Added missing tegra files.HEADmaster

1 files changed, 75 insertions, 0 deletions

diff --git a/drivers/staging/iio/chrdev.h b/drivers/staging/iio/chrdev.h
new file mode 100644
index 00000000000..3e31ee6220e
--- /dev/null
+++ b/drivers/staging/iio/chrdev.h
@@ -0,0 +1,75 @@
+/* The industrial I/O core - character device related
+ *
+ * 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 _IIO_CHRDEV_H_
+#define _IIO_CHRDEV_H_
+struct iio_dev;
+
+/**
+ * struct iio_handler - Structure used to specify file operations
+ *                      for a particular chrdev
+ * @chrdev:     character device structure
+ * @id:         the location in the handler table - used for deallocation.
+ * @flags:      file operations related flags including busy flag.
+ * @private:    handler specific data used by the fileops registered with
+ *              the chrdev.
+ */
+struct iio_handler {
+        struct cdev     chrdev;
+        int             id;
+        unsigned long   flags;
+        void            *private;
+};
+
+#define iio_cdev_to_handler(cd)                         \
+        container_of(cd, struct iio_handler, chrdev)
+
+/**
+ * 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 {
+        int     id;
+        s64     timestamp;
+};
+
+/**
+ * struct iio_detected_event_list - list element for events that have occurred
+ * @list:               linked list header
+ * @ev:                 the event itself
+ */
+struct iio_detected_event_list {
+        struct list_head                list;
+        struct iio_event_data           ev;
+};
+
+/**
+ * struct iio_event_interface - chrdev interface for an event line
+ * @dev:                device assocated with event interface
+ * @handler:            fileoperations and related control for the chrdev
+ * @wait:               wait queue to allow blocking reads of events
+ * @event_list_lock:    mutex to protect the list of detected events
+ * @det_events:         list of detected events
+ * @max_events:         maximum number of events before new ones are dropped
+ * @current_events:     number of events in detected list
+ */
+struct iio_event_interface {
+        struct device                           dev;
+        struct iio_handler                      handler;
+        wait_queue_head_t                       wait;
+        struct mutex                            event_list_lock;
+        struct list_head                        det_events;
+        int                                     max_events;
+        int                                     current_events;
+        struct list_head dev_attr_list;
+};
+
+#endif