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/*
* Hardware monitoring driver for PFE3000 and compatibles
* Based on the zl6100 driver with the following copyright:
*
* Copyright (c) 2011 Ericsson AB.
* Copyright (c) 2012 Guenter Roeck
* Copyright 2004-present Facebook. All Rights Reserved.
*
*
* 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 <linux/ktime.h>
#include <linux/delay.h>
#include <linux/i2c/pmbus.h>
#include "pmbus.h"
enum chips { PFE3000 };
struct pfe3000_data {
struct pmbus_driver_info info;
};
#define to_pfe3000_data(x) container_of(x, struct pfe3000_data, info)
/*
* Other PowerOne device require a wait time; this is included in case
* it is necessary for future debugging.
*/
#define PFE3000_WAIT_TIME 0 /* uS */
static ushort delay = PFE3000_WAIT_TIME;
module_param(delay, ushort, 0644);
MODULE_PARM_DESC(delay, "Delay between chip accesses in uS");
static const struct i2c_device_id pfe3000_id[] = {
{"pfe3000", PFE3000 },
{"pfe3000", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, pfe3000_id);
static struct pmbus_platform_data platform_data = {
.flags = PMBUS_SKIP_STATUS_CHECK
};
static int pfe3000_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct pfe3000_data *data;
struct pmbus_driver_info *info;
data = devm_kzalloc(&client->dev, sizeof(struct pfe3000_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
info = &data->info;
info->pages = 7;
info->delay = delay;
/*
* Skip extra status checks; this is required to read the
* VOUT_MODE register to determine the exponent to apply
* to the VOUT values.
*/
dev->platform_data = &platform_data;
/* Make sure that the page isn't pointing elsewhere! */
i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
/*
* It seems reasonable to just scan the device for supported
* values, but most drivers seem to jam these values in
* there, so that's what we'll do.
*/
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN |
PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT |
PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12 |
PMBUS_HAVE_MFRDATA;
info->func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN |
PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT |
PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12 |
PMBUS_HAVE_STATUS_INPUT;
info->func[2] = PMBUS_HAVE_VOUT;
info->func[4] = PMBUS_HAVE_VOUT;
info->func[5] = PMBUS_HAVE_VOUT;
info->func[6] = PMBUS_HAVE_VOUT;
return pmbus_do_probe(client, id, info);
}
static struct i2c_driver pfe3000_driver = {
.driver = {
.name = "pfe3000",
},
.probe = pfe3000_probe,
.remove = pmbus_do_remove,
.id_table = pfe3000_id,
};
module_i2c_driver(pfe3000_driver);
MODULE_AUTHOR("Kevin Lahey, based on work by Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for PFE1100");
MODULE_LICENSE("GPL");
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