- * virtual_request_io: - reserve io memory
- * @io_addr: The reserved memory starts at @io_addr, wich is the module
- * parameter @io.
+ * virtual_request_io: - reserve io or memory range for can board
+ * @candev: pointer to candevice/board which asks for io. Field @io_addr
+ * of @candev is used in most cases to define start of the range