#ifdef BROADCOM
#include "gpio-bcm947xx.h"
#else
-#error "Unsupported configuration."
+#warning "Unsupported configuration."
+
+#define gpio_in() (-1U)
+#define gpio_out(mask, value) (-1U)
+#define gpio_outen(mask, value) (-1U)
+#define gpio_control(mask, value) (-1U)
+#define gpio_intmask(mask, value) (-1U)
+#define gpio_intpolarity(mask, value) (-1U)
+
#endif
#endif /* __GPIO_H */