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50 lines
1.3 KiB
50 lines
1.3 KiB
/* 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 <[email protected]> |
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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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