From nobody Fri Dec 19 09:47:54 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63294EE14D4 for ; Thu, 7 Sep 2023 05:27:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235415AbjIGF1Y (ORCPT ); Thu, 7 Sep 2023 01:27:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240385AbjIGF1O (ORCPT ); Thu, 7 Sep 2023 01:27:14 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.17.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 322C51BC6; Wed, 6 Sep 2023 22:27:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.de; s=s31663417; t=1694064412; x=1694669212; i=w_armin@gmx.de; bh=SDoJ1qMnGGCF705mx2danL58jWUrhbUadtlO+JoIdEg=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=PDDWwnf0seZYJElIw75lF/kUOmMKVt10AhhpSrnhITidM+DAYyOVogvgol+NXWNj7iHbk85 FJVYmhh7PZCLO3JGg3MDS7bBHsgs89lS+L3t+5FRqM0BE/9rXAJdxQmhinNv3hriMEfUg4ANH 8L1fOGvQwUBNKHBp7ibWesxNtSYxTi2h4i2RhiA45arvAeXd244NKpJQA8IFEz9vpP6cIhh1z W6WDR9Qpccdzka6pPKKs7c0vMLjJG5qDJHhrio3YbQl0MG2NvegL9FBmOmXgG+i7EJ3xuYhXr CHfw1HJDCv+yh+5xgtO8q7R0oWJ1yMpvBHtCIvvoFVgT9lmvFwGQ== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from mx-amd-b650.users.agdsn.de ([141.30.226.129]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1M2O6Y-1qdYVW2D7u-003yhB; Thu, 07 Sep 2023 07:26:52 +0200 From: Armin Wolf To: hdegoede@redhat.com Cc: jdelvare@suse.com, linux@roeck-us.net, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 5/5] hwmon: (sch5627) Document behaviour of limit registers Date: Thu, 7 Sep 2023 07:26:39 +0200 Message-Id: <20230907052639.16491-6-W_Armin@gmx.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230907052639.16491-1-W_Armin@gmx.de> References: <20230907052639.16491-1-W_Armin@gmx.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:MediO2xoNHuYZ+J2gpFvJo5Yw3HQt7z9lo3eGzlWwPV0L/tDwYr d5DNXYjIRdAQmg3KNeEEKSjBjD5Yj/4e4kzTXbwIxLboyYi6Yp4gSDfeNZlqd25yEwyizAw da/U4RBJAPjMfypfk3aNZfKN0831a3GW3Yq3JPCK/r1V2xVRkRjT+A5z2TSxP9IT4zVZGXQ 81Rrh3twPrseMpxpV4hNw== UI-OutboundReport: notjunk:1;M01:P0:0CYJA/7Oxe0=;szh2cPWMDtxCBza8+eBbie74N2g qo1q/xGRFJjv8bVE9PdyT2aMSE4aUEZliud5ECymbhtBVkfUlPINfFV4OwhkHG714znuyUuvU E5gEswzc8F2kDZhE+I7LGq+3AzzJMJhFTeiUkHQkqMRrcX7mWwMqinu454UWpoBBc3bb8+dv2 RIO7sC6WcDYAsRqxWkre4J0U9azsD7P6T2khafrirLKgNrIQPZ4yaHAN71g8ZTcF4+9jbwxGn CObACG9X37Aj+gGB2R/qJk0DGr56MngLhbIcJqt079Qt4oENWIc2/PzL2ozbM4wuFucDBaSvK praTHqcOUgOSyxNvu1h5NAkhVO+21YIpCPw1F1Qo2YkXhImQV9L45p0ceTwC2CVVzzPw+1S4U CRyE9TkIsnZ6fjYdRYBeEkzNq64u8CvHSu0J/BvwFbtHEqGZGdtmoNT6f95ZYA4tsBMd+Q/iY AoswUPU9se+Zv0RIQPn6Zi9uX+CGNugNvpDzpkwj8+8cFIUrpb4aYt/tk7/zjHRS8pWgB28U2 3glaU81cbFr+mPdyVpdYrpdK/3FVFLX9U/jcRvXPJ+gi46NN+GMckRTHCh4yRnIrbpLeqpH8l HpkCwZwtpJ/A5rXmG9sjPvBkFeDowyM7DvT/N135o6p7clmvem6AmFLtejyjEhKnbcdRCfI5j lir9s6roAcYL/+Poi+1itEDDiGL0dp7I3/MbUV3SAhnp2qxA54ZbIEffrLo75CGBrdA48DNje Os4I++492rUj62J7WiQOanY0TyeRzfmfGFOG7CE32DS3xFIwWXAtwAodAKuVQbH2Kzd/JQWz4 JcGzRPXpbkfOBEOML44t4R2KXksw+p44uBQajftERcOcxPaput3XkBKw3vEc4Z1wevQPbmp1M wOQYjCREFRt/M+wpqfldJyvY6Wf+CfM77A38HdpKSqPjKYGVjjvZa2IA8fk/AkgQsRF1m+Cl4 j4+r3KVDHvcSrCqvA+0X+B8RBP4= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The values of the limit registers affect the fan speed in a particular way. Document this behaviour so that future users can exploit it if required. Signed-off-by: Armin Wolf --- Documentation/hwmon/sch5627.rst | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/hwmon/sch5627.rst b/Documentation/hwmon/sch5627.= rst index ecb4fc84d045..8639dff234fc 100644 --- a/Documentation/hwmon/sch5627.rst +++ b/Documentation/hwmon/sch5627.rst @@ -33,3 +33,13 @@ The hardware monitoring part of the SMSC SCH5627 is acce= ssed by talking through an embedded microcontroller. An application note describing the protocol for communicating with the microcontroller is available upon request. Please mail me if you want a copy. + + +Controlling fan speed +--------------------- + +The SCH5627 allows for partially controlling the fan speed. If a temperatu= re +channel excedes tempX_max, all fans are forced to maximum speed. The same = is not +true for tempX_crit, presumably some other measures to cool down the syste= m are +take in this case. +In which way the value of fanX_min affects the fan speed is currently unkn= own. -- 2.39.2