v4.19.13 snapshot.
diff --git a/arch/arm/include/asm/nwflash.h b/arch/arm/include/asm/nwflash.h
new file mode 100644
index 0000000..0ec6f07
--- /dev/null
+++ b/arch/arm/include/asm/nwflash.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _FLASH_H
+#define _FLASH_H
+
+#define FLASH_MINOR		 160	/* MAJOR is 10 - miscdevice */
+#define CMD_WRITE_DISABLE	 0
+#define CMD_WRITE_ENABLE	 0x28
+#define CMD_WRITE_BASE64K_ENABLE 0x47
+
+#endif /* _FLASH_H */