omap3: pm: Add T2 Keypad as a wakeup source

Changes for setting the padconf value for sys_nirq line which is
connected to T2 INTR1. This will fix the T2 keypad wakeup.
Signed-off-by: NLesly A M <x0080970@ti.com>
Signed-off-by: NTeerth Reddy <teerth@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-zoom-peripherals.c

@@ -24,6 +24,7 @@
 #include <plat/common.h>
 #include <plat/usb.h>
 
+#include "mux.h"
 #include "hsmmc.h"
 
 /* Zoom2 has Qwerty keyboard*/
@@ -263,9 +264,17 @@ static int __init omap_i2c_init(void)
 	return 0;
 }
 
+static void enable_board_wakeup_source(void)
+{
+	/* T2 interrupt line (keypad) */
+	omap_mux_init_signal("sys_nirq",
+		OMAP_WAKEUP_EN | OMAP_PIN_INPUT_PULLUP);
+}
+
 void __init zoom_peripherals_init(void)
 {
 	omap_i2c_init();
 	omap_serial_init();
 	usb_musb_init();
+	enable_board_wakeup_source();
 }