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#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
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