[s3c24xx] bump to 2.6.30-rc6

[openwrt/svn-archive/archive.git] / target / linux / s3c24xx / files-2.6.30 / include / linux / touchscreen / ts_filter_chain.h

diff --git a/target/linux/s3c24xx/files-2.6.30/include/linux/touchscreen/ts_filter_chain.h b/target/linux/s3c24xx/files-2.6.30/include/linux/touchscreen/ts_filter_chain.h
new file mode 100644 (file)
index 0000000..806bffe
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/include/linux/touchscreen/ts_filter_chain.h
@@ -0,0 +1,58 @@
+#ifndef __TS_FILTER_CHAIN_H__
+#define __TS_FILTER_CHAIN_H__
+
+/*
+ * Touchscreen filter chains.
+ *
+ * (c) 2008,2009 Andy Green <andy@openmoko.com>
+ */
+
+#include "ts_filter.h"
+
+#include <linux/err.h>
+
+struct ts_filter_chain_configuration {
+       /* API to use. */
+       const struct ts_filter_api *api;
+       /* Generic filter configuration. Different for each filter. */
+       const struct ts_filter_configuration *config;
+};
+
+struct ts_filter_chain;
+
+#ifdef CONFIG_TOUCHSCREEN_FILTER
+
+/*
+ * Create a filter chain. It will allocate an array of
+ * null-terminated pointers to filters. On error it will return
+ * an error you can check with IS_ERR.
+ */
+extern struct ts_filter_chain *ts_filter_chain_create(
+       struct platform_device *pdev,
+       const struct ts_filter_chain_configuration conf[],
+       int count_coords);
+
+/* Destroy the chain. */
+extern void ts_filter_chain_destroy(struct ts_filter_chain *c);
+
+/* Clear the filter chain. */
+extern void ts_filter_chain_clear(struct ts_filter_chain *c);
+
+/*
+ * Try to get one point. Returns 0 if no points are available.
+ * coords will be used as temporal space, thus you supply a point
+ * using coords but you shouldn't rely on its value on return unless
+ * it returns a nonzero value that is not -1.
+ * If one of the filters find an error then this function will
+ * return -1.
+ */
+int ts_filter_chain_feed(struct ts_filter_chain *c, int *coords);
+
+#else /* !CONFIG_TOUCHSCREEN_FILTER */
+#define ts_filter_chain_create(pdev, config, count_coords) (NULL)
+#define ts_filter_chain_destroy(c) do { } while (0)
+#define ts_filter_chain_clear(c) do { } while (0)
+#define ts_filter_chain_feed(c, coords) (1)
+#endif
+
+#endif