diff --git a/drivers/pinctrl/renesas/pfc-r8a779g0.c b/drivers/pinctrl/renesas/pfc-r8a779g0.c
index 114b558d75b7..cff48ba6f5d7 100644
--- a/drivers/pinctrl/renesas/pfc-r8a779g0.c
+++ b/drivers/pinctrl/renesas/pfc-r8a779g0.c
@@ -302,13 +302,13 @@
 #define IP0SR1_15_12	FM(MSIOF1_SCK)		FM(HSCK3_A)		FM(CTS3_N)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
 #define IP0SR1_19_16	FM(MSIOF1_TXD)		FM(HRX3_A)		FM(SCK3)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
 #define IP0SR1_23_20	FM(MSIOF1_RXD)		F_(0, 0)		F_(0, 0)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
-#define IP0SR1_27_24	FM(MSIOF0_SS2)		FM(HTX1_X)		F_(0, 0)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
-#define IP0SR1_31_28	FM(MSIOF0_SS1)		FM(HRX1_X)		F_(0, 0)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
+#define IP0SR1_27_24	FM(MSIOF0_SS2)		FM(HTX1_X)		FM(TX1_X)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
+#define IP0SR1_31_28	FM(MSIOF0_SS1)		FM(HRX1_X)		FM(RX1_X)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
 
 /* IP1SR1 */		/* 0 */			/* 1 */			/* 2 */		/* 3		4	 5	  6	   7	    8	     9	      A	       B	C	 D	  E	   F */
-#define IP1SR1_3_0	FM(MSIOF0_SYNC)		FM(HCTS1_N_X)		F_(0, 0)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
-#define IP1SR1_7_4	FM(MSIOF0_TXD)		FM(HRTS1_N_X)		F_(0, 0)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
-#define IP1SR1_11_8	FM(MSIOF0_SCK)		FM(HSCK1_X)		F_(0, 0)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
+#define IP1SR1_3_0	FM(MSIOF0_SYNC)		FM(HCTS1_N_X)		FM(CTS1_N_X)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
+#define IP1SR1_7_4	FM(MSIOF0_TXD)		FM(HRTS1_N_X)		FM(RTS1_N_X)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
+#define IP1SR1_11_8	FM(MSIOF0_SCK)		FM(HSCK1_X)		FM(SCK1_X)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
 #define IP1SR1_15_12	FM(MSIOF0_RXD)		F_(0, 0)		F_(0, 0)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
 #define IP1SR1_19_16	FM(HTX0)		FM(TX0)			F_(0, 0)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
 #define IP1SR1_23_20	FM(HCTS0_N)		FM(CTS0_N)		FM(PWM8)	F_(0, 0)	F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0) F_(0, 0)
@@ -818,19 +818,24 @@ static const u16 pinmux_data[] = {
 
 	PINMUX_IPSR_GPSR(IP0SR1_27_24,	MSIOF0_SS2),
 	PINMUX_IPSR_GPSR(IP0SR1_27_24,	HTX1_X),
+	PINMUX_IPSR_GPSR(IP0SR1_27_24,	TX1_X),
 
 	PINMUX_IPSR_GPSR(IP0SR1_31_28,	MSIOF0_SS1),
 	PINMUX_IPSR_GPSR(IP0SR1_31_28,	HRX1_X),
+	PINMUX_IPSR_GPSR(IP0SR1_31_28,	RX1_X),
 
 	/* IP1SR1 */
 	PINMUX_IPSR_GPSR(IP1SR1_3_0,	MSIOF0_SYNC),
 	PINMUX_IPSR_GPSR(IP1SR1_3_0,	HCTS1_N_X),
+	PINMUX_IPSR_GPSR(IP1SR1_3_0,	CTS1_N_X),
 
 	PINMUX_IPSR_GPSR(IP1SR1_7_4,	MSIOF0_TXD),
 	PINMUX_IPSR_GPSR(IP1SR1_7_4,	HRTS1_N_X),
+	PINMUX_IPSR_GPSR(IP1SR1_7_4,	RTS1_N_X),
 
 	PINMUX_IPSR_GPSR(IP1SR1_11_8,	MSIOF0_SCK),
 	PINMUX_IPSR_GPSR(IP1SR1_11_8,	HSCK1_X),
+	PINMUX_IPSR_GPSR(IP1SR1_11_8,	SCK1_X),
 
 	PINMUX_IPSR_GPSR(IP1SR1_15_12,	MSIOF0_RXD),
 
@@ -2181,6 +2186,29 @@ static const unsigned int scif1_ctrl_mux[] = {
 	RTS1_N_MARK, CTS1_N_MARK,
 };
 
+/* - SCIF1_X ------------------------------------------------------------------ */
+static const unsigned int scif1_data_x_pins[] = {
+	/* RX1_X, TX1_X */
+	RCAR_GP_PIN(1, 7), RCAR_GP_PIN(1, 6),
+};
+static const unsigned int scif1_data_x_mux[] = {
+	RX1_X_MARK, TX1_X_MARK,
+};
+static const unsigned int scif1_clk_x_pins[] = {
+	/* SCK1_X */
+	RCAR_GP_PIN(1, 10),
+};
+static const unsigned int scif1_clk_x_mux[] = {
+	SCK1_X_MARK,
+};
+static const unsigned int scif1_ctrl_x_pins[] = {
+	/* RTS1_N_X, CTS1_N_X */
+	RCAR_GP_PIN(1, 9), RCAR_GP_PIN(1, 8),
+};
+static const unsigned int scif1_ctrl_x_mux[] = {
+	RTS1_N_X_MARK, CTS1_N_X_MARK,
+};
+
 /* - SCIF3 ------------------------------------------------------------------ */
 static const unsigned int scif3_data_pins[] = {
 	/* RX3, TX3 */
@@ -2501,9 +2529,12 @@ static const struct sh_pfc_pin_group pinmux_groups[] = {
 	SH_PFC_PIN_GROUP(scif0_data),
 	SH_PFC_PIN_GROUP(scif0_clk),
 	SH_PFC_PIN_GROUP(scif0_ctrl),
-	SH_PFC_PIN_GROUP(scif1_data),
-	SH_PFC_PIN_GROUP(scif1_clk),
-	SH_PFC_PIN_GROUP(scif1_ctrl),
+	SH_PFC_PIN_GROUP(scif1_data),		/* suffix might be updated */
+	SH_PFC_PIN_GROUP(scif1_data_x),		/* suffix might be updated */
+	SH_PFC_PIN_GROUP(scif1_clk),		/* suffix might be updated */
+	SH_PFC_PIN_GROUP(scif1_clk_x),		/* suffix might be updated */
+	SH_PFC_PIN_GROUP(scif1_ctrl),		/* suffix might be updated */
+	SH_PFC_PIN_GROUP(scif1_ctrl_x),		/* suffix might be updated */
 	SH_PFC_PIN_GROUP(scif3_data),		/* suffix might be updated */
 	SH_PFC_PIN_GROUP(scif3_data_a),		/* suffix might be updated */
 	SH_PFC_PIN_GROUP(scif3_clk),		/* suffix might be updated */
@@ -2786,9 +2817,13 @@ static const char * const scif0_groups[] = {
 };
 
 static const char * const scif1_groups[] = {
+	/* suffix might be updated */
 	"scif1_data",
+	"scif1_data_x",
 	"scif1_clk",
+	"scif1_clk_x",
 	"scif1_ctrl",
+	"scif1_ctrl_x",
 };
 
 static const char * const scif3_groups[] = {
