128 строки
3.3 KiB
C
128 строки
3.3 KiB
C
/*
|
|
* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
|
|
* <benh@kernel.crashing.org>
|
|
* and Arnd Bergmann, IBM Corp.
|
|
* Merged from powerpc/kernel/of_platform.c and
|
|
* sparc{,64}/kernel/of_device.c by Stephen Rothwell
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *of_drv = to_of_platform_driver(drv);
|
|
const struct of_device_id *matches = of_drv->match_table;
|
|
|
|
if (!matches)
|
|
return 0;
|
|
|
|
return of_match_device(matches, of_dev) != NULL;
|
|
}
|
|
|
|
static int of_platform_device_probe(struct device *dev)
|
|
{
|
|
int error = -ENODEV;
|
|
struct of_platform_driver *drv;
|
|
struct of_device *of_dev;
|
|
const struct of_device_id *match;
|
|
|
|
drv = to_of_platform_driver(dev->driver);
|
|
of_dev = to_of_device(dev);
|
|
|
|
if (!drv->probe)
|
|
return error;
|
|
|
|
of_dev_get(of_dev);
|
|
|
|
match = of_match_device(drv->match_table, of_dev);
|
|
if (match)
|
|
error = drv->probe(of_dev, match);
|
|
if (error)
|
|
of_dev_put(of_dev);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int of_platform_device_remove(struct device *dev)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->remove)
|
|
drv->remove(of_dev);
|
|
return 0;
|
|
}
|
|
|
|
static int of_platform_device_suspend(struct device *dev, pm_message_t state)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
|
|
int error = 0;
|
|
|
|
if (dev->driver && drv->suspend)
|
|
error = drv->suspend(of_dev, state);
|
|
return error;
|
|
}
|
|
|
|
static int of_platform_device_resume(struct device * dev)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
|
|
int error = 0;
|
|
|
|
if (dev->driver && drv->resume)
|
|
error = drv->resume(of_dev);
|
|
return error;
|
|
}
|
|
|
|
static void of_platform_device_shutdown(struct device *dev)
|
|
{
|
|
struct of_device *of_dev = to_of_device(dev);
|
|
struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->shutdown)
|
|
drv->shutdown(of_dev);
|
|
}
|
|
|
|
int of_bus_type_init(struct bus_type *bus, const char *name)
|
|
{
|
|
bus->name = name;
|
|
bus->match = of_platform_bus_match;
|
|
bus->probe = of_platform_device_probe;
|
|
bus->remove = of_platform_device_remove;
|
|
bus->suspend = of_platform_device_suspend;
|
|
bus->resume = of_platform_device_resume;
|
|
bus->shutdown = of_platform_device_shutdown;
|
|
return bus_register(bus);
|
|
}
|
|
|
|
int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
|
|
{
|
|
/* initialize common driver fields */
|
|
if (!drv->driver.name)
|
|
drv->driver.name = drv->name;
|
|
if (!drv->driver.owner)
|
|
drv->driver.owner = drv->owner;
|
|
drv->driver.bus = bus;
|
|
|
|
/* register with core */
|
|
return driver_register(&drv->driver);
|
|
}
|
|
EXPORT_SYMBOL(of_register_driver);
|
|
|
|
void of_unregister_driver(struct of_platform_driver *drv)
|
|
{
|
|
driver_unregister(&drv->driver);
|
|
}
|
|
EXPORT_SYMBOL(of_unregister_driver);
|