input: Touchscreen driver for TPS6507x

Add touch screen input driver for TPS6507x family of multi-function
chips.  Uses the TPS6507x MFD driver.  No interrupt support due to
testing limitations of current hardware.

Signed-off-by: Todd Fischer <todd.fischer@ridgerun.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/include/linux/mfd/tps6507x.h b/include/linux/mfd/tps6507x.h
index 9543cb7..c923e48 100644
--- a/include/linux/mfd/tps6507x.h
+++ b/include/linux/mfd/tps6507x.h
@@ -142,6 +142,7 @@
 
 struct tps6507x_board {
 	struct regulator_init_data *tps6507x_pmic_init_data;
+	struct touchscreen_init_data *tps6507x_ts_init_data;
 };
 
 /**
@@ -162,6 +163,7 @@
 
 	/* Client devices */
 	struct tps6507x_pmic *pmic;
+	struct tps6507x_ts *ts;
 };
 
 #endif /*  __LINUX_MFD_TPS6507X_H */