linux-kernel - Re: [PATCH net-next 1/2] net: phy: broadcom: set features explicitly for BCM54616S

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Message-ID: <aff2728d-5db1-50fd-767c-29b355890323@fb.com>
Date:   Tue, 30 Jul 2019 05:05:35 +0000
From:   Tao Ren <taoren@...com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        "Arun Parameswaran" <arun.parameswaran@...adcom.com>,
        Justin Chen <justinpopo6@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Jeffery <andrew@...id.au>,
        "openbmc@...ts.ozlabs.org" <openbmc@...ts.ozlabs.org>
Subject: Re: [PATCH net-next 1/2] net: phy: broadcom: set features explicitly
 for BCM54616S

On 7/29/19 8:35 PM, Andrew Lunn wrote:
> On Mon, Jul 29, 2019 at 05:25:32PM -0700, Tao Ren wrote:
>> BCM54616S feature "PHY_GBIT_FEATURES" was removed by commit dcdecdcfe1fc
>> ("net: phy: switch drivers to use dynamic feature detection"). As dynamic
>> feature detection doesn't work when BCM54616S is working in RGMII-Fiber
>> mode (different sets of MII Control/Status registers being used), let's
>> set "PHY_GBIT_FEATURES" for BCM54616S explicitly.
> 
> Hi Tao
> 
> What exactly does it get wrong?
> 
>      Thanks
> 	Andrew

Hi Andrew,

BCM54616S is set to RGMII-Fiber (1000Base-X) mode on my platform, and none of the features (1000BaseT/100BaseT/10BaseT) can be detected by genphy_read_abilities(), because the PHY only reports 1000BaseX_Full|Half ability in this mode.


Thanks,

Tao