linux-kernel - Re: [PATCH 1/3] IIO: Direct digital synthesis abi documentation

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Date:	Tue, 14 Dec 2010 15:09:00 +0000
From:	Jonathan Cameron <jic23@....ac.uk>
To:	michael.hennerich@...log.com
CC:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	drivers@...log.com, device-drivers-devel@...ckfin.uclinux.org
Subject: Re: [PATCH 1/3] IIO: Direct digital synthesis abi documentation

On 12/14/10 14:54, michael.hennerich@...log.com wrote:
> From: Michael Hennerich <michael.hennerich@...log.com>
> 
> 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
> 
> Changes since v2:
> IIO: sysfs-bus-iio-dds: Apply more list review feedback
> 
> 	Fix mixture of X and [n] notation for indices.
> 	Fix some wording in the descriptions.

Looks good. 
> Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
Acked-by: Jonathan Cameron <jic23@....ac.uk>
> ---
>  .../staging/iio/Documentation/sysfs-bus-iio-dds    |   93 ++++++++++++++++++++
>  1 files changed, 93 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..ffdd547
> --- /dev/null
> +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-dds
> @@ -0,0 +1,93 @@
> +
> +What:		/sys/bus/iio/devices/.../ddsX_freqY
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		Stores frequency into tuning word Y.
> +		There will 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/.../ddsX_freqY_scale
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +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/.../ddsX_freqsymbol
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +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_enable file.
> +
> +What:		/sys/bus/iio/devices/.../ddsX_phaseY
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		Stores phase into Y.
> +		There will 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/.../ddsX_phaseY_scale
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +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/.../ddsX_phasesymbol
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +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/.../ddsX_pincontrol_en
> +What:		/sys/bus/iio/devices/.../ddsX_pincontrol_freq_en
> +What:		/sys/bus/iio/devices/.../ddsX_pincontrol_phase_en
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +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/.../ddsX_out_enable
> +What:		/sys/bus/iio/devices/.../ddsX_outY_enable
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		ddsX_outY_enable controls signal generation on output Y of
> +		channel X. Y may be suppressed if all channels are
> +		controlled together.
> +
> +What:		/sys/bus/iio/devices/.../ddsX_outY_wavetype
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +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/.../ddsX_outY_wavetype_available
> +KernelVersion:	2.6.37
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		Lists all available output waveform options.
> --
> 1.6.0.2
> 
> 

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