Input: tsc2007 - add poll_delay parameter to platform data

Depending on the quality of the touch panel, the time for the X-, X+, Y-
and Y+ inputs to settle may vary. The poll_delay parameter can be used
to override the default of 1 millisecond.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Kwangwoo Lee <kwangwoo.lee@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

include/linux/i2c/tsc2007.h

@@ -7,6 +7,8 @@ struct tsc2007_platform_data {
 	u16	model;				/* 2007. */
 	u16	x_plate_ohms;
 	u16	max_rt; /* max. resistance above which samples are ignored */
+	unsigned long poll_delay; /* delay (in ms) after pen-down event
+				     before polling starts */
 
 	int	(*get_pendown_state)(void);
 	void	(*clear_penirq)(void);		/* If needed, clear 2nd level