Input: enable onkey driver of max8925

When ONKEY is held for 3 seconds, KEY_POWER event is reported.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 48cdabe..c44b9ea 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -80,6 +80,16 @@
 	tristate "M68k Beeper support"
 	depends on M68K
 
+config INPUT_MAX8925_ONKEY
+	tristate "MAX8925 ONKEY support"
+	depends on MFD_MAX8925
+	help
+	  Support the ONKEY of MAX8925 PMICs as an input device
+	  reporting power button status.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called max8925_onkey.
+
 config INPUT_APANEL
 	tristate "Fujitsu Lifebook Application Panel buttons"
 	depends on X86 && I2C && LEDS_CLASS