gpio: Add STMPE GPIO driver

Add support for the GPIOs on STMPE I/O Expanders.

[l.fu@pengutronix.de: fix set direction input]
[l.fu@pengutronix.de: set GPIO alternate function while requesting]
Acked-by: Luotao Fu <l.fu@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index f623953b5797..510aa2054544 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -206,6 +206,13 @@ config GPIO_SX150X
           8 bits:  sx1508q
           16 bits: sx1509q
 
+config GPIO_STMPE
+        bool "STMPE GPIOs"
+        depends on MFD_STMPE
+        help
+          This enables support for the GPIOs found on the STMPE I/O
+          Expanders.
+
 config GPIO_TC35892
         bool "TC35892 GPIOs"
         depends on MFD_TC35892