linux-kernel - Re: [PATCH net-master 1/1] net: phy: dp83867: Add speed optimization feature

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Date:   Fri, 31 Jan 2020 11:14:05 -0600
From:   Dan Murphy <dmurphy@...com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     <andrew@...n.ch>, <f.fainelli@...il.com>, <hkallweit1@...il.com>,
        <bunk@...nel.org>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <grygorii.strashko@...com>
Subject: Re: [PATCH net-master 1/1] net: phy: dp83867: Add speed optimization
 feature

Jakub

On 1/31/20 11:10 AM, Jakub Kicinski wrote:
> On Fri, 31 Jan 2020 09:11:10 -0600, Dan Murphy wrote:
>> Set the speed optimization bit on the DP83867 PHY.
>> This feature can also be strapped on the 64 pin PHY devices
>> but the 48 pin devices do not have the strap pin available to enable
>> this feature in the hardware.  PHY team suggests to have this bit set.
>>
>> With this bit set the PHY will auto negotiate and report the link
>> parameters in the PHYSTS register and not in the BMCR.  So we need to
>> over ride the genphy_read_status with a DP83867 specific read status.
>>
>> Signed-off-by: Dan Murphy <dmurphy@...com>
> While we wait for the PHY folk to take a look, could you please
> provide a Fixes tag?

Hmm. This is not a bug fix though this is a new feature being added.

Not sure what it would be fixing.

Dan