--- /dev/null
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <asm/errno.h>
+#include <asm/of_device.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;
+ while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
+ int match = 1;
+ if (matches->name[0])
+ match &= dev->node->name
+ && !strcmp(matches->name, dev->node->name);
+ if (matches->type[0])
+ match &= dev->node->type
+ && !strcmp(matches->type, dev->node->type);
+ if (matches->compatible[0])
+ match &= device_is_compatible(dev->node,
+ matches->compatible);
+ if (match)
+ return matches;
+ matches++;
+ }
+ return NULL;
+}
+
+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;
+}
+
+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;
+}
+
+void of_dev_put(struct of_device *dev)
+{
+ if (dev)
+ put_device(&dev->dev);
+}
+
+
+static int of_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_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_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_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;
+}
+
+struct bus_type of_platform_bus_type = {
+ .name = "of_platform",
+ .match = of_platform_bus_match,
+ .suspend = of_device_suspend,
+ .resume = of_device_resume,
+};
+
+static int __init of_bus_driver_init(void)
+{
+ return bus_register(&of_platform_bus_type);
+}
+
+postcore_initcall(of_bus_driver_init);
+
+int of_register_driver(struct of_platform_driver *drv)
+{
+ int count = 0;
+
+ /* initialize common driver fields */
+ drv->driver.name = drv->name;
+ drv->driver.bus = &of_platform_bus_type;
+ drv->driver.probe = of_device_probe;
+ drv->driver.remove = of_device_remove;
+
+ /* register with core */
+ count = driver_register(&drv->driver);
+ return count ? count : 1;
+}
+
+void of_unregister_driver(struct of_platform_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+
+
+static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct of_device *ofdev;
+
+ ofdev = to_of_device(dev);
+ return sprintf(buf, "%s", ofdev->node->full_name);
+}
+
+static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, 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);
+}
+
+int of_device_register(struct of_device *ofdev)
+{
+ int rc;
+ struct of_device **odprop;
+
+ BUG_ON(ofdev->node == NULL);
+
+ odprop = (struct of_device **)get_property(ofdev->node, "linux,device", NULL);
+ if (!odprop) {
+ struct property *new_prop;
+
+ new_prop = kmalloc(sizeof(struct property) + sizeof(struct of_device *),
+ GFP_KERNEL);
+ if (new_prop == NULL)
+ return -ENOMEM;
+ new_prop->name = "linux,device";
+ new_prop->length = sizeof(sizeof(struct of_device *));
+ new_prop->value = (unsigned char *)&new_prop[1];
+ odprop = (struct of_device **)new_prop->value;
+ *odprop = NULL;
+ prom_add_property(ofdev->node, new_prop);
+ }
+ *odprop = ofdev;
+
+ rc = device_register(&ofdev->dev);
+ if (rc)
+ return rc;
+
+ device_create_file(&ofdev->dev, &dev_attr_devspec);
+
+ return 0;
+}
+
+void of_device_unregister(struct of_device *ofdev)
+{
+ struct of_device **odprop;
+
+ device_remove_file(&ofdev->dev, &dev_attr_devspec);
+
+ odprop = (struct of_device **)get_property(ofdev->node, "linux,device", NULL);
+ if (odprop)
+ *odprop = NULL;
+
+ device_unregister(&ofdev->dev);
+}
+
+struct of_device* of_platform_device_create(struct device_node *np,
+ const char *bus_id,
+ struct device *parent)
+{
+ struct of_device *dev;
+
+ dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+ memset(dev, 0, sizeof(*dev));
+
+ dev->node = of_node_get(np);
+ dev->dma_mask = 0xffffffffUL;
+ dev->dev.dma_mask = &dev->dma_mask;
+ dev->dev.parent = parent;
+ dev->dev.bus = &of_platform_bus_type;
+ dev->dev.release = of_release_dev;
+
+ strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
+
+ if (of_device_register(dev) != 0) {
+ kfree(dev);
+ return NULL;
+ }
+
+ return dev;
+}
+
+EXPORT_SYMBOL(of_match_device);
+EXPORT_SYMBOL(of_platform_bus_type);
+EXPORT_SYMBOL(of_register_driver);
+EXPORT_SYMBOL(of_unregister_driver);
+EXPORT_SYMBOL(of_device_register);
+EXPORT_SYMBOL(of_device_unregister);
+EXPORT_SYMBOL(of_dev_get);
+EXPORT_SYMBOL(of_dev_put);
+EXPORT_SYMBOL(of_platform_device_create);
+EXPORT_SYMBOL(of_release_dev);
projects / linux-2.6 / commitdiff