linux-kernel - Re: [RFT PATCH v2 2/3] hwmon: (spd5118) Use spd5118 specific read/write operations

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Message-ID: <4755d088-7eab-47ca-923c-db1fdf3611ab@gmx.de>
Date: Wed, 19 Jun 2024 01:28:37 +0200
From: Armin Wolf <W_Armin@....de>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>,
 Guenter Roeck <linux@...ck-us.net>, Paul Menzel <pmenzel@...gen.mpg.de>,
 linux-kernel@...r.kernel.org, René Rebe
 <rene@...ctcode.de>, Thomas Weißschuh
 <linux@...ssschuh.net>, Stephen Horvath <s.horvath@...look.com.au>,
 Sasha Kozachuk <skozachuk@...gle.com>, John Hamrick <johnham@...gle.com>,
 Chris Sarra <chrissarra@...gle.com>, linux-hwmon@...r.kernel.org,
 Jean Delvare <jdelvare@...e.com>
Subject: Re: [RFT PATCH v2 2/3] hwmon: (spd5118) Use spd5118 specific
 read/write operations

Am 19.06.24 um 00:28 schrieb Wolfram Sang:

>> to 86 degrees C. If that doesn't work, we'll be really out of luck
>> with that controller (or at least I don't have an idea what else to try).
> Try CCing Heiner Kallweit for ideas about the i801 controller.
>
Hi,

i am not Heiner Kallweit, but i found something interesting in
commit ba9ad2af7019 ("i2c: i801: Fix I2C Block Read on 8-Series/C220 and later").

Basically, it seems that the i802 i2c controller indeed features a SPD write disable bit
which blocks all writes for slave addresses 0x50-0x57.

Does the i801 i2c controller driver print something like "SPD Write Disable is set" during
boot?

Thanks,
Armin Wolf