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

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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>
This commit is contained in:
Maxim Sloyko
2019-04-12 13:37:56 -07:00
committed by Guenter Roeck
parent c49b7b3981
commit 00669d196c
4 changed files with 139 additions and 0 deletions
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65
drivers/hwmon/pmbus/ir38064.c Normal file
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// 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");