// 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);