From patchwork Fri Jun 7 09:05:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Noah Wang X-Patchwork-Id: 13689529 Received: from APC01-PSA-obe.outbound.protection.outlook.com (mail-psaapc01olkn2068.outbound.protection.outlook.com [40.92.52.68]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1AE4715B54B; Fri, 7 Jun 2024 09:06:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.92.52.68 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717751184; cv=fail; b=faMzn8rncBjh2ne22c+xV03yo2+CUAk5mBYq1Vz0zzGoofwKyHPhmz+fnPFpk1vgzVYBQUCD4zHaxkclL0M/Y6oSIrR+OYl2zwhgg8XfcprQszuqit6A2T5oFvZbpFEksXdpEYFvG6NYtyPahNr7PcZNLJ8BH1Oy7PSBu1ZCT1s= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717751184; c=relaxed/simple; bh=+RmJepZ3+TrILGtMLfWqPHHsXgvqOpJ+GELM2VcY0BU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=kk9Sfy/3NXBD7PmfgavfeP4bYDSQ7kgn53dd/nHR4fPcCQghGwN67/BbDjvpLL54p+1p7xxvj2aIwpzDRegY9Qqmr7Tho5v7lBNbPj+2onsd0hTQEjobItydRHPhqoAwTyfpAoQjyHw889WNdTRsq+frUF/PlizD40uXjatCHFY= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=outlook.com; spf=pass smtp.mailfrom=outlook.com; dkim=pass (2048-bit key) header.d=outlook.com header.i=@outlook.com header.b=KEWzKPRh; arc=fail smtp.client-ip=40.92.52.68 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=outlook.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=outlook.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=outlook.com header.i=@outlook.com header.b="KEWzKPRh" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Enys7kP9e2DEd92IGPZ2xu14shk/DPZyNWCjTTGxZzj9c6J5ZQVQ9LhSVm/WK/NYayPhMRHZxMbwbtjyuG5CIfoSUngPaiXE21W/p8wLkb8vn6SqZgbnvPQK3tr26xsa3/sx7h55xx5/8op6fxFUIvhrAukdq3kDwuOTlhLqh+4AgghGFtKuNsjn+X3OMBamt5oq78JF/LEg4xbgIe+OBz6cldiWS9ZLLgS3a8WfjX11E9uHb324y7N6ETEs03aW9llVJvYqmCc0PK2J69DdmAdnUzXd/tIAe0JmOzvfDLFqjYHsFxWvaEGm2IN4dTQP/cF5DFuMGRLtgNk4kZn8uA== 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=yZGMVNpGzlLiYXB7VC7Z7xEFkvRplRsFxfZ0u96iALY=; b=djrEo/cuu2nTHT/I3oO0dbb5NH9UiptrMs+rrwl1nWQECCmO1KiH+g9N854ytUwm23cLmMl63hSpHSu02gFr1Semb63x6BVa/eU75wuSsDr+fpqP+S8/939SLNPm+WM67VxKQDzAf+4EdY4MCAOmstdonK8vmFEEYQ1TRiuF0llwM6MpZz4FJLVnsPVqIQRE1jWP8i2PlF8kBlRfYiSIo2sGXYcAIFMdHEStH2rcloVp7gCyD+7JKXKzDmJmcRr+1VYVumogWgI5Uy+rrNoX0Ablao5YxBh4NoLb71Ubb7YVYXGkVXF1RkqqQ/x2/TRd89kQZX33IYYOXv7MbGZ0QA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none; dkim=none; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=outlook.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=yZGMVNpGzlLiYXB7VC7Z7xEFkvRplRsFxfZ0u96iALY=; b=KEWzKPRhyVGS5MXJ54L4JAdebYdbiIQbVzauymg7Z5nSLsRJlWzabENbEUFxaArNqVHItdClTiqiEulVvwzPnKgFyKEOTAy0fSSAB6bNujU5Xkf5mzJ0r++gvN0gynyF79HjNlIMH6uRN7fXApTjwaarDGpIQTVrv59xvFBQodwCh8XNuk7lWFAYOwWAQCFllCCdQ+n2RwU+ROGqUsXq6X+7Qqn7mEh4jJKcXOx0f73i64jKEe0DqweRkrvL6s5SJzD+QXVRkso4270zEC80DxJ9/JzFXhst/04YLAvFPZKr0JchRahUP4f0yamynSZ/aqLFwyqZ6+eB0kfz88X7EQ== Received: from SEYPR04MB6482.apcprd04.prod.outlook.com (2603:1096:101:be::7) by SEZPR04MB8048.apcprd04.prod.outlook.com (2603:1096:101:238::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7633.33; Fri, 7 Jun 2024 09:06:15 +0000 Received: from SEYPR04MB6482.apcprd04.prod.outlook.com ([fe80::ca2b:8a48:a7ab:60e5]) by SEYPR04MB6482.apcprd04.prod.outlook.com ([fe80::ca2b:8a48:a7ab:60e5%5]) with mapi id 15.20.7633.033; Fri, 7 Jun 2024 09:06:15 +0000 From: Noah Wang To: robh@kernel.org, krzk+dt@kernel.org, linux@roeck-us.net, conor+dt@kernel.org, jdelvare@suse.com Cc: corbet@lwn.net, Delphine_CC_Chiu@Wiwynn.com, peteryin.openbmc@gmail.com, javier.carrasco.cruz@gmail.com, patrick.rudolph@9elements.com, bhelgaas@google.com, lukas@wunner.de, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, linux-i2c@vger.kernel.org, Noah Wang Subject: [PATCH 2/4] hwmon: add MP2993 driver Date: Fri, 7 Jun 2024 17:05:42 +0800 Message-ID: X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240607090544.466833-1-noahwang.wang@outlook.com> References: <20240607090544.466833-1-noahwang.wang@outlook.com> X-TMN: [tPQ2QGgpY7zF1xicZb+XuhiNlqVn2bnV] X-ClientProxiedBy: TYWP286CA0001.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:178::12) To SEYPR04MB6482.apcprd04.prod.outlook.com (2603:1096:101:be::7) X-Microsoft-Original-Message-ID: <20240607090544.466833-3-noahwang.wang@outlook.com> Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SEYPR04MB6482:EE_|SEZPR04MB8048:EE_ X-MS-Office365-Filtering-Correlation-Id: 33ff0aab-6879-445c-23e0-08dc86d1160f X-Microsoft-Antispam: BCL:0;ARA:14566002|461199019|1602099003|440099019|3412199016|1710799017; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 33ff0aab-6879-445c-23e0-08dc86d1160f X-MS-Exchange-CrossTenant-AuthSource: SEYPR04MB6482.apcprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jun 2024 09:06:15.8576 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: SEZPR04MB8048 Add support for MPS VR controller mp2993. This driver exposes telemetry and limit value readings and writtings. Signed-off-by: Noah Wang --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/mp2993.rst | 150 ++++++++++++++++++ MAINTAINERS | 7 + drivers/hwmon/pmbus/Kconfig | 9 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/mp2993.c | 269 +++++++++++++++++++++++++++++++++ 6 files changed, 437 insertions(+) create mode 100644 Documentation/hwmon/mp2993.rst create mode 100644 drivers/hwmon/pmbus/mp2993.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 03d313af469a..9d9d55b889f2 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -166,6 +166,7 @@ Hardware Monitoring Kernel Drivers mp2856 mp2888 mp2975 + mp2993 mp5023 mp5990 mpq8785 diff --git a/Documentation/hwmon/mp2993.rst b/Documentation/hwmon/mp2993.rst new file mode 100644 index 000000000000..a14bb30969f9 --- /dev/null +++ b/Documentation/hwmon/mp2993.rst @@ -0,0 +1,150 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver mp2993 +==================== + +Supported chips: + + * MPS mp2993 + + Prefix: 'mp2993' + + * Datasheet + https://scnbwymvp-my.sharepoint.com/:f:/g/personal/admin_scnbwy_com/Eth4kX1_J1hMsaASHiOYL4QBHU5a75r-tRfLKbHnJFdKLQ?e=vxj3DF + +Author: + + Noah Wang + +Description +----------- + +This driver implements support for Monolithic Power Systems, Inc. (MPS) +MP2993 Dual Loop Digital Multi-phase Controller. + +Device compliant with: + +- PMBus rev 1.3 interface. + +The driver exports the following attributes via the 'sysfs' files +for input voltage: + +**in1_input** + +**in1_label** + +**in1_crit** + +**in1_crit_alarm** + +**in1_lcrit** + +**in1_lcrit_alarm** + +**in1_max** + +**in1_max_alarm** + +**in1_min** + +**in1_min_alarm** + +The driver provides the following attributes for output voltage: + +**in2_input** + +**in2_label** + +**in2_crit** + +**in2_crit_alarm** + +**in2_lcrit** + +**in2_lcrit_alarm** + +**in3_input** + +**in3_label** + +**in3_crit** + +**in3_crit_alarm** + +**in3_lcrit** + +**in3_lcrit_alarm** + +The driver provides the following attributes for input current: + +**curr1_input** + +**curr1_label** + +**curr1_max** + +**curr1_max_alarm** + +The driver provides the following attributes for output current: + +**curr2_input** + +**curr2_label** + +**curr2_crit** + +**curr2_crit_alarm** + +**curr2_max** + +**curr2_max_alarm** + +**curr3_input** + +**curr3_label** + +**curr3_crit** + +**curr3_crit_alarm** + +**curr3_max** + +**curr3_max_alarm** + +The driver provides the following attributes for input power: + +**power1_input** + +**power1_label** + +The driver provides the following attributes for output power: + +**power2_input** + +**power2_label** + +**power3_input** + +**power3_label** + +The driver provides the following attributes for temperature: + +**temp1_input** + +**temp1_crit** + +**temp1_crit_alarm** + +**temp1_max** + +**temp1_max_alarm** + +**temp2_input** + +**temp2_crit** + +**temp2_crit_alarm** + +**temp2_max** + +**temp2_max_alarm** diff --git a/MAINTAINERS b/MAINTAINERS index 8754ac2c259d..f47f3e13b004 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15258,6 +15258,13 @@ S: Maintained F: Documentation/devicetree/bindings/leds/backlight/mps,mp3309c.yaml F: drivers/video/backlight/mp3309c.c ++MPS MP2993 DRIVER ++M: Noah Wang ++L: linux-hwmon@vger.kernel.org ++S: Maintained ++F: Documentation/hwmon/mp2993.rst ++F: drivers/hwmon/pmbus/mp2993.c + MR800 AVERMEDIA USB FM RADIO DRIVER M: Alexey Klimov L: linux-media@vger.kernel.org diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 08e82c457356..d875d31ce84c 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -346,6 +346,15 @@ config SENSORS_MP2975 This driver can also be built as a module. If so, the module will be called mp2975. +config SENSORS_MP2993 + tristate "MPS MP2993" + help + If you say yes here you get hardware monitoring support for MPS + MP2993 Dual Loop Digital Multi-Phase Controller. + + This driver can also be built as a module. If so, the module will + be called mp2993. + config SENSORS_MP2975_REGULATOR depends on SENSORS_MP2975 && REGULATOR bool "Regulator support for MPS MP2975" diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index 2279b3327bbf..312d3f0c0540 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -37,6 +37,7 @@ obj-$(CONFIG_SENSORS_MAX8688) += max8688.o obj-$(CONFIG_SENSORS_MP2856) += mp2856.o obj-$(CONFIG_SENSORS_MP2888) += mp2888.o obj-$(CONFIG_SENSORS_MP2975) += mp2975.o +obj-$(CONFIG_SENSORS_MP2993) += mp2993.o obj-$(CONFIG_SENSORS_MP5023) += mp5023.o obj-$(CONFIG_SENSORS_MP5990) += mp5990.o obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o diff --git a/drivers/hwmon/pmbus/mp2993.c b/drivers/hwmon/pmbus/mp2993.c new file mode 100644 index 000000000000..43432b8d4faf --- /dev/null +++ b/drivers/hwmon/pmbus/mp2993.c @@ -0,0 +1,269 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for MPS Multi-phase Digital VR Controllers(MP2993) + */ + +#include +#include +#include +#include "pmbus.h" + +#define MP2993_VOUT_OVUV_UINT 125 +#define MP2993_VOUT_OVUV_DIV 64 +#define MP2993_VIN_LIMIT_UINT 1 +#define MP2993_VIN_LIMIT_DIV 8 +#define MP2993_READ_VIN_UINT 1 +#define MP2993_READ_VIN_DIV 32 + +#define MP2993_PAGE_NUM 2 + +#define MP2993_RAIL1_FUNC (PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | \ + PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | \ + PMBUS_HAVE_TEMP | PMBUS_HAVE_PIN | \ + PMBUS_HAVE_IIN | \ + PMBUS_HAVE_STATUS_VOUT | \ + PMBUS_HAVE_STATUS_IOUT | \ + PMBUS_HAVE_STATUS_TEMP | \ + PMBUS_HAVE_STATUS_INPUT) + +#define MP2993_RAIL2_FUNC (PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | \ + PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP | \ + PMBUS_HAVE_STATUS_VOUT | \ + PMBUS_HAVE_STATUS_IOUT | \ + PMBUS_HAVE_STATUS_TEMP | \ + PMBUS_HAVE_STATUS_INPUT) + +/* Converts a linear11 data exponent to a specified value */ +static u16 mp2993_linear11_exponent_transfer(u16 word, u16 expect_exponent) +{ + s16 exponent, mantissa, target_exponent; + + exponent = ((s16)word) >> 11; + mantissa = ((s16)((word & 0x7ff) << 5)) >> 5; + target_exponent = (s16)((expect_exponent & 0x1f) << 11) >> 11; + + if (exponent > target_exponent) + mantissa = mantissa << (exponent - target_exponent); + else + mantissa = mantissa >> (target_exponent - exponent); + + return (mantissa & 0x7ff) | ((expect_exponent << 11) & 0xf800); +} + +static int +mp2993_set_vout_format(struct i2c_client *client, int page, int format) +{ + int ret; + + ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, PMBUS_VOUT_MODE, format); + if (ret < 0) + return ret; + + return 0; +} + +static int mp2993_identify(struct i2c_client *client, struct pmbus_driver_info *info) +{ + int ret; + + /* Set vout to direct format for rail1. */ + ret = mp2993_set_vout_format(client, 0, PB_VOUT_MODE_DIRECT); + if (ret < 0) + return ret; + + /* Set vout to direct format for rail2. */ + ret = mp2993_set_vout_format(client, 1, PB_VOUT_MODE_DIRECT); + if (ret < 0) + return ret; + + return ret; +} + +static int mp2993_read_word_data(struct i2c_client *client, int page, int phase, + int reg) +{ + int ret; + + switch (reg) { + case PMBUS_VOUT_OV_FAULT_LIMIT: + case PMBUS_VOUT_UV_FAULT_LIMIT: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST(ret * MP2993_VOUT_OVUV_UINT, MP2993_VOUT_OVUV_DIV); + break; + case PMBUS_OT_FAULT_LIMIT: + case PMBUS_OT_WARN_LIMIT: + /* + * The MP2993 ot fault limit value and ot warn limit value + * per rail are always the same, so only PMBUS_OT_FAULT_LIMIT + * and PMBUS_OT_WARN_LIMIT register in page 0 are defined to + * indicates the limit value. + */ + ret = pmbus_read_word_data(client, 0, phase, reg); + break; + case PMBUS_READ_VIN: + /* The MP2993 vin scale is (1/32V)/Lsb */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST((ret & GENMASK(9, 0)) * MP2993_READ_VIN_UINT, + MP2993_READ_VIN_DIV); + break; + case PMBUS_VIN_OV_FAULT_LIMIT: + case PMBUS_VIN_OV_WARN_LIMIT: + case PMBUS_VIN_UV_WARN_LIMIT: + case PMBUS_VIN_UV_FAULT_LIMIT: + /* The MP2993 vin limit scale is (1/8V)/Lsb */ + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + + ret = DIV_ROUND_CLOSEST((ret & GENMASK(7, 0)) * MP2993_VIN_LIMIT_UINT, + MP2993_VIN_LIMIT_DIV); + break; + case PMBUS_READ_IOUT: + case PMBUS_READ_IIN: + case PMBUS_IIN_OC_WARN_LIMIT: + case PMBUS_IOUT_OC_FAULT_LIMIT: + case PMBUS_IOUT_OC_WARN_LIMIT: + case PMBUS_READ_VOUT: + case PMBUS_READ_PIN: + case PMBUS_READ_POUT: + case PMBUS_READ_TEMPERATURE_1: + ret = -ENODATA; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int mp2993_write_word_data(struct i2c_client *client, int page, int reg, + u16 word) +{ + int ret; + + switch (reg) { + case PMBUS_VOUT_OV_FAULT_LIMIT: + case PMBUS_VOUT_UV_FAULT_LIMIT: + ret = DIV_ROUND_CLOSEST(word * MP2993_VOUT_OVUV_DIV, MP2993_VOUT_OVUV_UINT); + ret = pmbus_write_word_data(client, 0, reg, ret); + break; + case PMBUS_OT_FAULT_LIMIT: + case PMBUS_OT_WARN_LIMIT: + /* + * The MP2993 ot fault limit value and ot warn limit value + * per rail are always the same, so only PMBUS_OT_FAULT_LIMIT + * and PMBUS_OT_WARN_LIMIT register in page 0 are defined to + * config the ot limit value. + */ + ret = pmbus_write_word_data(client, 0, reg, word); + break; + case PMBUS_VIN_OV_FAULT_LIMIT: + case PMBUS_VIN_OV_WARN_LIMIT: + case PMBUS_VIN_UV_WARN_LIMIT: + case PMBUS_VIN_UV_FAULT_LIMIT: + /* The MP2993 vin limit scale is (1/8V)/Lsb */ + ret = pmbus_write_word_data(client, 0, reg, + DIV_ROUND_CLOSEST(word * MP2993_VIN_LIMIT_DIV, + MP2993_VIN_LIMIT_UINT)); + break; + case PMBUS_IIN_OC_WARN_LIMIT: + /* + * The PMBUS_IIN_OC_WARN_LIMIT of MP2993 is linear11 format, + * and the exponent is a constant value(5'b00000)， so the + * exponent of word parameter should be converted to 5'b00000. + */ + ret = pmbus_write_word_data(client, page, reg, + mp2993_linear11_exponent_transfer(word, 0x00)); + break; + // + case PMBUS_IOUT_OC_FAULT_LIMIT: + case PMBUS_IOUT_OC_WARN_LIMIT: + /* + * The PMBUS_IOUT_OC_FAULT_LIMIT and PMBUS_IOUT_OC_WARN_LIMIT + * of MP2993 can be regarded as linear11 format, and the + * exponent is a 5'b00001 or 5'b00000. To ensure a larger + * range of limit value, so the exponent of word parameter + * should be converted to 5'b00001. + */ + ret = pmbus_write_word_data(client, page, reg, + mp2993_linear11_exponent_transfer(word, 0x01)); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static struct pmbus_driver_info mp2993_info = { + .pages = MP2993_PAGE_NUM, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_CURRENT_IN] = linear, + .format[PSC_CURRENT_OUT] = linear, + .format[PSC_TEMPERATURE] = direct, + .format[PSC_POWER] = linear, + .format[PSC_VOLTAGE_OUT] = direct, + + .m[PSC_VOLTAGE_OUT] = 1, + .R[PSC_VOLTAGE_OUT] = 3, + .b[PSC_VOLTAGE_OUT] = 0, + + .m[PSC_VOLTAGE_IN] = 1, + .R[PSC_VOLTAGE_IN] = 0, + .b[PSC_VOLTAGE_IN] = 0, + + .m[PSC_TEMPERATURE] = 1, + .R[PSC_TEMPERATURE] = 0, + .b[PSC_TEMPERATURE] = 0, + + .func[0] = MP2993_RAIL1_FUNC, + .func[1] = MP2993_RAIL2_FUNC, + .read_word_data = mp2993_read_word_data, + .write_word_data = mp2993_write_word_data, + .identify = mp2993_identify, +}; + +static int mp2993_probe(struct i2c_client *client) +{ + return pmbus_do_probe(client, &mp2993_info); +} + +static const struct i2c_device_id mp2993_id[] = { + {"mp2993", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, mp2993_id); + +static const struct of_device_id __maybe_unused mp2993_of_match[] = { + {.compatible = "mps,mp2993"}, + {} +}; +MODULE_DEVICE_TABLE(of, mp2993_of_match); + +static struct i2c_driver mp2993_driver = { + .driver = { + .name = "mp2993", + .of_match_table = mp2993_of_match, + }, + .probe = mp2993_probe, + .id_table = mp2993_id, +}; + +module_i2c_driver(mp2993_driver); + +MODULE_AUTHOR("Noah Wang "); +MODULE_DESCRIPTION("PMBus driver for MPS MP2993"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS);