81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Hardware monitoring driver for Infineon IR36021
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*
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* Copyright (c) 2021 Allied Telesis
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "pmbus.h"
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static struct pmbus_driver_info ir36021_info = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = linear,
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.format[PSC_CURRENT_IN] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_POWER] = linear,
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.format[PSC_TEMPERATURE] = linear,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT
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| PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT
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| PMBUS_HAVE_PIN | PMBUS_HAVE_POUT
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| PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2
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| PMBUS_HAVE_STATUS_TEMP,
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};
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static int ir36021_probe(struct i2c_client *client)
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{
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u8 buf[I2C_SMBUS_BLOCK_MAX];
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int ret;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_READ_BYTE_DATA
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| I2C_FUNC_SMBUS_READ_WORD_DATA
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| I2C_FUNC_SMBUS_READ_BLOCK_DATA))
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return -ENODEV;
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ret = i2c_smbus_read_i2c_block_data(client, PMBUS_MFR_MODEL, 2, buf);
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if (ret < 0) {
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dev_err(&client->dev, "Failed to read PMBUS_MFR_MODEL\n");
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return ret;
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}
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if (ret != 2 || buf[0] != 0x01 || buf[1] != 0x2d) {
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dev_err(&client->dev, "MFR_MODEL unrecognised\n");
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return -ENODEV;
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}
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return pmbus_do_probe(client, &ir36021_info);
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}
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static const struct i2c_device_id ir36021_id[] = {
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{ "ir36021", 0 },
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{},
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};
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MODULE_DEVICE_TABLE(i2c, ir36021_id);
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static const struct of_device_id __maybe_unused ir36021_of_id[] = {
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{ .compatible = "infineon,ir36021" },
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{},
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};
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MODULE_DEVICE_TABLE(of, ir36021_of_id);
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static struct i2c_driver ir36021_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = "ir36021",
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.of_match_table = of_match_ptr(ir36021_of_id),
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},
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.probe_new = ir36021_probe,
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.id_table = ir36021_id,
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};
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module_i2c_driver(ir36021_driver);
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MODULE_AUTHOR("Chris Packham <chris.packham@alliedtelesis.co.nz>");
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MODULE_DESCRIPTION("PMBus driver for Infineon IR36021");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS(PMBUS);
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