linux-kernel - Re: [PATCH v4 6/8] dt-bindings: iio: adc: max1027: Mark interrupts as optional

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Date:   Sat, 12 Oct 2019 12:31:55 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        <devicetree@...r.kernel.org>, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v4 6/8] dt-bindings: iio: adc: max1027: Mark interrupts
 as optional

On Fri, 11 Oct 2019 16:43:45 +0200
Miquel Raynal <miquel.raynal@...tlin.com> wrote:

> The chips have a 'start conversion' and a 'end of conversion' pair of
> pins. They can be used but this is absolutely not mandatory as regular
> polling is supported by the chip depending on its internal clocking
> setup.
> 
> There is no physical reason to force the use of interrupts so turn
> them optional.
> 
> Also, once the interrupt turned optional, these devices fit perfectly
> the "trivial devices" described in the generic (yaml) bindings file, so
> instead of converting this text file to json schema, we can just add
> the relevant compatibles in:
> Documentation/devicetree/bindings/trivial-devices.yaml.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
I guess this keeps things consistent event if we are about to delete it ;)

Applied.

> ---
>  Documentation/devicetree/bindings/iio/adc/max1027-adc.txt | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/max1027-adc.txt b/Documentation/devicetree/bindings/iio/adc/max1027-adc.txt
> index e680c61dfb84..7b23d68f655c 100644
> --- a/Documentation/devicetree/bindings/iio/adc/max1027-adc.txt
> +++ b/Documentation/devicetree/bindings/iio/adc/max1027-adc.txt
> @@ -3,6 +3,8 @@
>  Required properties:
>    - compatible: Should be "maxim,max1027" or "maxim,max1029" or "maxim,max1031"
>    - reg: SPI chip select number for the device
> +
> +Optional properties:
>    - interrupts: IRQ line for the ADC
>    see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
>