Use non-void configurations

This patch defines a ts_filter_configuration structure to
avoid using void* in the filter initialization, fixing another
upstream correction. This also makes the initialization more readable.

Tested in GTA02/rev6.

Other changes:

 ~ Comment filter configuration structures.
 ~ ts_filter.c:ts_filter_chain_create improved.
 ~ Small cleanups.
 ~ More TODOs/FIXMEs.
 ~ Updated GTA02 filter configuration.
 ~ Updated GTA01 filter configuration.
 ~ Updated mach-s3c2410/include/mach/ts.h for the new ts. configuration
   structure.
 ~ Updated all the filters to use the new configuration structure.
 ~ Removed MAX_TS_FILTER_CHAIN constant that is no longer needed.

No more evil casts left it seems.

Signed-off-by: Nelson Castillo <arhuaco@freaks-unidos.net>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/input/touchscreen/ts_filter_group.h b/drivers/input/touchscreen/ts_filter_group.h
index c13b0c487df..4fc2af70608 100644
--- a/drivers/input/touchscreen/ts_filter_group.h
+++ b/drivers/input/touchscreen/ts_filter_group.h
@@ -12,10 +12,23 @@
  */
 
 struct ts_filter_group_configuration {
-	int extent;
+	/* Size of the filter. */
+	int length;
+	/*
+	 * If two points are separated by this distance or less they
+	 * are considered to be members of the same group.
+	 */
 	int close_enough;
+	/* Minimum allowed size for the biggest group in the sample set. */
 	int threshold;
+	/*
+	 * Number of times we try to get a group of points with at least
+	 * threshold points.
+	 */
 	int attempts;
+
+	/* Generic filter configuration. */
+	struct ts_filter_configuration config;
 };
 
 extern struct ts_filter_api ts_filter_group_api;