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// 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" },
{},
};
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 = {
.driver = {
.name = "ir36021",
.of_match_table = of_match_ptr(ir36021_of_id),
},
.probe = 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");
MODULE_IMPORT_NS("PMBUS");
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