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This driver exposes telemetry and limits value readings and writtings. Signed-off-by: Alex Vdovydchenko --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/mp5920.rst | 91 +++++++++++++++++++++++++++++++++ drivers/hwmon/pmbus/Kconfig | 9 ++++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/mp5920.c | 93 ++++++++++++++++++++++++++++++++++ 5 files changed, 195 insertions(+) create mode 100644 Documentation/hwmon/mp5920.rst create mode 100644 drivers/hwmon/pmbus/mp5920.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index e92a3d5c7..9eba7e402 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -168,6 +168,7 @@ Hardware Monitoring Kernel Drivers mp2975 mp2993 mp5023 + mp5920 mp5990 mp9941 mpq8785 diff --git a/Documentation/hwmon/mp5920.rst b/Documentation/hwmon/mp5920.rst new file mode 100644 --- /dev/null +++ b/Documentation/hwmon/mp5920.rst @@ -0,0 +1,91 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver mp5920 +==================== + +Supported chips: + + * MPS MP5920 + + Prefix: 'mp5920' + + * Datasheet + + Publicly available at the MPS website : https://www.monolithicpower.com/en/mp5920.html + +Authors: + + Tony Ao + Alex Vdovydchenko + +Description +----------- + +This driver implements support for Monolithic Power Systems, Inc. (MPS) +MP5920 Hot-Swap Controller. + +Device compliant with: + +- PMBus rev 1.3 interface. + +Device supports direct and linear format for reading input voltage, +output voltage, output current, input power and temperature. + +The driver exports the following attributes via the 'sysfs' files +for input voltage: + +**in1_input** + +**in1_label** + +**in1_rated_max** + +**in1_rated_min** + +**in1_crit** + +**in1_alarm** + +The driver provides the following attributes for output voltage: + +**in2_input** + +**in2_label** + +**in2_rated_max** + +**in2_rated_min** + +**in2_alarm** + +The driver provides the following attributes for output current: + +**curr1_input** + +**curr1_label** + +**curr1_crit** + +**curr1_alarm** + +**curr1_rated_max** + +The driver provides the following attributes for input power: + +**power1_input** + +**power1_label** + +**power1_max** + +**power1_rated_max** + +The driver provides the following attributes for temperature: + +**temp1_input** + +**temp1_max** + +**temp1_crit** + +**temp1_alarm** diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -371,6 +371,15 @@ config SENSORS_MP5023 This driver can also be built as a module. If so, the module will be called mp5023. +config SENSORS_MP5920 + tristate "MPS MP5920" + help + If you say yes here you get hardware monitoring support for Monolithic + MP5920. + + This driver can also be built as a module. If so, the module will + be called mp5920. + config SENSORS_MP5990 tristate "MPS MP5990" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -39,6 +39,7 @@ 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-$(CONFIG_SENSORS_MP5920) += mp5920.o obj-$(CONFIG_SENSORS_MP5990) += mp5990.o obj-$(CONFIG_SENSORS_MP9941) += mp9941.o obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o diff --git a/drivers/hwmon/pmbus/mp5920.c b/drivers/hwmon/pmbus/mp5920.c new file mode 100644 --- /dev/null +++ b/drivers/hwmon/pmbus/mp5920.c @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for MP5920 and compatible chips. + * + * Copyright (c) 2019 Facebook Inc. + * + * 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 "pmbus.h" + +static struct pmbus_driver_info mp5920_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] = 2266, + b[PSC_VOLTAGE_IN] = 0, + R[PSC_VOLTAGE_IN] = -1, + m[PSC_VOLTAGE_OUT] = 2266, + b[PSC_VOLTAGE_OUT] = 0, + R[PSC_VOLTAGE_OUT] = -1, + m[PSC_CURRENT_OUT] = 546, + b[PSC_CURRENT_OUT] = 0, + R[PSC_CURRENT_OUT] = -2, + m[PSC_POWER] = 5840, + b[PSC_POWER] = 0, + R[PSC_POWER] = -3, + m[PSC_TEMPERATURE] = 1067, + b[PSC_TEMPERATURE] = 20500, + R[PSC_TEMPERATURE] = -2, + func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | + PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | + PMBUS_HAVE_TEMP, +}; + +static int mp5920_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + int chip_id; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_WORD_DATA)) + return -ENODEV; + + chip_id = i2c_smbus_read_word_data(client, PMBUS_MFR_ID); + if (chip_id < 0) { + dev_err(dev, "Failed to read MFR ID"); + return chip_id; + } + + return pmbus_do_probe(client, &mp5920_info); +} + +static const struct of_device_id mp5920_of_match[] = { + { .compatible = "mps,mp5920" }, + {} +}; + +static const struct i2c_device_id mp5920_id[] = { + {"mp5920", 0}, + { } +}; +MODULE_DEVICE_TABLE(i2c, mp5920_id); + +static struct i2c_driver mp5920_driver = { + .driver = { + .name = "mp5920", + .of_match_table = mp5920_of_match, + }, + .probe = mp5920_probe, + .id_table = mp5920_id, +}; +module_i2c_driver(mp5920_driver); + +MODULE_AUTHOR("Tony Ao "); +MODULE_AUTHOR("Alex Vdovydchenko "); +MODULE_DESCRIPTION("PMBus driver for MP5920 HSC"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS);