IIO: Move the core files to drivers/iio

Take the core support + the kfifo buffer implentation out of
staging.  Whilst we are far from done in improving this subsystem
it is now at a stage where the userspae interfaces (provided by
the core) can be considered stable.

Drivers will follow over a longer time scale.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 62 insertions, 0 deletions

diff --git a/drivers/iio/iio_core.h b/drivers/iio/iio_core.h
new file mode 100644
index 000000000000..f652e6ae5a35
--- /dev/null
+++ b/drivers/iio/iio_core.h
@@ -0,0 +1,62 @@
+/* The industrial I/O core function defs.
+ *
+ * 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.
+ *
+ * These definitions are meant for use only within the IIO core, not individual
+ * drivers.
+ */
+
+#ifndef _IIO_CORE_H_
+#define _IIO_CORE_H_
+#include <linux/kernel.h>
+#include <linux/device.h>
+
+struct iio_chan_spec;
+struct iio_dev;
+
+
+int __iio_add_chan_devattr(const char *postfix,
+			   struct iio_chan_spec const *chan,
+			   ssize_t (*func)(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf),
+			   ssize_t (*writefunc)(struct device *dev,
+						struct device_attribute *attr,
+						const char *buf,
+						size_t len),
+			   u64 mask,
+			   bool generic,
+			   struct device *dev,
+			   struct list_head *attr_list);
+
+/* Event interface flags */
+#define IIO_BUSY_BIT_POS 1
+
+#ifdef CONFIG_IIO_BUFFER
+struct poll_table_struct;
+
+unsigned int iio_buffer_poll(struct file *filp,
+			     struct poll_table_struct *wait);
+ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
+				      size_t n, loff_t *f_ps);
+
+
+#define iio_buffer_poll_addr (&iio_buffer_poll)
+#define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer)
+
+#else
+
+#define iio_buffer_poll_addr NULL
+#define iio_buffer_read_first_n_outer_addr NULL
+
+#endif
+
+int iio_device_register_eventset(struct iio_dev *indio_dev);
+void iio_device_unregister_eventset(struct iio_dev *indio_dev);
+int iio_event_getfd(struct iio_dev *indio_dev);
+
+#endif