linux-kernel - RE: [PATCH v6 0/5] net: macb: cover letter

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Message-ID: <CO2PR07MB246961335F7D401785377765C1C10@CO2PR07MB2469.namprd07.prod.outlook.com>
Date:   Thu, 25 Jul 2019 13:27:58 +0000
From:   Parshuram Raju Thombare <pthombar@...ence.com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     "nicolas.ferre@...rochip.com" <nicolas.ferre@...rochip.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Rafal Ciepiela <rafalc@...ence.com>,
        Piotr Sroka <piotrs@...ence.com>,
        Anil Joy Varughese <aniljoy@...ence.com>,
        Arthur Marris <arthurm@...ence.com>,
        Steven Ho <stevenh@...ence.com>,
        Milind Parab <mparab@...ence.com>
Subject: RE: [PATCH v6 0/5] net: macb: cover letter

Hi Andrew,

>One thing which was never clear is how you are testing the features you are
>adding. Please could you describe your test setup and how each new feature
>is tested using that hardware. I'm particularly interested in what C45 device
>are you using? But i expect Russell would like to know more about SFP
>modules you are using. Do you have any which require 1000BaseX,
>2500BaseX, or provide copper 1G?

Sorry for late reply.
Here is a little more information on our setup used for testing C45 patch with a view to
try clarify a few points. 
Regarding the MDIO communication channel that our controller supports - We have tested
MDIO transfers through Clause 22, but none of our local PHY's support Clause 45 so our hardware
team have created an example Clause 45 slave device for us to add support to the driver.
Note our hardware has been in silicon for 20 years, with customers using their own software to support
MDIO (both clause 22 and clause 45 functionality) and so this has been in Cadence's hardware controller
many times. 
The programming interface is not hugely different between the two clauses and therefore we feel the risk is low.

For other features like SGMII, USXGMII we are using kc705 and vcu118 FPGA boards.
10G SFP+ module from Tyco electronics is used for testing 10G USXGMII in fixed AN mode.

Regards,
Parshuram Thombare