[Bluetooth] Add platform device for virtual and serial devices

This patch adds a generic Bluetooth platform device that can be used
as parent device by virtual and serial devices.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 37 insertions, 2 deletions

diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 89918d2f1fdc..7789e26c84b9 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -3,6 +3,8 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 
+#include <linux/platform_device.h>
+
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 
@@ -197,9 +199,14 @@ struct class bt_class = {
         .uevent         = bt_uevent,
 #endif
 };
-
 EXPORT_SYMBOL_GPL(bt_class);
 
+static struct bus_type bt_bus = {
+        .name   = "bluetooth",
+};
+
+static struct platform_device *bt_platform;
+
 int hci_register_sysfs(struct hci_dev *hdev)
 {
         struct class_device *cdev = &hdev->class_dev;
@@ -211,6 +218,11 @@ int hci_register_sysfs(struct hci_dev *hdev)
         cdev->class = &bt_class;
         class_set_devdata(cdev, hdev);
 
+        if (!cdev->dev)
+                cdev->dev = &bt_platform->dev;
+
+        hdev->dev = cdev->dev;
+
         strlcpy(cdev->class_id, hdev->name, BUS_ID_SIZE);
         err = class_device_register(cdev);
         if (err < 0)
@@ -233,10 +245,33 @@ void hci_unregister_sysfs(struct hci_dev *hdev)
 
 int __init bt_sysfs_init(void)
 {
-        return class_register(&bt_class);
+        int err;
+
+        bt_platform = platform_device_register_simple("bluetooth", -1, NULL, 0);
+        if (IS_ERR(bt_platform))
+                return PTR_ERR(bt_platform);
+
+        err = bus_register(&bt_bus);
+        if (err < 0) {
+                platform_device_unregister(bt_platform);
+                return err;
+        }
+
+        err = class_register(&bt_class);
+        if (err < 0) {
+                bus_unregister(&bt_bus);
+                platform_device_unregister(bt_platform);
+                return err;
+        }
+
+        return 0;
 }
 
 void __exit bt_sysfs_cleanup(void)
 {
         class_unregister(&bt_class);
+
+        bus_unregister(&bt_bus);
+
+        platform_device_unregister(bt_platform);
 }