Add touchscreen filters

Add filter source code and add it to the defconfig.

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

1 files changed, 36 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/ts_filter_group.h b/drivers/input/touchscreen/ts_filter_group.h
new file mode 100644
index 00000000000..d1e3590e936
--- /dev/null
+++ b/drivers/input/touchscreen/ts_filter_group.h
@@ -0,0 +1,36 @@
+#ifndef __TS_FILTER_GROUP_H__
+#define __TS_FILTER_GROUP_H__
+
+#include "ts_filter.h"
+
+/*
+ * Touchscreen group filter.
+ *
+ * Copyright (C) 2008,2009 by Openmoko, Inc.
+ * Author: Nelson Castillo <arhuaco@freaks-unidos.net>
+ *
+ */
+
+struct ts_filter_group_configuration {
+	/* 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 const struct ts_filter_api ts_filter_group_api;
+
+#endif