1f61cab8a7
MAX20751 is a multiphase power controller with internal buck converter. It uses VR12.0 to report the output voltage. This requires an explicit driver, since the VR version can not be auto-detected. The chip supports a manufacturer specific command to fine-tune the output voltage. This command is not currently supported. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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* Hardware monitoring driver for Maxim MAX20751
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*
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* Copyright (c) 2015 Guenter Roeck
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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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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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static struct pmbus_driver_info max20751_info = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = vid,
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.vrm_version = vr12,
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.format[PSC_TEMPERATURE] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_POWER] = linear,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
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PMBUS_HAVE_POUT,
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};
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static int max20751_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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return pmbus_do_probe(client, id, &max20751_info);
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}
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static const struct i2c_device_id max20751_id[] = {
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{"max20751", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, max20751_id);
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static struct i2c_driver max20751_driver = {
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.driver = {
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.name = "max20751",
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},
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.probe = max20751_probe,
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.remove = pmbus_do_remove,
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.id_table = max20751_id,
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};
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module_i2c_driver(max20751_driver);
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MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
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MODULE_DESCRIPTION("PMBus driver for Maxim MAX20751");
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MODULE_LICENSE("GPL");
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