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#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <asm/errno.h>
/**
* of_match_device - Tell if an of_device structure has a matching
* of_match structure
* @ids: array of of device match structures to search in
* @dev: the of device structure to match against
*
* Used by a driver to check whether an of_device present in the
* system is in its list of supported devices.
*/
const struct of_device_id *of_match_device(const struct of_device_id *matches,
const struct of_device *dev)
{
if (!dev->node)
return NULL;
return of_match_node(matches, dev->node);
}
EXPORT_SYMBOL(of_match_device);
struct of_device *of_dev_get(struct of_device *dev)
{
struct device *tmp;
if (!dev)
return NULL;
tmp = get_device(&dev->dev);
if (tmp)
return to_of_device(tmp);
else
return NULL;
}
EXPORT_SYMBOL(of_dev_get);
void of_dev_put(struct of_device *dev)
{
if (dev)
put_device(&dev->dev);
}
EXPORT_SYMBOL(of_dev_put);
static ssize_t devspec_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct of_device *ofdev;
ofdev = to_of_device(dev);
return sprintf(buf, "%s\n", ofdev->node->full_name);
}
static ssize_t modalias_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct of_device *ofdev = to_of_device(dev);
ssize_t len = 0;
len = of_device_get_modalias(ofdev, buf, PAGE_SIZE - 2);
buf[len] = '\n';
buf[len+1] = 0;
return len+1;
}
struct device_attribute of_platform_device_attrs[] = {
__ATTR_RO(devspec),
__ATTR_RO(modalias),
__ATTR_NULL
};
/**
* of_release_dev - free an of device structure when all users of it are finished.
* @dev: device that's been disconnected
*
* Will be called only by the device core when all users of this of device are
* done.
*/
void of_release_dev(struct device *dev)
{
struct of_device *ofdev;
ofdev = to_of_device(dev);
of_node_put(ofdev->node);
kfree(ofdev);
}
EXPORT_SYMBOL(of_release_dev);
int of_device_register(struct of_device *ofdev)
{
BUG_ON(ofdev->node == NULL);
return device_register(&ofdev->dev);
}
EXPORT_SYMBOL(of_device_register);
void of_device_unregister(struct of_device *ofdev)
{
device_unregister(&ofdev->dev);
}
EXPORT_SYMBOL(of_device_unregister);
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