| Donggeun Kim | f22aaaa | 2011-06-20 16:48:19 +0900 | [diff] [blame] | 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 | |
| Naveen Krishna Chatradhi | 9e8269d | 2013-03-13 09:38:20 +0530 | [diff] [blame] | 24 | struct iio_channel; |
| 25 | |
| Donggeun Kim | f22aaaa | 2011-06-20 16:48:19 +0900 | [diff] [blame] | 26 | enum ntc_thermistor_type { |
| 27 | TYPE_NCPXXWB473, |
| 28 | TYPE_NCPXXWL333, |
| Johannes Pointner | ed67f08 | 2014-07-01 08:05:52 +0200 | [diff] [blame] | 29 | TYPE_B57330V2103, |
| Donggeun Kim | f22aaaa | 2011-06-20 16:48:19 +0900 | [diff] [blame] | 30 | }; |
| 31 | |
| 32 | struct ntc_thermistor_platform_data { |
| 33 | /* |
| 34 | * One (not both) of read_uV and read_ohm should be provided and only |
| 35 | * one of the two should be provided. |
| 36 | * Both functions should return negative value for an error case. |
| 37 | * |
| 38 | * pullup_uV, pullup_ohm, pulldown_ohm, and connect are required to use |
| 39 | * read_uV() |
| 40 | * |
| 41 | * How to setup pullup_ohm, pulldown_ohm, and connect is |
| Paul Bolle | 395cf96 | 2011-08-15 02:02:26 +0200 | [diff] [blame] | 42 | * described at Documentation/hwmon/ntc_thermistor |
| Donggeun Kim | f22aaaa | 2011-06-20 16:48:19 +0900 | [diff] [blame] | 43 | * |
| 44 | * pullup/down_ohm: 0 for infinite / not-connected |
| Naveen Krishna Chatradhi | 9e8269d | 2013-03-13 09:38:20 +0530 | [diff] [blame] | 45 | * |
| 46 | * chan: iio_channel pointer to communicate with the ADC which the |
| 47 | * thermistor is using for conversion of the analog values. |
| Donggeun Kim | f22aaaa | 2011-06-20 16:48:19 +0900 | [diff] [blame] | 48 | */ |
| Guenter Roeck | 088ce2a | 2013-03-13 16:40:39 -0700 | [diff] [blame] | 49 | int (*read_uv)(struct ntc_thermistor_platform_data *); |
| 50 | unsigned int pullup_uv; |
| Donggeun Kim | f22aaaa | 2011-06-20 16:48:19 +0900 | [diff] [blame] | 51 | |
| 52 | unsigned int pullup_ohm; |
| 53 | unsigned int pulldown_ohm; |
| 54 | enum { NTC_CONNECTED_POSITIVE, NTC_CONNECTED_GROUND } connect; |
| Naveen Krishna Chatradhi | 9e8269d | 2013-03-13 09:38:20 +0530 | [diff] [blame] | 55 | struct iio_channel *chan; |
| Donggeun Kim | f22aaaa | 2011-06-20 16:48:19 +0900 | [diff] [blame] | 56 | |
| 57 | int (*read_ohm)(void); |
| 58 | }; |
| 59 | |
| 60 | #endif /* _LINUX_NTC_H */ |