netdev - Re: [PATCH net-next v1 4/7] net: pse-pd: add generic PSE driver

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Date:   Sat, 20 Aug 2022 14:10:04 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Corbet <corbet@....net>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
        David Jander <david@...tonic.nl>
Subject: Re: [PATCH net-next v1 4/7] net: pse-pd: add generic PSE driver

On Fri, Aug 19, 2022 at 11:32:00PM +0200, Andrew Lunn wrote:
> On Fri, Aug 19, 2022 at 02:01:06PM +0200, Oleksij Rempel wrote:
> > Add generic driver to support simple Power Sourcing Equipment without
> > automatic classification support.
> > 
> > This driver was tested on 10Bast-T1L switch with regulator based PoDL PSE.
> 
> Do you have access to a PHY which implements clause 45.2.9? That seems
> like a better reference implementation?

Suddenly I do not have access to any of them. 

> I don't know the market, what is more likely, a simple regulator, or
> something more capable with an interface like 45.2.9?

So far I was not able to find any PoDL PES IC (with classification
support). Or PHY with PoDL PSE on one package. If some one know any,
please let me know.

> netlink does allow us to keep adding more attributes, so we don't need
> to be perfect first time, but it seems like 45.2.9 is what IEEE expect
> vendors to provide, so at some point Linux should implement it.

ack.

Regards,
Oleksij
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