341 строка
8.4 KiB
C
341 строка
8.4 KiB
C
/*
|
|
* Hardware monitoring driver for LM25066 / LM5064 / LM5066
|
|
*
|
|
* 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/slab.h>
|
|
#include <linux/i2c.h>
|
|
#include "pmbus.h"
|
|
|
|
enum chips { lm25066, lm5064, lm5066 };
|
|
|
|
#define LM25066_READ_VAUX 0xd0
|
|
#define LM25066_MFR_READ_IIN 0xd1
|
|
#define LM25066_MFR_READ_PIN 0xd2
|
|
#define LM25066_MFR_IIN_OC_WARN_LIMIT 0xd3
|
|
#define LM25066_MFR_PIN_OP_WARN_LIMIT 0xd4
|
|
#define LM25066_READ_PIN_PEAK 0xd5
|
|
#define LM25066_CLEAR_PIN_PEAK 0xd6
|
|
#define LM25066_DEVICE_SETUP 0xd9
|
|
#define LM25066_READ_AVG_VIN 0xdc
|
|
#define LM25066_READ_AVG_VOUT 0xdd
|
|
#define LM25066_READ_AVG_IIN 0xde
|
|
#define LM25066_READ_AVG_PIN 0xdf
|
|
|
|
#define LM25066_DEV_SETUP_CL (1 << 4) /* Current limit */
|
|
|
|
struct lm25066_data {
|
|
int id;
|
|
struct pmbus_driver_info info;
|
|
};
|
|
|
|
#define to_lm25066_data(x) container_of(x, struct lm25066_data, info)
|
|
|
|
static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
|
|
{
|
|
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
|
|
const struct lm25066_data *data = to_lm25066_data(info);
|
|
int ret;
|
|
|
|
if (page > 1)
|
|
return -EINVAL;
|
|
|
|
/* Map READ_VAUX into READ_VOUT register on page 1 */
|
|
if (page == 1) {
|
|
switch (reg) {
|
|
case PMBUS_READ_VOUT:
|
|
ret = pmbus_read_word_data(client, 0,
|
|
LM25066_READ_VAUX);
|
|
if (ret < 0)
|
|
break;
|
|
/* Adjust returned value to match VOUT coefficients */
|
|
switch (data->id) {
|
|
case lm25066:
|
|
/* VOUT: 4.54 mV VAUX: 283.2 uV LSB */
|
|
ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
|
|
break;
|
|
case lm5064:
|
|
/* VOUT: 4.53 mV VAUX: 700 uV LSB */
|
|
ret = DIV_ROUND_CLOSEST(ret * 70, 453);
|
|
break;
|
|
case lm5066:
|
|
/* VOUT: 2.18 mV VAUX: 725 uV LSB */
|
|
ret = DIV_ROUND_CLOSEST(ret * 725, 2180);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
/* No other valid registers on page 1 */
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
switch (reg) {
|
|
case PMBUS_READ_IIN:
|
|
ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_IIN);
|
|
break;
|
|
case PMBUS_READ_PIN:
|
|
ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_PIN);
|
|
break;
|
|
case PMBUS_IIN_OC_WARN_LIMIT:
|
|
ret = pmbus_read_word_data(client, 0,
|
|
LM25066_MFR_IIN_OC_WARN_LIMIT);
|
|
break;
|
|
case PMBUS_PIN_OP_WARN_LIMIT:
|
|
ret = pmbus_read_word_data(client, 0,
|
|
LM25066_MFR_PIN_OP_WARN_LIMIT);
|
|
break;
|
|
case PMBUS_VIRT_READ_VIN_AVG:
|
|
ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VIN);
|
|
break;
|
|
case PMBUS_VIRT_READ_VOUT_AVG:
|
|
ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VOUT);
|
|
break;
|
|
case PMBUS_VIRT_READ_IIN_AVG:
|
|
ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_IIN);
|
|
break;
|
|
case PMBUS_VIRT_READ_PIN_AVG:
|
|
ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_PIN);
|
|
break;
|
|
case PMBUS_VIRT_READ_PIN_MAX:
|
|
ret = pmbus_read_word_data(client, 0, LM25066_READ_PIN_PEAK);
|
|
break;
|
|
case PMBUS_VIRT_RESET_PIN_HISTORY:
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
ret = -ENODATA;
|
|
break;
|
|
}
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
|
|
u16 word)
|
|
{
|
|
int ret;
|
|
|
|
if (page > 1)
|
|
return -EINVAL;
|
|
|
|
switch (reg) {
|
|
case PMBUS_IIN_OC_WARN_LIMIT:
|
|
ret = pmbus_write_word_data(client, 0,
|
|
LM25066_MFR_IIN_OC_WARN_LIMIT,
|
|
word);
|
|
break;
|
|
case PMBUS_PIN_OP_WARN_LIMIT:
|
|
ret = pmbus_write_word_data(client, 0,
|
|
LM25066_MFR_PIN_OP_WARN_LIMIT,
|
|
word);
|
|
break;
|
|
case PMBUS_VIRT_RESET_PIN_HISTORY:
|
|
ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);
|
|
break;
|
|
default:
|
|
ret = -ENODATA;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int lm25066_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
int config;
|
|
int ret;
|
|
struct lm25066_data *data;
|
|
struct pmbus_driver_info *info;
|
|
|
|
if (!i2c_check_functionality(client->adapter,
|
|
I2C_FUNC_SMBUS_READ_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
data = kzalloc(sizeof(struct lm25066_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);
|
|
if (config < 0) {
|
|
ret = config;
|
|
goto err_mem;
|
|
}
|
|
|
|
data->id = id->driver_data;
|
|
info = &data->info;
|
|
|
|
info->pages = 2;
|
|
info->format[PSC_VOLTAGE_IN] = direct;
|
|
info->format[PSC_VOLTAGE_OUT] = direct;
|
|
info->format[PSC_CURRENT_IN] = direct;
|
|
info->format[PSC_TEMPERATURE] = direct;
|
|
info->format[PSC_POWER] = direct;
|
|
|
|
info->m[PSC_TEMPERATURE] = 16;
|
|
info->b[PSC_TEMPERATURE] = 0;
|
|
info->R[PSC_TEMPERATURE] = 0;
|
|
|
|
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT
|
|
| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN
|
|
| PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
|
|
info->func[1] = PMBUS_HAVE_VOUT;
|
|
|
|
info->read_word_data = lm25066_read_word_data;
|
|
info->write_word_data = lm25066_write_word_data;
|
|
|
|
switch (id->driver_data) {
|
|
case lm25066:
|
|
info->m[PSC_VOLTAGE_IN] = 22070;
|
|
info->b[PSC_VOLTAGE_IN] = 0;
|
|
info->R[PSC_VOLTAGE_IN] = -2;
|
|
info->m[PSC_VOLTAGE_OUT] = 22070;
|
|
info->b[PSC_VOLTAGE_OUT] = 0;
|
|
info->R[PSC_VOLTAGE_OUT] = -2;
|
|
|
|
if (config & LM25066_DEV_SETUP_CL) {
|
|
info->m[PSC_CURRENT_IN] = 6852;
|
|
info->b[PSC_CURRENT_IN] = 0;
|
|
info->R[PSC_CURRENT_IN] = -2;
|
|
info->m[PSC_POWER] = 369;
|
|
info->b[PSC_POWER] = 0;
|
|
info->R[PSC_POWER] = -2;
|
|
} else {
|
|
info->m[PSC_CURRENT_IN] = 13661;
|
|
info->b[PSC_CURRENT_IN] = 0;
|
|
info->R[PSC_CURRENT_IN] = -2;
|
|
info->m[PSC_POWER] = 736;
|
|
info->b[PSC_POWER] = 0;
|
|
info->R[PSC_POWER] = -2;
|
|
}
|
|
break;
|
|
case lm5064:
|
|
info->m[PSC_VOLTAGE_IN] = 22075;
|
|
info->b[PSC_VOLTAGE_IN] = 0;
|
|
info->R[PSC_VOLTAGE_IN] = -2;
|
|
info->m[PSC_VOLTAGE_OUT] = 22075;
|
|
info->b[PSC_VOLTAGE_OUT] = 0;
|
|
info->R[PSC_VOLTAGE_OUT] = -2;
|
|
|
|
if (config & LM25066_DEV_SETUP_CL) {
|
|
info->m[PSC_CURRENT_IN] = 6713;
|
|
info->b[PSC_CURRENT_IN] = 0;
|
|
info->R[PSC_CURRENT_IN] = -2;
|
|
info->m[PSC_POWER] = 3619;
|
|
info->b[PSC_POWER] = 0;
|
|
info->R[PSC_POWER] = -3;
|
|
} else {
|
|
info->m[PSC_CURRENT_IN] = 13426;
|
|
info->b[PSC_CURRENT_IN] = 0;
|
|
info->R[PSC_CURRENT_IN] = -2;
|
|
info->m[PSC_POWER] = 7238;
|
|
info->b[PSC_POWER] = 0;
|
|
info->R[PSC_POWER] = -3;
|
|
}
|
|
break;
|
|
case lm5066:
|
|
info->m[PSC_VOLTAGE_IN] = 4587;
|
|
info->b[PSC_VOLTAGE_IN] = 0;
|
|
info->R[PSC_VOLTAGE_IN] = -2;
|
|
info->m[PSC_VOLTAGE_OUT] = 4587;
|
|
info->b[PSC_VOLTAGE_OUT] = 0;
|
|
info->R[PSC_VOLTAGE_OUT] = -2;
|
|
|
|
if (config & LM25066_DEV_SETUP_CL) {
|
|
info->m[PSC_CURRENT_IN] = 10753;
|
|
info->b[PSC_CURRENT_IN] = 0;
|
|
info->R[PSC_CURRENT_IN] = -2;
|
|
info->m[PSC_POWER] = 1204;
|
|
info->b[PSC_POWER] = 0;
|
|
info->R[PSC_POWER] = -3;
|
|
} else {
|
|
info->m[PSC_CURRENT_IN] = 5405;
|
|
info->b[PSC_CURRENT_IN] = 0;
|
|
info->R[PSC_CURRENT_IN] = -2;
|
|
info->m[PSC_POWER] = 605;
|
|
info->b[PSC_POWER] = 0;
|
|
info->R[PSC_POWER] = -3;
|
|
}
|
|
break;
|
|
default:
|
|
ret = -ENODEV;
|
|
goto err_mem;
|
|
}
|
|
|
|
ret = pmbus_do_probe(client, id, info);
|
|
if (ret)
|
|
goto err_mem;
|
|
return 0;
|
|
|
|
err_mem:
|
|
kfree(data);
|
|
return ret;
|
|
}
|
|
|
|
static int lm25066_remove(struct i2c_client *client)
|
|
{
|
|
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
|
|
const struct lm25066_data *data = to_lm25066_data(info);
|
|
int ret;
|
|
|
|
ret = pmbus_do_remove(client);
|
|
kfree(data);
|
|
return ret;
|
|
}
|
|
|
|
static const struct i2c_device_id lm25066_id[] = {
|
|
{"lm25066", lm25066},
|
|
{"lm5064", lm5064},
|
|
{"lm5066", lm5066},
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, lm25066_id);
|
|
|
|
/* This is the driver that will be inserted */
|
|
static struct i2c_driver lm25066_driver = {
|
|
.driver = {
|
|
.name = "lm25066",
|
|
},
|
|
.probe = lm25066_probe,
|
|
.remove = lm25066_remove,
|
|
.id_table = lm25066_id,
|
|
};
|
|
|
|
static int __init lm25066_init(void)
|
|
{
|
|
return i2c_add_driver(&lm25066_driver);
|
|
}
|
|
|
|
static void __exit lm25066_exit(void)
|
|
{
|
|
i2c_del_driver(&lm25066_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Guenter Roeck");
|
|
MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066");
|
|
MODULE_LICENSE("GPL");
|
|
module_init(lm25066_init);
|
|
module_exit(lm25066_exit);
|