linux-kernel - Re: [net-next PATCH 06/13] Documentation: devicetree: net: dsa: qca8k: document rgmii_1

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Message-ID: <YV46wJYlJZHAZLyD@lunn.ch>
Date:   Thu, 7 Oct 2021 02:09:36 +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 06/13] Documentation: devicetree: net: dsa:
 qca8k: document rgmii_1_8v bindings

On Thu, Oct 07, 2021 at 12:35:56AM +0200, Ansuel Smith wrote:
> Document new qca,rgmii0_1_8v and qca,rgmii56_1_8v needed to setup
> mac_pwr_sel register for ar8327 switch.
> 
> Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> ---
>  Documentation/devicetree/bindings/net/dsa/qca8k.txt | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/qca8k.txt b/Documentation/devicetree/bindings/net/dsa/qca8k.txt
> index 8c73f67c43ca..1f6b7d2f609e 100644
> --- a/Documentation/devicetree/bindings/net/dsa/qca8k.txt
> +++ b/Documentation/devicetree/bindings/net/dsa/qca8k.txt
> @@ -13,6 +13,8 @@ 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
> +- qca,rgmii56-1-8v: Set the internal regulator to supply 1.8v for MAC5/6 port

What is the consumer of these 1.8v? The MACs are normally internal,
the regulators are internal, so why is a DT property needed?

    Andrew