driver model: add support for multi-board systems.

- device struct sys_root for describing the individual boards of a multi-board
  system.

- allow for registration of alternate device roots.

- check if struct sys_device::root is set on registration, and add it as a child of
  an alternative root, if it's set. 

1 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index 7abeead7bfe1..53a71f85ae59 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -379,6 +379,16 @@ extern void put_device(struct device * dev);
 
 /* drivers/base/sys.c */
 
+struct sys_root {
+	u32		id;
+	struct device 	dev;
+	struct device	sysdev;
+};
+
+extern int sys_register_root(struct sys_root *);
+extern void sys_unregister_root(struct sys_root *);
+
+
 struct sys_device {
 	char		* name;
 	u32		id;