pinctrl: renesas: Initial R8A77990 PFC support

This patch adds initial pinctrl driver to support for the R8A77990 SoC.

Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/drivers/pinctrl/renesas/Kconfig b/drivers/pinctrl/renesas/Kconfig
index 5e6d854..1baab90 100644
--- a/drivers/pinctrl/renesas/Kconfig
+++ b/drivers/pinctrl/renesas/Kconfig
@@ -94,6 +94,17 @@
 	  the GPIO definitions and pin control functions for each available
 	  multiplex function.
 
+config PINCTRL_PFC_R8A77990
+	bool "Renesas RCar Gen3 R8A77990 pin control driver"
+	def_bool y if R8A77990
+	depends on PINCTRL_PFC
+	help
+	  Support pin multiplexing control on Renesas RCar Gen3 R8A77990 SoCs.
+
+	  The driver is controlled by a device tree node which contains both
+	  the GPIO definitions and pin control functions for each available
+	  multiplex function.
+
 config PINCTRL_PFC_R8A77995
 	bool "Renesas RCar Gen3 R8A77995 pin control driver"
 	def_bool y if R8A77995