projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| f22aaaa7 DK |
2 | /* |
| 3 | * ntc_thermistor.h - NTC Thermistors | |
| 4 | * | |
| 5 | * Copyright (C) 2010 Samsung Electronics | |
| 6 | * MyungJoo Ham <myungjoo.ham@samsung.com> | |
| f22aaaa7 DK |
7 | */ |
| 8 | #ifndef _LINUX_NTC_H | |
| 9 | #define _LINUX_NTC_H | |
| 10 | ||
| 9e8269de NKC |
11 | struct iio_channel; |
| 12 | ||
| f22aaaa7 | 13 | enum ntc_thermistor_type { |
| ed67f087 | 14 | TYPE_B57330V2103, |
| 737c086e PR |
15 | TYPE_B57891S0103, |
| 16 | TYPE_NCPXXWB473, | |
| 887ee434 | 17 | TYPE_NCPXXWF104, |
| 737c086e | 18 | TYPE_NCPXXWL333, |
| 54ce3a0d | 19 | TYPE_NCPXXXH103, |
| f22aaaa7 DK |
20 | }; |
| 21 | ||
| 22 | struct ntc_thermistor_platform_data { | |
| 23 | /* | |
| 24 | * One (not both) of read_uV and read_ohm should be provided and only | |
| 25 | * one of the two should be provided. | |
| 26 | * Both functions should return negative value for an error case. | |
| 27 | * | |
| 28 | * pullup_uV, pullup_ohm, pulldown_ohm, and connect are required to use | |
| 29 | * read_uV() | |
| 30 | * | |
| 31 | * How to setup pullup_ohm, pulldown_ohm, and connect is | |
| 7ebd8b66 | 32 | * described at Documentation/hwmon/ntc_thermistor.rst |
| f22aaaa7 DK |
33 | * |
| 34 | * pullup/down_ohm: 0 for infinite / not-connected | |
| 9e8269de NKC |
35 | * |
| 36 | * chan: iio_channel pointer to communicate with the ADC which the | |
| 37 | * thermistor is using for conversion of the analog values. | |
| f22aaaa7 | 38 | */ |
| 088ce2ac GR |
39 | int (*read_uv)(struct ntc_thermistor_platform_data *); |
| 40 | unsigned int pullup_uv; | |
| f22aaaa7 DK |
41 | |
| 42 | unsigned int pullup_ohm; | |
| 43 | unsigned int pulldown_ohm; | |
| 44 | enum { NTC_CONNECTED_POSITIVE, NTC_CONNECTED_GROUND } connect; | |
| 9e8269de | 45 | struct iio_channel *chan; |
| f22aaaa7 DK |
46 | |
| 47 | int (*read_ohm)(void); | |
| 48 | }; | |
| 49 | ||
| 50 | #endif /* _LINUX_NTC_H */ |