| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * The driver is developed based on ntc_thermistor driver. |
| * |
| * Copyright 2019 Google LLC. |
| */ |
| |
| #ifndef _LINUX_PTC_H |
| #define _LINUX_PTC_H |
| |
| struct iio_channel; |
| |
| enum ptc_thermistor_type { |
| TYPE_TMP6331DECR_VBIAS_1_8_V_100000_OHM, |
| }; |
| |
| struct ptc_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 and pull_ohm, and connect are required to use |
| * read_uV() |
| * |
| * How to setup pull_ohm, and connect is |
| * described at Documentation/hwmon/ptc_thermistor |
| * |
| * pull_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 ptc_thermistor_platform_data *pdata); |
| unsigned int pullup_uv; |
| unsigned int pull_ohm; |
| enum { PTC_CONNECTED_POSITIVE, PTC_CONNECTED_GROUND } connect; |
| struct iio_channel *chan; |
| |
| int (*read_ohm)(void); |
| |
| }; |
| |
| #endif /* _LINUX_PTC_H */ |
