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: Maxim Sloyko <maxims@google.com> Signed-off-by: Patrick Venture <venture@google.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>hifive-unleashed-5.2
Maxim Sloyko
Guenter Roeck
parent
c49b7b3981
commit
00669d196c
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@ -0,0 +1,64 @@
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Kernel driver ir38064
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=====================
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Supported chips:
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* Infineon IR38064
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Prefix: 'ir38064'
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Addresses scanned: -
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Datasheet: Publicly available at the Infineon webiste
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https://www.infineon.com/dgdl/Infineon-IR38064MTRPBF-DS-v03_07-EN.pdf?fileId=5546d462584d1d4a0158db0d9efb67ca
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Datasheet is not publicly available.
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Authors:
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Maxim Sloyko <maxims@google.com>
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Patrick Venture <venture@google.com>
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Description
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-----------
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IR38064 is a Single-input Voltage, Synchronous Buck Regulator, DC-DC Converter.
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Usage Notes
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-----------
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This driver does not probe for PMBus devices. You will have to instantiate
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devices explicitly.
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Sysfs attributes
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----------------
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curr1_label "iout1"
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curr1_input Measured output current
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curr1_crit Critical maximum current
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curr1_crit_alarm Current critical high alarm
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curr1_max Maximum current
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curr1_max_alarm Current high alarm
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in1_label "vin"
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in1_input Measured input voltage
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in1_crit Critical maximum input voltage
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in1_crit_alarm Input voltage critical high alarm
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in1_min Minimum input voltage
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in1_min_alarm Input voltage low alarm
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in2_label "vout1"
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in2_input Measured output voltage
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in2_lcrit Critical minimum output voltage
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in2_lcrit_alarm Output voltage critical low alarm
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in2_crit Critical maximum output voltage
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in2_crit_alarm Output voltage critical high alarm
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in2_max Maximum output voltage
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in2_max_alarm Output voltage high alarm
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in2_min Minimum output voltage
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in2_min_alarm Output voltage low alarm
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power1_label "pout1"
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power1_input Measured output power
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temp1_input Measured temperature
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temp1_crit Critical high temperature
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temp1_crit_alarm Chip temperature critical high alarm
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temp1_max Maximum temperature
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temp1_max_alarm Chip temperature high alarm
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@ -54,6 +54,15 @@ config SENSORS_IR35221
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This driver can also be built as a module. If so, the module will
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be called ir35521.
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config SENSORS_IR38064
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tristate "Infineon IR38064"
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help
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If you say yes here you get hardware monitoring support for Infineon
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IR38064.
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This driver can also be built as a module. If so, the module will
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be called ir38064.
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config SENSORS_LM25066
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tristate "National Semiconductor LM25066 and compatibles"
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help
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@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
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obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o
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obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
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obj-$(CONFIG_SENSORS_IR35221) += ir35221.o
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obj-$(CONFIG_SENSORS_IR38064) += ir38064.o
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obj-$(CONFIG_SENSORS_LM25066) += lm25066.o
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obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o
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obj-$(CONFIG_SENSORS_LTC3815) += ltc3815.o
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@ -0,0 +1,65 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Hardware monitoring driver for Infineon IR38064
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*
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* Copyright (c) 2017 Google Inc
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*
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* VOUT_MODE is not supported by the device. The driver fakes VOUT linear16
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* mode with exponent value -8 as direct mode with m=256/b=0/R=0.
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*
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* The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however
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* this driver does not currently support them.
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "pmbus.h"
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static struct pmbus_driver_info ir38064_info = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = direct,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_POWER] = linear,
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.format[PSC_TEMPERATURE] = linear,
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.m[PSC_VOLTAGE_OUT] = 256,
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.b[PSC_VOLTAGE_OUT] = 0,
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.R[PSC_VOLTAGE_OUT] = 0,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
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| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
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| PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
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| PMBUS_HAVE_POUT,
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};
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static int ir38064_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, &ir38064_info);
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}
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static const struct i2c_device_id ir38064_id[] = {
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{"ir38064", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, ir38064_id);
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/* This is the driver that will be inserted */
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static struct i2c_driver ir38064_driver = {
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.driver = {
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.name = "ir38064",
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},
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.probe = ir38064_probe,
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.remove = pmbus_do_remove,
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.id_table = ir38064_id,
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};
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module_i2c_driver(ir38064_driver);
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MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");
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MODULE_DESCRIPTION("PMBus driver for Infineon IR38064");
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MODULE_LICENSE("GPL");
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