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/*
* Hardware monitoring driver for Texas Instruments TPS53679
*
* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
* Copyright (c) 2017 Vadim Pasternak <vadimp@mellanox.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "pmbus.h"
#define TPS53679_PROT_VR12_5MV 0x01 /* VR12.0 mode, 5-mV DAC */
#define TPS53679_PROT_VR12_5_10MV 0x02 /* VR12.5 mode, 10-mV DAC */
#define TPS53679_PROT_VR13_10MV 0x04 /* VR13.0 mode, 10-mV DAC */
#define TPS53679_PROT_IMVP8_5MV 0x05 /* IMVP8 mode, 5-mV DAC */
#define TPS53679_PROT_VR13_5MV 0x07 /* VR13.0 mode, 5-mV DAC */
#define TPS53679_PAGE_NUM 2
static int tps53679_identify(struct i2c_client *client,
struct pmbus_driver_info *info)
{
u8 vout_params;
int ret;
/* Read the register with VOUT scaling value.*/
ret = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
if (ret < 0)
return ret;
vout_params = ret & GENMASK(4, 0);
switch (vout_params) {
case TPS53679_PROT_VR13_10MV:
case TPS53679_PROT_VR12_5_10MV:
info->vrm_version = vr13;
break;
case TPS53679_PROT_VR13_5MV:
case TPS53679_PROT_VR12_5MV:
case TPS53679_PROT_IMVP8_5MV:
info->vrm_version = vr12;
break;
default:
return -EINVAL;
}
return 0;
}
static struct pmbus_driver_info tps53679_info = {
.pages = TPS53679_PAGE_NUM,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_VOLTAGE_OUT] = vid,
.format[PSC_TEMPERATURE] = linear,
.format[PSC_CURRENT_OUT] = linear,
.format[PSC_POWER] = linear,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_POUT,
.func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_POUT,
.identify = tps53679_identify,
};
static int tps53679_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct pmbus_driver_info *info;
info = devm_kmemdup(&client->dev, &tps53679_info, sizeof(*info),
GFP_KERNEL);
if (!info)
return -ENOMEM;
return pmbus_do_probe(client, id, info);
}
static const struct i2c_device_id tps53679_id[] = {
{"tps53679", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, tps53679_id);
static const struct of_device_id tps53679_of_match[] = {
{.compatible = "ti,tps53679"},
{}
};
MODULE_DEVICE_TABLE(of, tps53679_of_match);
static struct i2c_driver tps53679_driver = {
.driver = {
.name = "tps53679",
.of_match_table = of_match_ptr(tps53679_of_match),
},
.probe = tps53679_probe,
.remove = pmbus_do_remove,
.id_table = tps53679_id,
};
module_i2c_driver(tps53679_driver);
MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
MODULE_DESCRIPTION("PMBus driver for Texas Instruments TPS53679");
MODULE_LICENSE("GPL");
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