netdev - Re: [PATCH net-next v3 v3 1/2] dt-bindings: net: xilinx

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Date:   Thu, 25 Mar 2021 07:54:21 -0600
From:   Rob Herring <robh@...nel.org>
To:     Robert Hancock <robert.hancock@...ian.com>
Cc:     "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "radhey.shyam.pandey@...inx.com" <radhey.shyam.pandey@...inx.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH net-next v3 v3 1/2] dt-bindings: net: xilinx_axienet:
 Document additional clocks

On Wed, Mar 24, 2021 at 11:19 AM Robert Hancock
<robert.hancock@...ian.com> wrote:
>
> On Wed, 2021-03-24 at 11:08 -0600, Rob Herring wrote:
> > On Fri, Mar 12, 2021 at 01:52:13PM -0600, Robert Hancock wrote:
> > > Update DT bindings to describe all of the clocks that the axienet
> > > driver will now be able to make use of.
> > >
> > > Signed-off-by: Robert Hancock <robert.hancock@...ian.com>
> > > ---
> > >  .../bindings/net/xilinx_axienet.txt           | 25 ++++++++++++++-----
> > >  1 file changed, 19 insertions(+), 6 deletions(-)
> > >
> > > diff --git a/Documentation/devicetree/bindings/net/xilinx_axienet.txt
> > > b/Documentation/devicetree/bindings/net/xilinx_axienet.txt
> > > index 2cd452419ed0..b8e4894bc634 100644
> > > --- a/Documentation/devicetree/bindings/net/xilinx_axienet.txt
> > > +++ b/Documentation/devicetree/bindings/net/xilinx_axienet.txt
> > > @@ -42,11 +42,23 @@ Optional properties:
> > >               support both 1000BaseX and SGMII modes. If set, the phy-mode
> > >               should be set to match the mode selected on core reset (i.e.
> > >               by the basex_or_sgmii core input line).
> > > -- clocks   : AXI bus clock for the device. Refer to common clock bindings.
> > > -             Used to calculate MDIO clock divisor. If not specified, it is
> > > -             auto-detected from the CPU clock (but only on platforms where
> > > -             this is possible). New device trees should specify this - the
> > > -             auto detection is only for backward compatibility.
> > > +- clock-names:       Tuple listing input clock names. Possible clocks:
> > > +             s_axi_lite_clk: Clock for AXI register slave interface
> > > +             axis_clk: AXI4-Stream clock for TXD RXD TXC and RXS
> > > interfaces
> > > +             ref_clk: Ethernet reference clock, used by signal delay
> > > +                      primitives and transceivers
> > > +             mgt_clk: MGT reference clock (used by optional internal
> > > +                      PCS/PMA PHY)
> >
> > '_clk' is redundant.
>
> True, but there are existing device trees which already referenced these names
> because those are what was used by the Xilinx version of this driver and hence
> the Xilinx device tree generation software. So for compatibility I think we are
> kind of stuck with those names..

upstream? If not, then it doesn't matter what downstream is doing.
However, this isn't that important, so it's fine.

Acked-by: Rob Herring <robh@...nel.org>