Re: MDIO Debug Interface

On Thu Jul 9, 2020 at 5:36 PM CEST, Florian Fainelli wrote:

Certainly, the current interface clearly has deficiencies and since
mdio_device instances were introduced, we should have an interface to
debug those from user-space ala i2c-dev or spidev.

Can you post the kernel code for review? Would you entertain having mdio

Certainly. I just linked to the repo to show how the userspace part
would look in combination with the netlink interface, and to see if I
was in ice-cube-in-hell territory or slightly better :)

as an user-space command being part of ethtool for instance (just to
ease the distribution)?

If by "ethtool" you mean the project, then yes. But I think it should
be a separate binary as ethtool is very interface centric.

We might not want to restrict ourselves to a single tool either. A
binary that can do basic register read/write seems like a good fit for
shipping alongside ethtool. But a tool to read/write the LinkCrypt
registers of a Marvell PHY, as an example, might be too specific and
better managed in a separate repo.

--
Florian