From: Michael Hennerich <michael.hennerich@xxxxxxxxxx> Changes since RFC/v1: IIO: Apply list review feedback: Apply list review feedback: Restructure documentation according to list feedback. Rename attributes to fit IIO convention used in other drivers. Fix typos. Provide ddsX_out_enable as opposed to ddsX_out_disable Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> Reviewed-by: Jonathan Cameron <jic23@xxxxxxxxx> --- .../staging/iio/Documentation/sysfs-bus-iio-dds | 94 ++++++++++++++++++++ 1 files changed, 94 insertions(+), 0 deletions(-) create mode 100644 drivers/staging/iio/Documentation/sysfs-bus-iio-dds diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-dds b/drivers/staging/iio/Documentation/sysfs-bus-iio-dds new file mode 100644 index 0000000..6791174 --- /dev/null +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-dds @@ -0,0 +1,94 @@ + +What: /sys/bus/iio/devices/device[n]/ddsX_freqY +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Stores frequency into tuning word register Y. + There can be more than one ddsX_freqY file, which allows for + pin controlled FSK Frequency Shift Keying + (ddsX_pincontrol_freq_en is active) or the user can control + the desired active tuning word by writing Y to the + ddsX_freqsymbol file. + +What: /sys/bus/iio/devices/device[n]/ddsX_freqY_scale +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Scale to be applied to ddsX_freqY in order to obtain the + desired value in Hz. If shared across all frequency registers + Y is not present. It is also possible X is not present if + shared across all channels. + +What: /sys/bus/iio/devices/device[n]/ddsX_freqsymbol +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Specifies the active output frequency tuning word. The value + corresponds to the Y in ddsX_freqY. To exit this mode the user + can write ddsX_pincontrol_freq_en or ddsX_out_disable file. + +What: /sys/bus/iio/devices/device[n]/ddsX_phaseY +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Stores phase into phase register Y. + There can be more than one ddsX_phaseY file, which allows for + pin controlled PSK Phase Shift Keying + (ddsX_pincontrol_phase_en is active) or the user can + control the desired phase Y which is added to the phase + accumulator output by writing Y to the en_phase file. + +What: /sys/bus/iio/devices/device[n]/ddsX_phaseY_scale +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Scale to be applied to ddsX_phaseY in order to obtain the + desired value in rad. If shared across all phase registers + Y is not present. It is also possible X is not present if + shared across all channels. + +What: /sys/bus/iio/devices/device[n]/ddsX_phasesymbol +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Specifies the active phase Y which is added to the phase + accumulator output. The value corresponds to the Y in + ddsX_phaseY. To exit this mode the user can write + ddsX_pincontrol_phase_en or disable file. + +What: /sys/bus/iio/devices/device[n]/ddsX_pincontrol_en +What: /sys/bus/iio/devices/device[n]/ddsX_pincontrol_freq_en +What: /sys/bus/iio/devices/device[n]/ddsX_pincontrol_phase_en +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + ddsX_pincontrol_en: Both, the active frequency and phase is + controlled by the respective phase and frequency control inputs. + In case the device in question allows to independent controls, + then there are dedicated files (ddsX_pincontrol_freq_en, + ddsX_pincontrol_phase_en). + +What: /sys/bus/iio/devices/device[n]/ddsX_out_enable +What: /sys/bus/iio/devices/device[n]/ddsX_outY_enable +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + ddsX_out_enable: Enables signal generation on all outputs + of channel X. + ddsX_outY_enable: Enables signal generation on output Y, + of channel X. + +What: /sys/bus/iio/devices/device[n]/ddsX_outY_wavetype +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Specifies the output waveform. + (sine, triangle, ramp, square, ...) + For a list of available output waveform options read + available_output_modes. + +What: /sys/bus/iio/devices/device[n]/ddsX_outY_wavetype_available +KernelVersion: 2.6.37 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Lists all available output waveform options. -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html