Fwd: [RFC PATCH net-next 0/6] Add support for OPEN Alliance 10BASE-T1x MACPHY Serial Interface

[Parthiban.Veerasooran]

Hi,

@Andrew: As you pointed out in another email, I have included Jay 
Monkman as well in this email to discuss further.

@Jay Monkman: Yesterday, Andrew noticed that you submitted a patch 
series for NCN26010 which is a 10BASE-T1S MACPHY which uses OPEN 
Alliance spec.

@Michael Hennerich: I am forwarding this email to you so that you will 
get the history behind this conversation. Please have a look in the 
below email for the clarification we need.

Microchip's product link is below,

https://www.microchip.com/en-us/product/lan8650

We already pushed the driver patches for supporting the above 
Microchip's LAN865x MACPHY and the OPEN Alliance spec to the mainline 
and it is under review. Please refer the below link to get a complete 
picture of this patch series.

https://lore.kernel.org/netdev/20230913152625.73e32789@wsk/T/

We have developed 10BASE-T1x MAC_PHY Serial Interface Specification 
defined by OPEN Alliance TC6 group as a separate framework/generic lib 
and included in this patch series so that all the 10BASE-T1x MACPHY 
vendors can make use of it.

As Andrew suggested, it would be nice if we all work together to make it 
better. Please feel free to share your comments/ideas to improve the 
framework.

 From my next reply on-wards I will include Michael.Hennerich, Ciprian 
Regus and Jay Monkman in the "--to" or "--cc" so that we can share our 
ideas and comments.

I have brought everyone in this email so that we all in sync discussing 
the same topic and sharing our ideas. Please stick with this email or 
other patch series email for further communications to share all our ideas.

I hope this helps. Please let me know if you have any query on this.

Best Regards,
Parthiban V

-------- Forwarded Message --------
Subject: Fwd: [RFC PATCH net-next 0/6] Add support for OPEN Alliance 
10BASE-T1x MACPHY Serial Interface
Date: Mon, 18 Sep 2023 14:32:24 +0530
From: Parthiban Veerasooran <Parthiban.Veerasooran@xxxxxxxxxxxxx>
To: Lennart Franzen <lennart@xxxxxxxxxxxx>, Alexander Dahl 
<ada@xxxxxxxxxxx>, Andrew Lunn <andrew@xxxxxxx>
CC: davem@xxxxxxxxxxxxx, edumazet@xxxxxxxxxx, kuba@xxxxxxxxxx, 
pabeni@xxxxxxxxxx, robh+dt@xxxxxxxxxx, 
krzysztof.kozlowski+dt@xxxxxxxxxx, conor+dt@xxxxxxxxxx, corbet@xxxxxxx, 
steen.hegelund@xxxxxxxxxxxxx, rdunlap@xxxxxxxxxxxxx, horms@xxxxxxxxxx, 
casper.casan@xxxxxxxxx, netdev@xxxxxxxxxxxxxxx, 
devicetree@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, 
linux-doc@xxxxxxxxxxxxxxx, horatiu.vultur@xxxxxxxxxxxxx, 
Woojung.Huh@xxxxxxxxxxxxx, Nicolas.Ferre@xxxxxxxxxxxxx, 
UNGLinuxDriver@xxxxxxxxxxxxx, Thorsten.Kummermehr@xxxxxxxxxxxxx

Hi Lennart,

I am forwarding this email to you as we are not able to reach the module 
author Alexandru Tachici <alexandru.tachici@xxxxxxxxxx> and getting the 
below email delivery error.

----cut here-----
Delivery has failed to these recipients or groups:

alexandru.tachici@xxxxxxxxxx<mailto:alexandru.tachici@xxxxxxxxxx>
The email address you entered couldn't be found. Please check the
recipient's email address and try to resend the message. If the problem
continues, please contact your email admin.
----cut here------

We got your your email address from the commit 
bc93e19d088bb14e116756ab270deea6ee62d782. Regarding the below topic, are 
you the right contact parson to continue further on this topic or else 
do you have any other contact to approach? Please let us know.

Best Regards,
Parthiban V
-------- Forwarded Message --------
Subject: Re: [RFC PATCH net-next 0/6] Add support for OPEN Alliance 
10BASE-T1x MACPHY Serial Interface
Date: Mon, 18 Sep 2023 11:42:33 +0530
From: Parthiban Veerasooran <Parthiban.Veerasooran@xxxxxxxxxxxxx>
To: ada@xxxxxxxxxxx, Alexandru Tachici <alexandru.tachici@xxxxxxxxxx>, 
Andrew Lunn <andrew@xxxxxxx>
CC: davem@xxxxxxxxxxxxx, edumazet@xxxxxxxxxx, kuba@xxxxxxxxxx, 
pabeni@xxxxxxxxxx, robh+dt@xxxxxxxxxx, 
krzysztof.kozlowski+dt@xxxxxxxxxx, conor+dt@xxxxxxxxxx, corbet@xxxxxxx, 
steen.hegelund@xxxxxxxxxxxxx, rdunlap@xxxxxxxxxxxxx, horms@xxxxxxxxxx, 
casper.casan@xxxxxxxxx, netdev@xxxxxxxxxxxxxxx, 
devicetree@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, 
linux-doc@xxxxxxxxxxxxxxx, horatiu.vultur@xxxxxxxxxxxxx, 
Woojung.Huh@xxxxxxxxxxxxx, Nicolas.Ferre@xxxxxxxxxxxxx, 
UNGLinuxDriver@xxxxxxxxxxxxx, Thorsten.Kummermehr@xxxxxxxxxxxxx

Hi Alexander,

Thanks for the information. Please see my reply below.

On 15/09/23 7:26 pm, Alexander Dahl wrote:
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> 
> Hello,
> 
> this is interesting, by chance I just looked at a chip claiming
> similar features today, which already has a driver in kernel: Analog
> Devices ADIN1110.
Microchip's LAN865x is a 10BASE-T1S MACPHY and Analog Devices's ADIN1110 
is a 10BASE-T1L MACPHY. So as you said 10BASE-T1x MAC_PHY Serial 
Interface Specification defined by OPEN Alliance TC6 group can be 
applicable for both of the devices. I also noticed that ADI's datasheet 
says ADIN1110 supports OPEN Alliance 10BASE-T1x MAC-PHY serial
interface.
https://www.analog.com/media/en/technical-documentation/data-sheets/adin1110.pdf

But in my first glance in their driver code, I don't see any code block 
which implements 10BASE-T1x MAC_PHY Serial Interface Specification 
defined by OPEN Alliance TC6 group. Or do I miss anything here?. My code 
reference is below FYR,
https://elixir.bootlin.com/linux/v6.6-rc2/source/drivers/net/ethernet/adi/adin1110.c

OPEN Alliance 10BASE-T1x MAC_PHY Serial Interface Specification cab be 
downloaded from the below link,
https://opensig.org/automotive-ethernet-specifications/

I think Alexandru Tachici from ADI would be able to give us more 
information on this direction.
> 
> Am Fri, Sep 08, 2023 at 07:59:13PM +0530 schrieb Parthiban Veerasooran:
>> This patch series contain the below updates,
>> - Adds support for OPEN Alliance 10BASE-T1x MACPHY Serial Interface in the
>>    net/ethernet/oa_tc6.c.
> 
> So this implements the "10BASE-T1x MAC-PHY Serial Interface
> Specification" which is Ethernet over SPI if I understand correctly?
> The above mentioned chip claims do use the same interface and the same
> standard.  How does its driver work then?  Do you add code for a thing
> already present in the kernel or does the other driver do something
> completely different and I just misunderstood?
As I mentioned above, in my first glance in their driver code, I don't 
see any code block which implements 10BASE-T1x MAC_PHY Serial Interface 
Specification defined by OPEN Alliance TC6 group. Let's Alexandru 
Tachici from ADI gives us more info on this.
> 
> Can the drivers for ADIN1110 and for LAN865X share code because they
> use the same specified interface?  The patch set does not look like
> it?
Of course, if their device supports OPEN Alliance then we can use this 
oa_tc6.c framework to support other 10BASE-T1x MACPHY's as well.
> 
> (Added the other driver author to Cc.)
Ok thanks.

Best Regards,
Parthiban V
> 
> Greets
> Alex
> 
>> - Adds driver support for Microchip LAN8650/1 Rev.B0 10BASE-T1S MACPHY
>>    Ethernet driver in the net/ethernet/microchip/lan865x.c.
>>
>> Parthiban Veerasooran (6):
>>    net: ethernet: implement OPEN Alliance control transaction interface
>>    net: ethernet: add mac-phy interrupt support with reset complete
>>      handling
>>    net: ethernet: implement OA TC6 configuration function
>>    net: ethernet: implement data transaction interface
>>    microchip: lan865x: add driver support for Microchip's LAN865X MACPHY
>>    microchip: lan865x: add device-tree support for Microchip's LAN865X
>>      MACPHY
>>
>>   .../bindings/net/microchip,lan865x.yaml       |  54 ++
>>   Documentation/networking/oa-tc6-framework.rst | 231 +++++
>>   MAINTAINERS                                   |  15 +
>>   drivers/net/ethernet/microchip/Kconfig        |  10 +
>>   drivers/net/ethernet/microchip/Makefile       |   3 +
>>   drivers/net/ethernet/microchip/lan865x.c      | 589 +++++++++++++
>>   drivers/net/ethernet/oa_tc6.c                 | 807 ++++++++++++++++++
>>   include/linux/oa_tc6.h                        | 130 +++
>>   8 files changed, 1839 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/net/microchip,lan865x.yaml
>>   create mode 100644 Documentation/networking/oa-tc6-framework.rst
>>   create mode 100644 drivers/net/ethernet/microchip/lan865x.c
>>   create mode 100644 drivers/net/ethernet/oa_tc6.c
>>   create mode 100644 include/linux/oa_tc6.h
>>
>> --
>> 2.34.1
>>
>>