mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 09:16:38 +07:00
1061d8518f
In VID mode, output voltages are measured and reported as VID values, and have to be converted to voltages using VID conversion tables or functions. Support is added for VR11 only at this time. This patch enables support for PMBus devices supporting VID VR11 based output voltage selection such as NCP4200 and NCP4208. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
200 lines
6.2 KiB
C
200 lines
6.2 KiB
C
/*
|
|
* Hardware monitoring driver for Maxim MAX34440/MAX34441
|
|
*
|
|
* Copyright (c) 2011 Ericsson AB.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/err.h>
|
|
#include <linux/i2c.h>
|
|
#include "pmbus.h"
|
|
|
|
enum chips { max34440, max34441 };
|
|
|
|
#define MAX34440_STATUS_OC_WARN (1 << 0)
|
|
#define MAX34440_STATUS_OC_FAULT (1 << 1)
|
|
#define MAX34440_STATUS_OT_FAULT (1 << 5)
|
|
#define MAX34440_STATUS_OT_WARN (1 << 6)
|
|
|
|
static int max34440_read_byte_data(struct i2c_client *client, int page, int reg)
|
|
{
|
|
int ret;
|
|
int mfg_status;
|
|
|
|
ret = pmbus_set_page(client, page);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
switch (reg) {
|
|
case PMBUS_STATUS_IOUT:
|
|
mfg_status = pmbus_read_word_data(client, 0,
|
|
PMBUS_STATUS_MFR_SPECIFIC);
|
|
if (mfg_status < 0)
|
|
return mfg_status;
|
|
if (mfg_status & MAX34440_STATUS_OC_WARN)
|
|
ret |= PB_IOUT_OC_WARNING;
|
|
if (mfg_status & MAX34440_STATUS_OC_FAULT)
|
|
ret |= PB_IOUT_OC_FAULT;
|
|
break;
|
|
case PMBUS_STATUS_TEMPERATURE:
|
|
mfg_status = pmbus_read_word_data(client, 0,
|
|
PMBUS_STATUS_MFR_SPECIFIC);
|
|
if (mfg_status < 0)
|
|
return mfg_status;
|
|
if (mfg_status & MAX34440_STATUS_OT_WARN)
|
|
ret |= PB_TEMP_OT_WARNING;
|
|
if (mfg_status & MAX34440_STATUS_OT_FAULT)
|
|
ret |= PB_TEMP_OT_FAULT;
|
|
break;
|
|
default:
|
|
ret = -ENODATA;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static struct pmbus_driver_info max34440_info[] = {
|
|
[max34440] = {
|
|
.pages = 14,
|
|
.format[PSC_VOLTAGE_IN] = direct,
|
|
.format[PSC_VOLTAGE_OUT] = direct,
|
|
.format[PSC_TEMPERATURE] = direct,
|
|
.format[PSC_CURRENT_OUT] = direct,
|
|
.m[PSC_VOLTAGE_IN] = 1,
|
|
.b[PSC_VOLTAGE_IN] = 0,
|
|
.R[PSC_VOLTAGE_IN] = 3, /* R = 0 in datasheet reflects mV */
|
|
.m[PSC_VOLTAGE_OUT] = 1,
|
|
.b[PSC_VOLTAGE_OUT] = 0,
|
|
.R[PSC_VOLTAGE_OUT] = 3, /* R = 0 in datasheet reflects mV */
|
|
.m[PSC_CURRENT_OUT] = 1,
|
|
.b[PSC_CURRENT_OUT] = 0,
|
|
.R[PSC_CURRENT_OUT] = 3, /* R = 0 in datasheet reflects mA */
|
|
.m[PSC_TEMPERATURE] = 1,
|
|
.b[PSC_TEMPERATURE] = 0,
|
|
.R[PSC_TEMPERATURE] = 2,
|
|
.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.read_byte_data = max34440_read_byte_data,
|
|
},
|
|
[max34441] = {
|
|
.pages = 12,
|
|
.format[PSC_VOLTAGE_IN] = direct,
|
|
.format[PSC_VOLTAGE_OUT] = direct,
|
|
.format[PSC_TEMPERATURE] = direct,
|
|
.format[PSC_CURRENT_OUT] = direct,
|
|
.format[PSC_FAN] = direct,
|
|
.m[PSC_VOLTAGE_IN] = 1,
|
|
.b[PSC_VOLTAGE_IN] = 0,
|
|
.R[PSC_VOLTAGE_IN] = 3,
|
|
.m[PSC_VOLTAGE_OUT] = 1,
|
|
.b[PSC_VOLTAGE_OUT] = 0,
|
|
.R[PSC_VOLTAGE_OUT] = 3,
|
|
.m[PSC_CURRENT_OUT] = 1,
|
|
.b[PSC_CURRENT_OUT] = 0,
|
|
.R[PSC_CURRENT_OUT] = 3,
|
|
.m[PSC_TEMPERATURE] = 1,
|
|
.b[PSC_TEMPERATURE] = 0,
|
|
.R[PSC_TEMPERATURE] = 2,
|
|
.m[PSC_FAN] = 1,
|
|
.b[PSC_FAN] = 0,
|
|
.R[PSC_FAN] = 0,
|
|
.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
|
|
| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
|
|
.func[5] = PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
|
|
.func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
|
|
.read_byte_data = max34440_read_byte_data,
|
|
},
|
|
};
|
|
|
|
static int max34440_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
return pmbus_do_probe(client, id, &max34440_info[id->driver_data]);
|
|
}
|
|
|
|
static int max34440_remove(struct i2c_client *client)
|
|
{
|
|
return pmbus_do_remove(client);
|
|
}
|
|
|
|
static const struct i2c_device_id max34440_id[] = {
|
|
{"max34440", max34440},
|
|
{"max34441", max34441},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, max34440_id);
|
|
|
|
/* This is the driver that will be inserted */
|
|
static struct i2c_driver max34440_driver = {
|
|
.driver = {
|
|
.name = "max34440",
|
|
},
|
|
.probe = max34440_probe,
|
|
.remove = max34440_remove,
|
|
.id_table = max34440_id,
|
|
};
|
|
|
|
static int __init max34440_init(void)
|
|
{
|
|
return i2c_add_driver(&max34440_driver);
|
|
}
|
|
|
|
static void __exit max34440_exit(void)
|
|
{
|
|
i2c_del_driver(&max34440_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Guenter Roeck");
|
|
MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441");
|
|
MODULE_LICENSE("GPL");
|
|
module_init(max34440_init);
|
|
module_exit(max34440_exit);
|