51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/* 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 */
|