diff --git a/drivers/marvell/comphy/phy-comphy-cp110.c b/drivers/marvell/comphy/phy-comphy-cp110.c
index 8b78280..326d5a8 100644
--- a/drivers/marvell/comphy/phy-comphy-cp110.c
+++ b/drivers/marvell/comphy/phy-comphy-cp110.c
@@ -2201,7 +2201,7 @@
 	return 0;
 }
 
-int mvebu_cp110_comphy_power_on(uint64_t comphy_base, uint64_t comphy_index,
+int mvebu_cp110_comphy_power_on(uint64_t comphy_base, uint8_t comphy_index,
 				uint64_t comphy_mode)
 {
 	int mode = COMPHY_GET_MODE(comphy_mode);
@@ -2247,7 +2247,7 @@
 		err = mvebu_cp110_comphy_ap_power_on(comphy_base, comphy_index);
 		break;
 	default:
-		ERROR("comphy%lld: unsupported comphy mode\n", comphy_index);
+		ERROR("comphy%d: unsupported comphy mode\n", comphy_index);
 		err = -EINVAL;
 		break;
 	}
@@ -2257,7 +2257,7 @@
 	return err;
 }
 
-int mvebu_cp110_comphy_power_off(uint64_t comphy_base, uint64_t comphy_index)
+int mvebu_cp110_comphy_power_off(uint64_t comphy_base, uint8_t comphy_index)
 {
 	uintptr_t sd_ip_addr, comphy_ip_addr;
 	uint32_t mask, data;
diff --git a/drivers/marvell/comphy/phy-comphy-cp110.h b/drivers/marvell/comphy/phy-comphy-cp110.h
index ada6aec..2461e5c 100644
--- a/drivers/marvell/comphy/phy-comphy-cp110.h
+++ b/drivers/marvell/comphy/phy-comphy-cp110.h
@@ -8,11 +8,11 @@
 /* Marvell CP110 SoC COMPHY unit driver */
 
 int mvebu_cp110_comphy_is_pll_locked(uint64_t comphy_base,
-				     uint64_t comphy_index);
+				     uint8_t comphy_index);
 int mvebu_cp110_comphy_power_off(uint64_t comphy_base,
-				 uint64_t comphy_index);
+				 uint8_t comphy_index);
 int mvebu_cp110_comphy_power_on(uint64_t comphy_base,
-				uint64_t comphy_index, uint64_t comphy_mode);
+				uint8_t comphy_index, uint64_t comphy_mode);
 int mvebu_cp110_comphy_xfi_rx_training(uint64_t comphy_base,
 				       uint8_t comphy_index);
 int mvebu_cp110_comphy_digital_reset(uint64_t comphy_base, uint8_t comphy_index,