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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", 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 <[email protected]>");
- MODULE_DESCRIPTION("PMBus driver for Infineon IR36021");
- MODULE_LICENSE("GPL");
- MODULE_IMPORT_NS(PMBUS);
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