Re: [Linuxptp-devel] [PATCH v3 00/11] synce4l: add software for Synchronous Ethernet

[Kubalewski, A. <ark...@in...>]

-----Original Message-----
From: Aya Levin <ay...@nv...> 
Sent: Wednesday, June 22, 2022 3:42 PM
>
>On 6/21/2022 6:25 PM, Kubalewski, Arkadiusz wrote:
>> -----Original Message-----
>> From: Aya Levin <ay...@nv...>
>> Sent: Sunday, June 19, 2022 6:35 PM
>>>
>>> Hi,
>>>
>>> Please elaborate regarding kernel API. I understood from the submission
>>> that you plan to start off with some vendor specific sysfs declared in
>>> the config file.
>>> But I believe this is not the final goal, correct?
>>> Do you have kernel patches for review?
>>>
>>> Thanks,
>>> Aya
>> 
>> Hi,
>> 
>> SyncE standard needs two abilities from the Network Interface Card:
>> - check the status of frequency loop, if it is locked/holdover/etc
>> - select one of the PHY ports as a signal source.
>What about set status - when SyncE state machine needs to move to holdover?

Sorry, I missed this question.
Yes, definitely we need it both, ability to enable and disable clock recovery
on a net-device PHY port.

Thanks,
Arkadiusz

>> 
>> Currently in sync4l both of those abilities are provided in form of shell
>> commands, so it can be used with any user-space tool.
>> 
>> For the future, the plan is to have generic netlink based interface/subsystem
>> in the kernel. Designed for all devices capable of syntonizing its clock to an
>> external source (I am working on it right now), probably also equipped with
>> generic sysfs for manual control.
>> 
>> Thank you,
>> Arkadiusz
>