linux-kernel - Re: [PATCH v5 10/10] Documetation: ABI: add sinc1 and sinc5+pf1 filter

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Message-ID: <5f373faf-2ca4-405d-8709-2ec91a05f86d@baylibre.com>
Date: Mon, 12 May 2025 09:15:25 -0500
From: David Lechner <dlechner@...libre.com>
To: Antoniu Miclaus <antoniu.miclaus@...log.com>, jic23@...nel.org,
 robh@...nel.org, conor+dt@...nel.org, linux-iio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 10/10] Documetation: ABI: add sinc1 and sinc5+pf1
 filter

On 5/9/25 5:50 AM, Antoniu Miclaus wrote:
> Add sinc1 and sinc5+pf1 filter types used for ad4080 device.
> 
> Add these two options into the filter_type available attribute.
> 
> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
> ---
>  Documentation/ABI/testing/sysfs-bus-iio | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
> index b8838cb92d38..2dfb74b5a990 100644
> --- a/Documentation/ABI/testing/sysfs-bus-iio
> +++ b/Documentation/ABI/testing/sysfs-bus-iio
> @@ -2275,6 +2275,8 @@ Description:
>  		Reading returns a list with the possible filter modes. Options
>  		for the attribute:
>  

Should also add:

		* "none" - Filter is disabled/bypassed.

> +		* "sinc1" - The digital sinc1 filter. Fast 1st
> +		  conversion time. Poor noise performance.
>  		* "sinc3" - The digital sinc3 filter. Moderate 1st
>  		  conversion time. Good noise performance.
>  		* "sinc4" - Sinc 4. Excellent noise performance. Long
> @@ -2290,6 +2292,7 @@ Description:
>  		* "sinc3+pf2" - Sinc3 + device specific Post Filter 2.
>  		* "sinc3+pf3" - Sinc3 + device specific Post Filter 3.
>  		* "sinc3+pf4" - Sinc3 + device specific Post Filter 4.
> +		* "sinc5+pf1" - Sinc5 + device specific Post Filter 1.
>  
>  What:		/sys/bus/iio/devices/iio:deviceX/filter_type
>  What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_filter_type