On Mon, Nov 18, 2024 at 10:50:25AM +0000, Daniel Machon wrote:
> Hi Conor,
>
> > > The lan969x switch device supports two RGMII port interfaces that can be
> > > configured for MAC level rx and tx delays.
> > >
> > > Document two new properties {rx,tx}-internal-delay-ps. Make them
> > > required properties, if the phy-mode is one of: rgmii, rgmii_id,
> > > rgmii-rxid or rgmii-txid. Also specify accepted values.
> > >
> > > Signed-off-by: Daniel Machon <daniel.machon@xxxxxxxxxxxxx>
> > > ---
> > > .../bindings/net/microchip,sparx5-switch.yaml | 20 ++++++++++++++++++++
> > > 1 file changed, 20 insertions(+)
> > >
> > > diff --git a/Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml b/Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml
> > > index dedfad526666..a3f2b70c5c77 100644
> > > --- a/Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml
> > > +++ b/Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml
> > > @@ -129,6 +129,26 @@ properties:
> > > minimum: 0
> > > maximum: 383
> > >
> > > + allOf:
> > > + - if:
> > > + properties:
> > > + phy-mode:
> > > + contains:
> > > + enum:
> > > + - rgmii
> > > + - rgmii-rxid
> > > + - rgmii-txid
> > > + - rgmii-id
> > > + then:
> > > + properties:
> > > + rx-internal-delay-ps:
> > > + enum: [0, 1000, 1700, 2000, 2500, 3000, 3300]
> > > + tx-internal-delay-ps:
> > > + enum: [0, 1000, 1700, 2000, 2500, 3000, 3300]
> >
> > Properties should be define at the top level and constrained in the
> > if/then parts. Please move the property definitions out, and just leave
> > the required: bit here.
> >
> > > + required:
> > > + - rx-internal-delay-ps
> > > + - tx-internal-delay-ps
> >
> > You've got no else, so these properties are valid even for !rgmii?
> >
> > > +
> > > required:
> > > - reg
> > > - phys
> >
> > Additionally, please move the conditional bits below the required
> > property list.
> >
> > Cheers,
> > Conor.
>
> I will be getting rid of the 'required' constraints in v3. What I hear
> you say, is that the two {rx,tx}-internal-delay-ps properties (incl.
> their enum values) should be moved out of the if/else and to the
> top-level - can you confirm this?
> Is specifying the values
> a property can take not considered a constraint?
Actually, in this case the property isn't even defined (per
ethernet-controller.yaml) if the phy-mode wasn't an rgmii one, so what
you had here was probably fine. Ordinarily, that's not the case, so you'd
have been setting constraints for only rgmii phy-modes and no
constraints at all for non-rgmii phy-modes.
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