51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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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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#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_B57330V2103,
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TYPE_B57891S0103,
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TYPE_NCPXXWB473,
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TYPE_NCPXXWF104,
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TYPE_NCPXXWL333,
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TYPE_NCPXXXH103,
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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.rst
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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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