1 #include <linux/string.h>
2 #include <linux/kernel.h>
3 #include <linux/init.h>
4 #include <linux/module.h>
5 #include <linux/mod_devicetable.h>
6 #include <linux/slab.h>
9 #include <asm/of_device.h>
12 * of_match_node - Tell if an device_node has a matching of_match structure
13 * @ids: array of of device match structures to search in
14 * @node: the of device structure to match against
16 * Low level utility function used by device matching.
18 const struct of_device_id *of_match_node(const struct of_device_id *matches,
19 const struct device_node *node)
21 while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
25 && !strcmp(matches->name, node->name);
28 && !strcmp(matches->type, node->type);
29 if (matches->compatible[0])
30 match &= device_is_compatible(node,
40 * of_match_device - Tell if an of_device structure has a matching
42 * @ids: array of of device match structures to search in
43 * @dev: the of device structure to match against
45 * Used by a driver to check whether an of_device present in the
46 * system is in its list of supported devices.
48 const struct of_device_id *of_match_device(const struct of_device_id *matches,
49 const struct of_device *dev)
53 return of_match_node(matches, dev->node);
56 struct of_device *of_dev_get(struct of_device *dev)
62 tmp = get_device(&dev->dev);
64 return to_of_device(tmp);
69 void of_dev_put(struct of_device *dev)
72 put_device(&dev->dev);
75 static ssize_t dev_show_devspec(struct device *dev,
76 struct device_attribute *attr, char *buf)
78 struct of_device *ofdev;
80 ofdev = to_of_device(dev);
81 return sprintf(buf, "%s", ofdev->node->full_name);
84 static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL);
87 * of_release_dev - free an of device structure when all users of it are finished.
88 * @dev: device that's been disconnected
90 * Will be called only by the device core when all users of this of device are
93 void of_release_dev(struct device *dev)
95 struct of_device *ofdev;
97 ofdev = to_of_device(dev);
98 of_node_put(ofdev->node);
102 int of_device_register(struct of_device *ofdev)
106 BUG_ON(ofdev->node == NULL);
108 rc = device_register(&ofdev->dev);
112 device_create_file(&ofdev->dev, &dev_attr_devspec);
117 void of_device_unregister(struct of_device *ofdev)
119 device_remove_file(&ofdev->dev, &dev_attr_devspec);
121 device_unregister(&ofdev->dev);
125 EXPORT_SYMBOL(of_match_node);
126 EXPORT_SYMBOL(of_match_device);
127 EXPORT_SYMBOL(of_device_register);
128 EXPORT_SYMBOL(of_device_unregister);
129 EXPORT_SYMBOL(of_dev_get);
130 EXPORT_SYMBOL(of_dev_put);
131 EXPORT_SYMBOL(of_release_dev);