netdev - Re: [PATCH net-next 3/3] net: bcmgenet: Add support for 7712 16nm internal EPHY

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Message-ID: <2da4e5f6-63d8-73d6-7dbd-e3e541f91ac5@gmail.com>
Date:   Fri, 22 Oct 2021 12:38:45 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org, Doug Berger <opendmb@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "open list:BROADCOM GENET ETHERNET DRIVER" 
        <bcm-kernel-feedback-list@...adcom.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next 3/3] net: bcmgenet: Add support for 7712 16nm
 internal EPHY

Hello Andrew,

On 10/22/21 12:36 PM, Andrew Lunn wrote:
> On Fri, Oct 22, 2021 at 09:17:03AM -0700, Florian Fainelli wrote:
>> The 16nm internal EPHY that is present in 7712 is actually a 16nm
>> Gigabit PHY which has been forced to operate in 10/100 mode.
> 
> Hi Florian
> 
> Will genphy_read_abilities() detect it as a 1G PHY? Does bcmgenet.c
> need to call phy_set_max_speed() to stop it advertising 1G?

That is not necessary, the capabilities have been adjusted accordingly,
the PHY only advertises 10/100 and not above.
-- 
Florian