diff --git a/drivers/clk/renesas/clk-r8a7778.c b/drivers/clk/renesas/clk-r8a7778.c
index 07ea411098a7..886a8380e912 100644
--- a/drivers/clk/renesas/clk-r8a7778.c
+++ b/drivers/clk/renesas/clk-r8a7778.c
@@ -143,16 +143,3 @@ static void __init r8a7778_cpg_clocks_init(struct device_node *np)
 
 CLK_OF_DECLARE(r8a7778_cpg_clks, "renesas,r8a7778-cpg-clocks",
 	       r8a7778_cpg_clocks_init);
-
-void __init r8a7778_clocks_init(u32 mode)
-{
-	BUG_ON(!(mode & BIT(19)));
-
-	cpg_mode_rates = (!!(mode & BIT(18)) << 2) |
-			 (!!(mode & BIT(12)) << 1) |
-			 (!!(mode & BIT(11)));
-	cpg_mode_divs = (!!(mode & BIT(2)) << 1) |
-			(!!(mode & BIT(1)));
-
-	of_clk_init(NULL);
-}
diff --git a/include/linux/clk/renesas.h b/include/linux/clk/renesas.h
index ba6fa4148515..2b663bba1adc 100644
--- a/include/linux/clk/renesas.h
+++ b/include/linux/clk/renesas.h
@@ -20,7 +20,6 @@ struct device;
 struct device_node;
 struct generic_pm_domain;
 
-void r8a7778_clocks_init(u32 mode);
 void r8a7779_clocks_init(u32 mode);
 void rcar_gen2_clocks_init(u32 mode);