Release 4.12 include/linux/platform_data/ntc_thermistor.h

/*
 * ntc_thermistor.h - NTC Thermistors
 *
 *  Copyright (C) 2010 Samsung Electronics
 *  MyungJoo Ham <myungjoo.ham@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef _LINUX_NTC_H

#define _LINUX_NTC_H

struct iio_channel;


enum ntc_thermistor_type {
	
TYPE_NCPXXWB473,
	
TYPE_NCPXXWL333,
	
TYPE_B57330V2103,
	
TYPE_NCPXXWF104,
	
TYPE_NCPXXXH103,
};


struct ntc_thermistor_platform_data {
	/*
         * One (not both) of read_uV and read_ohm should be provided and only
         * one of the two should be provided.
         * Both functions should return negative value for an error case.
         *
         * pullup_uV, pullup_ohm, pulldown_ohm, and connect are required to use
         * read_uV()
         *
         * How to setup pullup_ohm, pulldown_ohm, and connect is
         * described at Documentation/hwmon/ntc_thermistor
         *
         * pullup/down_ohm: 0 for infinite / not-connected
         *
         * chan: iio_channel pointer to communicate with the ADC which the
         * thermistor is using for conversion of the analog values.
         */
	
int (*read_uv)(struct ntc_thermistor_platform_data *);
	
unsigned int pullup_uv;

	
unsigned int pullup_ohm;
	
unsigned int pulldown_ohm;
	


enum { NTC_CONNECTED_POSITIVE, NTC_CONNECTED_GROUND } connect;
	
struct iio_channel *chan;

	
int (*read_ohm)(void);
};

#endif /* _LINUX_NTC_H */
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