114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
|
/*
|
||
|
|
* 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)
|
||
|
|
{
|
||
|
|
return pmbus_do_probe(client, id, &tps53679_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");
|