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Date:   Sat, 23 Mar 2019 04:19:32 +0000
From:   Parshuram Raju Thombare <>
To:     Andrew Lunn <>
CC:     "" <>,
        "" <>,
        "" <>,
        "" <>,
        "" <>,
        "" <>,
        Rafal Ciepiela <>,
        Piotr Sroka <>, Jan Kotas <>
Subject: RE: [PATCH v2 2/3] net: ethernet: cadence: add c45 PHY support in
 MDIO read/write functions.

>-----Original Message-----
>From: Andrew Lunn <>
>Sent: Thursday, March 21, 2019 7:55 PM
>To: Parshuram Raju Thombare <>
>;;; linux-
>; Rafal Ciepiela <>; Piotr Sroka
><>; Jan Kotas <>
>Subject: Re: [PATCH v2 2/3] net: ethernet: cadence: add c45 PHY support in MDIO
>read/write functions.
>On Mon, Mar 18, 2019 at 05:42:28PM +0000, Parshuram Thombare wrote:
>> Sorry for sending this patch again, but I didn't sent previous email
>> --in-reply-to last comment on v1 of this patch. So rectifying this
>> mistake.
>> This version 2 of patch to modify MDIO read/write functions to support
>> communication with C45 PHY in Cadence ethernet controller driver.
>> Changes:
>> 	1. Added timeout
>> 	2. Removed unused operation macro
>> I thought of starting with relatively smaller, independant and simpler changes.
>> This patch is independant of patch series and looks relatively
>> straight forward with aim of supporting C45 PHY for support of high speed
>Hi Parshuram
>Something i asked last time, but i'm not sure i got an answer.  Do all generations
>of the MDIO controller support C45? If the older versions only support C22, we
>need to be sure it does the right thing when asked to do a C45 transfer.

Hi Andrew,

There are some older versions of controller which doesn't support C45. I will make
sure that driver return error for C45 transfer requests when it is not supported by

>      Andrew

Parshuram Thombare

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