pinctrl: renesas: r8a779f0: Add INTC-EX pins, groups, and function

Add pins, groups, and function for the Interrupt Controller for External
Devices (INTC-EX) on the Renesas R-Car S4-8 (R8A779F0) SoC.

Based on a larger patch in the BSP by LUU HOAI.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/dc6e25da42ac4bd19ca31b5b32b43a10a0e1aa7e.1645457792.git.geert+renesas@glider.be

drivers/pinctrl/renesas/pfc-r8a779f0.c

@@ -634,6 +634,51 @@ static const unsigned int i2c5_mux[] = {
 	SDA5_MARK, SCL5_MARK,
 };
 
+
+/* - INTC-EX ---------------------------------------------------------------- */
+static const unsigned int intc_ex_irq0_pins[] = {
+	/* IRQ0 */
+	RCAR_GP_PIN(0, 17),
+};
+static const unsigned int intc_ex_irq0_mux[] = {
+	IRQ0_MARK,
+};
+static const unsigned int intc_ex_irq1_pins[] = {
+	/* IRQ1 */
+	RCAR_GP_PIN(0, 18),
+};
+static const unsigned int intc_ex_irq1_mux[] = {
+	IRQ1_MARK,
+};
+static const unsigned int intc_ex_irq2_pins[] = {
+	/* IRQ2 */
+	RCAR_GP_PIN(0, 19),
+};
+static const unsigned int intc_ex_irq2_mux[] = {
+	IRQ2_MARK,
+};
+static const unsigned int intc_ex_irq3_pins[] = {
+	/* IRQ3 */
+	RCAR_GP_PIN(0, 20),
+};
+static const unsigned int intc_ex_irq3_mux[] = {
+	IRQ3_MARK,
+};
+static const unsigned int intc_ex_irq4_pins[] = {
+	/* IRQ4 */
+	RCAR_GP_PIN(0, 11),
+};
+static const unsigned int intc_ex_irq4_mux[] = {
+	IRQ4_MARK,
+};
+static const unsigned int intc_ex_irq5_pins[] = {
+	/* IRQ5 */
+	RCAR_GP_PIN(0, 15),
+};
+static const unsigned int intc_ex_irq5_mux[] = {
+	IRQ5_MARK,
+};
+
 /* - SCIF0 ------------------------------------------------------------------ */
 static const unsigned int scif0_data_pins[] = {
 	/* RX0, TX0 */
@@ -754,6 +799,12 @@ static const struct sh_pfc_pin_group pinmux_groups[] = {
 	SH_PFC_PIN_GROUP(i2c3),
 	SH_PFC_PIN_GROUP(i2c4),
 	SH_PFC_PIN_GROUP(i2c5),
+	SH_PFC_PIN_GROUP(intc_ex_irq0),
+	SH_PFC_PIN_GROUP(intc_ex_irq1),
+	SH_PFC_PIN_GROUP(intc_ex_irq2),
+	SH_PFC_PIN_GROUP(intc_ex_irq3),
+	SH_PFC_PIN_GROUP(intc_ex_irq4),
+	SH_PFC_PIN_GROUP(intc_ex_irq5),
 	SH_PFC_PIN_GROUP(scif0_data),
 	SH_PFC_PIN_GROUP(scif0_clk),
 	SH_PFC_PIN_GROUP(scif0_ctrl),
@@ -817,6 +868,15 @@ static const char * const i2c5_groups[] = {
 	"i2c5",
 };
 
+static const char * const intc_ex_groups[] = {
+	"intc_ex_irq0",
+	"intc_ex_irq1",
+	"intc_ex_irq2",
+	"intc_ex_irq3",
+	"intc_ex_irq4",
+	"intc_ex_irq5",
+};
+
 static const char * const scif0_groups[] = {
 	"scif0_data",
 	"scif0_clk",
@@ -856,6 +916,7 @@ static const struct sh_pfc_function pinmux_functions[] = {
 	SH_PFC_FUNCTION(i2c3),
 	SH_PFC_FUNCTION(i2c4),
 	SH_PFC_FUNCTION(i2c5),
+	SH_PFC_FUNCTION(intc_ex),
 	SH_PFC_FUNCTION(scif0),
 	SH_PFC_FUNCTION(scif1),
 	SH_PFC_FUNCTION(scif3),