hwmon: (pmbus) Add driver for Infineon IR36021

The IR36021 is a dual‐loop digital multi‐phase buck controller.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20210301035954.16713-3-chris.packham@alliedtelesis.co.nz
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Chris Packham 2021-03-01 16:59:54 +13:00 committed by Guenter Roeck
parent 9cff4d8b32
commit e20a7198a2
5 changed files with 153 additions and 0 deletions

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@ -77,6 +77,7 @@ Hardware Monitoring Kernel Drivers
intel-m10-bmc-hwmon
ir35221
ir38064
ir36021
isl68137
it87
jc42

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@ -0,0 +1,63 @@
.. SPDX-License-Identifier: GPL-2.0
Kernel driver ir36021
=====================
Supported chips:
* Infineon IR36021
Prefix: ir36021
Addresses scanned: -
Datasheet: Publicly available at the Infineon website
https://www.infineon.com/dgdl/ir36021.pdf?fileId=5546d462533600a4015355d0aa2d1775
Authors:
- Chris Packham <chris.packham@alliedtelesis.co.nz>
Description
-----------
The IR36021 is a dualloop digital multiphase buck controller designed for
point of load applications.
Usage Notes
-----------
This driver does not probe for PMBus devices. You will have to instantiate
devices explicitly.
Sysfs attributes
----------------
======================= ===========================
curr1_label "iin"
curr1_input Measured input current
curr1_alarm Input fault alarm
curr2_label "iout1"
curr2_input Measured output current
curr2_alarm Output over-current alarm
in1_label "vin"
in1_input Measured input voltage
in1_alarm Input under-voltage alarm
in2_label "vout1"
in2_input Measured output voltage
in2_alarm Output over-voltage alarm
power1_label "pin"
power1_input Measured input power
power1_alarm Input under-voltage alarm
power2_label "pout1"
power2_input Measured output power
temp1_input Measured temperature
temp1_alarm Temperature alarm
temp2_input Measured other loop temperature
temp2_alarm Temperature alarm
======================= ===========================

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@ -84,6 +84,15 @@ config SENSORS_IR35221
This driver can also be built as a module. If so, the module will
be called ir35221.
config SENSORS_IR36021
tristate "Infineon IR36021"
help
If you say yes here you get hardware monitoring support for Infineon
IR36021.
This driver can also be built as a module. If so, the module will
be called ir36021.
config SENSORS_IR38064
tristate "Infineon IR38064"
help

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@ -11,6 +11,7 @@ obj-$(CONFIG_SENSORS_BEL_PFE) += bel-pfe.o
obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o
obj-$(CONFIG_SENSORS_IR35221) += ir35221.o
obj-$(CONFIG_SENSORS_IR36021) += ir36021.o
obj-$(CONFIG_SENSORS_IR38064) += ir38064.o
obj-$(CONFIG_SENSORS_IRPS5401) += irps5401.o
obj-$(CONFIG_SENSORS_ISL68137) += isl68137.o

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@ -0,0 +1,79 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Hardware monitoring driver for Infineon IR36021
*
* Copyright (c) 2021 Allied Telesis
*/
#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 ir36021_info = {
.pages = 1,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_VOLTAGE_OUT] = linear,
.format[PSC_CURRENT_IN] = linear,
.format[PSC_CURRENT_OUT] = linear,
.format[PSC_POWER] = linear,
.format[PSC_TEMPERATURE] = linear,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT
| PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT
| PMBUS_HAVE_PIN | PMBUS_HAVE_POUT
| PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2
| PMBUS_HAVE_STATUS_TEMP,
};
static int ir36021_probe(struct i2c_client *client)
{
u8 buf[I2C_SMBUS_BLOCK_MAX];
int ret;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE_DATA
| I2C_FUNC_SMBUS_READ_WORD_DATA
| I2C_FUNC_SMBUS_READ_BLOCK_DATA))
return -ENODEV;
ret = i2c_smbus_read_i2c_block_data(client, PMBUS_MFR_MODEL, 2, buf);
if (ret < 0) {
dev_err(&client->dev, "Failed to read PMBUS_MFR_MODEL\n");
return ret;
}
if (ret != 2 || buf[0] != 0x01 || buf[1] != 0x2d) {
dev_err(&client->dev, "MFR_MODEL unrecognised\n");
return -ENODEV;
}
return pmbus_do_probe(client, &ir36021_info);
}
static const struct i2c_device_id ir36021_id[] = {
{ "ir36021", 0 },
{},
};
MODULE_DEVICE_TABLE(i2c, ir36021_id);
static const struct of_device_id __maybe_unused ir36021_of_id[] = {
{ .compatible = "infineon,ir36021" },
{},
};
MODULE_DEVICE_TABLE(of, ir36021_of_id);
static struct i2c_driver ir36021_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "ir36021",
.of_match_table = of_match_ptr(ir36021_of_id),
},
.probe_new = ir36021_probe,
.id_table = ir36021_id,
};
module_i2c_driver(ir36021_driver);
MODULE_AUTHOR("Chris Packham <chris.packham@alliedtelesis.co.nz>");
MODULE_DESCRIPTION("PMBus driver for Infineon IR36021");
MODULE_LICENSE("GPL");