117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
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/*
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* Copyright (C) 2017 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include "pmbus.h"
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enum max31785_regs {
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MFR_REVISION = 0x9b,
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};
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#define MAX31785_NR_PAGES 23
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#define MAX31785_FAN_FUNCS \
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(PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12)
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#define MAX31785_TEMP_FUNCS \
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(PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP)
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#define MAX31785_VOUT_FUNCS \
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(PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT)
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static const struct pmbus_driver_info max31785_info = {
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.pages = MAX31785_NR_PAGES,
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/* RPM */
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.format[PSC_FAN] = direct,
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.m[PSC_FAN] = 1,
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.b[PSC_FAN] = 0,
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.R[PSC_FAN] = 0,
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.func[0] = MAX31785_FAN_FUNCS,
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.func[1] = MAX31785_FAN_FUNCS,
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.func[2] = MAX31785_FAN_FUNCS,
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.func[3] = MAX31785_FAN_FUNCS,
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.func[4] = MAX31785_FAN_FUNCS,
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.func[5] = MAX31785_FAN_FUNCS,
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.format[PSC_TEMPERATURE] = direct,
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.m[PSC_TEMPERATURE] = 1,
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.b[PSC_TEMPERATURE] = 0,
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.R[PSC_TEMPERATURE] = 2,
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.func[6] = MAX31785_TEMP_FUNCS,
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.func[7] = MAX31785_TEMP_FUNCS,
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.func[8] = MAX31785_TEMP_FUNCS,
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.func[9] = MAX31785_TEMP_FUNCS,
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.func[10] = MAX31785_TEMP_FUNCS,
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.func[11] = MAX31785_TEMP_FUNCS,
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.func[12] = MAX31785_TEMP_FUNCS,
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.func[13] = MAX31785_TEMP_FUNCS,
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.func[14] = MAX31785_TEMP_FUNCS,
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.func[15] = MAX31785_TEMP_FUNCS,
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.func[16] = MAX31785_TEMP_FUNCS,
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.format[PSC_VOLTAGE_OUT] = direct,
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.m[PSC_VOLTAGE_OUT] = 1,
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.b[PSC_VOLTAGE_OUT] = 0,
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.R[PSC_VOLTAGE_OUT] = 0,
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.func[17] = MAX31785_VOUT_FUNCS,
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.func[18] = MAX31785_VOUT_FUNCS,
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.func[19] = MAX31785_VOUT_FUNCS,
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.func[20] = MAX31785_VOUT_FUNCS,
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.func[21] = MAX31785_VOUT_FUNCS,
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.func[22] = MAX31785_VOUT_FUNCS,
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};
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static int max31785_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct device *dev = &client->dev;
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struct pmbus_driver_info *info;
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s64 ret;
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info = devm_kzalloc(dev, sizeof(struct pmbus_driver_info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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*info = max31785_info;
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 255);
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if (ret < 0)
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return ret;
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return pmbus_do_probe(client, id, info);
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}
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static const struct i2c_device_id max31785_id[] = {
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{ "max31785", 0 },
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{ "max31785a", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, max31785_id);
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static struct i2c_driver max31785_driver = {
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.driver = {
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.name = "max31785",
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},
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.probe = max31785_probe,
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.remove = pmbus_do_remove,
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.id_table = max31785_id,
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};
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module_i2c_driver(max31785_driver);
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MODULE_AUTHOR("Andrew Jeffery <andrew@aj.id.au>");
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MODULE_DESCRIPTION("PMBus driver for the Maxim MAX31785");
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MODULE_LICENSE("GPL");
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