On Tue, Sep 06, 2016 at 06:20:48PM +0800, Jisheng Zhang wrote:
> Hi Mark,
>
> On Tue, 6 Sep 2016 11:22:08 +0100 Mark Rutland wrote:
>
> > On Tue, Sep 06, 2016 at 04:55:55PM +0800, Jisheng Zhang wrote:
> > > This patch fixes the following DTC warning with W=1:
> > >
> > > "Node /soc has a reg or ranges property, but no unit name"
> > >
> > > Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxxx>
> >
> > The node is only compatible with simple-bus, and so shouldn't have a
> > reg.
>
> IIUC, the warning is caused by "ranges = <0 0 0xf7000000 0x1000000>;"
Hmm.. I've rather confused by that warning. Per ePAPR and the
devicetree.org spec, the unit-addresss is meant to match the reg
property, and no mention is made of the ranges property. So I do not
think that it is necessary to require this.
That warning seems to have gone into DTC in commit c9d9121683b35281
("Warn on node name unit-address presence/absence mismatch").
Rob, Stephen, was there some discussion that prompted ranges requiring
a matching unit-address?
Thanks,
Mark.
> > Why not remove the reg?
> >
> > Mark
> >
> > > ---
> > > arch/arm64/boot/dts/marvell/berlin4ct.dtsi | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> > > index 099ad93..2d6f91f 100644
> > > --- a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> > > +++ b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> > > @@ -134,7 +134,7 @@
> > > <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
> > > };
> > >
> > > - soc {
> > > + soc@f7000000 {
> > > compatible = "simple-bus";
> > > #address-cells = <1>;
> > > #size-cells = <1>;
> > > --
> > > 2.9.3
> > >
>
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