Re: [PATCH 5/8] iio: Add channel for chromaticity

[Jonathan Cameron <jic23@kernel.org>]

On Fri, 15 Sep 2023 10:47:00 +0530
Basavaraj Natikar <Basavaraj.Natikar@amd.com> wrote:

> In most cases, ambient color sensors also support the x and y light
> colors, which represent the coordinates on the CIE 1931 chromaticity
> diagram. Thus, add channel for chromaticity.

Adding a channel type.

Otherwise looks reasonable to me.

> 
> Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
> ---
>  Documentation/ABI/testing/sysfs-bus-iio | 8 ++++++++
>  drivers/iio/industrialio-core.c         | 1 +
>  include/uapi/linux/iio/types.h          | 1 +
>  tools/iio/iio_event_monitor.c           | 2 ++
>  4 files changed, 12 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
> index a2854dc9a839..6a810771f5e4 100644
> --- a/Documentation/ABI/testing/sysfs-bus-iio
> +++ b/Documentation/ABI/testing/sysfs-bus-iio
> @@ -2179,3 +2179,11 @@ Contact:	linux-iio@vger.kernel.org
>  Description:
>  		Number of conditions that must occur, during a running
>  		period, before an event is generated.
> +
> +What:		/sys/bus/iio/devices/iio:deviceX/in_chromaticity_x_raw
> +What:		/sys/bus/iio/devices/iio:deviceX/in_chromaticity_y_raw
> +KernelVersion:	6.6
> +Contact:	linux-iio@vger.kernel.org
> +Description:
> +		The x and y light color coordinate on the CIE 1931 chromaticity
> +		diagram.
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index d752e9c0499b..c1df66cdfdf6 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -90,6 +90,7 @@ static const char * const iio_chan_type_name_spec[] = {
>  	[IIO_POSITIONRELATIVE]  = "positionrelative",
>  	[IIO_PHASE] = "phase",
>  	[IIO_MASSCONCENTRATION] = "massconcentration",
> +	[IIO_CHROMATICITY] = "chromaticity",
>  };
>  
>  static const char * const iio_modifier_names[] = {
> diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
> index c79f2f046a0b..8952d48cfc64 100644
> --- a/include/uapi/linux/iio/types.h
> +++ b/include/uapi/linux/iio/types.h
> @@ -47,6 +47,7 @@ enum iio_chan_type {
>  	IIO_POSITIONRELATIVE,
>  	IIO_PHASE,
>  	IIO_MASSCONCENTRATION,
> +	IIO_CHROMATICITY,
>  };
>  
>  enum iio_modifier {
> diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
> index 0a5c2bb60030..115ba1fbf3ac 100644
> --- a/tools/iio/iio_event_monitor.c
> +++ b/tools/iio/iio_event_monitor.c
> @@ -59,6 +59,7 @@ static const char * const iio_chan_type_name_spec[] = {
>  	[IIO_POSITIONRELATIVE] = "positionrelative",
>  	[IIO_PHASE] = "phase",
>  	[IIO_MASSCONCENTRATION] = "massconcentration",
> +	[IIO_CHROMATICITY] = "chromaticity",
>  };
>  
>  static const char * const iio_ev_type_text[] = {
> @@ -173,6 +174,7 @@ static bool event_is_known(struct iio_event_data *event)
>  	case IIO_POSITIONRELATIVE:
>  	case IIO_PHASE:
>  	case IIO_MASSCONCENTRATION:
> +	case IIO_CHROMATICITY:
>  		break;
>  	default:
>  		return false;