pinctrl: renesas: Initial R8A779F0 PFC support

Add initial Pin Function Controller (PFC) support for the Renesas R-Car
S4-8 (R8A779F0) SoC, including bias, drive strength and voltage control.

Based on a larger patch in the BSP by LUU HOAI.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/fd8201da404b7b0897130b254380ffc97f437266.1645457792.git.geert+renesas@glider.be

drivers/pinctrl/renesas/Kconfig

@@ -37,6 +37,7 @@ config PINCTRL_RENESAS
 	select PINCTRL_PFC_R8A77990 if ARCH_R8A77990
 	select PINCTRL_PFC_R8A77995 if ARCH_R8A77995
 	select PINCTRL_PFC_R8A779A0 if ARCH_R8A779A0
+	select PINCTRL_PFC_R8A779F0 if ARCH_R8A779F0
 	select PINCTRL_RZG2L if ARCH_R9A07G044
 	select PINCTRL_RZG2L if ARCH_R9A07G054
 	select PINCTRL_PFC_SH7203 if CPU_SUBTYPE_SH7203
@@ -133,6 +134,10 @@ config PINCTRL_PFC_R8A77961
 	bool "pin control support for R-Car M3-W+" if COMPILE_TEST
 	select PINCTRL_SH_PFC
 
+config PINCTRL_PFC_R8A779F0
+	bool "pin control support for R-Car S4-8" if COMPILE_TEST
+	select PINCTRL_SH_PFC
+
 config PINCTRL_PFC_R8A7792
 	bool "pin control support for R-Car V2H" if COMPILE_TEST
 	select PINCTRL_SH_PFC

drivers/pinctrl/renesas/Makefile

@@ -30,6 +30,7 @@ obj-$(CONFIG_PINCTRL_PFC_R8A77980)	+= pfc-r8a77980.o
 obj-$(CONFIG_PINCTRL_PFC_R8A77990)	+= pfc-r8a77990.o
 obj-$(CONFIG_PINCTRL_PFC_R8A77995)	+= pfc-r8a77995.o
 obj-$(CONFIG_PINCTRL_PFC_R8A779A0)	+= pfc-r8a779a0.o
+obj-$(CONFIG_PINCTRL_PFC_R8A779F0)	+= pfc-r8a779f0.o
 obj-$(CONFIG_PINCTRL_PFC_SH7203)	+= pfc-sh7203.o
 obj-$(CONFIG_PINCTRL_PFC_SH7264)	+= pfc-sh7264.o
 obj-$(CONFIG_PINCTRL_PFC_SH7269)	+= pfc-sh7269.o

drivers/pinctrl/renesas/core.c

@@ -636,6 +636,12 @@ static const struct of_device_id sh_pfc_of_table[] = {
 		.data = &r8a779a0_pinmux_info,
 	},
 #endif
+#ifdef CONFIG_PINCTRL_PFC_R8A779F0
+	{
+		.compatible = "renesas,pfc-r8a779f0",
+		.data = &r8a779f0_pinmux_info,
+	},
+#endif
 #ifdef CONFIG_PINCTRL_PFC_SH73A0
 	{
 		.compatible = "renesas,pfc-sh73a0",

drivers/pinctrl/renesas/sh_pfc.h

@@ -324,6 +324,7 @@ extern const struct sh_pfc_soc_info r8a77980_pinmux_info;
 extern const struct sh_pfc_soc_info r8a77990_pinmux_info;
 extern const struct sh_pfc_soc_info r8a77995_pinmux_info;
 extern const struct sh_pfc_soc_info r8a779a0_pinmux_info;
+extern const struct sh_pfc_soc_info r8a779f0_pinmux_info;
 extern const struct sh_pfc_soc_info sh7203_pinmux_info;
 extern const struct sh_pfc_soc_info sh7264_pinmux_info;
 extern const struct sh_pfc_soc_info sh7269_pinmux_info;