Re: [PATCH net-next 1/2] dt-bindings: net: pcs: renesas,rzn1-miic: Add renesas,miic-phylink-active-low property

["Lad, Prabhakar" <prabhakar.csengg@gmail.com>]

Hi Russell,

On Thu, Nov 13, 2025 at 7:05 PM Lad, Prabhakar
<prabhakar.csengg@gmail.com> wrote:
>
> Hi Russell,
>
> On Thu, Nov 13, 2025 at 3:58 PM Russell King (Oracle)
> <linux@armlinux.org.uk> wrote:
> >
> > On Thu, Nov 13, 2025 at 02:45:18PM +0000, Lad, Prabhakar wrote:
> > > Hi Wolfram,
> > >
> > > On Wed, Nov 12, 2025 at 8:40 PM Wolfram Sang
> > > <wsa+renesas@sang-engineering.com> wrote:
> > > >
> > > > Hi Prabhakar,
> > > >
> > > > > Add the boolean DT property `renesas,miic-phylink-active-low` to the RZN1
> > > >
> > > > Hmm, we already have "renesas,ether-link-active-low" in
> > > > renesas,ether.yaml and renesas,etheravb.yaml. Can't we reuse that?
> > > >
> > > On the RZ/N1x we have the below architecture
> > >
> > >                                                       +----> Ethernet Switch
> > >                                                       |           |
> > >                                                       |           v
> > >     MII Converter ----------------------+      GMAC (Synopsys IP)
> > >                                                       |
> > >                                                       +----> EtherCAT
> > > Slave Controller
> > >                                                       |
> > >                                                       +----> SERCOS
> > > Controller
> >
> > I'm not sure that diagram has come out correctly. If you're going to
> > draw diagrams, make sure you do it using a fixed-width font. To me,
> > it looks like the MII Converter is bolted to GMAC and only has one
> > connection, and the GMAC has what seems to be maybe five connections.
> >
> Sorry when typing the diagram the mail client showed the diagram OK
> but when sent everything was messed up. Ive represented now in a
> different way.
>
>                                     +-----------------------+
>                                     |   MII Converter     |
>                                     +-----------+-----------+
>                                                     |
>            +-----------------------------------------+-------------------------------------------+
>             |                                                  |
>                                                |
>             v                                                 v
>                                              v
>  +---------------------+
> +---------------------------+
> +------------------------------+
>  | Ethernet Switch  |                   |  EtherCAT Slave      |
>             |  SERCOS Controller   |
>  +---------+------------+                  |  Controller
> |                   +------------------------------+
>                |                                  +---------------------------+
>                |
>                v
>   +-------------------------+
>  |  GMAC (Synopsys  |
>  |       IP)                     |
>  +--------------------------+
>
Looks like this was messed up too, Ive pasted the diagram here now
https://gist.github.com/prabhakarlad/9549df941eaced5b06efc572ff6c82b5

Sorry for the noise.

Cheers,
Prabhakar