staging: iio partial documentation update

Signed-off-by: Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/Documentation/ring.txt

@@ -47,10 +47,8 @@ request_update
   If parameters have changed that require reinitialization or configuration of
   the ring buffer this will trigger it.
 
-get_bpd, set_bpd
+get_bytes_per_datum, set_bytes_per_datum
-  Get/set the number of bytes for a given reading (single element, not sample set)
+  Get/set the number of bytes for a complete scan. (All samples + timestamp)
-  The value of bps (bytes per set) is created from a combination of this and the
-  enabled scan elements.
 
 get_length / set_length
   Get/set the number of sample sets that may be held by the buffer.

drivers/staging/iio/Documentation/sysfs-class-iio

@@ -158,7 +158,7 @@ Contact:	linux-iio@vger.kernel.org
 Description:
 		Magnetic field along axis x, y or z (may be arbitrarily assigned)
 		channel m (not present if only one magnetometer at this orientation).
-		Data converted by application of offset then scale to Gauss
+		Data converted by application of offset then scale to Gauss.
 		Has all the equivalent modifiers as per in[m].
 
 What:		/sys/.../device[n]/device[n]:event[m]
@@ -212,39 +212,6 @@ Description:
 		The actual value of the threshold in raw device units obtained by
 		 reverse application of scale and offfset to the acceleration in m/s^2.
 
-What:		/sys/.../device[n]/scan_elements
-KernelVersion:	2.6.35
-Contact:	linux-iio@vger.kernel.org
-Description:
-		Directory containing interfaces for elements that will be captured
-		for a single triggered sample set in the buffer.
-
-What:		/sys/.../device[n]/scan_elements/[m]_accel_x0_en
-KernelVersion:	2.6.35
-Contact:	linux-iio@vger.kernel.org
-Description:
-		Scan element control for triggered data capture. m implies the
-		ordering within the buffer. Next the type is specified with
-		modifier and channel number as per the sysfs single channel
-		access above.
-
-What:		/sys/.../device[n]/scan_elements/accel[_x0]_precision
-KernelVersion:	2.6.35
-Contact:	linux-iio@vger.kernel.org
-Description:
-		Scan element precision within the buffer. Note that the
-		data alignment must restrictions must be read from within
-		buffer to work out full data alignment for data read
-		via buffer_access chrdev. _x0 dropped if shared across all
-		acceleration channels.
-
-What:		/sys/.../device[n]/scan_elements/accel[_x0]_shift
-KernelVersion:	2.6.35
-Contact:	linux-iio@vger.kernel.org
-Description:
-		A bit shift (to right) that must be applied prior to
-		extracting the bits specified by accel[_x0]_precision.
-
 What:		/sys/.../device[n]/device[n]:buffer:event/dev
 KernelVersion:	2.6.35
 Contact:	linux-iio@vger.kernel.org
@@ -270,8 +237,8 @@ Contact:	linux-iio@vger.kernel.org
 Description:
 		Number of scans contained by the buffer.
 
-What:		/sys/.../device[n]:buffer/bps
+What:		/sys/.../device[n]:buffer/bytes_per_datum
-KernelVersion:	2.6.35
+KernelVersion:	2.6.37
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Bytes per scan.  Due to alignment fun, the scan may be larger
@@ -292,3 +259,36 @@ Description:
 		to the nearest power of 2 times this.  (may not be true in weird
 		hardware buffers that pack data well)
 
+What:		/sys/.../device[n]/buffer/scan_elements
+KernelVersion:	2.6.37
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Directory containing interfaces for elements that will be captured
+		for a single triggered sample set in the buffer.
+
+What:		/sys/.../device[n]/buffer/scan_elements/[m]_accel_x0_en
+KernelVersion:	2.6.37
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Scan element control for triggered data capture. m implies the
+		ordering within the buffer. Next the type is specified with
+		modifier and channel number as per the sysfs single channel
+		access above.
+
+What:		/sys/.../device[n]/buffer/scan_elements/accel[_x0]_precision
+KernelVersion:	2.6.37
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Scan element precision within the buffer. Note that the
+		data alignment must restrictions must be read from within
+		buffer to work out full data alignment for data read
+		via buffer_access chrdev. _x0 dropped if shared across all
+		acceleration channels.
+
+What:		/sys/.../device[n]/buffer/scan_elements/accel[_x0]_shift
+KernelVersion:	2.6.37
+Contact:	linux-iio@vger.kernel.org
+Description:
+		A bit shift (to right) that must be applied prior to
+		extracting the bits specified by accel[_x0]_precision.
+

drivers/staging/iio/Documentation/userspace.txt

@@ -7,17 +7,14 @@ Typical sysfs entries (pruned for clarity)
 /sys/class/iio
   device0 - iio_dev related elements
     name - driver specific identifier (here lis3l02dq)
-    accel_x - polled (or from ring) raw readout of acceleration
+    accel_x_raw - polled (or from ring) raw readout of acceleration
-    accel_x_gain - hardware gain (calibration)
+    accel_x_offset - offset to be applied to the raw reading
-    accel_x_offset - hardware offset (calibration)
+    accel_x_scale - scale to be applied to the raw reading and offset
-    available_sampling_frequency
+    accel_x_calibbias - hardware offset (calibration)
+    accel_x_calibscale - hardware gain (calibration)
 
-    available_sampling_frequency - what options are there
+    sampling_frequency_available - what options are there
     sampling_frequency - control of internal sampling frequency
-    scan_elements - controls which channels will be stored in the ring buffer
-      scan_en_accel_x
-      scan_en_accel_y
-      scan_en_timestamp
     device - link to underlying hardware device
     uevent - udev related element
 
@@ -30,23 +27,28 @@ Typical sysfs entries (pruned for clarity)
       dev - major:minor for the chrdev (note major allocation dynamic)
     trigger - consumer attachement
       current_trigger - name based association with a trigger
-    ring_buffer0 - ring buffer interface
+    device0:buffer0 - ring buffer interface
-      bps - byptes per sample (read only), dependant on scan element selection
+      bytes_per_datum - byptes per complete datum (read only),
+                        dependant on scan element selection
       length - (rw) specificy length fo software ring buffer (typically ro in hw case)
-      ring_enable - turn the ring on. If its the first to be enabled attached to this
+      enable - turn the ring on. If its the first to be enabled attached to this
-                    trigger will also enable the trigger.
+               trigger will also enable the trigger.
-      ring_access0
+      device0:buffer0:access0
         dev - major:minor for ring buffer access chrdev
-      ring_event_line0
+      device0:buffer0:event0
         dev - major:minor for ring buffer event chrdev
+      scan_elements - controls which channels will be stored in the ring buffer
+        accel_x_en
+        accel_y_en
+        timestamp_en
 
   trigger0 - data ready trigger elements
     name - unqiue name of trigger
 
 Udev will create the following entries under /dev by default:
 
-ring_access0 - ring access chrdev
+device0:buffer0:access0 - ring access chrdev
-ring_event0 - ring event chrdev
+device0:buffer0:event0 - ring event chrdev
 event_line0 - general event chrdev.
 
 For the example code we assume the following rules have been used to ensure