Re: [PATCH net-next 0/2] net: phy: sfp: Add single-byte SMBus SFP access

[Bjørn Mork]

"Russell King (Oracle)" <linux@xxxxxxxxxxxxxxx> writes:

>> I believe you are reading more into the spec than what's actually there.
>
> So I'm making up the quote above from SFF-8472.  Okay, if that's where
> this discussion is going, I'm done here.

No, not at all.  That was not what I meant.  Please accept my apologies.
This came out wrong. You are absolutely correct about reading the 16bit
diagnostic registers you quoted. I would never doubt that. I have an
extreme respect for you and your knowledge of these standards and the
practical hardware implications.

It was the conclusion that this fact prevents SMBus hosts I wanted to
question.  I still don't see that.  Some SMBus hosts might be able do 2
byte reads.  And if they can't, then I believe they can safely ignore
these registers without being out of spec.  Like the proposed solution.

I'll shut up now, to avoid confusing the discussion of Maxime's patches
further.


Bjørn