pinctrl: Add Intel Cherryview/Braswell pin controller support

This driver supports the pin/GPIO controllers found in newer Intel SoCs
like Cherryview and Braswell. The driver provides full GPIO support and
minimal set of pin controlling funtionality.

The driver is based on the original Cherryview GPIO driver authored by Ning
Li and Alan Cox.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/intel/Kconfig

@@ -13,3 +13,15 @@ config PINCTRL_BAYTRAIL
 	  so only a small amount is available for gpio use.
 
 	  Requires ACPI device enumeration code to set up a platform device.
+
+config PINCTRL_CHERRYVIEW
+	tristate "Intel Cherryview/Braswell pinctrl and GPIO driver"
+	depends on ACPI
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	select GPIOLIB
+	select GPIOLIB_IRQCHIP
+	help
+	  Cherryview/Braswell pinctrl driver provides an interface that
+	  allows configuring of SoC pins and using them as GPIOs.

drivers/pinctrl/intel/Makefile

@@ -1,3 +1,4 @@
 # Intel pin control drivers
 
 obj-$(CONFIG_PINCTRL_BAYTRAIL)		+= pinctrl-baytrail.o
+obj-$(CONFIG_PINCTRL_CHERRYVIEW)	+= pinctrl-cherryview.o