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-rw-r--r--include/linux/platform_data/ntc_thermistor.h50
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diff --git a/include/linux/platform_data/ntc_thermistor.h b/include/linux/platform_data/ntc_thermistor.h
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+++ b/include/linux/platform_data/ntc_thermistor.h
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+/* 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 */