On Fri, Mar 15, 2019 at 5:02 PM Maxime Ripard <maxime.rip...@bootlin.com> wrote:
>
> On Fri, Mar 15, 2019 at 10:39:24AM +0800, Chen-Yu Tsai wrote:
> > On Fri, Mar 15, 2019 at 4:16 AM Maxime Ripard <maxime.rip...@bootlin.com>
> > wrote:
> > >
> > > The soc node in the A80 DTSI has a ranges property, but no matching unit
> > > address, which results in a DTC warning. Add the unit address to remove
> > > that warning.
> > >
> > > Signed-off-by: Maxime Ripard <maxime.rip...@bootlin.com>
> > > ---
> > > arch/arm/boot/dts/sun9i-a80.dtsi | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/arch/arm/boot/dts/sun9i-a80.dtsi
> > > b/arch/arm/boot/dts/sun9i-a80.dtsi
> > > index 9b15f272e5f5..7a495c84ab65 100644
> > > --- a/arch/arm/boot/dts/sun9i-a80.dtsi
> > > +++ b/arch/arm/boot/dts/sun9i-a80.dtsi
> > > @@ -289,7 +289,7 @@
> > > status = "disabled";
> > > };
> > >
> > > - soc {
> > > + soc@20000 {
> >
> > I thought we didn't like the soc node having an address?
>
> In general, yes, but in general we also don't have a ranges property.
>
> > Maybe we just bite the bullet and use 64-bit addresses and sizes for
> > the A80?
>
> I'd rather not, the current layout of the DT is pretty nice.
>
> But now I'm thinking, do you remember why we need to do that mapping
> in the first place? It's a 32bits SoCs, so why do we need to care
> about 64 bits addresses?
It supports LPAE, addressing up to 8GB of RAM. Not that I've seen a
board sporting that much RAM though. Theobroma Systems might have
had such a board though, as their product page says "up to 8GB RAM".
ChenYu
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