From patchwork Wed Feb 21 16:16:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jae Hyun Yoo X-Patchwork-Id: 10233475 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DE39E60209 for ; Wed, 21 Feb 2018 16:21:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DE8272879C for ; Wed, 21 Feb 2018 16:21:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D2E8F28B59; Wed, 21 Feb 2018 16:21:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3D6402879C for ; Wed, 21 Feb 2018 16:21:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=lj+Y04Q8ObztD3cxPlIkFTTbFNM+t5RVxzjVd4sy6V4=; b=o5uLU4hbhvCStoSwJkwJefj7Pi gLjfN/sJpWlU/QAze9W4I76BIVemV4ofa4al3IsjeLW90xrO94gdjRcsVKdfe8BQFBTBgCRGDGIHm +U8ddsWAFhWM6FRYTrY8cLTD+NCoStE0rCD7lzv3l+YzTaqEKXz38tXQucPOwkOG8LZG4N1aHYhoO xr7J9JAdm33lGycZa6oTTt4weeBIQSfLCtImmoowOvZZ3xOMBdcdSYbmkJm2y+lsLI+keYRFL8Vpx d3D7ohskpbO70shfAQXUxPwM+WLKMseRAxmvB4jUhiR/FM2KvHr2RCFmeZE1GhkTsxkQIL2QWo0Us Ihu5qSEQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1eoX9D-0002Rb-Ml; Wed, 21 Feb 2018 16:21:35 +0000 Received: from mga02.intel.com ([134.134.136.20]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1eoX6r-0006so-Rm for linux-arm-kernel@lists.infradead.org; Wed, 21 Feb 2018 16:21:10 +0000 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Feb 2018 08:16:23 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,543,1511856000"; d="scan'208";a="29617854" Received: from maru.jf.intel.com ([10.54.51.80]) by orsmga003.jf.intel.com with ESMTP; 21 Feb 2018 08:16:23 -0800 From: Jae Hyun Yoo To: joel@jms.id.au, andrew@aj.id.au, arnd@arndb.de, gregkh@linuxfoundation.org, jdelvare@suse.com, linux@roeck-us.net, benh@kernel.crashing.org, andrew@lunn.ch Subject: [PATCH v2 6/8] [PATCH 6/8] Documentation: hwmon: Add a document for PECI hwmon client driver Date: Wed, 21 Feb 2018 08:16:04 -0800 Message-Id: <20180221161606.32247-7-jae.hyun.yoo@linux.intel.com> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180221161606.32247-1-jae.hyun.yoo@linux.intel.com> References: <20180221161606.32247-1-jae.hyun.yoo@linux.intel.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180221_081910_083845_B7CA6F27 X-CRM114-Status: GOOD ( 16.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, Jae Hyun Yoo , linux-doc@vger.kernel.org, openbmc@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This commit adds a hwmon document for a generic PECI hwmon client driver. Signed-off-by: Jae Hyun Yoo --- Documentation/hwmon/peci-hwmon | 73 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 Documentation/hwmon/peci-hwmon diff --git a/Documentation/hwmon/peci-hwmon b/Documentation/hwmon/peci-hwmon new file mode 100644 index 000000000000..93e587498536 --- /dev/null +++ b/Documentation/hwmon/peci-hwmon @@ -0,0 +1,73 @@ +Kernel driver peci-hwmon +=============================== + +Supported chips: + Any recent Intel CPU which is connected through a PECI bus. + Addresses scanned: PECI client address 0x30 - 0x37 + Datasheet: Available from http://www.intel.com/design/literature.htm + +Author: + Jae Hyun Yoo + +Description +----------- + +This driver implements a generic PECI hwmon feature which provides Digital +Thermal Sensor (DTS) thermal readings of the CPU package, CPU cores and DIMM +components that are accessible using the PECI Client Command Suite via the +processor PECI client. + +All temperature values are given in millidegree Celsius and will be measurable +only when the target CPU is powered on. + +sysfs attributes +---------------- + +temp1_input Provides current die temperature of the CPU package. +temp1_max Provides thermal control temperature of the CPU package + which is also known as Tcontrol. +temp1_crit Provides shutdown temperature of the CPU package which + is also known as the maximum processor junction + temperature, Tjmax or Tprochot. +temp1_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of + the CPU package. + +temp2_input Provides current DTS thermal margin to Tcontrol of the + CPU package. Value 0 means it reaches to Tcontrol + temperature. Sub-zero value means the die temperature + goes across Tconrtol to Tjmax. +temp2_min Provides the minimum DTS thermal margin to Tcontrol of + the CPU package. +temp2_lcrit Provides the value when the CPU package temperature + reaches to Tjmax. + +temp3_input Provides current Tcontrol temperature of the CPU + package which is also known as Fan Temperature target. + Indicates the relative value from thermal monitor trip + temperature at which fans should be engaged. +temp3_crit Provides Tcontrol critical value of the CPU package + which is same to Tjmax. + +temp4_input Provides current Tthrottle temperature of the CPU + package. Used for throttling temperature. If this value + is allowed and lower than Tjmax - the throttle will + occur and reported at lower than Tjmax. + +temp5_input Provides the maximum junction temperature, Tjmax of the + CPU package. + +temp_label Provides core temperature if this label indicates + 'Core #'. +temp[n]_input Provides current temperature of each core. +temp[n]_max Provides thermal control temperature of the core. +temp[n]_crit Provides shutdown temperature of the core. +temp[n]_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of + the core. + +temp_label Provides DDR DIMM temperature if this label indicates + 'DIMM #'. +temp_input Provides current temperature of the DDR DIMM. + +Note: + DIMM temperature group will be appeared when the client CPU's BIOS + completes memory training and testing.