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path: root/drivers/input/input.c
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Diffstat (limited to 'drivers/input/input.c')
-rw-r--r--drivers/input/input.c77
1 files changed, 72 insertions, 5 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 072bbf52815..0e2e890c098 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -27,6 +27,7 @@ MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
MODULE_DESCRIPTION("Input core");
MODULE_LICENSE("GPL");
+EXPORT_SYMBOL(input_allocate_device);
EXPORT_SYMBOL(input_register_device);
EXPORT_SYMBOL(input_unregister_device);
EXPORT_SYMBOL(input_register_handler);
@@ -605,6 +606,56 @@ static inline int input_proc_init(void) { return 0; }
static inline void input_proc_exit(void) { }
#endif
+static void input_dev_release(struct class_device *class_dev)
+{
+ struct input_dev *dev = to_input_dev(class_dev);
+
+ kfree(dev);
+ module_put(THIS_MODULE);
+}
+
+static struct class input_dev_class = {
+ .name = "input_dev",
+ .release = input_dev_release,
+};
+
+struct input_dev *input_allocate_device(void)
+{
+ struct input_dev *dev;
+
+ dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL);
+ if (dev) {
+ dev->dynalloc = 1;
+ dev->cdev.class = &input_dev_class;
+ class_device_initialize(&dev->cdev);
+ INIT_LIST_HEAD(&dev->h_list);
+ INIT_LIST_HEAD(&dev->node);
+ }
+
+ return dev;
+}
+
+static void input_register_classdevice(struct input_dev *dev)
+{
+ static atomic_t input_no = ATOMIC_INIT(0);
+ const char *path;
+
+ __module_get(THIS_MODULE);
+
+ dev->dev = dev->cdev.dev;
+
+ snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id),
+ "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
+
+ path = kobject_get_path(&dev->cdev.class->subsys.kset.kobj, GFP_KERNEL);
+ printk(KERN_INFO "input: %s/%s as %s\n",
+ dev->name ? dev->name : "Unspecified device",
+ path ? path : "", dev->cdev.class_id);
+ kfree(path);
+
+ class_device_add(&dev->cdev);
+}
+
void input_register_device(struct input_dev *dev)
{
struct input_handle *handle;
@@ -637,6 +688,10 @@ void input_register_device(struct input_dev *dev)
if ((handle = handler->connect(handler, dev, id)))
input_link_handle(handle);
+
+ if (dev->dynalloc)
+ input_register_classdevice(dev);
+
#ifdef CONFIG_HOTPLUG
input_call_hotplug("add", dev);
#endif
@@ -665,6 +720,9 @@ void input_unregister_device(struct input_dev *dev)
list_del_init(&dev->node);
+ if (dev->dynalloc)
+ class_device_unregister(&dev->cdev);
+
input_wakeup_procfs_readers();
}
@@ -753,26 +811,34 @@ static int __init input_init(void)
{
int err;
+ err = class_register(&input_dev_class);
+ if (err) {
+ printk(KERN_ERR "input: unable to register input_dev class\n");
+ return err;
+ }
+
input_class = class_create(THIS_MODULE, "input");
if (IS_ERR(input_class)) {
printk(KERN_ERR "input: unable to register input class\n");
- return PTR_ERR(input_class);
+ err = PTR_ERR(input_class);
+ goto fail1;
}
err = input_proc_init();
if (err)
- goto fail1;
+ goto fail2;
err = register_chrdev(INPUT_MAJOR, "input", &input_fops);
if (err) {
printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR);
- goto fail2;
+ goto fail3;
}
return 0;
- fail2: input_proc_exit();
- fail1: class_destroy(input_class);
+ fail3: input_proc_exit();
+ fail2: class_destroy(input_class);
+ fail1: class_unregister(&input_dev_class);
return err;
}
@@ -781,6 +847,7 @@ static void __exit input_exit(void)
input_proc_exit();
unregister_chrdev(INPUT_MAJOR, "input");
class_destroy(input_class);
+ class_unregister(&input_dev_class);
}
subsys_initcall(input_init);