Hi Rob,
On Fri, 2021-02-05 at 16:35 -0600, Rob Herring wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you
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>
> On Wed, Jan 20, 2021 at 09:19:21AM +0100, Steen Hegelund wrote:
> > This provides reset driver support for the Microchip Sparx5 PCB134
> > and
> > PCB135 reference boards.
>
> This isn't a compatible change. You need an explanation why that's
> okay
> if that's intended.
I am not entirely sure that I get your point.
The change (adding the reset driver) is new, and it is optional (but
strongly recommended) for the clients to use it, so will this be a
incompatible change?
I can certainly add a an explanation. Would that be needed here in the
bindings, or where do you suggest?
>
> >
> > Signed-off-by: Steen Hegelund <steen.hegelund@xxxxxxxxxxxxx>
> > ---
> > arch/arm64/boot/dts/microchip/sparx5.dtsi | 14 +++++++++++---
> > 1 file changed, 11 insertions(+), 3 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/microchip/sparx5.dtsi
> > b/arch/arm64/boot/dts/microchip/sparx5.dtsi
> > index 380281f312d8..4edbb9fcdce0 100644
> > --- a/arch/arm64/boot/dts/microchip/sparx5.dtsi
> > +++ b/arch/arm64/boot/dts/microchip/sparx5.dtsi
> > @@ -132,9 +132,17 @@ mux: mux-controller {
> > };
> > };
> >
> > - reset@611010008 {
> > - compatible = "microchip,sparx5-chip-reset";
> > - reg = <0x6 0x11010008 0x4>;
> > + gcb_ctrl: syscon@611010000 {
> > + compatible = "microchip,sparx5-gcb-syscon",
> > "syscon";
> > + reg = <0x6 0x11010000 0x10000>;
> > + };
> > +
> > + reset: reset-controller@0 {
> > + compatible = "microchip,sparx5-switch-reset";
> > + reg = <0x6 0x0 0x0>;
>
> Your register length is 0?
>
> > + #reset-cells = <1>;
> > + cpu-syscon = <&cpu_ctrl>;
>
> Can't you accomplish the same thing adding these to
> "microchip,sparx5-chip-reset"? Or possibly as a child node.
>
> Define nodes based on h/w blocks, not as containers of things you
> happen
> to want for some driver.
>
> > + gcb-syscon = <&gcb_ctrl>;
> > };
> >
> > uart0: serial@600100000 {
> > --
> > 2.29.2
> >
Thanks for your comments
BR
Steen
