qcom-adc/adc-averaging.h

/*
 * ./kernel_modules/qcom-adc/adc_averaging.h
 *
 * This is the header file for adc_averaging and defines the interface for
 * users of the averaging logic
 *
 * Author: Cradlepoint Technology, Inc.  <source@cradlepoint.com>
 *		Kyle Swenson <kswenson@cradlepoint.com>
 *
 * Copyright 2017 Cradlepoint Technology, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 */
#ifndef __ADC_AVERAGING_H__
#define __ADC_AVERAGING_H__

#include <linux/kernel.h>
#include <linux/mutex.h>

#define MAX_SAMPLE_LENGTH	128
struct adc_channel {
	uint16_t *samples;
	uint16_t total_length;
	uint16_t index;
	struct mutex lock;
	struct device * parent;
};



void free_adc_channel(struct adc_channel *ch);
struct adc_channel *create_adc_channel(struct device * dev, uint16_t fifo_length);
uint16_t compute_average(struct adc_channel *ch);
void add_sample(struct adc_channel *ch, uint16_t sample);

void show_data(struct adc_channel *ch);
int verify_average(struct adc_channel *ch);


#endif