gpio: add Topcliff PCH GPIO driver

Topcliff PCH is the platform controller hub that is going to be used in
Intel's upcoming general embedded platform.  All IO peripherals in
Topcliff PCH are actually devices sitting on AMBA bus.  Topcliff PCH has
GPIO I/F.  Using this I/F, it is able to access system devices connected
to GPIO.

[akpm@linux-foundation.org: ese DEFINE_PCI_DEVICE_TABLE (per Joe Perches)]
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Rabin Vincent <rabin.vincent@stericsson.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Tomoya MORINAGA <morinaga526@dsn.okisemi.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 3f3181dac8d7..dd9b4ba8d32d 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -313,6 +313,14 @@ config GPIO_LANGWELL
         help
           Say Y here to support Intel Langwell/Penwell GPIO.
 
+config GPIO_PCH
+        tristate "PCH GPIO of Intel Topcliff"
+        depends on PCI
+        help
+          This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
+          which is an IOH(Input/Output Hub) for x86 embedded processor.
+          This driver can access PCH GPIO device.
+
 config GPIO_TIMBERDALE
         bool "Support for timberdale GPIO IP"
         depends on MFD_TIMBERDALE && GPIOLIB && HAS_IOMEM