1 files changed, 64 insertions, 0 deletions
diff --git a/include/linux/ts_filter_linear.h b/include/linux/ts_filter_linear.h
new file mode 100644
index 00000000000..dab53907a90
--- /dev/null
+++ b/include/linux/ts_filter_linear.h
@@ -0,0 +1,64 @@
+#ifndef __TS_FILTER_LINEAR_H__
+#define __TS_FILTER_LINEAR_H__
+
+#include <linux/ts_filter.h>
+#include <linux/kobject.h>
+
+/*
+ * touchscreen linear filter.
+ *
+ * Copyright (C) 2008 by Openmoko, Inc.
+ * Author: Nelson Castillo <arhuaco@freaks-unidos.net>
+ *
+ */
+
+#define TS_FILTER_LINEAR_NCONSTANTS 7
+
+/* sysfs */
+
+struct ts_filter_linear;
+
+struct const_obj {
+	struct ts_filter_linear *tsfl;
+	struct kobject kobj;
+};
+
+#define to_const_obj(x) container_of(x, struct const_obj, kobj)
+
+struct const_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct const_obj *const, struct const_attribute *attr,
+			char *buf);
+	ssize_t (*store)(struct const_obj *const, struct const_attribute *attr,
+			 const char *buf, size_t count);
+};
+
+#define to_const_attr(x) container_of(x, struct const_attribute, attr)
+
+/* filter configuration */
+
+struct ts_filter_linear_configuration {
+	int constants[TS_FILTER_LINEAR_NCONSTANTS];
+	int coord0;
+	int coord1;
+};
+
+/* the filter */
+
+struct ts_filter_linear {
+	struct ts_filter tsf;
+	struct ts_filter_linear_configuration *config;
+
+	int constants[TS_FILTER_LINEAR_NCONSTANTS];
+
+	/* sysfs */
+	struct const_obj c_obj;
+	struct kobj_type const_ktype;
+	struct const_attribute kattrs[TS_FILTER_LINEAR_NCONSTANTS];
+	struct attribute *attrs[TS_FILTER_LINEAR_NCONSTANTS + 1];
+	char attr_names[TS_FILTER_LINEAR_NCONSTANTS][2];
+};
+
+extern struct ts_filter_api ts_filter_linear_api;
+
+#endif