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Subject: Re: [PATCH net-next 2/2] net: phy: dp83td510: Add support for the
 DP83TD510 Ethernet PHY
From:   Dan Murphy <dmurphy@ti.com>
To:     Andrew Lunn <andrew@lunn.ch>
CC:     <davem@davemloft.net>, <f.fainelli@gmail.com>,
        <hkallweit1@gmail.com>, <netdev@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
References: <20201008162347.5290-1-dmurphy@ti.com>
 <20201008162347.5290-3-dmurphy@ti.com> <20201016220240.GM139700@lunn.ch>
 <31cbfec4-3f1c-d760-3035-2ff9ec43e4b7@ti.com>
 <20201019215506.GY139700@lunn.ch>
 <4add1229-ad74-48e9-064d-e12d62ecc574@ti.com>
Message-ID: <0e7c70ad-91f0-b3b7-bf28-c258f1a0a0e0@ti.com>
Date:   Tue, 20 Oct 2020 07:00:15 -0500
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Andrew

On 10/19/20 5:04 PM, Dan Murphy wrote:
> Andrew
>
> On 10/19/20 4:55 PM, Andrew Lunn wrote:
>> On Mon, Oct 19, 2020 at 04:33:18PM -0500, Dan Murphy wrote:
>>> Andrew
>>>
>>> On 10/16/20 5:02 PM, Andrew Lunn wrote:
>>>> On Thu, Oct 08, 2020 at 11:23:47AM -0500, Dan Murphy wrote:
>>>>> The DP83TD510E is an ultra-low power Ethernet physical layer 
>>>>> transceiver
>>>>> that supports 10M single pair cable.
>>>> Hi Dan
>>>>
>>>> I think you are going to have to add
>>>> ETHTOOL_LINK_MODE_10baseT1_Full_BIT? We already have 100T1 and 1000T1,
>>>> but not 10T1 :-(
>>> The data sheet says 10baseT1L.  Which is not there either and seems 
>>> to be
>>> the latest 802.3cg spec and has a greater max distance and used for 
>>> IoT and
>>> Automotive.
>> Hi Dan
>>
>> Do you know anything about interropibility? Can a T1 and a T1L talk to
>> each other, if suitably close? I'm wondering if this device should say
>> it is both T1 and T1L? Or just T1L?
>
> I personally don't know about interoperability my tests were T1L to 
> T1L but I forwarded these questions to my HW PHY team.
>
HW team says no to interoperability.  So we can just add T1L and 
advertise that type.

The DP83TD510L capability is limited to 10Base-T1L only.

Dan