diff --git a/drivers/staging/renesas/rcar/qos/D3/qos_init_d3.c b/drivers/staging/renesas/rcar/qos/D3/qos_init_d3.c
index 258abfc..b58b7c4 100644
--- a/drivers/staging/renesas/rcar/qos/D3/qos_init_d3.c
+++ b/drivers/staging/renesas/rcar/qos/D3/qos_init_d3.c
@@ -20,6 +20,9 @@
 {
 	uint32_t md=0;
 
+	/* Register write enable */
+	io_write_32(DBSC_DBSYSCNT0, 0x00001234U);
+
 	/* BUFCAM settings */
 	io_write_32(DBSC_DBCAM0CNF1, 0x00043218);
 	io_write_32(DBSC_DBCAM0CNF2, 0x000000F4);
@@ -65,12 +68,13 @@
 	io_write_32(DBSC_DBSCHQOS151, 0x00000030);
 	io_write_32(DBSC_DBSCHQOS152, 0x00000020);
 	io_write_32(DBSC_DBSCHQOS153, 0x00000010);
+
+	/* Register write protect */
+	io_write_32(DBSC_DBSYSCNT0, 0x00000000U);
 }
 
 void qos_init_d3(void)
 {
-	io_write_32(DBSC_DBSYSCNT0, 0x00001234);
-
 	dbsc_setting();
 
 	/* DRAM Split Address mapping */
@@ -159,5 +163,4 @@
 	/* Resource Alloc start */
 	io_write_32(QOSCTRL_RAEN,  0x00000001U);
 #endif /* !(RCAR_QOS_TYPE == RCAR_QOS_NONE) */
-	io_write_32(DBSC_DBSYSCNT0, 0x00000000);
 }