linux-kernel - Re: [PATCH net-next v6 4/4] phy: marvell: Add support for the PHY embedded in the topaz switch

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Message-ID: <87efzs2n6b.fsf@free-electrons.com>
Date:   Tue, 24 Jan 2017 21:55:08 +0100
From:   Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Jason Cooper <jason@...edaemon.net>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        linux-arm-kernel@...ts.infradead.org,
        Nadav Haklai <nadavh@...vell.com>,
        Wilson Ding <dingwei@...vell.com>,
        Kostya Porotchkin <kostap@...vell.com>,
        Joe Zhou <shjzhou@...vell.com>,
        Jon Pannell <jpannell@...vell.com>
Subject: Re: [PATCH net-next v6 4/4] phy: marvell: Add support for the PHY embedded in the topaz switch

Hi Andrew,
 
 On mar., janv. 24 2017, Andrew Lunn <andrew@...n.ch> wrote:

> On Tue, Jan 24, 2017 at 09:10:26PM +0100, Gregory CLEMENT wrote:
>> The PHY with the ID 0x1410C00
>
> :-(
>
> I don't have a better reference, but
> Linux/Documentation/devicetree/bindings/net/phy.txt says:
>
>  22   If the phy's identifier is known then the list may contain an entry
>  23   of the form: "ethernet-phy-idAAAA.BBBB" where
>  24      AAAA - The value of the 16 bit Phy Identifier 1 register as
>  25             4 hex digits. This is the chip vendor OUI bits 3:18
>  26      BBBB - The value of the 16 bit Phy Identifier 2 register as
>  27             4 hex digits. This is the chip vendor OUI bits 19:24,
>  28             followed by 10 bits of a vendor specific ID.
>
> So the lower 10 bits of 0x1410C00 are 0. So we know it is a Marvell
> PHY from the OUI, but the vendor specific bits are all 0.

In your previous email you mention a value of 0x01410000, so when I saw
the "C00" at the end I was happy and I didn't look for further.

>
> Please take a look at:
>
> https://marc.info/?l=linux-netdev&m=148495522620757&w=1
>
> and
>
> https://marc.info/?l=linux-netdev&m=148495510320714&w=1
>
> Maybe i should submit these two independently, so you can extend it
> for the 88E6341 family.

Please do it :)

The feedback from Florian and Vivian was good about it so I see no
reason to not apply them.

Add me in CC so I will now when to rebase my series.

Thanks,

Gregory

>
>     Andrew

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com