BACKPORT: iio: Export userspace IIO headers

After UAPI header file split [1] all user-kernel interfaces were
placed under include/uapi/.

This patch moves IIO user specific API from:
	* include/linux/iio/events.h => include/uapi/linux/iio/events.h
	* include/linux/types.h => include/uapi/linux/types.h

Now there is no need for nasty tricks to compile userspace programs
(e.g iio_event_monitor). Just installing the kernel headers with
make headers_install command does the job.

[1] http://lwn.net/Articles/507794/

Change-Id: I57f57f83d25a2716a3fb0722e68841049f32ff7b
Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

6 files changed, 121 insertions, 87 deletions

diff --git a/include/linux/iio/events.h b/include/linux/iio/events.h
index 03fa332ad2a..8ad87d1c534 100644
--- a/include/linux/iio/events.h
+++ b/include/linux/iio/events.h
@@ -9,22 +9,8 @@
 #ifndef _IIO_EVENTS_H_
 #define _IIO_EVENTS_H_
 
-#include <linux/ioctl.h>
-#include <linux/types.h>
 #include <linux/iio/types.h>
-
-/**
- * struct iio_event_data - The actual event being pushed to userspace
- * @id:		event identifier
- * @timestamp:	best estimate of time of event occurrence (often from
- *		the interrupt handler)
- */
-struct iio_event_data {
-	__u64	id;
-	__s64	timestamp;
-};
-
-#define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
+#include <uapi/linux/iio/events.h>
 
 /**
  * IIO_EVENT_CODE() - create event identifier
@@ -70,18 +56,4 @@ struct iio_event_data {
 #define IIO_UNMOD_EVENT_CODE(chan_type, number, type, direction)	\
 	IIO_EVENT_CODE(chan_type, 0, 0, direction, type, number, 0, 0)
 
-#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
-
-#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0x7F)
-
-#define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
-
-/* Event code number extraction depends on which type of event we have.
- * Perhaps review this function in the future*/
-#define IIO_EVENT_CODE_EXTRACT_CHAN(mask) ((__s16)(mask & 0xFFFF))
-#define IIO_EVENT_CODE_EXTRACT_CHAN2(mask) ((__s16)(((mask) >> 16) & 0xFFFF))
-
-#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
-#define IIO_EVENT_CODE_EXTRACT_DIFF(mask) (((mask) >> 55) & 0x1)
-
 #endif
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 12ab174c6ea..222a1d22c4f 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -10,58 +10,7 @@
 #ifndef _IIO_TYPES_H_
 #define _IIO_TYPES_H_
 
-enum iio_chan_type {
-	IIO_VOLTAGE,
-	IIO_CURRENT,
-	IIO_POWER,
-	IIO_ACCEL,
-	IIO_ANGL_VEL,
-	IIO_MAGN,
-	IIO_LIGHT,
-	IIO_INTENSITY,
-	IIO_PROXIMITY,
-	IIO_TEMP,
-	IIO_INCLI,
-	IIO_ROT,
-	IIO_ANGL,
-	IIO_TIMESTAMP,
-	IIO_CAPACITANCE,
-	IIO_ALTVOLTAGE,
-	IIO_CCT,
-	IIO_PRESSURE,
-	IIO_HUMIDITYRELATIVE,
-};
-
-enum iio_modifier {
-	IIO_NO_MOD,
-	IIO_MOD_X,
-	IIO_MOD_Y,
-	IIO_MOD_Z,
-	IIO_MOD_X_AND_Y,
-	IIO_MOD_X_AND_Z,
-	IIO_MOD_Y_AND_Z,
-	IIO_MOD_X_AND_Y_AND_Z,
-	IIO_MOD_X_OR_Y,
-	IIO_MOD_X_OR_Z,
-	IIO_MOD_Y_OR_Z,
-	IIO_MOD_X_OR_Y_OR_Z,
-	IIO_MOD_LIGHT_BOTH,
-	IIO_MOD_LIGHT_IR,
-	IIO_MOD_ROOT_SUM_SQUARED_X_Y,
-	IIO_MOD_SUM_SQUARED_X_Y_Z,
-	IIO_MOD_LIGHT_CLEAR,
-	IIO_MOD_LIGHT_RED,
-	IIO_MOD_LIGHT_GREEN,
-	IIO_MOD_LIGHT_BLUE,
-};
-
-enum iio_event_type {
-	IIO_EV_TYPE_THRESH,
-	IIO_EV_TYPE_MAG,
-	IIO_EV_TYPE_ROC,
-	IIO_EV_TYPE_THRESH_ADAPTIVE,
-	IIO_EV_TYPE_MAG_ADAPTIVE,
-};
+#include <uapi/linux/iio/types.h>
 
 enum iio_event_info {
 	IIO_EV_INFO_ENABLE,
@@ -70,12 +19,6 @@ enum iio_event_info {
 	IIO_EV_INFO_PERIOD,
 };
 
-enum iio_event_direction {
-	IIO_EV_DIR_EITHER,
-	IIO_EV_DIR_RISING,
-	IIO_EV_DIR_FALLING,
-};
-
 #define IIO_VAL_INT 1
 #define IIO_VAL_INT_PLUS_MICRO 2
 #define IIO_VAL_INT_PLUS_NANO 3
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 3ce25b5d75a..40851118556 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -5,6 +5,7 @@ header-y += caif/
 header-y += dvb/
 header-y += hdlc/
 header-y += hsi/
+header-y += iio/
 header-y += isdn/
 header-y += mmc/
 header-y += nfsd/
diff --git a/include/uapi/linux/iio/Kbuild b/include/uapi/linux/iio/Kbuild
new file mode 100644
index 00000000000..86f76d84c44
--- /dev/null
+++ b/include/uapi/linux/iio/Kbuild
@@ -0,0 +1,3 @@
+# UAPI Header export list
+header-y += events.h
+header-y += types.h
diff --git a/include/uapi/linux/iio/events.h b/include/uapi/linux/iio/events.h
new file mode 100644
index 00000000000..00bbdaed2f9
--- /dev/null
+++ b/include/uapi/linux/iio/events.h
@@ -0,0 +1,42 @@
+/* The industrial I/O - event passing to userspace
+ *
+ * Copyright (c) 2008-2011 Jonathan Cameron
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#ifndef _UAPI_IIO_EVENTS_H_
+#define _UAPI_IIO_EVENTS_H_
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+/**
+ * struct iio_event_data - The actual event being pushed to userspace
+ * @id:		event identifier
+ * @timestamp:	best estimate of time of event occurrence (often from
+ *		the interrupt handler)
+ */
+struct iio_event_data {
+	__u64	id;
+	__s64	timestamp;
+};
+
+#define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
+
+#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
+
+#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0x7F)
+
+#define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
+
+/* Event code number extraction depends on which type of event we have.
+ * Perhaps review this function in the future*/
+#define IIO_EVENT_CODE_EXTRACT_CHAN(mask) ((__s16)(mask & 0xFFFF))
+#define IIO_EVENT_CODE_EXTRACT_CHAN2(mask) ((__s16)(((mask) >> 16) & 0xFFFF))
+
+#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
+#define IIO_EVENT_CODE_EXTRACT_DIFF(mask) (((mask) >> 55) & 0x1)
+
+#endif /* _UAPI_IIO_EVENTS_H_ */
diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
new file mode 100644
index 00000000000..bfa419f64f7
--- /dev/null
+++ b/include/uapi/linux/iio/types.h
@@ -0,0 +1,73 @@
+/* industrial I/O data types needed both in and out of kernel
+ *
+ * Copyright (c) 2008 Jonathan Cameron
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#ifndef _UAPI_IIO_TYPES_H_
+#define _UAPI_IIO_TYPES_H_
+
+enum iio_chan_type {
+	IIO_VOLTAGE,
+	IIO_CURRENT,
+	IIO_POWER,
+	IIO_ACCEL,
+	IIO_ANGL_VEL,
+	IIO_MAGN,
+	IIO_LIGHT,
+	IIO_INTENSITY,
+	IIO_PROXIMITY,
+	IIO_TEMP,
+	IIO_INCLI,
+	IIO_ROT,
+	IIO_ANGL,
+	IIO_TIMESTAMP,
+	IIO_CAPACITANCE,
+	IIO_ALTVOLTAGE,
+	IIO_CCT,
+	IIO_PRESSURE,
+	IIO_HUMIDITYRELATIVE,
+};
+
+enum iio_modifier {
+	IIO_NO_MOD,
+	IIO_MOD_X,
+	IIO_MOD_Y,
+	IIO_MOD_Z,
+	IIO_MOD_X_AND_Y,
+	IIO_MOD_X_AND_Z,
+	IIO_MOD_Y_AND_Z,
+	IIO_MOD_X_AND_Y_AND_Z,
+	IIO_MOD_X_OR_Y,
+	IIO_MOD_X_OR_Z,
+	IIO_MOD_Y_OR_Z,
+	IIO_MOD_X_OR_Y_OR_Z,
+	IIO_MOD_LIGHT_BOTH,
+	IIO_MOD_LIGHT_IR,
+	IIO_MOD_ROOT_SUM_SQUARED_X_Y,
+	IIO_MOD_SUM_SQUARED_X_Y_Z,
+	IIO_MOD_LIGHT_CLEAR,
+	IIO_MOD_LIGHT_RED,
+	IIO_MOD_LIGHT_GREEN,
+	IIO_MOD_LIGHT_BLUE,
+};
+
+enum iio_event_type {
+	IIO_EV_TYPE_THRESH,
+	IIO_EV_TYPE_MAG,
+	IIO_EV_TYPE_ROC,
+	IIO_EV_TYPE_THRESH_ADAPTIVE,
+	IIO_EV_TYPE_MAG_ADAPTIVE,
+};
+
+enum iio_event_direction {
+	IIO_EV_DIR_EITHER,
+	IIO_EV_DIR_RISING,
+	IIO_EV_DIR_FALLING,
+};
+
+#endif /* _UAPI_IIO_TYPES_H_ */
+