2011-03-17 14:16:01 -06:00
|
|
|
/*
|
|
|
|
* Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
|
|
|
|
* and Digital Power Monitor
|
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#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"
|
|
|
|
|
|
|
|
#define ADM1275_PMON_CONFIG 0xd4
|
|
|
|
|
|
|
|
#define ADM1275_VIN_VOUT_SELECT (1 << 6)
|
|
|
|
#define ADM1275_VRANGE (1 << 5)
|
|
|
|
|
|
|
|
static int adm1275_probe(struct i2c_client *client,
|
|
|
|
const struct i2c_device_id *id)
|
|
|
|
{
|
|
|
|
int config;
|
2011-06-30 03:30:03 -06:00
|
|
|
int ret;
|
2011-03-17 14:16:01 -06:00
|
|
|
struct pmbus_driver_info *info;
|
|
|
|
|
|
|
|
if (!i2c_check_functionality(client->adapter,
|
|
|
|
I2C_FUNC_SMBUS_READ_BYTE_DATA))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL);
|
|
|
|
if (!info)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
|
2011-06-30 03:30:03 -06:00
|
|
|
if (config < 0) {
|
|
|
|
ret = config;
|
|
|
|
goto err_mem;
|
|
|
|
}
|
2011-03-17 14:16:01 -06:00
|
|
|
|
|
|
|
info->pages = 1;
|
2011-06-25 12:21:49 -06:00
|
|
|
info->format[PSC_VOLTAGE_IN] = direct;
|
|
|
|
info->format[PSC_VOLTAGE_OUT] = direct;
|
|
|
|
info->format[PSC_CURRENT_OUT] = direct;
|
2011-07-14 15:18:03 -06:00
|
|
|
info->m[PSC_CURRENT_OUT] = 807;
|
2011-03-17 14:16:01 -06:00
|
|
|
info->b[PSC_CURRENT_OUT] = 20475;
|
|
|
|
info->R[PSC_CURRENT_OUT] = -1;
|
|
|
|
info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
|
|
|
|
|
|
|
|
if (config & ADM1275_VRANGE) {
|
2011-07-14 15:18:03 -06:00
|
|
|
info->m[PSC_VOLTAGE_IN] = 19199;
|
2011-03-17 14:16:01 -06:00
|
|
|
info->b[PSC_VOLTAGE_IN] = 0;
|
|
|
|
info->R[PSC_VOLTAGE_IN] = -2;
|
2011-07-14 15:18:03 -06:00
|
|
|
info->m[PSC_VOLTAGE_OUT] = 19199;
|
2011-03-17 14:16:01 -06:00
|
|
|
info->b[PSC_VOLTAGE_OUT] = 0;
|
|
|
|
info->R[PSC_VOLTAGE_OUT] = -2;
|
|
|
|
} else {
|
2011-07-14 15:18:03 -06:00
|
|
|
info->m[PSC_VOLTAGE_IN] = 6720;
|
2011-03-17 14:16:01 -06:00
|
|
|
info->b[PSC_VOLTAGE_IN] = 0;
|
|
|
|
info->R[PSC_VOLTAGE_IN] = -1;
|
2011-07-14 15:18:03 -06:00
|
|
|
info->m[PSC_VOLTAGE_OUT] = 6720;
|
2011-03-17 14:16:01 -06:00
|
|
|
info->b[PSC_VOLTAGE_OUT] = 0;
|
|
|
|
info->R[PSC_VOLTAGE_OUT] = -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (config & ADM1275_VIN_VOUT_SELECT)
|
|
|
|
info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
|
|
|
|
else
|
|
|
|
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
|
|
|
|
|
2011-06-30 03:30:03 -06:00
|
|
|
ret = pmbus_do_probe(client, id, info);
|
|
|
|
if (ret)
|
|
|
|
goto err_mem;
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_mem:
|
|
|
|
kfree(info);
|
|
|
|
return ret;
|
2011-03-17 14:16:01 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int adm1275_remove(struct i2c_client *client)
|
|
|
|
{
|
|
|
|
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = pmbus_do_remove(client);
|
|
|
|
kfree(info);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct i2c_device_id adm1275_id[] = {
|
|
|
|
{"adm1275", 0},
|
|
|
|
{ }
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, adm1275_id);
|
|
|
|
|
|
|
|
static struct i2c_driver adm1275_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "adm1275",
|
|
|
|
},
|
|
|
|
.probe = adm1275_probe,
|
|
|
|
.remove = adm1275_remove,
|
|
|
|
.id_table = adm1275_id,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init adm1275_init(void)
|
|
|
|
{
|
|
|
|
return i2c_add_driver(&adm1275_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit adm1275_exit(void)
|
|
|
|
{
|
|
|
|
i2c_del_driver(&adm1275_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Guenter Roeck");
|
|
|
|
MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(adm1275_init);
|
|
|
|
module_exit(adm1275_exit);
|