TYPE_SOMETHING nnn in your config file.
> > > >
> > > > well, according to this argumentation, there would be no need for
> > > > mach-types.h at all. because if you rely on a mach-types.h definition
> > > > and it is removed from linux, you have to switch to define it
> > > > yourself anyway.
> > >
> > > Not really, if you don't use it to boot linux, you don't need the mach
> > > id. Or if you use dtree.
> >
> > so why should i use the mach-type.h anyway? instead i could just define
> > the id in the config.
> >
> > either there is a database, where the ids come from (and this database
> > must not follow the linux policies) or there is no database and every
> > board defines the numerical id (of couse they must match the linux mach
> > ids.)
> >
> > what about boards which switch from mach-ids to DT in linux? Just don't
> > support mach-ids for these anymore and not being able to boot older
> > kernels?
>
> Why would the machine ID be removed from mach-types.h is the machine
> switched to DT ?
linux policy