File-copy from v4.4.100

This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Please refer to that tree for all history prior to this point.

Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/arch/mips/ath79/common.h b/arch/mips/ath79/common.h
new file mode 100644
index 0000000..ca7cc19
--- /dev/null
+++ b/arch/mips/ath79/common.h
@@ -0,0 +1,30 @@
+/*
+ *  Atheros AR71XX/AR724X/AR913X common definitions
+ *
+ *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ *  Parts of this file are based on Atheros' 2.6.15 BSP
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#ifndef __ATH79_COMMON_H
+#define __ATH79_COMMON_H
+
+#include <linux/types.h>
+
+#define ATH79_MEM_SIZE_MIN	(2 * 1024 * 1024)
+#define ATH79_MEM_SIZE_MAX	(256 * 1024 * 1024)
+
+void ath79_clocks_init(void);
+unsigned long ath79_get_sys_clk_rate(const char *id);
+
+void ath79_ddr_ctrl_init(void);
+void ath79_ddr_wb_flush(unsigned int reg);
+
+void ath79_gpio_init(void);
+
+#endif /* __ATH79_COMMON_H */