linux-kernel - Re: [PATCH v4 1/3] iio: Add modifier for white light

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Message-ID: <alpine.DEB.2.21.1808022117460.25216@vps.pmeerw.net>
Date:   Thu, 2 Aug 2018 21:30:12 +0200 (CEST)
From:   Peter Meerwald-Stadler <pmeerw@...erw.net>
To:     Parthiban Nallathambi <pn@...x.de>
cc:     jic23@...nel.org, knaack.h@....de, lars@...afoo.de,
        robh+dt@...nel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, matthias.bgg@...il.com, wd@...x.de,
        sbabic@...x.de, hs@...x.de
Subject: Re: [PATCH v4 1/3] iio: Add modifier for white light

Hello,

it is not clear to me why 'white' is needed; 
isn't that the default, i.e. unfiltered light?

thanks, regards, p.

> Signed-off-by: Parthiban Nallathambi <pn@...x.de>
> ---
>  Documentation/ABI/testing/sysfs-bus-iio | 7 +++++++
>  drivers/iio/industrialio-core.c         | 1 +
>  include/uapi/linux/iio/types.h          | 1 +
>  tools/iio/iio_event_monitor.c           | 2 ++
>  4 files changed, 11 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
> index 731146c3b138..43e481aed5b2 100644
> --- a/Documentation/ABI/testing/sysfs-bus-iio
> +++ b/Documentation/ABI/testing/sysfs-bus-iio
> @@ -1312,6 +1312,13 @@ Description:
>  		standardised CIE Erythemal Action Spectrum. UV index values range
>  		from 0 (low) to >=11 (extreme).
>  
> +What:		/sys/.../iio:deviceX/in_intensityY_white_raw
> +KernelVersion:	4.18
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		Modifier white indicates that measurements contain white LED
> +		component.
> +
>  What:		/sys/.../iio:deviceX/in_intensity_red_integration_time
>  What:		/sys/.../iio:deviceX/in_intensity_green_integration_time
>  What:		/sys/.../iio:deviceX/in_intensity_blue_integration_time
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index 19bdf3d2962a..cb939b9fad16 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -108,6 +108,7 @@ static const char * const iio_modifier_names[] = {
>  	[IIO_MOD_LIGHT_GREEN] = "green",
>  	[IIO_MOD_LIGHT_BLUE] = "blue",
>  	[IIO_MOD_LIGHT_UV] = "uv",
> +	[IIO_MOD_LIGHT_WHITE] = "white",
>  	[IIO_MOD_QUATERNION] = "quaternion",
>  	[IIO_MOD_TEMP_AMBIENT] = "ambient",
>  	[IIO_MOD_TEMP_OBJECT] = "object",
> diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
> index 4213cdf88e3c..de87a6c7e6de 100644
> --- a/include/uapi/linux/iio/types.h
> +++ b/include/uapi/linux/iio/types.h
> @@ -84,6 +84,7 @@ enum iio_modifier {
>  	IIO_MOD_CO2,
>  	IIO_MOD_VOC,
>  	IIO_MOD_LIGHT_UV,
> +	IIO_MOD_LIGHT_WHITE,
>  };
>  
>  enum iio_event_type {
> diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
> index b61245e1181d..a2f9c62a79dd 100644
> --- a/tools/iio/iio_event_monitor.c
> +++ b/tools/iio/iio_event_monitor.c
> @@ -96,6 +96,7 @@ static const char * const iio_modifier_names[] = {
>  	[IIO_MOD_LIGHT_GREEN] = "green",
>  	[IIO_MOD_LIGHT_BLUE] = "blue",
>  	[IIO_MOD_LIGHT_UV] = "uv",
> +	[IIO_MOD_LIGHT_WHITE] = "white",
>  	[IIO_MOD_QUATERNION] = "quaternion",
>  	[IIO_MOD_TEMP_AMBIENT] = "ambient",
>  	[IIO_MOD_TEMP_OBJECT] = "object",
> @@ -178,6 +179,7 @@ static bool event_is_known(struct iio_event_data *event)
>  	case IIO_MOD_LIGHT_GREEN:
>  	case IIO_MOD_LIGHT_BLUE:
>  	case IIO_MOD_LIGHT_UV:
> +	case IIO_MOD_LIGHT_WHITE:
>  	case IIO_MOD_QUATERNION:
>  	case IIO_MOD_TEMP_AMBIENT:
>  	case IIO_MOD_TEMP_OBJECT:
> 

-- 

Peter Meerwald-Stadler
Mobile: +43 664 24 44 418