diff --git a/drivers/staging/renesas/rcar/pfc/H3/pfc_init_h3_v1.c b/drivers/staging/renesas/rcar/pfc/H3/pfc_init_h3_v1.c
index 952cc6b74373748e1329b805f08942c4d5008e3c..7287c833915a1c0d2f4ec78544b3ca5d09eb1c64 100644
--- a/drivers/staging/renesas/rcar/pfc/H3/pfc_init_h3_v1.c
+++ b/drivers/staging/renesas/rcar/pfc/H3/pfc_init_h3_v1.c
@@ -553,8 +553,6 @@
 #define MOD_SEL2_VIN4_A		((uint32_t)0U << 0U)
 #define MOD_SEL2_VIN4_B		((uint32_t)1U << 0U)
 
-static void pfc_reg_write(uint32_t addr, uint32_t data);
-
 static void pfc_reg_write(uint32_t addr, uint32_t data)
 {
 	mmio_write_32(PFC_PMMR, ~data);
diff --git a/drivers/staging/renesas/rcar/pfc/H3/pfc_init_h3_v2.c b/drivers/staging/renesas/rcar/pfc/H3/pfc_init_h3_v2.c
index e5d8bfed82e76f56553840d200eee1402c5aa1dc..8bba3c150687079b1812ab5785be13350e085847 100644
--- a/drivers/staging/renesas/rcar/pfc/H3/pfc_init_h3_v2.c
+++ b/drivers/staging/renesas/rcar/pfc/H3/pfc_init_h3_v2.c
@@ -570,8 +570,6 @@
 #define MOD_SEL2_VIN4_A		((uint32_t)0U << 0U)
 #define MOD_SEL2_VIN4_B		((uint32_t)1U << 0U)
 
-static void pfc_reg_write(uint32_t addr, uint32_t data);
-
 static void pfc_reg_write(uint32_t addr, uint32_t data)
 {
 	mmio_write_32(PFC_PMMR, ~data);