hwmon: (pmbus) Add support for MAX20751
MAX20751 is a multiphase power controller with internal buck converter. It uses VR12.0 to report the output voltage. This requires an explicit driver, since the VR version can not be auto-detected. The chip supports a manufacturer specific command to fine-tune the output voltage. This command is not currently supported. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Documentation/hwmon/max20751
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Documentation/hwmon/max20751
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Kernel driver max20751
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======================
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Supported chips:
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* maxim MAX20751
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Prefix: 'max20751'
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Addresses scanned: -
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX20751.pdf
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Application note: http://pdfserv.maximintegrated.com/en/an/AN5941.pdf
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Author: Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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This driver supports MAX20751 Multiphase Master with PMBus Interface
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and Internal Buck Converter.
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The driver is a client driver to the core PMBus driver.
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Please see Documentation/hwmon/pmbus 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 for
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details.
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Platform data support
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---------------------
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The driver supports standard PMBus driver platform data.
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Sysfs entries
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-------------
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The following attributes are supported.
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in1_label "vin1"
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in1_input Measured voltage.
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in1_min Minimum input voltage.
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in1_max Maximum input voltage.
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in1_lcrit Critical minimum input voltage.
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in1_crit Critical maximum input voltage.
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in1_min_alarm Input voltage low alarm.
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in1_lcrit_alarm Input voltage critical low alarm.
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in1_min_alarm Input voltage low alarm.
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in1_max_alarm Input voltage high alarm.
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in2_label "vout1"
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in2_input Measured voltage.
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in2_min Minimum output voltage.
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in2_max Maximum output voltage.
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in2_lcrit Critical minimum output voltage.
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in2_crit Critical maximum output voltage.
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in2_min_alarm Output voltage low alarm.
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in2_lcrit_alarm Output voltage critical low alarm.
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in2_min_alarm Output voltage low alarm.
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in2_max_alarm Output voltage high alarm.
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curr1_input Measured output current.
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curr1_label "iout1"
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curr1_max Maximum output current.
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curr1_alarm Current high alarm.
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temp1_input Measured temperature.
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temp1_max Maximum temperature.
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temp1_crit Critical high temperature.
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temp1_max_alarm Chip temperature high alarm.
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temp1_crit_alarm Chip temperature critical high alarm.
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power1_input Output power.
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power1_label "pout1"
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@ -6539,6 +6539,13 @@ S: Maintained
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F: Documentation/hwmon/max16065
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F: drivers/hwmon/max16065.c
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MAX20751 HARDWARE MONITOR DRIVER
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M: Guenter Roeck <linux@roeck-us.net>
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L: lm-sensors@lm-sensors.org
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S: Maintained
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F: Documentation/hwmon/max20751
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F: drivers/hwmon/max20751.c
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MAX6650 HARDWARE MONITOR AND FAN CONTROLLER DRIVER
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M: "Hans J. Koch" <hjk@hansjkoch.de>
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L: lm-sensors@lm-sensors.org
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@ -73,6 +73,16 @@ config SENSORS_MAX16064
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This driver can also be built as a module. If so, the module will
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be called max16064.
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config SENSORS_MAX20751
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tristate "Maxim MAX20751"
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default n
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help
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If you say yes here you get hardware monitoring support for Maxim
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MAX20751.
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This driver can also be built as a module. If so, the module will
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be called max20751.
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config SENSORS_MAX34440
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tristate "Maxim MAX34440 and compatibles"
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default n
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@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o
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obj-$(CONFIG_SENSORS_LM25066) += lm25066.o
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obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o
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obj-$(CONFIG_SENSORS_MAX16064) += max16064.o
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obj-$(CONFIG_SENSORS_MAX20751) += max20751.o
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obj-$(CONFIG_SENSORS_MAX34440) += max34440.o
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obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
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obj-$(CONFIG_SENSORS_TPS40422) += tps40422.o
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64
drivers/hwmon/pmbus/max20751.c
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drivers/hwmon/pmbus/max20751.c
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/*
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* Hardware monitoring driver for Maxim MAX20751
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*
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* Copyright (c) 2015 Guenter Roeck
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include "pmbus.h"
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static struct pmbus_driver_info max20751_info = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = vid,
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.vrm_version = vr12,
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.format[PSC_TEMPERATURE] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_POWER] = linear,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
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PMBUS_HAVE_POUT,
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};
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static int max20751_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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return pmbus_do_probe(client, id, &max20751_info);
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}
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static const struct i2c_device_id max20751_id[] = {
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{"max20751", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, max20751_id);
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static struct i2c_driver max20751_driver = {
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.driver = {
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.name = "max20751",
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},
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.probe = max20751_probe,
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.remove = pmbus_do_remove,
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.id_table = max20751_id,
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};
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module_i2c_driver(max20751_driver);
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MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
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MODULE_DESCRIPTION("PMBus driver for Maxim MAX20751");
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MODULE_LICENSE("GPL");
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