linux-kernel - Re: [net-next PATCH v2 06/15] dt-bindings: net: dsa: qca8k: document rgmii_1

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Date:   Sat, 9 Oct 2021 17:30:14 +0200
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH v2 06/15] dt-bindings: net: dsa: qca8k: document
 rgmii_1_8v bindings

On Sat, Oct 09, 2021 at 05:18:55PM +0200, Andrew Lunn wrote:
> On Fri, Oct 08, 2021 at 02:22:16AM +0200, Ansuel Smith wrote:
> > Document new qca,rgmii0_1_8v and qca,rgmii56_1_8v needed to setup
> > mac_pwr_sel register for qca8337 switch. Specific the use of this binding
> > that is used only in qca8337 and not in qca8327.
> > 
> > Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> > ---
> >  Documentation/devicetree/bindings/net/dsa/qca8k.txt | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/dsa/qca8k.txt b/Documentation/devicetree/bindings/net/dsa/qca8k.txt
> > index 8c73f67c43ca..9383d6bf2426 100644
> > --- a/Documentation/devicetree/bindings/net/dsa/qca8k.txt
> > +++ b/Documentation/devicetree/bindings/net/dsa/qca8k.txt
> > @@ -13,6 +13,14 @@ Required properties:
> >  Optional properties:
> >  
> >  - reset-gpios: GPIO to be used to reset the whole device
> > +- qca,rgmii0-1-8v: Set the internal regulator to supply 1.8v for MAC0 port.
> > +                   This is needed for qca8337 and toggles the supply voltage
> > +                   from 1.5v to 1.8v. For the specific regs it was observed
> > +                   that this is needed only for ipq8064 and ipq8065 target.
> > +- qca,rgmii56-1-8v: Set the internal regulator to supply 1.8v for MAC5/6 port.
> > +                    This is needed for qca8337 and toggles the supply voltage
> > +                    from 1.5v to 1.8v. For the specific regs it was observed
> > +                    that this is needed only for ipq8065 target.
> 
> Are ipq8065 & ipq8064 SoCs which the switch is embedded into? So you
> could look for the top level compatible and set these regulators based
> on that. No DT property needed.
> 
>    Andrew

The switch is still external for these 2 SoC. If we really want, yes we
can follow that route and sets only for the 2 SoC. (Considering ipq8065
is still not present, can I add it anyway in the qca8k code? Will for
sure propose the ipq8065 dtsi today)

-- 
	Ansuel