diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/iio/Documentation/ring.txt | 6 | ||||
| -rw-r--r-- | drivers/staging/iio/Documentation/sysfs-class-iio | 72 | ||||
| -rw-r--r-- | drivers/staging/iio/Documentation/userspace.txt | 36 |
3 files changed, 57 insertions, 57 deletions
diff --git a/drivers/staging/iio/Documentation/ring.txt b/drivers/staging/iio/Documentation/ring.txt index d2ca6834c169..3696c364e644 100644 --- a/drivers/staging/iio/Documentation/ring.txt +++ b/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/set the number of bytes for a given reading (single element, not sample set) - The value of bps (bytes per set) is created from a combination of this and the - enabled scan elements. +get_bytes_per_datum, set_bytes_per_datum + Get/set the number of bytes for a complete scan. (All samples + timestamp) get_length / set_length Get/set the number of sample sets that may be held by the buffer. diff --git a/drivers/staging/iio/Documentation/sysfs-class-iio b/drivers/staging/iio/Documentation/sysfs-class-iio index 714b4c57c82a..c13702037b08 100644 --- a/drivers/staging/iio/Documentation/sysfs-class-iio +++ b/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 -KernelVersion: 2.6.35 +What: /sys/.../device[n]:buffer/bytes_per_datum +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. + diff --git a/drivers/staging/iio/Documentation/userspace.txt b/drivers/staging/iio/Documentation/userspace.txt index 4838818f65ef..8bba2fa3ba07 100644 --- a/drivers/staging/iio/Documentation/userspace.txt +++ b/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_gain - hardware gain (calibration) - accel_x_offset - hardware offset (calibration) - available_sampling_frequency + accel_x_raw - polled (or from ring) raw readout of acceleration + accel_x_offset - offset to be applied to the raw reading + accel_x_scale - scale to be applied to the raw reading and offset + 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 - bps - byptes per sample (read only), dependant on scan element selection + device0:buffer0 - ring buffer interface + 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 - trigger will also enable the trigger. - ring_access0 + enable - turn the ring on. If its the first to be enabled attached to this + trigger will also enable the trigger. + 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 -ring_event0 - ring event chrdev +device0:buffer0:access0 - ring access 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 |