Commit 00669d19 authored by Maxim Sloyko's avatar Maxim Sloyko Committed by Guenter Roeck

hwmon: (pmbus/ir38064) Add driver for Infineon IR38064 Voltage Regulator

Add the pmbus driver for the Infineon ir38064 voltage regulator.

VOUT_MODE is not supported by the device.  The driver fakes linear16
mode with exponent value -8.

The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however
this driver does not enable them.
Signed-off-by: default avatarMaxim Sloyko <maxims@google.com>
Signed-off-by: default avatarPatrick Venture <venture@google.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent c49b7b39
Kernel driver ir38064
=====================
Supported chips:
* Infineon IR38064
Prefix: 'ir38064'
Addresses scanned: -
Datasheet: Publicly available at the Infineon webiste
https://www.infineon.com/dgdl/Infineon-IR38064MTRPBF-DS-v03_07-EN.pdf?fileId=5546d462584d1d4a0158db0d9efb67ca
Datasheet is not publicly available.
Authors:
Maxim Sloyko <maxims@google.com>
Patrick Venture <venture@google.com>
Description
-----------
IR38064 is a Single-input Voltage, Synchronous Buck Regulator, DC-DC Converter.
Usage Notes
-----------
This driver does not probe for PMBus devices. You will have to instantiate
devices explicitly.
Sysfs attributes
----------------
curr1_label "iout1"
curr1_input Measured output current
curr1_crit Critical maximum current
curr1_crit_alarm Current critical high alarm
curr1_max Maximum current
curr1_max_alarm Current high alarm
in1_label "vin"
in1_input Measured input voltage
in1_crit Critical maximum input voltage
in1_crit_alarm Input voltage critical high alarm
in1_min Minimum input voltage
in1_min_alarm Input voltage low alarm
in2_label "vout1"
in2_input Measured output voltage
in2_lcrit Critical minimum output voltage
in2_lcrit_alarm Output voltage critical low alarm
in2_crit Critical maximum output voltage
in2_crit_alarm Output voltage critical high alarm
in2_max Maximum output voltage
in2_max_alarm Output voltage high alarm
in2_min Minimum output voltage
in2_min_alarm Output voltage low alarm
power1_label "pout1"
power1_input Measured output power
temp1_input Measured temperature
temp1_crit Critical high temperature
temp1_crit_alarm Chip temperature critical high alarm
temp1_max Maximum temperature
temp1_max_alarm Chip temperature high alarm
......@@ -54,6 +54,15 @@ config SENSORS_IR35221
This driver can also be built as a module. If so, the module will
be called ir35521.
config SENSORS_IR38064
tristate "Infineon IR38064"
help
If you say yes here you get hardware monitoring support for Infineon
IR38064.
This driver can also be built as a module. If so, the module will
be called ir38064.
config SENSORS_LM25066
tristate "National Semiconductor LM25066 and compatibles"
help
......
......@@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o
obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
obj-$(CONFIG_SENSORS_IR35221) += ir35221.o
obj-$(CONFIG_SENSORS_IR38064) += ir38064.o
obj-$(CONFIG_SENSORS_LM25066) += lm25066.o
obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o
obj-$(CONFIG_SENSORS_LTC3815) += ltc3815.o
......
// SPDX-License-Identifier: GPL-2.0+
/*
* Hardware monitoring driver for Infineon IR38064
*
* Copyright (c) 2017 Google Inc
*
* VOUT_MODE is not supported by the device. The driver fakes VOUT linear16
* mode with exponent value -8 as direct mode with m=256/b=0/R=0.
*
* The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however
* this driver does not currently support them.
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "pmbus.h"
static struct pmbus_driver_info ir38064_info = {
.pages = 1,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_VOLTAGE_OUT] = direct,
.format[PSC_CURRENT_OUT] = linear,
.format[PSC_POWER] = linear,
.format[PSC_TEMPERATURE] = linear,
.m[PSC_VOLTAGE_OUT] = 256,
.b[PSC_VOLTAGE_OUT] = 0,
.R[PSC_VOLTAGE_OUT] = 0,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
| PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
| PMBUS_HAVE_POUT,
};
static int ir38064_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
return pmbus_do_probe(client, id, &ir38064_info);
}
static const struct i2c_device_id ir38064_id[] = {
{"ir38064", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, ir38064_id);
/* This is the driver that will be inserted */
static struct i2c_driver ir38064_driver = {
.driver = {
.name = "ir38064",
},
.probe = ir38064_probe,
.remove = pmbus_do_remove,
.id_table = ir38064_id,
};
module_i2c_driver(ir38064_driver);
MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");
MODULE_DESCRIPTION("PMBus driver for Infineon IR38064");
MODULE_LICENSE("GPL");
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