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hwmon: (pmbus/crps) Add Intel CRPS185 power supply
Add the driver to monitor Intel common redundant power supply (crps185) with hwmon over pmbus. Signed-off-by: Ninad Palsule <ninad@linux.ibm.com> Link: https://lore.kernel.org/r/20241217173537.192331-3-ninad@linux.ibm.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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‎Documentation/hwmon/crps.rst

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.. SPDX-License-Identifier: GPL-2.0-or-later
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Kernel driver crps
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==================
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Supported chips:
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* Intel CRPS185
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Prefix: 'crps185'
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Addresses scanned: -
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Datasheet: Only available under NDA.
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Authors:
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Ninad Palsule <ninad@linux.ibm.com>
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Description
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-----------
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This driver implements support for Intel Common Redundant Power supply with
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PMBus support.
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The driver is a client driver to the core PMBus driver.
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Please see Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
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Usage Notes
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-----------
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This driver does not auto-detect devices. You will have to instantiate the
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devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
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details.
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Sysfs entries
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-------------
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======================= ======================================================
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curr1_label "iin"
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curr1_input Measured input current
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curr1_max Maximum input current
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curr1_max_alarm Input maximum current high alarm
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curr1_crit Critial high input current
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curr1_crit_alarm Input critical current high alarm
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curr1_rated_max Maximum rated input current
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curr2_label "iout1"
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curr2_input Measured output current
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curr2_max Maximum output current
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curr2_max_alarm Output maximum current high alarm
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curr2_crit Critial high output current
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curr2_crit_alarm Output critical current high alarm
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curr2_rated_max Maximum rated output current
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in1_label "vin"
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in1_input Measured input voltage
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in1_crit Critical input over voltage
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in1_crit_alarm Critical input over voltage alarm
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in1_max Maximum input over voltage
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in1_max_alarm Maximum input over voltage alarm
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in1_rated_min Minimum rated input voltage
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in1_rated_max Maximum rated input voltage
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in2_label "vout1"
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in2_input Measured input voltage
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in2_crit Critical input over voltage
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in2_crit_alarm Critical input over voltage alarm
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in2_lcrit Critical input under voltage fault
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in2_lcrit_alarm Critical input under voltage fault alarm
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in2_max Maximum input over voltage
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in2_max_alarm Maximum input over voltage alarm
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in2_min Minimum input under voltage warning
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in2_min_alarm Minimum input under voltage warning alarm
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in2_rated_min Minimum rated input voltage
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in2_rated_max Maximum rated input voltage
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power1_label "pin"
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power1_input Measured input power
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power1_alarm Input power high alarm
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power1_max Maximum input power
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power1_rated_max Maximum rated input power
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temp[1-2]_input Measured temperature
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temp[1-2]_crit Critical temperature
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temp[1-2]_crit_alarm Critical temperature alarm
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temp[1-2]_max Maximum temperature
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temp[1-2]_max_alarm Maximum temperature alarm
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temp[1-2]_rated_max Maximum rated temperature
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fan1_alarm Fan 1 warning.
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fan1_fault Fan 1 fault.
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fan1_input Fan 1 speed in RPM.
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fan1_target Fan 1 target.
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======================= ======================================================

‎Documentation/hwmon/index.rst

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corsair-cpro
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corsair-psu
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cros_ec_hwmon
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crps
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da9052
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da9055
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dell-smm-hwmon

‎MAINTAINERS

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S: Maintained
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F: drivers/hid/hid-creative-sb0540.c
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INTEL CRPS COMMON REDUNDANT PSU DRIVER
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M: Ninad Palsule <ninad@linux.ibm.com>
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L: linux-hwmon@vger.kernel.org
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S: Maintained
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F: Documentation/hwmon/crps.rst
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F: drivers/hwmon/pmbus/crps.c
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CRYPTO API
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M: Herbert Xu <herbert@gondor.apana.org.au>
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M: "David S. Miller" <davem@davemloft.net>

‎drivers/hwmon/pmbus/Kconfig

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This driver can also be built as a module. If so, the module will
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be called bpa-rs600.
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config SENSORS_CRPS
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tristate "Intel Common Redundant Power Supply"
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help
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If you say yes here you get hardware monitoring support for the Intel
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Common Redundant Power Supply.
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This driver can also be built as a module. If so, the module will
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be called crps.
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config SENSORS_DELTA_AHE50DC_FAN
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tristate "Delta AHE-50DC fan control module"
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help

‎drivers/hwmon/pmbus/Makefile

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obj-$(CONFIG_SENSORS_XDPE152) += xdpe152c4.o
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obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o
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obj-$(CONFIG_SENSORS_PIM4328) += pim4328.o
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obj-$(CONFIG_SENSORS_CRPS) += crps.o

‎drivers/hwmon/pmbus/crps.c

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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2024 IBM Corp.
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*/
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#include <linux/i2c.h>
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#include <linux/of.h>
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#include <linux/pmbus.h>
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#include "pmbus.h"
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static const struct i2c_device_id crps_id[] = {
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{ "intel_crps185" },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, crps_id);
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static struct pmbus_driver_info crps_info = {
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.pages = 1,
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/* PSU uses default linear data format. */
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.func[0] = PMBUS_HAVE_PIN | PMBUS_HAVE_IOUT |
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PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_IIN |
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PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT |
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PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
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PMBUS_HAVE_STATUS_TEMP |
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PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
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};
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static int crps_probe(struct i2c_client *client)
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{
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int rc;
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struct device *dev = &client->dev;
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char buf[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
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rc = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
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if (rc < 0)
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return dev_err_probe(dev, rc, "Failed to read PMBUS_MFR_MODEL\n");
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if (rc != 7 || strncmp(buf, "03NK260", 7)) {
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buf[rc] = '\0';
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return dev_err_probe(dev, -ENODEV, "Model '%s' not supported\n", buf);
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}
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rc = pmbus_do_probe(client, &crps_info);
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if (rc)
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return dev_err_probe(dev, rc, "Failed to probe\n");
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return 0;
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}
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static const struct of_device_id crps_of_match[] = {
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{
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.compatible = "intel,crps185",
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},
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{}
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};
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MODULE_DEVICE_TABLE(of, crps_of_match);
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static struct i2c_driver crps_driver = {
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.driver = {
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.name = "crps",
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.of_match_table = crps_of_match,
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},
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.probe = crps_probe,
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.id_table = crps_id,
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};
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module_i2c_driver(crps_driver);
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MODULE_AUTHOR("Ninad Palsule");
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MODULE_DESCRIPTION("PMBus driver for Intel Common Redundant power supplies");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS("PMBUS");

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