gpio: add Intel Moorestown Platform Langwell chip gpio driver

The Langwell chip is the IO hub for Intel Moorestown platform which has a
64-pin gpio block device inside.  It is exposed as a dedicated PCI device.
 We use it to control outside peripheral as well as to do IRQ demuxing.
The gpio block uses MSI to send level type interrupt to IOAPIC.

Signed-off-by: Alek Du <alek.du@intel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index ccca08e..9ad20ff 100644 (file)
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -180,6 +180,12 @@ config GPIO_BT8XX
 
          If unsure, say N.
 
+config GPIO_LANGWELL
+       bool "Intel Moorestown Platform Langwell GPIO support"
+       depends on PCI
+       help
+         Say Y here to support Intel Moorestown platform GPIO.
+
 comment "SPI GPIO expanders:"
 
 config GPIO_MAX7301

diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index c1ac034..b8eef76 100644 (file)
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -4,6 +4,7 @@ ccflags-$(CONFIG_DEBUG_GPIO)    += -DDEBUG
 
 obj-$(CONFIG_GPIOLIB)          += gpiolib.o
 
+obj-$(CONFIG_GPIO_LANGWELL)    += langwell_gpio.o
 obj-$(CONFIG_GPIO_MAX7301)     += max7301.o
 obj-$(CONFIG_GPIO_MAX732X)     += max732x.o
 obj-$(CONFIG_GPIO_MC33880)     += mc33880.o

diff --cc drivers/gpio/langwell_gpio.c
Simple merge