1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/include/mach/system_rev.h b/arch/arm/mach-at91/include/mach/system_rev.h
new file mode 100644
index 00000000..ef79a9aa
--- /dev/null
+++ b/arch/arm/mach-at91/include/mach/system_rev.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2011 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * Under GPLv2 only
+ */
+
+#ifndef __ARCH_SYSTEM_REV_H__
+#define __ARCH_SYSTEM_REV_H__
+
+#include <asm/system_info.h>
+
+/*
+ * board revision encoding
+ * mach specific
+ * the 16-31 bit are reserved for at91 generic information
+ *
+ * bit 31:
+ *	0 => nand 8 bit
+ *	1 => nand 16 bit
+ */
+#define BOARD_HAVE_NAND_16BIT	(1 << 31)
+static inline int board_have_nand_16bit(void)
+{
+	return (system_rev & BOARD_HAVE_NAND_16BIT) ? 1 : 0;
+}
+
+#endif /* __ARCH_SYSTEM_REV_H__ */