v4.19.13 snapshot.
diff --git a/include/linux/clk/sunxi-ng.h b/include/linux/clk/sunxi-ng.h
new file mode 100644
index 0000000..990f760
--- /dev/null
+++ b/include/linux/clk/sunxi-ng.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2017 Chen-Yu Tsai. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _LINUX_CLK_SUNXI_NG_H_
+#define _LINUX_CLK_SUNXI_NG_H_
+
+#include <linux/errno.h>
+
+#ifdef CONFIG_SUNXI_CCU
+int sunxi_ccu_set_mmc_timing_mode(struct clk *clk, bool new_mode);
+int sunxi_ccu_get_mmc_timing_mode(struct clk *clk);
+#else
+static inline int sunxi_ccu_set_mmc_timing_mode(struct clk *clk,
+ bool new_mode)
+{
+ return -ENOTSUPP;
+}
+
+static inline int sunxi_ccu_get_mmc_timing_mode(struct clk *clk)
+{
+ return -ENOTSUPP;
+}
+#endif
+
+#endif