gpio: Add support for Intel ICHx/3100/Series[56] GPIO

This driver works on many Intel chipsets, including the ICH6, ICH7,
ICH8, ICH9, ICH10, 3100, Series 5/3400 (Ibex Peak), Series 6/C200
(Cougar Point), and NM10 (Tiger Point).

Additional Intel chipsets should be easily supported if needed, eg the
ICH1-5, EP80579, etc.

Tested on QM67 (Cougar Point), QM57 (Ibex Peak), 3100 (Whitmore Lake),
and NM10 (Tiger Point).

Includes work from Jean Delvare:
        - Resource leak removal during module load/unload
        - GPIO API bit value enforcement

Also includes code cleanup from Guenter Roeck and Grant Likely.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index e03653d69357..a0d57964d31c 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -178,6 +178,19 @@ config GPIO_SCH
           The Intel Tunnel Creek processor has 5 GPIOs powered by the
           core power rail and 9 from suspend power supply.
 
+config GPIO_ICH
+        tristate "Intel ICH GPIO"
+        depends on PCI && X86
+        select MFD_CORE
+        select LPC_ICH
+        help
+          Say yes here to support the GPIO functionality of a number of Intel
+          ICH-based chipsets.  Currently supported devices: ICH6, ICH7, ICH8
+          ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg
+          Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake).
+
+          If unsure, say N.
+
 config GPIO_VX855
         tristate "VIA VX855/VX875 GPIO"
         depends on PCI