| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * ntc_thermistor.h - NTC Thermistors |
| * |
| * Copyright (C) 2010 Samsung Electronics |
| * MyungJoo Ham <myungjoo.ham@samsung.com> |
| */ |
| #ifndef _LINUX_NTC_H |
| #define _LINUX_NTC_H |
| |
| struct iio_channel; |
| |
| enum ntc_thermistor_type { |
| TYPE_B57330V2103, |
| TYPE_B57891S0103, |
| TYPE_NCPXXWB473, |
| TYPE_NCPXXWF104, |
| TYPE_NCPXXWL333, |
| 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.rst |
| * |
| * 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 */ |
