netdev - Re: Support for Ethernet Phy interfaced through i2c bus

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Message-ID: <CAGnW=BYMCXAu8f6TgiXCPB11ufKrKdt5wH0VhUH1x8oYkvtZ9g@mail.gmail.com>
Date:	Mon, 15 Jun 2015 17:17:22 +0530
From:	punnaiah choudary kalluri <punnaia@...inx.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, Punnaiah Choudary <kpc528@...il.com>,
	punnaiah choudary kalluri <kalluripunnaiahchoudary@...il.com>,
	appanad@...inx.com
Subject: Re: Support for Ethernet Phy interfaced through i2c bus

Any inputs on this ?

Regards,
Punnaiah

On Tue, May 26, 2015 at 9:23 PM, punnaiah choudary kalluri
<punnaia@...inx.com> wrote:
> Hi,
>
> I have a design for adding the sgmii support to the Ethernet mac.
> The Ethernet mac is interfaced to the SGMII core and the mdio interface
> from the mac is connected to the sgmii core for querying the link status
> and autonegotaiation status.
> The external phy is connected to the i2c bus and it is accessed through
> i2c controller.
>
> I have tested this design with out registering phy framework and configured
> the external phy using the i2c lib and modified the Ethernet driver to include
> code for accessing the sgmii core using the mdio interface.
>
> Now i am looking for a solution to implement the following requirement using the
> existing phy framework. But it looks the current phy framework is using only
> the mdio bus.
>
> Could some one suggest the better approach or solution for
> implementing the below
> requirement.
>
>
>     --------
>    |        |   I2C
>    | I2c   |----------------
>    | ctrl|   |               |
>     ---------                |
>     ----------               |                                  -----------
>    |          |              -------------------------------- |           |
>    | MAC  |                                               |           |
>    |          |    MDIO     ------------     TX/RX   |   PHY |
>    |          |---------------- |            |---------------- |           |
>    |          | GMII         | SGMII |                 |           |
>    |          | --------------- |            |                  -----------
>     ----------                  |            |
>                                  ----------
> Regards,
> Punnaiah
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