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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Hardware monitoring driver for Infineon IR360214 *5 * Copyright (c) 2021 Allied Telesis6 */7#include <linux/err.h>8#include <linux/i2c.h>9#include <linux/init.h>10#include <linux/kernel.h>11#include <linux/module.h>12#include "pmbus.h"13 14static struct pmbus_driver_info ir36021_info = {15 .pages = 1,16 .format[PSC_VOLTAGE_IN] = linear,17 .format[PSC_VOLTAGE_OUT] = linear,18 .format[PSC_CURRENT_IN] = linear,19 .format[PSC_CURRENT_OUT] = linear,20 .format[PSC_POWER] = linear,21 .format[PSC_TEMPERATURE] = linear,22 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT23 | PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT24 | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT25 | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP226 | PMBUS_HAVE_STATUS_TEMP,27};28 29static int ir36021_probe(struct i2c_client *client)30{31 u8 buf[I2C_SMBUS_BLOCK_MAX];32 int ret;33 34 if (!i2c_check_functionality(client->adapter,35 I2C_FUNC_SMBUS_READ_BYTE_DATA36 | I2C_FUNC_SMBUS_READ_WORD_DATA37 | I2C_FUNC_SMBUS_READ_BLOCK_DATA))38 return -ENODEV;39 40 ret = i2c_smbus_read_i2c_block_data(client, PMBUS_MFR_MODEL, 2, buf);41 if (ret < 0) {42 dev_err(&client->dev, "Failed to read PMBUS_MFR_MODEL\n");43 return ret;44 }45 if (ret != 2 || buf[0] != 0x01 || buf[1] != 0x2d) {46 dev_err(&client->dev, "MFR_MODEL unrecognised\n");47 return -ENODEV;48 }49 50 return pmbus_do_probe(client, &ir36021_info);51}52 53static const struct i2c_device_id ir36021_id[] = {54 { "ir36021" },55 {},56};57MODULE_DEVICE_TABLE(i2c, ir36021_id);58 59static const struct of_device_id __maybe_unused ir36021_of_id[] = {60 { .compatible = "infineon,ir36021" },61 {},62};63MODULE_DEVICE_TABLE(of, ir36021_of_id);64 65static struct i2c_driver ir36021_driver = {66 .driver = {67 .name = "ir36021",68 .of_match_table = of_match_ptr(ir36021_of_id),69 },70 .probe = ir36021_probe,71 .id_table = ir36021_id,72};73 74module_i2c_driver(ir36021_driver);75 76MODULE_AUTHOR("Chris Packham <chris.packham@alliedtelesis.co.nz>");77MODULE_DESCRIPTION("PMBus driver for Infineon IR36021");78MODULE_LICENSE("GPL");79MODULE_IMPORT_NS(PMBUS);80