From patchwork Thu Nov 23 01:54:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Delphine CC Chiu X-Patchwork-Id: 13465690 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=wiwynn.com header.i=@wiwynn.com header.b="CtyGJufV" Received: from APC01-PSA-obe.outbound.protection.outlook.com (mail-psaapc01on2075.outbound.protection.outlook.com [40.107.255.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A87F01AB; Wed, 22 Nov 2023 17:54:54 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=RdxLFy6fvGslehE/iVrEoi1XWgtX4Qv2QOtIxTZ1xVGvz/SF5cT4zwshgkgOriM+f1pyzkjldOYE3o3+LEPS4txgvnK2Kh9v2E3EEfxe0OMZ6caEchvtyW/UmcaVPOZA4pEonPI25UzTa4YPwT7vyubJnmtWpmrLfBDp4wVvt3K0VoDWVAy9uTmRLfPHgTUpW+3M6/q0ZZ3j8wMk297HAxKplpBK/h6F9Dk0wkFEiCsPvd4GsSVPy6lG32Qo69R7pFfsHzE3rIHCpGGTf0DoVRcAAk+/B90G3UD3j/HR9Usr0zOyqX2yoSi5MtTxqwoUp3xEfGMexvLJJGH7QlVfAg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=mZix0rEbbh1WtDrMkthy/ANtdcZ7vmzbMchCQqM/tLs=; b=LOI4WYCG5vBjvm1q9Cx06rVh5ETOppytSo/bGzLM/E309mo5sbKQ4SJw40KQSkpOdtmw6mdOMA5CQn1TQdpIm8Kpsm84bapVMoCHQAE7vOLsFDCjgjqSJmWKBJ34RHrRAteyCDj6FJc9CM7Lcx90YY0zTo137LsycMlPln+4r5l3xVjZU4oLeHCNVH7vvKJGsDS/CIqRmHYqvQ1ECwFj9iBPFHqzGyaUSwcblUmCXMeVl8CtcObx7XXZn/AV3G+/aFGPCQwqOI1wM7g/O+EKFAQD+AJ0GFHWKS8UDC7/8MkU/HbNcpPJMKLET6c1rt6q8+QjRSOUZX+gcYj1LdriCw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=fail (sender ip is 211.20.1.79) smtp.rcpttodomain=stwcx.xyz smtp.mailfrom=wiwynn.com; dmarc=fail (p=quarantine sp=quarantine pct=100) action=quarantine header.from=wiwynn.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wiwynn.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=mZix0rEbbh1WtDrMkthy/ANtdcZ7vmzbMchCQqM/tLs=; b=CtyGJufVNY5NXfP/Zo+m8/EmWK8u9CJ0aWAemwVmx2AIeBBv7BhVmcsIquqwgU/aoZj05aggnRNKf3mU41FPFmwXlbxIQzcUFvBcin/CfguWYH8SbeCdYOnQC9CdPP6mm4TjBTWFAxvHQt0h8BhBaP41TAU3cTfeJxRcMZ9nQVWWnUQmWHki35lZdx3Ll1dV5+n1uzS4iF4zCZNRTZG7uWyXA8A/PD+aA9uhgNAmFBN5O9qDz4Ki0CLmfgd1DFWVVOOQBPLw/WnVAncse9r3t0vJzPIncu0aG5EzpY42901USj/fPCo1v69Ko+7j3MtISTwQ96WLPAV2cbbxVlRNSA== Received: from SG2PR02CA0003.apcprd02.prod.outlook.com (2603:1096:3:17::15) by PUZPR04MB6536.apcprd04.prod.outlook.com (2603:1096:301:f3::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7025.18; Thu, 23 Nov 2023 01:54:50 +0000 Received: from SG1PEPF000082E7.apcprd02.prod.outlook.com (2603:1096:3:17:cafe::74) by SG2PR02CA0003.outlook.office365.com (2603:1096:3:17::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7025.20 via Frontend Transport; Thu, 23 Nov 2023 01:54:50 +0000 X-MS-Exchange-Authentication-Results: spf=fail (sender IP is 211.20.1.79) smtp.mailfrom=Wiwynn.com; dkim=none (message not signed) header.d=none;dmarc=fail action=quarantine header.from=Wiwynn.com; Received-SPF: Fail (protection.outlook.com: domain of Wiwynn.com does not designate 211.20.1.79 as permitted sender) receiver=protection.outlook.com; client-ip=211.20.1.79; helo=localhost.localdomain; Received: from localhost.localdomain (211.20.1.79) by SG1PEPF000082E7.mail.protection.outlook.com (10.167.240.10) with Microsoft SMTP Server id 15.20.7025.12 via Frontend Transport; Thu, 23 Nov 2023 01:54:49 +0000 From: Delphine CC Chiu To: patrick@stwcx.xyz, Delphine CC Chiu , Jean Delvare , Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Conor Dooley , Jonathan Corbet , linux-i2c@vger.kernel.org, linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v7 1/2] dt-bindings: hwmon: Add lltc ltc4286 driver bindings Date: Thu, 23 Nov 2023 09:54:36 +0800 Message-Id: <20231123015440.199822-2-Delphine_CC_Chiu@Wiwynn.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231123015440.199822-1-Delphine_CC_Chiu@Wiwynn.com> References: <20231123015440.199822-1-Delphine_CC_Chiu@Wiwynn.com> Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SG1PEPF000082E7:EE_|PUZPR04MB6536:EE_ X-MS-Office365-Filtering-Correlation-Id: 2186950f-cab4-45bb-b9f7-08dbebc72dba X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:211.20.1.79;CTRY:TW;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:localhost.localdomain;PTR:211-20-1-79.hinet-ip.hinet.net;CAT:NONE;SFS:(13230031)(6069001)(4636009)(346002)(376002)(39860400002)(136003)(396003)(230922051799003)(186009)(1800799012)(64100799003)(82310400011)(451199024)(46966006)(36840700001)(356005)(6506007)(82740400003)(81166007)(26005)(6512007)(9316004)(47076005)(8676002)(54906003)(70586007)(36860700001)(110136005)(70206006)(4326008)(36736006)(316002)(40480700001)(1076003)(336012)(966005)(2616005)(956004)(478600001)(6486002)(83380400001)(6666004)(8936002)(7416002)(5660300002)(2906002)(41300700001)(86362001)(36756003);DIR:OUT;SFP:1101; X-OriginatorOrg: wiwynn.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Nov 2023 01:54:49.1913 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2186950f-cab4-45bb-b9f7-08dbebc72dba X-MS-Exchange-CrossTenant-Id: da6e0628-fc83-4caf-9dd2-73061cbab167 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=da6e0628-fc83-4caf-9dd2-73061cbab167;Ip=[211.20.1.79];Helo=[localhost.localdomain] X-MS-Exchange-CrossTenant-AuthSource: SG1PEPF000082E7.apcprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PUZPR04MB6536 Add a device tree bindings for ltc4286 device. Signed-off-by: Delphine CC Chiu Reviewed-by: Conor Dooley --- Changelog: v6 - Add "---" under "Changelog" in commit message - Remove "shunt-resistor-micro-ohms" from required v5 - Add hyphen under "Changelog" in commit message v4 - Revise some inappropriate writing in yaml file v3 - Revise adi,vrange-select-25p6 to adi,vrange-low-enable v2 - Revise vrange_select_25p6 to adi,vrange-select-25p6 - Add type for adi,vrange-select-25p6 - Revise rsense-micro-ohms to shunt-resistor-micro-ohms --- .../bindings/hwmon/lltc,ltc4286.yaml | 50 +++++++++++++++++++ MAINTAINERS | 10 ++++ 2 files changed, 60 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml diff --git a/Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml b/Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml new file mode 100644 index 000000000000..98ca163d3486 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml @@ -0,0 +1,50 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwmon/lltc,ltc4286.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: LTC4286 power monitors + +maintainers: + - Delphine CC Chiu + +properties: + compatible: + enum: + - lltc,ltc4286 + - lltc,ltc4287 + + reg: + maxItems: 1 + + adi,vrange-low-enable: + description: + This property is a bool parameter to represent the + voltage range is 25.6 volts or 102.4 volts for this chip. + The default is 102.4 volts. + type: boolean + + shunt-resistor-micro-ohms: + description: + Resistor value micro-ohms. + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + power-monitor@40 { + compatible = "lltc,ltc4286"; + reg = <0x40>; + adi,vrange-low-enable; + shunt-resistor-micro-ohms = <300>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 0e79e24b6c96..33f005319c79 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12628,6 +12628,16 @@ S: Maintained F: Documentation/hwmon/ltc4261.rst F: drivers/hwmon/ltc4261.c +LTC4286 HARDWARE MONITOR DRIVER +M: Delphine CC Chiu +L: linux-i2c@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml +F: Documentation/devicetree/bindings/hwmon/ltc4286.rst +F: drivers/hwmon/pmbus/Kconfig +F: drivers/hwmon/pmbus/Makefile +F: drivers/hwmon/pmbus/ltc4286.c + LTC4306 I2C MULTIPLEXER DRIVER M: Michael Hennerich L: linux-i2c@vger.kernel.org From patchwork Thu Nov 23 01:54:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Delphine CC Chiu X-Patchwork-Id: 13465691 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=wiwynn.com header.i=@wiwynn.com header.b="irgZQpRQ" Received: from APC01-PSA-obe.outbound.protection.outlook.com (mail-psaapc01on2069.outbound.protection.outlook.com [40.107.255.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 58252D56; Wed, 22 Nov 2023 17:55:00 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=B9X5YbkkLCjjp1X00G9FJqt9cGa1Tcjf90EUo8+cNPQLtDHtVHHsO31BQPnx+EkC/C4s8URh+YgGOaQHvH9vjZoyNENHR3f9gsKhEfYvM8N+ArVtijmKtp2knwvGBO6j0qGyRfJ2+vU3VOQPTwD0kppQa7tT+of/zLDQWpCNUMgsluohvug3JoAEdPAxqsc5hYuTKa6KYhV0tQ8z1lxob/TtjWPasm73Ag38P0IYGLMfgyTRKo6bOTuPBJYEf75ZlhOSeYTqp7Tq4yhBPjak1x9u6wdakImiC5AWWbPrOiclGt+M9bFv75wYtUAMAb4kh5LGrHpgbNgN/vwto0fGGQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Gtp+egWvpC3LFbem15ChKiN9/KynGDIQMpOC1tKE6JI=; b=ZKv4nZ5ZcKFE5iNeYDV+c39dLjHbsS60sUs16a67ZwGR/hc/qleZ7v/7iraRQlJh6vQoqaGVpscsUC4gUjoPxQ9e/kNuvz0SH66dXuQ5V8uBYNcfmLmAQJsei2yqPol4mNRg2SD/rxosr7yNKxubM+kvCsBpyNWwpN/5EQ0diaTDH/SeznxVqOMjaO4yr7eYs0VkdxGmgj/zOnWT0jvEfT4OVJZFvdGXBno1EpElWr9o+jEs/9xXW1tG/XDlUtI9A8jYJ3WTcpB4E+ecqkDbAJ1YRpnUAdXhiVYllX0yjSfkijKxEPb/sdS3GUHotLNvNkNe+Gva572t2Ur00zNHIw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=fail (sender ip is 211.20.1.79) smtp.rcpttodomain=stwcx.xyz smtp.mailfrom=wiwynn.com; dmarc=fail (p=quarantine sp=quarantine pct=100) action=quarantine header.from=wiwynn.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wiwynn.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Gtp+egWvpC3LFbem15ChKiN9/KynGDIQMpOC1tKE6JI=; b=irgZQpRQM57lpr9sov+LrCqzsV7qBq98Kjo7Q9YVacY1zz681cnJUMAkK7AVXJJyO/JQC2QlRQHbt/jxUmcaVdg22AItoq3xPN2j8N2UgLJi+tss9YHmY3TWo/pVgsxrxPkvcE9ecVkYa5zcwkAtWchOY8JhB0gJXIq63s5tC/i/BMeOrHcfByy+5kSnYa4QO7fG35tfdr7wqx8dZnsy44BlGG9UjAPefQhRrR5mDUs4dKL2wceUBh5ZRkc6KFzwV7NVcFLpK6w0NQHtUPNT9RPWaOAxnjX6Swkgw2PuY3S8idyzW+s2TLYtTDv8ABT7XDgaocYsXlnHxiLLFqNoyg== Received: from SG2PR02CA0016.apcprd02.prod.outlook.com (2603:1096:3:17::28) by TYZPR04MB6834.apcprd04.prod.outlook.com (2603:1096:400:340::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7025.18; Thu, 23 Nov 2023 01:54:56 +0000 Received: from SG1PEPF000082E7.apcprd02.prod.outlook.com (2603:1096:3:17:cafe::85) by SG2PR02CA0016.outlook.office365.com (2603:1096:3:17::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7025.20 via Frontend Transport; Thu, 23 Nov 2023 01:54:56 +0000 X-MS-Exchange-Authentication-Results: spf=fail (sender IP is 211.20.1.79) smtp.mailfrom=Wiwynn.com; dkim=none (message not signed) header.d=none;dmarc=fail action=quarantine header.from=Wiwynn.com; Received-SPF: Fail (protection.outlook.com: domain of Wiwynn.com does not designate 211.20.1.79 as permitted sender) receiver=protection.outlook.com; client-ip=211.20.1.79; helo=localhost.localdomain; Received: from localhost.localdomain (211.20.1.79) by SG1PEPF000082E7.mail.protection.outlook.com (10.167.240.10) with Microsoft SMTP Server id 15.20.7025.12 via Frontend Transport; Thu, 23 Nov 2023 01:54:55 +0000 From: Delphine CC Chiu To: patrick@stwcx.xyz, Jean Delvare , Guenter Roeck , Jonathan Corbet , Delphine CC Chiu Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-i2c@vger.kernel.org, linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v7 2/2] hwmon: pmbus: Add ltc4286 driver Date: Thu, 23 Nov 2023 09:54:37 +0800 Message-Id: <20231123015440.199822-3-Delphine_CC_Chiu@Wiwynn.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231123015440.199822-1-Delphine_CC_Chiu@Wiwynn.com> References: <20231123015440.199822-1-Delphine_CC_Chiu@Wiwynn.com> Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SG1PEPF000082E7:EE_|TYZPR04MB6834:EE_ X-MS-Office365-Filtering-Correlation-Id: 94d72fe7-205b-441a-3144-08dbebc7313b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:211.20.1.79;CTRY:TW;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:localhost.localdomain;PTR:211-20-1-79.hinet-ip.hinet.net;CAT:NONE;SFS:(13230031)(6069001)(4636009)(396003)(39850400004)(136003)(346002)(376002)(230922051799003)(186009)(82310400011)(1800799012)(64100799003)(451199024)(46966006)(36840700001)(5660300002)(26005)(336012)(47076005)(2616005)(956004)(1076003)(86362001)(83380400001)(36860700001)(7416002)(2906002)(8936002)(110136005)(8676002)(40480700001)(30864003)(36756003)(41300700001)(82740400003)(7049001)(66574015)(6666004)(6512007)(6506007)(6486002)(478600001)(966005)(70586007)(4326008)(9316004)(70206006)(356005)(54906003)(36736006)(81166007)(316002);DIR:OUT;SFP:1101; X-OriginatorOrg: wiwynn.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Nov 2023 01:54:55.1132 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 94d72fe7-205b-441a-3144-08dbebc7313b X-MS-Exchange-CrossTenant-Id: da6e0628-fc83-4caf-9dd2-73061cbab167 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=da6e0628-fc83-4caf-9dd2-73061cbab167;Ip=[211.20.1.79];Helo=[localhost.localdomain] X-MS-Exchange-CrossTenant-AuthSource: SG1PEPF000082E7.apcprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYZPR04MB6834 Add a driver to support ltc4286 chip Signed-off-by: Delphine CC Chiu --- Changelog: v7 - Check VRANGE_SELECT bit instead of entire register v6 - Check VRANGE_SELECT before driver loading v5 - Check the overflow when reading rsense - Set default rsense value v4 - Add empty line before "config SENSORS_LTC4286" in Kconfig - Add ltc4286 to Documentation/hwmon/index.rst - Revise comment typo - Use devm_kmemdup instead of memcpy - Check MBR value before writting into v3 - Use dev_err_probe() instead of dev_err() - The VRANGE_SELECT bit only be written if it actually changed - Avoid the info pointer being overwritten - Check the MBR value range to avoid overflow - Revise ltc4286.rst to corrcet description v2 - Revise Linear Technologies LTC4286 to Analog Devices LTC4286 in Kconfig - Add more description for this driver in Kconfig - Add some comments for MBR setting in ltc4286.c - Add ltc4286.rst --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/ltc4286.rst | 95 +++++++++++++++++ drivers/hwmon/pmbus/Kconfig | 10 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/ltc4286.c | 176 ++++++++++++++++++++++++++++++++ 5 files changed, 283 insertions(+) create mode 100644 Documentation/hwmon/ltc4286.rst create mode 100644 drivers/hwmon/pmbus/ltc4286.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 72f4e6065bae..080827cc4c34 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -128,6 +128,7 @@ Hardware Monitoring Kernel Drivers ltc4245 ltc4260 ltc4261 + ltc4286 max127 max15301 max16064 diff --git a/Documentation/hwmon/ltc4286.rst b/Documentation/hwmon/ltc4286.rst new file mode 100644 index 000000000000..2cd149676d86 --- /dev/null +++ b/Documentation/hwmon/ltc4286.rst @@ -0,0 +1,95 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver ltc4286 +===================== + +Supported chips: + + * Analog Devices LTC4286 + + Prefix: 'ltc4286' + + Addresses scanned: - + + Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ltc4286.pdf + + * Analog Devices LTC4287 + + Prefix: 'ltc4287' + + Addresses scanned: - + + Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ltc4287.pdf + +Author: Delphine CC Chiu + + +Description +----------- + +This driver supports hardware monitoring for Analog Devices LTC4286 +and LTC4287 Hot-Swap Controller and Digital Power Monitors. + +LTC4286 and LTC4287 are hot-swap controllers that allow a circuit board +to be removed from or inserted into a live backplane. They also feature +current and voltage readback via an integrated 12 bit analog-to-digital +converter (ADC), accessed using a PMBus interface. + +The driver is a client driver to the core PMBus driver. Please see +Documentation/hwmon/pmbus.rst for details on PMBus client drivers. + + +Usage Notes +----------- + +This driver does not auto-detect devices. You will have to instantiate the +devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for +details. + +The shunt value in micro-ohms can be set via device tree at compile-time. Please +refer to the Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml for bindings +if the device tree is used. + + +Platform data support +--------------------- + +The driver supports standard PMBus driver platform data. Please see +Documentation/hwmon/pmbus.rst for details. + + +Sysfs entries +------------- + +The following attributes are supported. Limits are read-write, history reset +attributes are write-only, all other attributes are read-only. + +======================= ======================================================= +in1_label "vin" +in1_input Measured voltage. +in1_alarm Input voltage alarm. +in1_min Minimum input voltage. +in1_max Maximum input voltage. + +in2_label "vout1" +in2_input Measured voltage. +in2_alarm Output voltage alarm. +in2_min Minimum output voltage. +in2_max Maximum output voltage. + +curr1_label "iout1" +curr1_input Measured current. +curr1_alarm Output current alarm. +curr1_max Maximum current. + +power1_label "pin" +power1_input Input power. +power1_alarm Input power alarm. +power1_max Maximum poewr. + +temp1_input Chip temperature. +temp1_min Minimum chip temperature. +temp1_max Maximum chip temperature. +temp1_crit Critical chip temperature. +temp1_alarm Chip temperature alarm. +======================= ======================================================= diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index b4e93bd5835e..2d4f972e5a65 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -227,6 +227,16 @@ config SENSORS_LTC3815 This driver can also be built as a module. If so, the module will be called ltc3815. +config SENSORS_LTC4286 + bool "Analog Devices LTC4286" + help + LTC4286 is an integrated solution for hot swap applications that + allows a board to be safely inserted and removed from a live + backplane. + This chip could be used to monitor voltage, current, ...etc. + If you say yes here you get hardware monitoring support for Analog + Devices LTC4286. + config SENSORS_MAX15301 tristate "Maxim MAX15301" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index 84ee960a6c2d..94e28f6d6a61 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_SENSORS_LM25066) += lm25066.o obj-$(CONFIG_SENSORS_LT7182S) += lt7182s.o obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o obj-$(CONFIG_SENSORS_LTC3815) += ltc3815.o +obj-$(CONFIG_SENSORS_LTC4286) += ltc4286.o obj-$(CONFIG_SENSORS_MAX15301) += max15301.o obj-$(CONFIG_SENSORS_MAX16064) += max16064.o obj-$(CONFIG_SENSORS_MAX16601) += max16601.o diff --git a/drivers/hwmon/pmbus/ltc4286.c b/drivers/hwmon/pmbus/ltc4286.c new file mode 100644 index 000000000000..5c122d5d0f7d --- /dev/null +++ b/drivers/hwmon/pmbus/ltc4286.c @@ -0,0 +1,176 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include +#include +#include +#include +#include "pmbus.h" + +/* LTC4286 register */ +#define LTC4286_MFR_CONFIG1 0xF2 + +/* LTC4286 configuration */ +#define VRANGE_SELECT_BIT BIT(1) + +#define LTC4286_MFR_ID_SIZE 3 + +/* + * Initialize the MBR as default settings which is referred to LTC4286 datasheet + * (March 22, 2022 version) table 3 page 16 + */ +static struct pmbus_driver_info ltc4286_info = { + .pages = 1, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_POWER] = direct, + .format[PSC_TEMPERATURE] = direct, + .m[PSC_VOLTAGE_IN] = 32, + .b[PSC_VOLTAGE_IN] = 0, + .R[PSC_VOLTAGE_IN] = 1, + .m[PSC_VOLTAGE_OUT] = 32, + .b[PSC_VOLTAGE_OUT] = 0, + .R[PSC_VOLTAGE_OUT] = 1, + .m[PSC_CURRENT_OUT] = 1024, + .b[PSC_CURRENT_OUT] = 0, + /* + * The rsense value used in MBR formula in LTC4286 datasheet should be ohm unit. + * However, the rsense value that user input is micro ohm. + * Thus, the MBR setting which involves rsense should be shifted by 6 digits. + */ + .R[PSC_CURRENT_OUT] = 3 - 6, + .m[PSC_POWER] = 1, + .b[PSC_POWER] = 0, + /* + * The rsense value used in MBR formula in LTC4286 datasheet should be ohm unit. + * However, the rsense value that user input is micro ohm. + * Thus, the MBR setting which involves rsense should be shifted by 6 digits. + */ + .R[PSC_POWER] = 4 - 6, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 273, + .R[PSC_TEMPERATURE] = 0, + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | + PMBUS_HAVE_PIN | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_VOUT | + PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_TEMP, +}; + +static const struct i2c_device_id ltc4286_id[] = { + { "ltc4286", 0 }, + { "ltc4287", 1 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, ltc4286_id); + +static int ltc4286_probe(struct i2c_client *client) +{ + int ret; + const struct i2c_device_id *mid; + u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; + struct pmbus_driver_info *info; + u32 rsense; + int vrange_nval, vrange_oval; + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); + if (ret < 0) { + return dev_err_probe(&client->dev, ret, + "Failed to read manufacturer id\n"); + } + + /* + * Refer to ltc4286 datasheet page 20 + * the manufacturer id is LTC + */ + if (ret != LTC4286_MFR_ID_SIZE || + strncmp(block_buffer, "LTC", LTC4286_MFR_ID_SIZE)) { + return dev_err_probe(&client->dev, ret, + "Manufacturer id mismatch\n"); + } + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); + if (ret < 0) { + return dev_err_probe(&client->dev, ret, + "Failed to read manufacturer model\n"); + } + + for (mid = ltc4286_id; mid->name[0]; mid++) { + if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) + break; + } + if (!mid->name[0]) + return dev_err_probe(&client->dev, -ENODEV, + "Unsupported device\n"); + + if (of_property_read_u32(client->dev.of_node, + "shunt-resistor-micro-ohms", &rsense)) + rsense = 300; /* 0.3 mOhm if not set via DT */ + + if (rsense == 0) + return -EINVAL; + + /* Check for the latter MBR value won't overflow */ + if (rsense > (INT_MAX / 1024)) + return -EINVAL; + + info = devm_kmemdup(&client->dev, <c4286_info, sizeof(*info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + /* Check MFR1 CONFIG register bit 1 VRANGE_SELECT before driver loading */ + vrange_oval = i2c_smbus_read_word_data(client, LTC4286_MFR_CONFIG1); + if (vrange_oval < 0) + return dev_err_probe( + &client->dev, vrange_oval, + "Failed to read manufacturer configuration one\n"); + vrange_nval = vrange_oval; + + if (device_property_read_bool(&client->dev, "adi,vrange-low-enable")) { + vrange_nval &= + ~VRANGE_SELECT_BIT; /* VRANGE_SELECT = 0, 25.6 volts */ + + info->m[PSC_VOLTAGE_IN] = 128; + info->m[PSC_VOLTAGE_OUT] = 128; + info->m[PSC_POWER] = 4 * rsense; + } else { + vrange_nval |= + VRANGE_SELECT_BIT; /* VRANGE_SELECT = 1, 102.4 volts */ + + info->m[PSC_POWER] = rsense; + } + if (vrange_nval != vrange_oval) { + /* Set MFR1 CONFIG register bit 1 VRANGE_SELECT */ + ret = i2c_smbus_write_word_data(client, LTC4286_MFR_CONFIG1, + vrange_nval); + if (ret < 0) + return dev_err_probe(&client->dev, ret, + "Failed to set vrange\n"); + } + + info->m[PSC_CURRENT_OUT] = 1024 * rsense; + + return pmbus_do_probe(client, info); +} + +static const struct of_device_id ltc4286_of_match[] = { + { .compatible = "lltc,ltc4286" }, + { .compatible = "lltc,ltc4287" }, + {} +}; + +static struct i2c_driver ltc4286_driver = { + .driver = { + .name = "ltc4286", + .of_match_table = ltc4286_of_match, + }, + .probe = ltc4286_probe, + .id_table = ltc4286_id, +}; + +module_i2c_driver(ltc4286_driver); + +MODULE_AUTHOR("Delphine CC Chiu "); +MODULE_DESCRIPTION("PMBUS driver for LTC4286 and compatibles"); +MODULE_LICENSE("GPL");