Hi,
Le vendredi 16 novembre 2018 à 17:47 +0800, Chen-Yu Tsai a écrit :
> On Fri, Nov 16, 2018 at 5:39 PM Maxime Ripard <maxime.ripard@xxxxxxxxxxx> wrote:
> > On Thu, Nov 15, 2018 at 03:50:06PM +0100, Paul Kocialkowski wrote:
> > > Now that we have specific nodes for the H3 and H5 system-controller
> > > that allow proper access to the EMAC clock configuration register,
> > > we no longer need a common dummy syscon node.
> > >
> > > Switch the syscon label over to each platform's dtsi file.
> > >
> > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> > > ---
> > > arch/arm/boot/dts/sun8i-h3.dtsi | 2 +-
> > > arch/arm/boot/dts/sunxi-h3-h5.dtsi | 6 ------
> > > arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi | 2 +-
> > > 3 files changed, 2 insertions(+), 8 deletions(-)
> > >
> > > diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> > > index 7157d954fb8c..b337a9282783 100644
> > > --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> > > +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> > > @@ -134,7 +134,7 @@
> > > };
> > >
> > > soc {
> > > - system-control@1c00000 {
> > > + syscon: system-control@1c00000 {
> > > compatible = "allwinner,sun8i-h3-system-control";
> > > reg = <0x01c00000 0x1000>;
> > > #address-cells = <1>;
> > > diff --git a/arch/arm/boot/dts/sunxi-h3-h5.dtsi b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
> > > index 4b1530ebe427..9175ff0fb59a 100644
> > > --- a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
> > > +++ b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
> > > @@ -152,12 +152,6 @@
> > > };
> > > };
> > >
> > > - syscon: syscon@1c00000 {
> > > - compatible = "allwinner,sun8i-h3-system-controller",
> > > - "syscon";
> > > - reg = <0x01c00000 0x1000>;
> > > - };
> > > -
> >
> > You're also dropping the syscon compatible there. But I'm not sure how
> > it could work with the H3 EMAC driver that would overwrite the
> > compatible already.
>
> I assume you are referring to the previous patch? The node names are not
> the same, hence the previous patch is adding another node for the system
> controller, and this patch removes the old one with the "syscon" compatible.
>
> We already patched the EMAC driver to support the new SRAM controller based
> regmap, so other than making people unhappy about having to update their
> DT, I don't think there would be any problems. This also means H3 in -next
> currently has _two_ syscon nodes.
Yes, the point is indeed to only have a single node per platform (in
the platform dtsi) instead of two (one in the common h3-h5 dtsi and one
in the platform dtsi).
I guess updating the dt is not even a hard requirement after this
series: things will keep working with the dummy syscon node for giving
the EMAC driver access to the syscon registers.
Cheers,
Paul
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