diff --git a/arch/openrisc/include/asm/setup.h b/arch/openrisc/include/asm/setup.h
new file mode 100644
index 0000000000000..9acbc5deda691
--- /dev/null
+++ b/arch/openrisc/include/asm/setup.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Stafford Horne
+ */
+#ifndef _ASM_OR1K_SETUP_H
+#define _ASM_OR1K_SETUP_H
+
+#include <linux/init.h>
+#include <asm-generic/setup.h>
+
+#ifndef __ASSEMBLY__
+void __init or1k_early_setup(void *fdt);
+#endif
+
+#endif /* _ASM_OR1K_SETUP_H */
diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c
index 7eddcac0ef2f9..0cd04d936a7a1 100644
--- a/arch/openrisc/kernel/setup.c
+++ b/arch/openrisc/kernel/setup.c
@@ -210,6 +210,7 @@ void __init setup_cpuinfo(void)
 
 /**
  * or1k_early_setup
+ * @fdt: pointer to the start of the device tree in memory or NULL
  *
  * Handles the pointer to the device tree that this kernel is to use
  * for establishing the available platform devices.
@@ -243,21 +244,6 @@ static inline unsigned long extract_value(unsigned long reg, unsigned long mask)
 	return mask & reg;
 }
 
-void __init detect_unit_config(unsigned long upr, unsigned long mask,
-			       char *text, void (*func) (void))
-{
-	if (text != NULL)
-		printk("%s", text);
-
-	if (upr & mask) {
-		if (func != NULL)
-			func();
-		else
-			printk("present\n");
-	} else
-		printk("not present\n");
-}
-
 /*
  * calibrate_delay
  *