struct device* dev = device_allocseq(NULL, sdev);
dev->ops.read = __serial_read;
dev->ops.read_page = __serial_read_page;
+ dev->ops.read_async = __serial_read_async;
+ dev->ops.write_async = __serial_write_async;
dev->ops.write = __serial_write;
dev->ops.write_page = __serial_write_page;
dev->ops.exec_cmd = __serial_exec_command;