Commit | Line | Data |
---|---|---|
f22aaaa7 DK |
1 | /* |
2 | * ntc_thermistor.h - NTC Thermistors | |
3 | * | |
4 | * Copyright (C) 2010 Samsung Electronics | |
5 | * MyungJoo Ham <myungjoo.ham@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #ifndef _LINUX_NTC_H | |
22 | #define _LINUX_NTC_H | |
23 | ||
9e8269de NKC |
24 | struct iio_channel; |
25 | ||
f22aaaa7 DK |
26 | enum ntc_thermistor_type { |
27 | TYPE_NCPXXWB473, | |
28 | TYPE_NCPXXWL333, | |
29 | }; | |
30 | ||
31 | struct ntc_thermistor_platform_data { | |
32 | /* | |
33 | * One (not both) of read_uV and read_ohm should be provided and only | |
34 | * one of the two should be provided. | |
35 | * Both functions should return negative value for an error case. | |
36 | * | |
37 | * pullup_uV, pullup_ohm, pulldown_ohm, and connect are required to use | |
38 | * read_uV() | |
39 | * | |
40 | * How to setup pullup_ohm, pulldown_ohm, and connect is | |
395cf969 | 41 | * described at Documentation/hwmon/ntc_thermistor |
f22aaaa7 DK |
42 | * |
43 | * pullup/down_ohm: 0 for infinite / not-connected | |
9e8269de NKC |
44 | * |
45 | * chan: iio_channel pointer to communicate with the ADC which the | |
46 | * thermistor is using for conversion of the analog values. | |
f22aaaa7 | 47 | */ |
088ce2ac GR |
48 | int (*read_uv)(struct ntc_thermistor_platform_data *); |
49 | unsigned int pullup_uv; | |
f22aaaa7 DK |
50 | |
51 | unsigned int pullup_ohm; | |
52 | unsigned int pulldown_ohm; | |
53 | enum { NTC_CONNECTED_POSITIVE, NTC_CONNECTED_GROUND } connect; | |
9e8269de | 54 | struct iio_channel *chan; |
f22aaaa7 DK |
55 | |
56 | int (*read_ohm)(void); | |
57 | }; | |
58 | ||
59 | #endif /* _LINUX_NTC_H */ |