linux-kernel - Re: [PATCH V1] IIO channel type and modifiers for CCT and RGBC data

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Message-ID: <4FB39DBF.3010307@kernel.org>
Date:	Wed, 16 May 2012 13:29:51 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Jon Brenner <jbrenner@...sinc.com>
CC:	Jonathan Cameron <jic23@....ac.uk>,
	linux-iio <linux-iio@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V1] IIO channel type and modifiers for CCT and RGBC data

On 5/15/2012 9:58 PM, Jon Brenner wrote:
> Add iio channel type and modifiers for Correlated Color Temperature (CCT)
> and RGBC (red/green/blue/clear) data.
> Add CCT and RGBC descriptions in documentation.
>
Core changes are fine. Few trivial bits in the docs.
> Signed-off-by: Jon Brenner<jbrenner@...sinc.com>
> ---
>   drivers/iio/industrialio-core.c                    |    5 ++
>   .../staging/iio/Documentation/sysfs-bus-iio-light  |   50 ++++++++++++++++++++
>   include/linux/iio/types.h                          |    5 ++
>   3 files changed, 60 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index 1ddd886..34d8cc9 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -64,6 +64,7 @@ static const char * const iio_chan_type_name_spec[] = {
>   	[IIO_TIMESTAMP] = "timestamp",
>   	[IIO_CAPACITANCE] = "capacitance",
>   	[IIO_ALTVOLTAGE] = "altvoltage",
> +	[IIO_CCT] = "cct",
>   };
>
>   static const char * const iio_modifier_names[] = {
> @@ -72,6 +73,10 @@ static const char * const iio_modifier_names[] = {
>   	[IIO_MOD_Z] = "z",
>   	[IIO_MOD_LIGHT_BOTH] = "both",
>   	[IIO_MOD_LIGHT_IR] = "ir",
> +	[IIO_MOD_LIGHT_CLEAR] = "clear",
> +	[IIO_MOD_LIGHT_RED] = "red",
> +	[IIO_MOD_LIGHT_GREEN] = "green",
> +	[IIO_MOD_LIGHT_BLUE] = "blue",
>   };
>
>   /* relies on pairs of these shared then separate */
> diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
> index 715c74d..f9a4145 100644
> --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light
> +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
> @@ -34,6 +34,15 @@ Description:
>   		it comes back in SI units, it should also include _input else it
>   		should include _raw to signify it is not in SI units.
>
> +What:		/sys/bus/iio/devices/device[n]/in_cct0[_input|_raw]
> +KernelVersion:	3.4.0
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		This should return the correlated color temperature from the
> +		light sensor. If it comes back in SI units, it should also
> +		include _input else it should include _raw to signify it is not
> +		in SI units.
> +
>   What:		/sys/.../device[n]/proximity_on_chip_ambient_infrared_supression
>   KernelVersion:	2.6.37
>   Contact:	linux-iio@...r.kernel.org
> @@ -82,3 +91,44 @@ Contact:	linux-iio@...r.kernel.org
>   Description:
>   		This property gets/sets the table of coefficients
>   		used in calculating illuminance in lux.
> +
> +What:		/sys/bus/iio/devices/device[n]/in_intensity_clear[_input|_raw]
> +KernelVersion:	3.4.0
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		This property is supported by sensors that have a RGBC
> +		sensing mode. This value should be the output from a reading
> +		and if expressed in SI units, should include _input. If this
> +		value is not in SI units (e.g. irradiance, uW/mm), then it should
> +		include _raw.
It's not an example so loose the e.g. (it's the only choice). Also units 
should be W/m^2. We let in a few micro units before because they match 
with hwmon, but lets just put this in the correct units from the start...

Almost certainly makes sense to have one help entry for the next three.
Just igve it multiple What: lines
> +
> +What:		/sys/bus/iio/devices/device[n]/in_intensity_red[_input|_raw]
> +KernelVersion:	3.4.0
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		This property is supported by sensors that have a RGBC
> +		sensing mode. This value should be the output from a reading
> +		and if expressed in SI units, should include _input. If this
> +		value is not in SI units (e.g. irradiance, uW/mm), then it should
> +		include _raw.
> +
> +What:		/sys/bus/iio/devices/device[n]/in_intensity_green[_input|_raw]
> +KernelVersion:	3.4.0
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		This property is supported by sensors that have a RGBC
> +		sensing mode. This value should be the output from a reading
> +		and if expressed in SI units, should include _input. If this
> +		value is not in SI units (e.g. irradiance, uW/mm), then it should
> +		include _raw.
> +
> +What:		/sys/bus/iio/devices/device[n]/in_intensity_blue[_input|_raw]
> +KernelVersion:	3.4.0
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		This property is supported by sensors that have a RGBC
> +		sensing mode. This value should be the output from a reading
> +		and if expressed in SI units, should include _input. If this
> +		value is not in SI units (e.g. irradiance, uW/mm), then it should
> +		include _raw.
> +
> diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
> index 1b073b1..a7de5d9 100644
> --- a/include/linux/iio/types.h
> +++ b/include/linux/iio/types.h
> @@ -28,6 +28,7 @@ enum iio_chan_type {
>   	IIO_TIMESTAMP,
>   	IIO_CAPACITANCE,
>   	IIO_ALTVOLTAGE,
> +	IIO_CCT,
>   };
>
>   enum iio_modifier {
> @@ -45,6 +46,10 @@ enum iio_modifier {
>   	IIO_MOD_X_OR_Y_OR_Z,
>   	IIO_MOD_LIGHT_BOTH,
>   	IIO_MOD_LIGHT_IR,
> +	IIO_MOD_LIGHT_CLEAR,
> +	IIO_MOD_LIGHT_RED,
> +	IIO_MOD_LIGHT_GREEN,
> +	IIO_MOD_LIGHT_BLUE,
>   };
>
>   #define IIO_VAL_INT 1
> --
> 1.7.4.1
>
> --
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