linux-kernel - Re: [PATCH v2 4/4] i2c: piix4: Register SPDs

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Message-ID: <afd11870-eab1-4b90-9b81-2a7c84be46e5@t-8ch.de>
Date: Sat, 29 Jun 2024 09:19:48 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Guenter Roeck <linux@...ck-us.net>
Cc: Andi Shyti <andi.shyti@...nel.org>, Jean Delvare <jdelvare@...e.com>, 
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Wolfram Sang <wsa+renesas@...g-engineering.com>, Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH v2 4/4] i2c: piix4: Register SPDs

On 2024-06-28 16:09:09+0000, Guenter Roeck wrote:
> On 6/27/24 10:48, Thomas Weißschuh wrote:
> > The piix4 I2C bus can carry SPDs, register them if present.
> > Only look on bus 0, as this is where the SPDs seem to be located.
> > 
> > Only the first 8 slots are supported. If the system has more,
> > then these will not be visible.
> > 
> > The AUX bus can not be probed as on some platforms it reports all
> > devices present and all reads return "0".
> > This would allow the ee1004 to be probed incorrectly.
> 
> Was this reported somewhere ? I don't see it happen on any of my systems
> (of course that doesn't really mean anything).

It happened on one of the big server systems I tested on.

> > Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
> 
> Reviewed-and-tested-by: Guenter Roeck <linux@...ck-us.net>

Thanks!

FYI, combined tags are discouraged by
Documentation/process/maintainer-tip.rst:

  Please do not use combined tags, e.g. ``Reported-and-tested-by``, as
  they just complicate automated extraction of tags.

I'll add the tags in split form to the patch.


Thomas