+#else /* have serial comm */
+static int bm52x_rec_next_rsp(struct sr_serial_dev_inst *serial,
+ enum bm52x_reqtype req, struct brymen_bm52x_state *state)
+{
+ (void)serial;
+ (void)req;
+ (void)state;
+ (void)bm52x_rec_checksum;
+ return SR_ERR_NA;
+}
+#endif /* have serial comm */