pinctrl: add lpc18xx pinctrl driver

Pinctrl driver for the System Control Unit (SCU) found on NXP
LPC18xx/43xx devices.

Driver uses the generic pinctrl DT bindings for multiplexing
and property settings.
Signed-off-by: NJoachim Eastwood <manabian@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/Kconfig

@@ -88,6 +88,15 @@ config PINCTRL_LANTIQ
 	select PINMUX
 	select PINCONF
 
+config PINCTRL_LPC18XX
+	bool "NXP LPC18XX/43XX SCU pinctrl driver"
+	depends on OF && (ARCH_LPC18XX || COMPILE_TEST)
+	default ARCH_LPC18XX
+	select PINMUX
+	select GENERIC_PINCONF
+	help
+	  Pinctrl driver for NXP LPC18xx/43xx System Control Unit (SCU).
+
 config PINCTRL_FALCON
 	bool
 	depends on SOC_FALCON

drivers/pinctrl/Makefile

@@ -34,6 +34,7 @@ obj-$(CONFIG_PINCTRL_U300)	+= pinctrl-u300.o
 obj-$(CONFIG_PINCTRL_COH901)	+= pinctrl-coh901.o
 obj-$(CONFIG_PINCTRL_XWAY)	+= pinctrl-xway.o
 obj-$(CONFIG_PINCTRL_LANTIQ)	+= pinctrl-lantiq.o
+obj-$(CONFIG_PINCTRL_LPC18XX)	+= pinctrl-lpc18xx.o
 obj-$(CONFIG_PINCTRL_TB10X)	+= pinctrl-tb10x.o
 obj-$(CONFIG_PINCTRL_ST) 	+= pinctrl-st.o
 obj-$(CONFIG_PINCTRL_ZYNQ)	+= pinctrl-zynq.o