59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/*
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* ntc_thermistor.h - NTC Thermistors
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*
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* Copyright (C) 2010 Samsung Electronics
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* MyungJoo Ham <myungjoo.ham@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LINUX_NTC_H
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#define _LINUX_NTC_H
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struct iio_channel;
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enum ntc_thermistor_type {
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TYPE_NCPXXWB473,
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TYPE_NCPXXWL333,
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};
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struct ntc_thermistor_platform_data {
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/*
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* One (not both) of read_uV and read_ohm should be provided and only
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* one of the two should be provided.
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* Both functions should return negative value for an error case.
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*
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* pullup_uV, pullup_ohm, pulldown_ohm, and connect are required to use
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* read_uV()
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*
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* How to setup pullup_ohm, pulldown_ohm, and connect is
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* described at Documentation/hwmon/ntc_thermistor
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*
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* pullup/down_ohm: 0 for infinite / not-connected
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*
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* chan: iio_channel pointer to communicate with the ADC which the
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* thermistor is using for conversion of the analog values.
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*/
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int (*read_uv)(struct ntc_thermistor_platform_data *);
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unsigned int pullup_uv;
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unsigned int pullup_ohm;
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unsigned int pulldown_ohm;
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enum { NTC_CONNECTED_POSITIVE, NTC_CONNECTED_GROUND } connect;
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struct iio_channel *chan;
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int (*read_ohm)(void);
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};
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#endif /* _LINUX_NTC_H */
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