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Tue, 9 Aug 2022 20:07:12 +0000 (GMT) From: Eddie James To: joel@jms.id.au Subject: [PATCH v2 1/3] dt-bindings: hwmon: Add IBM OCC bindings Date: Tue, 9 Aug 2022 15:06:59 -0500 Message-Id: <20220809200701.218059-2-eajames@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220809200701.218059-1-eajames@linux.ibm.com> References: <20220809200701.218059-1-eajames@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 7k7xmxygFo53fE2t1fKSqeuleecCKN6Q X-Proofpoint-GUID: 7k7xmxygFo53fE2t1fKSqeuleecCKN6Q X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-09_05,2022-08-09_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 clxscore=1015 phishscore=0 adultscore=0 suspectscore=0 spamscore=0 impostorscore=0 mlxlogscore=999 malwarescore=0 priorityscore=1501 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208090074 X-BeenThere: linux-fsi@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, jdelvare@suse.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-fsi@lists.ozlabs.org Errors-To: linux-fsi-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "linux-fsi" These bindings describe the POWER processor On Chip Controller accessed from a service processor or baseboard management controller (BMC). Signed-off-by: Eddie James --- .../bindings/hwmon/ibm,occ-hwmon.yaml | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/ibm,occ-hwmon.yaml diff --git a/Documentation/devicetree/bindings/hwmon/ibm,occ-hwmon.yaml b/Documentation/devicetree/bindings/hwmon/ibm,occ-hwmon.yaml new file mode 100644 index 000000000000..3dbdc5af2804 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/ibm,occ-hwmon.yaml @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwmon/ibm,occ-hwmon.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: IBM On-Chip Controller (OCC) accessed from a service processor + +maintainers: + - Eddie James + +description: | + The POWER processor On-Chip Controller (OCC) helps manage power and + thermals for the system. A service processor or baseboard management + controller can query the OCC for it's power and thermal data to report + through hwmon. + +properties: + compatible: + enum: + - ibm,p9-occ-hwmon + - ibm,p10-occ-hwmon + + ibm,no-poll-on-init: + description: This property describes whether or not the OCC should + be polled during driver initialization. + type: boolean + +required: + - compatible + +additionalProperties: false + +examples: + - | + hwmon { + compatible = "ibm,p10-occ-hwmon"; + ibm,no-poll-on-init; + }; From patchwork Tue Aug 9 20:07:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 1665046 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=q357ZGuN; 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Tue, 09 Aug 2022 20:07:17 +0000 Received: from b01ledav006.gho.pok.ibm.com (b01ledav006.gho.pok.ibm.com [9.57.199.111]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 279K7Gud55968186 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 9 Aug 2022 20:07:16 GMT Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B5252AC05B; Tue, 9 Aug 2022 20:07:16 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EC1A8AC059; Tue, 9 Aug 2022 20:07:15 +0000 (GMT) Received: from slate16.aus.stglabs.ibm.com (unknown [9.160.17.179]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 9 Aug 2022 20:07:15 +0000 (GMT) From: Eddie James To: joel@jms.id.au Subject: [PATCH v2 2/3] fsi: occ: Support probing the hwmon child device from dts node Date: Tue, 9 Aug 2022 15:07:00 -0500 Message-Id: <20220809200701.218059-3-eajames@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220809200701.218059-1-eajames@linux.ibm.com> References: <20220809200701.218059-1-eajames@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: aGIZUkQvzfO8N_51XEKghxCbmP8tw87b X-Proofpoint-GUID: aGIZUkQvzfO8N_51XEKghxCbmP8tw87b X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-09_05,2022-08-09_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 phishscore=0 mlxlogscore=935 mlxscore=0 priorityscore=1501 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208090074 X-BeenThere: linux-fsi@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, jdelvare@suse.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-fsi@lists.ozlabs.org Errors-To: linux-fsi-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "linux-fsi" There is now a need for reading devicetree properties in the OCC hwmon driver, which isn't current supported as the FSI driver just instantiates a basic platform device. Add support for this use case by checking for an "occ-hwmon" node and if present, creating an OF device from it. Signed-off-by: Eddie James --- drivers/fsi/fsi-occ.c | 41 ++++++++++++++++++++++++++++++++++------- 1 file changed, 34 insertions(+), 7 deletions(-) diff --git a/drivers/fsi/fsi-occ.c b/drivers/fsi/fsi-occ.c index 8f7f602b909d..abdd37d5507f 100644 --- a/drivers/fsi/fsi-occ.c +++ b/drivers/fsi/fsi-occ.c @@ -44,6 +44,7 @@ struct occ { struct device *sbefifo; char name[32]; int idx; + bool platform_hwmon; u8 sequence_number; void *buffer; void *client_buffer; @@ -598,7 +599,7 @@ int fsi_occ_submit(struct device *dev, const void *request, size_t req_len, } EXPORT_SYMBOL_GPL(fsi_occ_submit); -static int occ_unregister_child(struct device *dev, void *data) +static int occ_unregister_platform_child(struct device *dev, void *data) { struct platform_device *hwmon_dev = to_platform_device(dev); @@ -607,12 +608,25 @@ static int occ_unregister_child(struct device *dev, void *data) return 0; } +static int occ_unregister_of_child(struct device *dev, void *data) +{ + struct platform_device *hwmon_dev = to_platform_device(dev); + + of_device_unregister(hwmon_dev); + if (dev->of_node) + of_node_clear_flag(dev->of_node, OF_POPULATED); + + return 0; +} + static int occ_probe(struct platform_device *pdev) { int rc; u32 reg; + char child_name[32]; struct occ *occ; - struct platform_device *hwmon_dev; + struct platform_device *hwmon_dev = NULL; + struct device_node *hwmon_node; struct device *dev = &pdev->dev; struct platform_device_info hwmon_dev_info = { .parent = dev, @@ -671,10 +685,20 @@ static int occ_probe(struct platform_device *pdev) return rc; } - hwmon_dev_info.id = occ->idx; - hwmon_dev = platform_device_register_full(&hwmon_dev_info); - if (IS_ERR(hwmon_dev)) - dev_warn(dev, "failed to create hwmon device\n"); + hwmon_node = of_get_child_by_name(dev->of_node, hwmon_dev_info.name); + if (hwmon_node) { + snprintf(child_name, sizeof(child_name), "%s.%d", hwmon_dev_info.name, occ->idx); + hwmon_dev = of_platform_device_create(hwmon_node, child_name, dev); + of_node_put(hwmon_node); + } + + if (!hwmon_dev) { + occ->platform_hwmon = true; + hwmon_dev_info.id = occ->idx; + hwmon_dev = platform_device_register_full(&hwmon_dev_info); + if (IS_ERR(hwmon_dev)) + dev_warn(dev, "failed to create hwmon device\n"); + } return 0; } @@ -690,7 +714,10 @@ static int occ_remove(struct platform_device *pdev) occ->buffer = NULL; mutex_unlock(&occ->occ_lock); - device_for_each_child(&pdev->dev, NULL, occ_unregister_child); + if (occ->platform_hwmon) + device_for_each_child(&pdev->dev, NULL, occ_unregister_platform_child); + else + device_for_each_child(&pdev->dev, NULL, occ_unregister_of_child); ida_simple_remove(&occ_ida, occ->idx); From patchwork Tue Aug 9 20:07:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 1665044 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=qvtKaP/c; 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Tue, 09 Aug 2022 20:07:19 +0000 Received: from b01ledav006.gho.pok.ibm.com (b01ledav006.gho.pok.ibm.com [9.57.199.111]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 279K7Jag1245764 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 9 Aug 2022 20:07:19 GMT Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1F87DAC059; Tue, 9 Aug 2022 20:07:19 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 58F78AC05F; Tue, 9 Aug 2022 20:07:18 +0000 (GMT) Received: from slate16.aus.stglabs.ibm.com (unknown [9.160.17.179]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 9 Aug 2022 20:07:18 +0000 (GMT) From: Eddie James To: joel@jms.id.au Subject: [PATCH v2 3/3] hwmon: (occ) Check for device property for setting OCC active during probe Date: Tue, 9 Aug 2022 15:07:01 -0500 Message-Id: <20220809200701.218059-4-eajames@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220809200701.218059-1-eajames@linux.ibm.com> References: <20220809200701.218059-1-eajames@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: qL4cxvaRSWOQ-5avp_t9giHqrB95UmkF X-Proofpoint-ORIG-GUID: qL4cxvaRSWOQ-5avp_t9giHqrB95UmkF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-09_05,2022-08-09_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 malwarescore=0 priorityscore=1501 mlxscore=0 impostorscore=0 phishscore=0 bulkscore=0 spamscore=0 mlxlogscore=999 clxscore=1015 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208090074 X-BeenThere: linux-fsi@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, jdelvare@suse.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-fsi@lists.ozlabs.org Errors-To: linux-fsi-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "linux-fsi" A previous commit changed the existing behavior of the driver to skip attempting to communicate with the OCC during probe. Return to the previous default behavior of automatically communicating with the OCC and make it optional with a new device-tree property. Signed-off-by: Eddie James Acked-by: Guenter Roeck --- drivers/hwmon/occ/common.c | 11 ++++++++++- drivers/hwmon/occ/p9_sbe.c | 9 +++++++++ 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/occ/common.c b/drivers/hwmon/occ/common.c index 45407b12db4b..dd690f700d49 100644 --- a/drivers/hwmon/occ/common.c +++ b/drivers/hwmon/occ/common.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include @@ -1216,8 +1217,16 @@ int occ_setup(struct occ *occ) occ->groups[0] = &occ->group; rc = occ_setup_sysfs(occ); - if (rc) + if (rc) { dev_err(occ->bus_dev, "failed to setup sysfs: %d\n", rc); + return rc; + } + + if (!device_property_read_bool(occ->bus_dev, "ibm,no-poll-on-init")) { + rc = occ_active(occ, true); + if (rc) + occ_shutdown_sysfs(occ); + } return rc; } diff --git a/drivers/hwmon/occ/p9_sbe.c b/drivers/hwmon/occ/p9_sbe.c index 4a1fe4ee8e2c..3adcf8d0b4a6 100644 --- a/drivers/hwmon/occ/p9_sbe.c +++ b/drivers/hwmon/occ/p9_sbe.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -179,9 +180,17 @@ static int p9_sbe_occ_remove(struct platform_device *pdev) return 0; } +static const struct of_device_id p9_sbe_occ_of_match[] = { + { .compatible = "ibm,p9-occ-hwmon" }, + { .compatible = "ibm,p10-occ-hwmon" }, + {} +}; +MODULE_DEVICE_TABLE(of, p9_sbe_occ_of_match); + static struct platform_driver p9_sbe_occ_driver = { .driver = { .name = "occ-hwmon", + .of_match_table = p9_sbe_occ_of_match, }, .probe = p9_sbe_occ_probe, .remove = p9_sbe_occ_remove,