From: Murali Karicheri <m-karicheri2@ti•com>
To: Florian Fainelli <f.fainelli@gmail•com>, <johan@kernel•org>,
"open list:TI NETCP ETHERNET DRIVER" <netdev@vger•kernel.org>,
"Kwok, WingMan" <w-kwok2@ti•com>
Subject: Re: Micrel Phy - Is there a way to configure the Phy not to do 802.3x flow control?
Date: Thu, 10 Mar 2016 11:48:31 -0500 [thread overview]
Message-ID: <56E1A55F.3090906@ti.com> (raw)
In-Reply-To: <56D8D3D7.6070900@gmail.com>
On 03/03/2016 07:16 PM, Florian Fainelli wrote:
> On 03/03/16 14:18, Murali Karicheri wrote:
>> Hi,
>>
>> We are using Micrel Phy in one of our board and wondering if we can force the
>> Phy to disable flow control at start. I have a 1G ethernet switch connected
>> to Phy and the phy always enable flow control. I would like to configure the
>> phy not to flow control. Is that possible and if yes, what should I do in the
>> my Ethernet driver to tell the Phy not to enable flow control?
>
> The PHY is not doing flow control per-se, your pseudo Ethernet MAC in
> the switch is doing, along with the link partner advertising support for
> it. You would want to make sure that your PHY device interface (provided
> that you are using the PHY library) is not starting with Pause
> advertised, but it could be supported.
Understood that Phy is just advertise FC. The Micrel phy for 9031 advertise
by default FC supported. After negotiation, I see that Phylib provide the
link status with parameter pause = 1, asym_pause = 1. How do I tell the Phy not
to advertise?
I call following sequence in the Ethernet driver.
of_phy_connect(x,y,hndlr,a,z);
phy_start()
Now in hndlr() I have pause = 1, asym_pause = 1, in phy_device ptr. How can
I tell the phy not to advertise initially?
Murali
>
> As Andrew indicated the proper way to do this is do to use ethtool if
> you need to this dynamically.
>
--
Murali Karicheri
Linux Kernel, Keystone
next prev parent reply other threads:[~2016-03-10 16:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-03 22:18 Micrel Phy - Is there a way to configure the Phy not to do 802.3x flow control? Murali Karicheri
2016-03-03 22:26 ` Andrew Lunn
2016-03-10 15:07 ` Murali Karicheri
2016-03-04 0:16 ` Florian Fainelli
2016-03-10 16:48 ` Murali Karicheri [this message]
2016-03-10 18:05 ` Florian Fainelli
2016-03-10 19:38 ` Murali Karicheri
2016-03-10 22:51 ` Murali Karicheri
2016-03-11 18:31 ` Murali Karicheri
2016-03-11 19:51 ` Florian Fainelli
2016-03-16 15:08 ` Murali Karicheri
2016-03-16 15:16 ` Murali Karicheri
2016-03-18 0:10 ` Florian Fainelli
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