Hi Maxime,

On 09.01.26 18:03, Maxime Chevallier wrote:

ACK, I'll gladly help with testing. This should actually be easily
achievable with a board that has a real i2c interface connected to the
SFP cage, as there's a i2c smbus emulation layer. The SMBus helpers will
work with a true I2C adapter, you may have to tweak the code though.

This is relevant for modules that have a built-in PHY that you can
access, if you don't have any I can run some tests here, I have more
than enough modules...

If you don't have time at all for that, I may give this a shot at some
point, but my time is a bit scarce right now :'(

I'd postpone this part if that's ok. Quite busy at the moment :(

When I come to trying to work on that, should that all be kept in
mdio-i2c.c? I'm asking because we have a downstream implementation
moving that SMbus stuff to mdio-smbus.c. This covers quite a lot right
now, C22/C45 and Rollball, but just with byte access [1]. Because that
isn't my work, I'll need to check with the original authors and adapt this
for an upstream patch, trying to add word + block access.

Kind regards,
Jonas

[1] https://github.com/openwrt/openwrt/blob/66b6791abe6f08dec2924b5d9e9e7dac93f37bc4/target/linux/realtek/patches-6.12/712-net-phy-add-an-MDIO-SMBus-library.patch