Merge tag 'staging-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging tree changes from Greg Kroah-Hartman:
 "Here is the big staging tree pull request for the 3.5-rc1 merge
  window.

  Loads of changes here, and we just narrowly added more lines than we
  added:
   622 files changed, 28356 insertions(+), 26059 deletions(-)

  But, good news is that there is a number of subsystems that moved out
  of the staging tree, to their respective "real" portions of the
  kernel.

  Code that moved out was:
	- iio core code
	- mei driver
	- vme core and bridge drivers

  There was one broken network driver that moved into staging as a step
  before it is removed from the tree (pc300), and there was a few new
  drivers added to the tree:
	- new iio drivers
	- gdm72xx wimax USB driver
	- ipack subsystem and 2 drivers

  All of the movements around have acks from the various subsystem
  maintainers, and all of this has been in the linux-next tree for a
  while.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

Fixed up various trivial conflicts, along with a non-trivial one found
in -next and pointed out by Olof Johanssen: a clean - but incorrect -
merge of the arch/arm/boot/dts/at91sam9g20.dtsi file.  Fix up manually
as per Stephen Rothwell.

* tag 'staging-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (536 commits)
  Staging: bcm: Remove two unused variables from Adapter.h
  Staging: bcm: Removes the volatile type definition from Adapter.h
  Staging: bcm: Rename all "INT" to "int" in Adapter.h
  Staging: bcm: Fix warning: __packed vs. __attribute__((packed)) in Adapter.h
  Staging: bcm: Correctly format all comments in Adapter.h
  Staging: bcm: Fix all whitespace issues in Adapter.h
  Staging: bcm: Properly format braces in Adapter.h
  Staging: ipack/bridges/tpci200: remove unneeded casts
  Staging: ipack/bridges/tpci200: remove TPCI200_SHORTNAME constant
  Staging: ipack: remove board_name and bus_name fields from struct ipack_device
  Staging: ipack: improve the register of a bus and a device in the bus.
  staging: comedi: cleanup all the comedi_driver 'detach' functions
  staging: comedi: remove all 'default N' in Kconfig
  staging: line6/config.h: Delete unused header
  staging: gdm72xx depends on NET
  staging: gdm72xx: Set up parent link in sysfs for gdm72xx devices
  staging: drm/omap: initial dmabuf/prime import support
  staging: drm/omap: dmabuf/prime mmap support
  pstore/ram: Add ECC support
  pstore/ram: Switch to persistent_ram routines
  ...

1 files changed, 191 insertions, 0 deletions

diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h
new file mode 100644
index 000000000000..fb0fe46fd659
--- /dev/null
+++ b/include/linux/iio/buffer.h
@@ -0,0 +1,191 @@
+/* The industrial I/O core - generic buffer interfaces.
+ *
+ * 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_BUFFER_GENERIC_H_
+#define _IIO_BUFFER_GENERIC_H_
+#include <linux/sysfs.h>
+#include <linux/iio/iio.h>
+
+#ifdef CONFIG_IIO_BUFFER
+
+struct iio_buffer;
+
+/**
+ * struct iio_buffer_access_funcs - access functions for buffers.
+ * @store_to:           actually store stuff to the buffer
+ * @read_first_n:       try to get a specified number of bytes (must exist)
+ * @request_update:     if a parameter change has been marked, update underlying
+ *                      storage.
+ * @get_bytes_per_datum:get current bytes per datum
+ * @set_bytes_per_datum:set number of bytes per datum
+ * @get_length:         get number of datums in buffer
+ * @set_length:         set number of datums in buffer
+ *
+ * The purpose of this structure is to make the buffer element
+ * modular as event for a given driver, different usecases may require
+ * different buffer designs (space efficiency vs speed for example).
+ *
+ * It is worth noting that a given buffer implementation may only support a
+ * small proportion of these functions.  The core code 'should' cope fine with
+ * any of them not existing.
+ **/
+struct iio_buffer_access_funcs {
+        int (*store_to)(struct iio_buffer *buffer, u8 *data, s64 timestamp);
+        int (*read_first_n)(struct iio_buffer *buffer,
+                            size_t n,
+                            char __user *buf);
+
+        int (*request_update)(struct iio_buffer *buffer);
+
+        int (*get_bytes_per_datum)(struct iio_buffer *buffer);
+        int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd);
+        int (*get_length)(struct iio_buffer *buffer);
+        int (*set_length)(struct iio_buffer *buffer, int length);
+};
+
+/**
+ * struct iio_buffer - general buffer structure
+ * @length:             [DEVICE] number of datums in buffer
+ * @bytes_per_datum:    [DEVICE] size of individual datum including timestamp
+ * @scan_el_attrs:      [DRIVER] control of scan elements if that scan mode
+ *                      control method is used
+ * @scan_mask:          [INTERN] bitmask used in masking scan mode elements
+ * @scan_timestamp:     [INTERN] does the scan mode include a timestamp
+ * @access:             [DRIVER] buffer access functions associated with the
+ *                      implementation.
+ * @scan_el_dev_attr_list:[INTERN] list of scan element related attributes.
+ * @scan_el_group:      [DRIVER] attribute group for those attributes not
+ *                      created from the iio_chan_info array.
+ * @pollq:              [INTERN] wait queue to allow for polling on the buffer.
+ * @stufftoread:        [INTERN] flag to indicate new data.
+ * @demux_list:         [INTERN] list of operations required to demux the scan.
+ * @demux_bounce:       [INTERN] buffer for doing gather from incoming scan.
+ **/
+struct iio_buffer {
+        int                                     length;
+        int                                     bytes_per_datum;
+        struct attribute_group                  *scan_el_attrs;
+        long                                    *scan_mask;
+        bool                                    scan_timestamp;
+        const struct iio_buffer_access_funcs    *access;
+        struct list_head                        scan_el_dev_attr_list;
+        struct attribute_group                  scan_el_group;
+        wait_queue_head_t                       pollq;
+        bool                                    stufftoread;
+        const struct attribute_group *attrs;
+        struct list_head                        demux_list;
+        unsigned char                           *demux_bounce;
+};
+
+/**
+ * iio_buffer_init() - Initialize the buffer structure
+ * @buffer: buffer to be initialized
+ **/
+void iio_buffer_init(struct iio_buffer *buffer);
+
+/**
+ * __iio_update_buffer() - update common elements of buffers
+ * @buffer:             buffer that is the event source
+ * @bytes_per_datum:    size of individual datum including timestamp
+ * @length:             number of datums in buffer
+ **/
+static inline void __iio_update_buffer(struct iio_buffer *buffer,
+                                       int bytes_per_datum, int length)
+{
+        buffer->bytes_per_datum = bytes_per_datum;
+        buffer->length = length;
+}
+
+int iio_scan_mask_query(struct iio_dev *indio_dev,
+                        struct iio_buffer *buffer, int bit);
+
+/**
+ * iio_scan_mask_set() - set particular bit in the scan mask
+ * @buffer: the buffer whose scan mask we are interested in
+ * @bit: the bit to be set.
+ **/
+int iio_scan_mask_set(struct iio_dev *indio_dev,
+                      struct iio_buffer *buffer, int bit);
+
+/**
+ * iio_push_to_buffer() - push to a registered buffer.
+ * @buffer:             IIO buffer structure for device
+ * @scan:               Full scan.
+ * @timestamp:
+ */
+int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data,
+                       s64 timestamp);
+
+int iio_update_demux(struct iio_dev *indio_dev);
+
+/**
+ * iio_buffer_register() - register the buffer with IIO core
+ * @indio_dev: device with the buffer to be registered
+ **/
+int iio_buffer_register(struct iio_dev *indio_dev,
+                        const struct iio_chan_spec *channels,
+                        int num_channels);
+
+/**
+ * iio_buffer_unregister() - unregister the buffer from IIO core
+ * @indio_dev: the device with the buffer to be unregistered
+ **/
+void iio_buffer_unregister(struct iio_dev *indio_dev);
+
+/**
+ * iio_buffer_read_length() - attr func to get number of datums in the buffer
+ **/
+ssize_t iio_buffer_read_length(struct device *dev,
+                               struct device_attribute *attr,
+                               char *buf);
+/**
+ * iio_buffer_write_length() - attr func to set number of datums in the buffer
+ **/
+ssize_t iio_buffer_write_length(struct device *dev,
+                              struct device_attribute *attr,
+                              const char *buf,
+                              size_t len);
+/**
+ * iio_buffer_store_enable() - attr to turn the buffer on
+ **/
+ssize_t iio_buffer_store_enable(struct device *dev,
+                                struct device_attribute *attr,
+                                const char *buf,
+                                size_t len);
+/**
+ * iio_buffer_show_enable() - attr to see if the buffer is on
+ **/
+ssize_t iio_buffer_show_enable(struct device *dev,
+                               struct device_attribute *attr,
+                               char *buf);
+#define IIO_BUFFER_LENGTH_ATTR DEVICE_ATTR(length, S_IRUGO | S_IWUSR,   \
+                                           iio_buffer_read_length,      \
+                                           iio_buffer_write_length)
+
+#define IIO_BUFFER_ENABLE_ATTR DEVICE_ATTR(enable, S_IRUGO | S_IWUSR,   \
+                                           iio_buffer_show_enable,      \
+                                           iio_buffer_store_enable)
+
+int iio_sw_buffer_preenable(struct iio_dev *indio_dev);
+
+#else /* CONFIG_IIO_BUFFER */
+
+static inline int iio_buffer_register(struct iio_dev *indio_dev,
+                                           struct iio_chan_spec *channels,
+                                           int num_channels)
+{
+        return 0;
+}
+
+static inline void iio_buffer_unregister(struct iio_dev *indio_dev)
+{};
+
+#endif /* CONFIG_IIO_BUFFER */
+
+#endif /* _IIO_BUFFER_GENERIC_H_ */