Re: [PATCH net-next] misc: Add Renesas Synchronization Management Unit (SMU) support

On Wed, 17 Feb 2021 22:30:14 +0100 Arnd Bergmann wrote:

On Wed, Feb 17, 2021 at 9:20 PM Min Li [off-list ref] wrote:

quoted

I attached the G.8273.2 document, where chapter 6 is about supporting physical layer
frequency. And combo mode is Renesas way to support this requirement. Other companies
may come up with different ways to support it.

When EEC quality is below certain level, we would wanna turn off combo mode.  

Maybe this is something that could be handled inside of the device driver then?

If the driver can use the same algorithm that is in your user space software
today, that would seem to be a nicer way to handle it than requiring a separate
application.

Other points sound more time than networking, so no suggestions
from me, but on using PHC for L1 freq - that seems like a good 
fit for ethtool?