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/*
* 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,
};
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 */