From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.molgen.mpg.de (mx3.molgen.mpg.de [141.14.17.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E38D15EFAF; Tue, 18 Jun 2024 23:40:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=141.14.17.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718754048; cv=none; b=eiadt5lx5XK2qR3p35zEpCmY6FYRor11C5TNCqBQdIQI7M7j3vEOsCzdT28VV3T2pDHTWec2K5q3ctg+QEE6RxcUEqq2JKkN0NadinIKJyegtP34t2YOjNYqXwtfPZVJCcKmiFQR9KKYIxatylAJoT3znaLS5K7iu/UQfnazeko= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718754048; c=relaxed/simple; bh=PhVIethmpI/DLAqmGWjDLxd9jxBL8+RTgrvuFYs8qxA=; h=Message-ID:Date:MIME-Version:Subject:To:References:Cc:From: In-Reply-To:Content-Type; b=Qt9cK1cRiTlyTeQcHafuRE1+8ct4+CCwidB876IZ09v0jhnLrW+WZpFjm2i3SpjBg4w49Spk0XM1xLefVSquHEXzLh55M/0/89myvp5RS0AZmD/xj5PkgLYhwuX0JlPmpKq39inAtBcqETi1V0kQXZanxF8j01W3gLK9ljIhscE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=molgen.mpg.de; spf=pass smtp.mailfrom=molgen.mpg.de; arc=none smtp.client-ip=141.14.17.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=molgen.mpg.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=molgen.mpg.de Received: from [192.168.0.2] (ip5f5af4b2.dynamic.kabel-deutschland.de [95.90.244.178]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 02F7D61E5FE01; Wed, 19 Jun 2024 01:39:58 +0200 (CEST) Message-ID: <6845cc2d-c50b-415b-af49-bf57333ee939@molgen.mpg.de> Date: Wed, 19 Jun 2024 01:39:57 +0200 Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFT PATCH v2 2/3] hwmon: (spd5118) Use spd5118 specific read/write operations To: Armin Wolf , Guenter Roeck References: <20240618195348.1670547-1-linux@roeck-us.net> <20240618195348.1670547-3-linux@roeck-us.net> <661def21-b0a9-49c1-937e-8526008f529c@roeck-us.net> <4755d088-7eab-47ca-923c-db1fdf3611ab@gmx.de> Content-Language: en-US Cc: Wolfram Sang , linux-kernel@vger.kernel.org, =?UTF-8?Q?Ren=C3=A9_Rebe?= , =?UTF-8?Q?Thomas_Wei=C3=9Fschuh?= , Stephen Horvath , Sasha Kozachuk , John Hamrick , Chris Sarra , linux-hwmon@vger.kernel.org, Jean Delvare , Heiner Kallweit From: Paul Menzel In-Reply-To: <4755d088-7eab-47ca-923c-db1fdf3611ab@gmx.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit [Cc: +Heiner] Dear Armin, Am 19.06.24 um 01:28 schrieb Armin Wolf: > 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. > 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? Nice find. Yes, it does: [ 5.462605] i801_smbus 0000:00:1f.4: SPD Write Disable is set [ 5.468399] i801_smbus 0000:00:1f.4: SMBus using PCI interrupt Kind regards, Paul