diff --git a/drivers/clk/mediatek/clk-mt8173.c b/drivers/clk/mediatek/clk-mt8173.c
index 448e5dc1acd8..63e32fdb660f 100644
--- a/drivers/clk/mediatek/clk-mt8173.c
+++ b/drivers/clk/mediatek/clk-mt8173.c
@@ -15,8 +15,6 @@
 #include <linux/clk.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/slab.h>
-#include <linux/mfd/syscon.h>
 
 #include "clk-mtk.h"
 #include "clk-gate.h"
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index c5cbecb3d218..9f1982059cff 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -42,7 +42,7 @@ struct mtk_fixed_factor {
 		.div = _div,				\
 	}
 
-extern void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
+void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
 		int num, struct clk_onecell_data *clk_data);
 
 struct mtk_composite {
@@ -159,7 +159,7 @@ struct mtk_pll_data {
 	const struct mtk_pll_div_table *div_table;
 };
 
-void __init mtk_clk_register_plls(struct device_node *node,
+void mtk_clk_register_plls(struct device_node *node,
 		const struct mtk_pll_data *plls, int num_plls,
 		struct clk_onecell_data *clk_data);