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Mon, 24 Apr 2023 10:14:04 +0000 Received: from PSAAPC01FT059.eop-APC01.prod.protection.outlook.com (2603:1096:300:2d:cafe::69) by PS2PR01CA0017.outlook.office365.com (2603:1096:300:2d::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6319.33 via Frontend Transport; Mon, 24 Apr 2023 10:14:03 +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 PSAAPC01FT059.mail.protection.outlook.com (10.13.38.139) with Microsoft SMTP Server id 15.20.6340.19 via Frontend Transport; Mon, 24 Apr 2023 10:14:03 +0000 From: Delphine CC Chiu To: patrick@stwcx.xyz, Delphine CC Chiu , Jean Delvare , Guenter Roeck , Rob Herring , Krzysztof Kozlowski Cc: linux-i2c@vger.kernel.org, linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 1/2] dt-bindings: hwmon: Add lltc ltc4286 driver bindings Date: Mon, 24 Apr 2023 18:13:49 +0800 Message-Id: <20230424101352.28117-2-Delphine_CC_Chiu@Wiwynn.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230424101352.28117-1-Delphine_CC_Chiu@Wiwynn.com> References: <20230424101352.28117-1-Delphine_CC_Chiu@Wiwynn.com> X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PSAAPC01FT059:EE_|TYUPR04MB6639:EE_ MIME-Version: 1.0 X-MS-Office365-Filtering-Correlation-Id: 458a3fb4-4339-4c97-e2ba-08db44aca193 X-MS-Exchange-AtpMessageProperties: SA X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: wiwynn.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Apr 2023 10:14:03.2848 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 458a3fb4-4339-4c97-e2ba-08db44aca193 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: PSAAPC01FT059.eop-APC01.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYUPR04MB6639 Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Add a device tree bindings for ltc4286 driver. Signed-off-by: Delphine CC Chiu --- .../bindings/hwmon/lltc,ltc4286.yaml | 47 +++++++++++++++++++ MAINTAINERS | 9 ++++ 2 files changed, 56 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..c1c8e310f9c4 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml @@ -0,0 +1,47 @@ +# 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 + + vrange_select_25p6: + description: + This property is a bool parameter to represent the + voltage range is 25.6 or not for this chip. + + rsense-micro-ohms: + description: + Resistor value in micro-Ohm + +required: + - compatible + - reg + - rsense-micro-ohms + +additionalProperties: false + +examples: + - | + i2c { + status = "okay"; + ltc4286@40 { + compatible = "lltc,ltc4286"; + reg = <0x40>; + vrange_select_25p6; + rsense-micro-ohms = <300>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index c6545eb54104..930bdba0f73c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12183,6 +12183,15 @@ 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: 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 Mon Apr 24 10:13:50 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: 13221986 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AE70BC7618E for ; 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X-OriginatorOrg: wiwynn.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Apr 2023 10:14:08.7222 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d07d1931-df8e-4df9-8684-08db44aca4d1 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: PSAAPC01FT059.eop-APC01.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: KL1PR04MB6781 Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Add support for ltc4286 driver Signed-off-by: Delphine CC Chiu --- drivers/hwmon/pmbus/Kconfig | 9 +++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/ltc4286.c | 142 ++++++++++++++++++++++++++++++++++ 3 files changed, 152 insertions(+) create mode 100644 drivers/hwmon/pmbus/ltc4286.c diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 59d9a7430499..1230d910d681 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -218,6 +218,15 @@ config SENSORS_LTC3815 This driver can also be built as a module. If so, the module will be called ltc3815. +config SENSORS_LTC4286 + bool "Linear Technologies LTC4286" + help + If you say yes here you get hardware monitoring support for Linear + Technology LTC4286. + + This driver can also be built as a module. If so, the module will + be called ltc4286. + config SENSORS_MAX15301 tristate "Maxim MAX15301" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index 3ae019916267..540265539580 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -23,6 +23,7 @@ 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..474f4ec9107c --- /dev/null +++ b/drivers/hwmon/pmbus/ltc4286.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for LTC4286 Hot-Swap Controller + * + * Copyright (c) 2023 Linear Technology + */ + +#include +#include +#include +#include +#include +#include +#include "pmbus.h" + +// LTC4286 register +#define LTC4286_MFR_CONFIG1 (0xF2) + +// LTC4286 configuration +#define VRANGE_SELECT (1 << 1) + +#define LTC4286_MFR_ID_SIZE 3 + +enum chips { ltc4286, ltc4287 }; + +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, + .R[PSC_CURRENT_OUT] = 3 - 6, + .m[PSC_POWER] = 1, + .b[PSC_POWER] = 0, + .R[PSC_POWER] = 4 - 6, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 273.15, + .R[PSC_TEMPERATURE] = 0, + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | + PMBUS_HAVE_PIN | PMBUS_HAVE_TEMP, +}; + +static int ltc4286_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; + struct device *dev = &client->dev; + struct pmbus_driver_info *info; + u32 rsense; + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); + if (ret < 0) { + dev_err(&client->dev, "failed to read manufacturer id\n"); + return ret; + } + + /* Refer to ltc4286 datasheet page 20 + * the default manufacturer id is LTC + */ + if (ret != LTC4286_MFR_ID_SIZE || + strncmp(block_buffer, "LTC", LTC4286_MFR_ID_SIZE)) { + dev_err(&client->dev, "unsupported manufacturer id\n"); + return -ENODEV; + } + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); + if (ret < 0) { + dev_err(&client->dev, "failed to read manufacturer model\n"); + return ret; + } + + ret = of_property_read_u32(client->dev.of_node, "rsense-micro-ohms", + &rsense); + if (ret < 0) + return ret; + + if (rsense == 0) + return -EINVAL; + + info = <c4286_info; + + /* Default of VRANGE_SELECT = 1 */ + if (device_property_read_bool(dev, "vrange_select_25p6")) { + /* Setup MFR1 CONFIG register bit 1 VRANGE_SELECT */ + ret = i2c_smbus_read_word_data(client, LTC4286_MFR_CONFIG1); + if (ret < 0) { + dev_err(&client->dev, + "failed to read manufacturer configuration one\n"); + return ret; + } + + ret &= ~VRANGE_SELECT; /* VRANGE_SELECT = 0, 25.6V */ + i2c_smbus_write_word_data(client, LTC4286_MFR_CONFIG1, ret); + + info->m[PSC_VOLTAGE_IN] = 128; + info->m[PSC_VOLTAGE_OUT] = 128; + info->m[PSC_POWER] = 4 * rsense; + } else { + info->m[PSC_POWER] = rsense; + } + + info->m[PSC_CURRENT_OUT] = 1024 * rsense; + + return pmbus_do_probe(client, info); +} + +static const struct i2c_device_id ltc4286_id[] = { { "ltc4286", ltc4286 }, + { "ltc4287", ltc4287 }, + {} }; +MODULE_DEVICE_TABLE(i2c, ltc4286_id); + +static const struct of_device_id ltc4286_of_match[] = { + { .compatible = "lltc,ltc4286" }, + { .compatible = "lltc,ltc4287" }, + {} +}; + +/* This is the driver that will be inserted */ +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");