linux-kernel - Re: [PATCH 13/15] net: phy: mdio: add support for PHY supply regulator

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Date:   Tue, 23 Jun 2020 11:30:19 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Iyappan Subramanian <iyappan@...amperecomputing.com>,
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        Frank Rowand <frowand.list@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        netdev <netdev@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
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        "moderated list:ARM/Mediatek SoC..." 
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        Fabien Parent <fparent@...libre.com>,
        Stephane Le Provost <stephane.leprovost@...iatek.com>,
        Pedro Tsai <pedro.tsai@...iatek.com>,
        Andrew Perepech <andrew.perepech@...iatek.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH 13/15] net: phy: mdio: add support for PHY supply regulator

pon., 22 cze 2020 o 15:25 Russell King - ARM Linux admin
<linux@...linux.org.uk> napisał(a):
>
> On Mon, Jun 22, 2020 at 11:37:42AM +0200, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> >
> > Currently many MAC drivers control the regulator supplying the PHY but
> > this is conceptually wrong. The regulator should be defined as a property
> > of the PHY node on the MDIO bus and controlled by the MDIO sub-system.
> >
> > Add support for an optional PHY regulator which will be enabled before
> > optional deasserting of the reset signal.
>
> I wonder if this is the right place for this - MDIO devices do not have
> to be PHYs - they can be switches, and using "phy-supply" for a switch
> doesn't seem logical.
>
> However, I can see the utility of having having a supply provided for
> all mdio devices, so it seems to me to be a naming issue.  Andrew?
>

I followed the example of the phy reset retrieved in
mdiobus_register_reset(). I'm happy to change it to some other name.

Bart