mrst_max3110: add UART driver for Max3110 on Moorestown

This driver enable the max3110 device, it can be used as
a system console. the IRQ needs be enabled if user want a
better performance. MRST max3110 works in 3.684MHz clock,
which supports 230400 as its maximum rate.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/serial/Kconfig

@@ -690,6 +690,23 @@ config SERIAL_SA1100_CONSOLE
 	  your boot loader (lilo or loadlin) about how to pass options to the
 	  kernel at boot time.)
 
+config SERIAL_MRST_MAX3110
+	tristate "SPI UART driver for Max3110"
+	depends on SPI_DW_PCI
+	select SERIAL_CORE
+	select SERIAL_CORE_CONSOLE
+	help
+	  This is the UART protocol driver for the MAX3110 device on
+	  the Intel Moorestown platform. On other systems use the max3100
+	  driver.
+
+config MRST_MAX3110_IRQ
+	boolean "Enable GPIO IRQ for Max3110 over Moorestown"
+	default n
+	depends on SERIAL_MRST_MAX3110 && GPIO_LANGWELL
+	help
+	  This has to be enabled after Moorestown GPIO driver is loaded
+
 config SERIAL_BFIN
 	tristate "Blackfin serial port support"
 	depends on BLACKFIN

drivers/serial/Makefile

@@ -84,3 +84,4 @@ obj-$(CONFIG_SERIAL_TIMBERDALE)	+= timbuart.o
 obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o
 obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o
 obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o
+obj-$(CONFIG_SERIAL_MRST_MAX3110)	+= mrst_max3110.o