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80 lines
2.0 KiB
80 lines
2.0 KiB
// 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 <[email protected]>"); |
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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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