Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / platform_data / ntc_thermistor.h

diff --git a/kernel/include/linux/platform_data/ntc_thermistor.h b/kernel/include/linux/platform_data/ntc_thermistor.h
new file mode 100644 (file)
index 0000000..0a6de4c
--- /dev/null
+++ b/kernel/include/linux/platform_data/ntc_thermistor.h
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+/*
+ * ntc_thermistor.h - NTC Thermistors
+ *
+ *  Copyright (C) 2010 Samsung Electronics
+ *  MyungJoo Ham <myungjoo.ham@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#ifndef _LINUX_NTC_H
+#define _LINUX_NTC_H
+
+struct iio_channel;
+
+enum ntc_thermistor_type {
+       TYPE_NCPXXWB473,
+       TYPE_NCPXXWL333,
+       TYPE_B57330V2103,
+};
+
+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
+        *
+        * 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 */