pinctrl: intel: Add Intel Merrifield pin controller support

This driver adds pinctrl support for Intel Merrifield. The IP block which is
called Family-Level Interface Shim is a separate entity in SoC. The GPIO driver
(gpio-intel-mid.c) will be updated accordingly to support pinctrl interface.
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/intel/Kconfig

@@ -29,6 +29,17 @@ config PINCTRL_CHERRYVIEW
 	  Cherryview/Braswell pinctrl driver provides an interface that
 	  allows configuring of SoC pins and using them as GPIOs.
 
+config PINCTRL_MERRIFIELD
+	tristate "Intel Merrifield pinctrl driver"
+	depends on X86_INTEL_MID
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	help
+	  Merrifield Family-Level Interface Shim (FLIS) driver provides an
+	  interface that allows configuring of SoC pins and using them as
+	  GPIOs.
+
 config PINCTRL_INTEL
 	tristate
 	select PINMUX

drivers/pinctrl/intel/Makefile

@@ -2,6 +2,7 @@
 
 obj-$(CONFIG_PINCTRL_BAYTRAIL)		+= pinctrl-baytrail.o
 obj-$(CONFIG_PINCTRL_CHERRYVIEW)	+= pinctrl-cherryview.o
+obj-$(CONFIG_PINCTRL_MERRIFIELD)	+= pinctrl-merrifield.o
 obj-$(CONFIG_PINCTRL_INTEL)		+= pinctrl-intel.o
 obj-$(CONFIG_PINCTRL_BROXTON)		+= pinctrl-broxton.o
 obj-$(CONFIG_PINCTRL_SUNRISEPOINT)	+= pinctrl-sunrisepoint.o