diff --git a/include/linux/basic_mmio_gpio.h b/include/linux/basic_mmio_gpio.h
index feb91219..1c504ca 100644
--- a/include/linux/basic_mmio_gpio.h
+++ b/include/linux/basic_mmio_gpio.h
@@ -67,6 +67,10 @@
 int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
 	       unsigned long sz, void __iomem *dat, void __iomem *set,
 	       void __iomem *clr, void __iomem *dirout, void __iomem *dirin,
-	       bool big_endian);
+	       unsigned long flags);
+
+#define BGPIOF_BIG_ENDIAN		BIT(0)
+#define BGPIOF_UNREADABLE_REG_SET	BIT(1) /* reg_set is unreadable */
+#define BGPIOF_UNREADABLE_REG_DIR	BIT(2) /* reg_dir is unreadable */
 
 #endif /* __BASIC_MMIO_GPIO_H */