/* i2c-core.c - a device driver for the iic-bus interface */
/* ------------------------------------------------------------------------- */
/* Copyright (C) 1995-99 Simon G. Vogl
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. */
/* ------------------------------------------------------------------------- */
/* With some changes from Ky�sti M�lkki <kmalkki@cc.hut.fi>.
All SMBus-related things are written by Frodo Looijaard <frodol@dds.nl>
SMBus 2.0 support by Mark Studebaker <mdsxyz123@yahoo.com> */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/idr.h>
#include <linux/seq_file.h>
#include <asm/uaccess.h>
static LIST_HEAD(adapters);
static LIST_HEAD(drivers);
static DECLARE_MUTEX(core_lists);
static DEFINE_IDR(i2c_adapter_idr);
/* match always succeeds, as we want the probe() to tell if we really accept this match */
static int i2c_device_match(struct device *dev, struct device_driver *drv)
{
return 1;
}
static int i2c_bus_suspend(struct device * dev, pm_message_t state)
{
int rc = 0;
if (dev->driver && dev->driver->suspend)
rc = dev->driver->suspend(dev,state,0);
return rc;
}
static int i2c_bus_resume(struct device * dev)
{
int rc = 0;
if (dev->driver && dev->driver->resume)
rc = dev->driver->resume(dev,0);
return rc;
}
static struct bus_type i2c_bus_type = {
.name = "i2c",
.match = i2c_device_match,
.suspend = i2c_bus_suspend,
.resume = i2c_bus_resume,
};
static int i2c_device_probe(struct device *dev)
{
return -ENODEV;
}
static int i2c_device_remove(struct device *dev)
{
return 0;
}
static void i2c_adapter_dev_release(struct device *dev)
{
struct i2c_adapter *adap = dev_to_i2c_adapter(dev);
complete(&adap->dev_released);
}
static struct device_driver i2c_adapter_driver = {
.name = "i2c_adapter",
.bus = &i2c_bus_type,
.probe = i2c_device_probe,
.remove = i2c_device_remove,
};
static void i2c_adapter_class_dev_release(struct class_device *dev)
{
struct i2c_adapter *adap = class_dev_to_i2c_adapter(dev);
complete(&adap->class_dev_released);
}
static struct class i2c_adapter_class = {
.name = "i2c-adapter",
.release = &i2c_adapter_class_dev_release,
};
static ssize_t show_adapter_name(struct device *dev, struct device_attribute *attr, char *buf)
{
struct i2c_adapter *adap = dev_to_i2c_adapter(dev);
return sprintf(buf, "%s\n", adap->name);
}
st