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 17:18:55 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Ansuel Smith <ansuelsmth@...il.com>
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 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