linux-kernel - Re: [PATCH v3 03/10] dt-bindings: iio: adc: ad7606: Add iio backend bindings

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Message-ID: <20241005185023.GA521649-robh@kernel.org>
Date: Sat, 5 Oct 2024 13:50:23 -0500
From: Rob Herring <robh@...nel.org>
To: Guillaume Stols <gstols@...libre.com>
Cc: Uwe Kleine-König <ukleinek@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Michael Hennerich <Michael.Hennerich@...log.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Jonathan Corbet <corbet@....net>, linux-pwm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
	linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, aardelean@...libre.com,
	dlechner@...libre.com,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v3 03/10] dt-bindings: iio: adc: ad7606: Add iio backend
 bindings

On Fri, Oct 04, 2024 at 09:48:37PM +0000, Guillaume Stols wrote:
> Add the required properties for iio-backend support, as well as an
> example and the conditions to mutually exclude interruption and
> conversion trigger with iio-backend.
> The iio-backend's function is to controls the communication, and thus the
> interruption pin won't be available anymore.
> As a consequence, the conversion pin must be controlled externally since
> we will miss information about when every single conversion cycle (i.e
> conversion + data transfer) ends, hence a PWM is introduced to trigger
> the conversions.
> 
> Signed-off-by: Guillaume Stols <gstols@...libre.com>
> ---
>  .../devicetree/bindings/iio/adc/adi,ad7606.yaml    | 64 +++++++++++++++++++++-
>  1 file changed, 62 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
> index 47081c79a1cf..a389cfda824d 100644
> --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
> @@ -129,6 +129,29 @@ properties:
>        assumed that the pins are hardwired to VDD.
>      type: boolean
>  
> +  pwms:
> +    description:
> +      In case the conversion is triggered by a PWM instead of a GPIO plugged to
> +      the CONVST pin, the PWM must be referenced.
> +      The first is the PWM connected to CONVST or CONVST1 for the chips with 2

s/2/2nd/

Otherwise,

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>