[PATCH] telephony: support devfs

Add devfs support to telephony devices.  Only tested with a single
telephony device.  Devices name phone/<minor>.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/telephony/phonedev.c

@@ -28,7 +28,7 @@
 
 #include <linux/kmod.h>
 #include <linux/sem.h>
-
+#include <linux/devfs_fs_kernel.h>
 
 #define PHONE_NUM_DEVICES	256
 
@@ -105,6 +105,8 @@ int phone_register_device(struct phone_device *p, int unit)
 		if (phone_device[i] == NULL) {
 			phone_device[i] = p;
 			p->minor = i;
+			devfs_mk_cdev(MKDEV(PHONE_MAJOR,i),
+				S_IFCHR|S_IRUSR|S_IWUSR, "phone/%d", i);
 			up(&phone_lock);
 			return 0;
 		}
@@ -122,6 +124,7 @@ void phone_unregister_device(struct phone_device *pfd)
 	down(&phone_lock);
 	if (phone_device[pfd->minor] != pfd)
 		panic("phone: bad unregister");
+	devfs_remove("phone/%d", pfd->minor);
 	phone_device[pfd->minor] = NULL;
 	up(&phone_lock);
 }