hwmon: add MP5920 driver
Add support for MPS Hot-Swap controller mp5920. This driver exposes telemetry and limit value readings and writings. Signed-off-by: Alex Vdovydchenko <xzeol@yahoo.com> Reviewed-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/r/20240702115252.981416-3-xzeol@yahoo.com [groeck: Use min_t() to limit length of displayed model string] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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@ -169,6 +169,7 @@ Hardware Monitoring Kernel Drivers
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mp2975
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mp2975
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mp2993
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mp2993
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mp5023
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mp5023
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mp5920
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mp5990
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mp5990
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mp9941
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mp9941
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mpq8785
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mpq8785
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91
Documentation/hwmon/mp5920.rst
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91
Documentation/hwmon/mp5920.rst
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@ -0,0 +1,91 @@
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.. SPDX-License-Identifier: GPL-2.0
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Kernel driver mp5920
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====================
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Supported chips:
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* MPS MP5920
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Prefix: 'mp5920'
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* Datasheet
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Publicly available at the MPS website : https://www.monolithicpower.com/en/mp5920.html
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Authors:
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Tony Ao <tony_ao@wiwynn.com>
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Alex Vdovydchenko <xzeol@yahoo.com>
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Description
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-----------
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This driver implements support for Monolithic Power Systems, Inc. (MPS)
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MP5920 Hot-Swap Controller.
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Device compliant with:
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- PMBus rev 1.3 interface.
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Device supports direct and linear format for reading input voltage,
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output voltage, output current, input power and temperature.
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The driver exports the following attributes via the 'sysfs' files
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for input voltage:
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**in1_input**
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**in1_label**
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**in1_rated_max**
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**in1_rated_min**
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**in1_crit**
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**in1_alarm**
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The driver provides the following attributes for output voltage:
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**in2_input**
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**in2_label**
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**in2_rated_max**
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**in2_rated_min**
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**in2_alarm**
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The driver provides the following attributes for output current:
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**curr1_input**
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**curr1_label**
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**curr1_crit**
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**curr1_alarm**
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**curr1_rated_max**
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The driver provides the following attributes for input power:
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**power1_input**
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**power1_label**
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**power1_max**
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**power1_rated_max**
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The driver provides the following attributes for temperature:
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**temp1_input**
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**temp1_max**
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**temp1_crit**
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**temp1_alarm**
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@ -380,6 +380,15 @@ config SENSORS_MP5023
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This driver can also be built as a module. If so, the module will
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This driver can also be built as a module. If so, the module will
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be called mp5023.
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be called mp5023.
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config SENSORS_MP5920
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tristate "MPS MP5920"
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help
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If you say yes here you get hardware monitoring support for Monolithic
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MP5920.
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This driver can also be built as a module. If so, the module will
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be called mp5920.
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config SENSORS_MP5990
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config SENSORS_MP5990
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tristate "MPS MP5990"
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tristate "MPS MP5990"
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help
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help
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@ -40,6 +40,7 @@ obj-$(CONFIG_SENSORS_MP2891) += mp2891.o
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obj-$(CONFIG_SENSORS_MP2975) += mp2975.o
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obj-$(CONFIG_SENSORS_MP2975) += mp2975.o
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obj-$(CONFIG_SENSORS_MP2993) += mp2993.o
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obj-$(CONFIG_SENSORS_MP2993) += mp2993.o
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obj-$(CONFIG_SENSORS_MP5023) += mp5023.o
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obj-$(CONFIG_SENSORS_MP5023) += mp5023.o
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obj-$(CONFIG_SENSORS_MP5920) += mp5920.o
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obj-$(CONFIG_SENSORS_MP5990) += mp5990.o
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obj-$(CONFIG_SENSORS_MP5990) += mp5990.o
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obj-$(CONFIG_SENSORS_MP9941) += mp9941.o
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obj-$(CONFIG_SENSORS_MP9941) += mp9941.o
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obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o
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obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o
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90
drivers/hwmon/pmbus/mp5920.c
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90
drivers/hwmon/pmbus/mp5920.c
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Hardware monitoring driver for MP5920 and compatible chips.
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*/
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#include <linux/i2c.h>
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#include <linux/minmax.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include "pmbus.h"
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static struct pmbus_driver_info mp5920_info = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = direct,
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.format[PSC_VOLTAGE_OUT] = direct,
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.format[PSC_CURRENT_OUT] = direct,
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.format[PSC_POWER] = direct,
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.format[PSC_TEMPERATURE] = direct,
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.m[PSC_VOLTAGE_IN] = 2266,
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.b[PSC_VOLTAGE_IN] = 0,
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.R[PSC_VOLTAGE_IN] = -1,
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.m[PSC_VOLTAGE_OUT] = 2266,
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.b[PSC_VOLTAGE_OUT] = 0,
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.R[PSC_VOLTAGE_OUT] = -1,
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.m[PSC_CURRENT_OUT] = 546,
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.b[PSC_CURRENT_OUT] = 0,
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.R[PSC_CURRENT_OUT] = -2,
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.m[PSC_POWER] = 5840,
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.b[PSC_POWER] = 0,
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.R[PSC_POWER] = -3,
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.m[PSC_TEMPERATURE] = 1067,
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.b[PSC_TEMPERATURE] = 20500,
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.R[PSC_TEMPERATURE] = -2,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT |
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PMBUS_HAVE_TEMP,
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};
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static int mp5920_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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int ret;
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u8 buf[I2C_SMBUS_BLOCK_MAX];
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_READ_WORD_DATA))
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return -ENODEV;
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ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
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if (ret < 0)
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return dev_err_probe(dev, ret, "Failed to read PMBUS_MFR_MODEL\n");
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if (ret != 6 || strncmp(buf, "MP5920", 6)) {
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return dev_err_probe(dev, -ENODEV, "Model '%.*s' not supported\n",
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min_t(int, ret, sizeof(buf)), buf);
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}
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return pmbus_do_probe(client, &mp5920_info);
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}
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static const struct of_device_id mp5920_of_match[] = {
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{ .compatible = "mps,mp5920" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, mp5920_of_match);
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static const struct i2c_device_id mp5920_id[] = {
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{ "mp5920" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, mp5920_id);
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static struct i2c_driver mp5920_driver = {
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.driver = {
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.name = "mp5920",
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.of_match_table = mp5920_of_match,
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},
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.probe = mp5920_probe,
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.id_table = mp5920_id,
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};
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module_i2c_driver(mp5920_driver);
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MODULE_AUTHOR("Tony Ao <tony_ao@wiwynn.com>");
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MODULE_AUTHOR("Alex Vdovydchenko <xzeol@yahoo.com>");
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MODULE_DESCRIPTION("PMBus driver for MP5920 HSC");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS(PMBUS);
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