pinctrl: introduce driver for Atmel PIO4 controller

Add a pinctrl/gpio driver for Atmel PIO4 controller available on SAMA5D2
chip family.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/Kconfig

@@ -67,6 +67,19 @@ config PINCTRL_AT91
 	help
 	  Say Y here to enable the at91 pinctrl driver
 
+config PINCTRL_AT91PIO4
+	bool "AT91 PIO4 pinctrl driver"
+	depends on OF
+	depends on ARCH_AT91
+	select PINMUX
+	select GENERIC_PINCONF
+	select GPIOLIB
+	select GPIOLIB_IRQCHIP
+	select OF_GPIO
+	help
+	  Say Y here to enable the at91 pinctrl/gpio driver for Atmel PIO4
+	  controller available on sama5d2 SoC.
+
 config PINCTRL_AMD
 	bool "AMD GPIO pin control"
 	depends on GPIOLIB

drivers/pinctrl/Makefile

@@ -12,6 +12,7 @@ obj-$(CONFIG_PINCTRL_AS3722)	+= pinctrl-as3722.o
 obj-$(CONFIG_PINCTRL_BF54x)	+= pinctrl-adi2-bf54x.o
 obj-$(CONFIG_PINCTRL_BF60x)	+= pinctrl-adi2-bf60x.o
 obj-$(CONFIG_PINCTRL_AT91)	+= pinctrl-at91.o
+obj-$(CONFIG_PINCTRL_AT91PIO4)	+= pinctrl-at91-pio4.o
 obj-$(CONFIG_PINCTRL_AMD)	+= pinctrl-amd.o
 obj-$(CONFIG_PINCTRL_DIGICOLOR)	+= pinctrl-digicolor.o
 obj-$(CONFIG_PINCTRL_FALCON)	+= pinctrl-falcon.o