From patchwork Wed Jul 11 21:01:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 10520605 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 5CD52603D7 for ; Wed, 11 Jul 2018 21:03:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4D33129998 for ; Wed, 11 Jul 2018 21:03:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 40FF7299B0; Wed, 11 Jul 2018 21:03:36 +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=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D4E3529998 for ; Wed, 11 Jul 2018 21:03:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390100AbeGKVIE (ORCPT ); Wed, 11 Jul 2018 17:08:04 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:47358 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387710AbeGKVID (ORCPT ); Wed, 11 Jul 2018 17:08:03 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w6BL0CJ5019676 for ; Wed, 11 Jul 2018 17:01:52 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 2k5rv8s920-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 11 Jul 2018 17:01:51 -0400 Received: from localhost by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 11 Jul 2018 15:01:46 -0600 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w6BL1jnQ10551674 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 11 Jul 2018 14:01:45 -0700 Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6F4726E058; Wed, 11 Jul 2018 15:01:45 -0600 (MDT) Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8B0006E052; Wed, 11 Jul 2018 15:01:44 -0600 (MDT) Received: from talon7.ibm.com (unknown [9.41.102.69]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 11 Jul 2018 15:01:44 -0600 (MDT) From: Eddie James To: linux-kernel@vger.kernel.org Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, gregkh@linuxfoundation.org, benh@kernel.crashing.org, linux@roeck-us.net, jdelvare@suse.com, mark.rutland@arm.com, openbmc@lists.ozlabs.org, robh+dt@kernel.org, joel@jms.id.au, Eddie James Subject: [PATCH v4 2/9] Documentation: hwmon: Add OCC documentation Date: Wed, 11 Jul 2018 16:01:31 -0500 X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1531342898-15790-1-git-send-email-eajames@linux.vnet.ibm.com> References: <1531342898-15790-1-git-send-email-eajames@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18071121-0036-0000-0000-00000A0DD7D2 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009352; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01059946; UDB=6.00544035; IPR=6.00837866; MB=3.00022107; MTD=3.00000008; XFM=3.00000015; UTC=2018-07-11 21:01:49 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18071121-0037-0000-0000-00004811018A Message-Id: <1531342898-15790-3-git-send-email-eajames@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-07-11_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1807110221 Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Document the hwmon interface for the OCC. Signed-off-by: Eddie James --- Documentation/hwmon/occ | 73 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 Documentation/hwmon/occ diff --git a/Documentation/hwmon/occ b/Documentation/hwmon/occ new file mode 100644 index 0000000..465fa1a --- /dev/null +++ b/Documentation/hwmon/occ @@ -0,0 +1,73 @@ +Kernel driver occ-hwmon +======================= + +Supported chips: + * POWER8 + * POWER9 + +Author: Eddie James + +Description +----------- + +This driver supports hardware monitoring for the On-Chip Controller (OCC) +embedded on POWER processors. The OCC is a device that collects and aggregates +sensor data from the processor and the system. The OCC can provide the raw +sensor data as well as perform thermal and power management on the system. + +The P8 version of this driver is a client driver of I2C. It may be probed +manually if an "ibm,p8-occ-hwmon" compatible device is found under the +appropriate I2C bus node in the device-tree. + +The P9 version of this driver is a client driver of the FSI-based OCC driver. +It will be probed automatically by the FSI-based OCC driver. + +Sysfs entries +------------- + +The following attributes are supported. All attributes are read-only unless +specified. + +temp[1-n]_label OCC sensor id. +temp[1-n]_input Measured temperature in millidegrees C. +[with temperature sensor version 2+] + temp[1-n]_fru_type Given FRU (Field Replaceable Unit) type. + temp[1-n]_fault Temperature sensor fault. + +freq[1-n]_label OCC sensor id. +freq[1-n]_input Measured frequency. + +power[1-n]_label OCC sensor id. +power[1-n]_input Measured power in microwatts. +power[1-n]_update_tag Number of 250us samples represented in accumulator. +power[1-n]_accumulator Accumulation of 250us power readings. +[with power sensor version 2+] + power[1-n]_function_id Identifies what the power reading is for. + power[1-n]_apss_channel Indicates APSS channel. + +[power version 0xa0 only] +power1_id OCC sensor id. +power[1-n]_label Sensor type, "system", "proc", "vdd", or "vdn". +power[1-n]_input Most recent power reading in microwatts. +power[1-n]_update_tag Number of samples in the accumulator. +power[1-n]_accumulator Accumulation of power readings. +[with sensor type "system" and "proc" only] + power[1-n]_update_time Time in us that the power value is read. + +caps1_current Current OCC power cap in watts. +caps1_reading Current system output power in watts. +caps1_norm Power cap without redundant power. +caps1_max Maximum power cap. +[caps version 1 and 2 only] + caps1_min Minimum power cap. +[caps version 3+] + caps1_min_hard Hard minimum cap that can be set and held. + caps1_min_soft Soft minimum cap below hard, not guaranteed. +caps1_user The powercap specified by the user. Will be 0 if no + user powercap exists. This attribute is read-write. +[caps version 1+] + caps1_user_source Indicates how the user power limit was set. + +extn[1-n]_label ASCII id or sensor id. +extn[1-n]_flags Indicates type of label attribute. +extn[1-n]_input Data.