From cd228e7b65d43c441964a17f02c92f33d2c4af7b Mon Sep 17 00:00:00 2001 From: Alex Vdovydchenko Date: Tue, 2 Jul 2024 14:52:51 +0300 Subject: [PATCH] hwmon: add MP5920 driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add support for MPS Hot-Swap controller mp5920. This driver exposes telemetry and limit value readings and writings. Signed-off-by: Alex Vdovydchenko Reviewed-by: Thomas Weißschuh 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 --- 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 | 90 +++++++++++++++++++++++++++++++++ 5 files changed, 192 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 3b43a33547ae..1241b7442233 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -169,6 +169,7 @@ 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 index 000000000000..98946e7cf54e --- /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 index 338b2e98dc22..a4f02cad92fd 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -380,6 +380,15 @@ 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 index 8afc5ba748f6..d00bcc758b97 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -40,6 +40,7 @@ obj-$(CONFIG_SENSORS_MP2891) += mp2891.o obj-$(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 index 000000000000..f6d7527ade7d --- /dev/null +++ b/drivers/hwmon/pmbus/mp5920.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for MP5920 and compatible chips. + */ + +#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 ret; + u8 buf[I2C_SMBUS_BLOCK_MAX]; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_WORD_DATA)) + return -ENODEV; + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to read PMBUS_MFR_MODEL\n"); + + if (ret != 6 || strncmp(buf, "MP5920", 6)) { + return dev_err_probe(dev, -ENODEV, "Model '%.*s' not supported\n", + min_t(int, ret, sizeof(buf)), buf); + } + + return pmbus_do_probe(client, &mp5920_info); +} + +static const struct of_device_id mp5920_of_match[] = { + { .compatible = "mps,mp5920" }, + { } +}; + +MODULE_DEVICE_TABLE(of, mp5920_of_match); + +static const struct i2c_device_id mp5920_id[] = { + { "mp5920" }, + { } +}; + +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);