From patchwork Tue Jan 31 15:43:56 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 9547731 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 C79A46016C for ; Tue, 31 Jan 2017 16:38:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B6B8B283E1 for ; Tue, 31 Jan 2017 16:38:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A99B7283EB; Tue, 31 Jan 2017 16:38:37 +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=-6.9 required=2.0 tests=BAYES_00,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 14327283E1 for ; Tue, 31 Jan 2017 16:38:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751444AbdAaQig (ORCPT ); Tue, 31 Jan 2017 11:38:36 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:46731 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751064AbdAaQig (ORCPT ); Tue, 31 Jan 2017 11:38:36 -0500 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v0VFi7Nn078674 for ; Tue, 31 Jan 2017 10:44:19 -0500 Received: from e38.co.us.ibm.com (e38.co.us.ibm.com [32.97.110.159]) by mx0a-001b2d01.pphosted.com with ESMTP id 28akc1877k-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 31 Jan 2017 10:44:18 -0500 Received: from localhost by e38.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 31 Jan 2017 08:44:14 -0700 Received: from b01cxnp22034.gho.pok.ibm.com (b01cxnp22034.gho.pok.ibm.com [9.57.198.24]) by d03dlp01.boulder.ibm.com (Postfix) with ESMTP id D44E21FF002A; Tue, 31 Jan 2017 08:43:51 -0700 (MST) Received: from b01ledav001.gho.pok.ibm.com (b01ledav001.gho.pok.ibm.com [9.57.199.106]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v0VFiBEl42926278; Tue, 31 Jan 2017 15:44:13 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 704BA28056; Tue, 31 Jan 2017 10:44:13 -0500 (EST) Received: from oc3016140333.ibm.com (unknown [9.41.179.225]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTP id 668522803E; Tue, 31 Jan 2017 10:44:12 -0500 (EST) From: eajames@linux.vnet.ibm.com To: linux@roeck-us.net Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, jdelvare@suse.com, corbet@lwn.net, mark.rutland@arm.com, robh+dt@kernel.org, wsa@the-dreams.de, andrew@aj.id.au, joel@jms.id.au, benh@kernel.crashing.org, "Edward A. James" Subject: [PATCH linux v5 5/6] hwmon: occ: Add hwmon implementation for the P8 OCC Date: Tue, 31 Jan 2017 09:43:56 -0600 X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1485877437-13598-1-git-send-email-eajames@linux.vnet.ibm.com> References: <1485877437-13598-1-git-send-email-eajames@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 17013115-0028-0000-0000-000006ED2AD2 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006531; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000201; SDB=6.00815265; UDB=6.00397992; IPR=6.00592707; BA=6.00005103; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00014123; XFM=3.00000011; UTC=2017-01-31 15:44:17 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17013115-0029-0000-0000-0000332E94A6 Message-Id: <1485877437-13598-6-git-send-email-eajames@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-01-31_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=13 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1612050000 definitions=main-1701310136 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 From: "Edward A. James" Add code to tie the hwmon sysfs code and the POWER8 OCC code together, as well as probe the entire driver from the I2C bus. I2C is the communication method between the BMC and the P8 OCC. Signed-off-by: Edward A. James Signed-off-by: Andrew Jeffery Acked-by: Rob Herring --- Documentation/devicetree/bindings/hwmon/occ.txt | 13 +++ drivers/hwmon/occ/Kconfig | 14 ++++ drivers/hwmon/occ/Makefile | 1 + drivers/hwmon/occ/p8_occ_i2c.c | 104 ++++++++++++++++++++++++ 4 files changed, 132 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/occ.txt create mode 100644 drivers/hwmon/occ/p8_occ_i2c.c diff --git a/Documentation/devicetree/bindings/hwmon/occ.txt b/Documentation/devicetree/bindings/hwmon/occ.txt new file mode 100644 index 0000000..b0d2b36 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/occ.txt @@ -0,0 +1,13 @@ +HWMON I2C driver for IBM POWER CPU OCC (On Chip Controller) + +Required properties: + - compatible: must be "ibm,p8-occ-i2c" + - reg: physical address + +Example: +i2c3: i2c-bus@100 { + occ@50 { + compatible = "ibm,p8-occ-i2c"; + reg = <0x50>; + }; +}; diff --git a/drivers/hwmon/occ/Kconfig b/drivers/hwmon/occ/Kconfig index cdb64a7..3a5188f 100644 --- a/drivers/hwmon/occ/Kconfig +++ b/drivers/hwmon/occ/Kconfig @@ -13,3 +13,17 @@ menuconfig SENSORS_PPC_OCC This driver can also be built as a module. If so, the module will be called occ. + +if SENSORS_PPC_OCC + +config SENSORS_PPC_OCC_P8_I2C + tristate "POWER8 OCC hwmon support" + depends on I2C + help + Provide a hwmon sysfs interface for the POWER8 On-Chip Controller, + exposing temperature, frequency and power measurements. + + This driver can also be built as a module. If so, the module will be + called p8-occ-i2c. + +endif diff --git a/drivers/hwmon/occ/Makefile b/drivers/hwmon/occ/Makefile index a6881f9..9294b58 100644 --- a/drivers/hwmon/occ/Makefile +++ b/drivers/hwmon/occ/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_SENSORS_PPC_OCC) += occ.o occ_sysfs.o +obj-$(CONFIG_SENSORS_PPC_OCC_P8_I2C) += occ_scom_i2c.o occ_p8.o p8_occ_i2c.o diff --git a/drivers/hwmon/occ/p8_occ_i2c.c b/drivers/hwmon/occ/p8_occ_i2c.c new file mode 100644 index 0000000..6273040 --- /dev/null +++ b/drivers/hwmon/occ/p8_occ_i2c.c @@ -0,0 +1,104 @@ +/* + * p8_occ_i2c.c - hwmon OCC driver + * + * This file contains the i2c layer for accessing the P8 OCC over i2c bus. + * + * Copyright 2016 IBM Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "occ_p8.h" +#include "occ_scom_i2c.h" +#include "occ_sysfs.h" +#include "scom.h" + +#define P8_OCC_I2C_NAME "p8-occ-i2c" + +int p8_i2c_getscom(void *bus, u32 address, u64 *data) +{ + /* P8 i2c slave requires address to be shifted by 1 */ + address = address << 1; + + return occ_i2c_getscom(bus, address, data); +} + +int p8_i2c_putscom(void *bus, u32 address, u32 data0, u32 data1) +{ + /* P8 i2c slave requires address to be shifted by 1 */ + address = address << 1; + + return occ_i2c_putscom(bus, address, data0, data1); +} + +static struct occ_bus_ops p8_bus_ops = { + .getscom = p8_i2c_getscom, + .putscom = p8_i2c_putscom, +}; + +static int p8_occ_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct occ *occ; + struct occ_sysfs *hwmon; + const u32 *sensor_hwmon_configs = p8_get_sensor_hwmon_configs(); + + occ = p8_occ_start(&client->dev, client, &p8_bus_ops); + if (IS_ERR(occ)) + return PTR_ERR(occ); + + hwmon = occ_sysfs_start(&client->dev, occ, sensor_hwmon_configs, + P8_OCC_I2C_NAME); + if (IS_ERR(hwmon)) + return PTR_ERR(hwmon); + + i2c_set_clientdata(client, occ); + + return 0; +} + +/* used by old-style board info. */ +static const struct i2c_device_id occ_ids[] = { + { P8_OCC_I2C_NAME, 0 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, occ_ids); + +/* used by device table */ +static const struct of_device_id occ_of_match[] = { + { .compatible = "ibm,p8-occ-i2c" }, + {} +}; +MODULE_DEVICE_TABLE(of, occ_of_match); + +static struct i2c_driver p8_occ_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = P8_OCC_I2C_NAME, + .of_match_table = occ_of_match, + }, + .probe = p8_occ_probe, + .id_table = occ_ids, +}; + +module_i2c_driver(p8_occ_driver); + +MODULE_AUTHOR("Eddie James "); +MODULE_DESCRIPTION("BMC P8 OCC hwmon driver"); +MODULE_LICENSE("GPL");