Re: [PATCH v4 1/8] arm64: dts: rockchip: Clean up /memory nodes

Heiko Stuebner
2016-04-12T05:25:10Z

Am Donnerstag, 31. März 2016, 22:45:52 schrieb Heiko Stuebner:
> Am Donnerstag, 31. März 2016, 19:15:43 schrieb Heiko Stuebner:
> > Am Samstag, 19. März 2016, 09:04:08 schrieb Heiko Stuebner:
> > > Am Mittwoch, 16. März 2016, 14:58:39 schrieb Andreas Färber:
> > > > A dtc update results in warnings for nodes with reg property but
> > > > without
> > > > unit address in the node name, so rename /memory to /memory@0.
> > > >
> > > > Signed-off-by: Andreas Färber <afaerber@suse.de>
> > >
> > > applied to a dts64-fixes branch for 4.6, after changing the commit
> > > message to ----
> > > A dtc update results in warnings for nodes with reg property but
> > > without
> > > unit address in the node name, so rename /memory to
> > > /memory@startaddress
> > > (memory starts at 0 in the case of the rk3368).
> > > ----
> > >
> > > To clarify that the @0 is not arbitary chosen.
> >
> > This dtc update in question hasn't landed in v4.6-rc1 and from what I
> > gathered will need some changes. The patch is obviously still correct,
> > but I have now moved it from v4.6-fixes to the regular v4.7 64bit dts
> > changes.
>
> also it seems "memory" is special and memory without unitname will stay
> allowed [0], especially as uboot or other bootloaders may expect such a
> node to insert the actual amount of memory into it.
>
> Looking at uboot, fdt_fixup_memory_banks seems to look explicitly for a
> "memory" node, so I'm actually not sure, if this is safe to keep at all.

so after pondering this some more, I decided to drop this change again.
/memory will stay allowed and might produce less issues with bootloaders
touching the memory values.

> [0] http://www.spinics.net/lists/arm-kernel/msg494038.html