linux-kernel - Re: [PATCH 1/2] dt-bindings: iio: proximity: Add bindings for Murata IRS-D200

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Message-ID: <pndwmzz1yqu.fsf@axis.com>
Date:   Mon, 19 Jun 2023 12:41:06 +0200
From:   Waqar Hameed <waqar.hameed@...s.com>
To:     Jonathan Cameron <jic23@...nel.org>
CC:     <devicetree@...r.kernel.org>, Conor Dooley <conor+dt@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>, <kernel@...s.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        <kernel@...ts.axis.com>
Subject: Re: [PATCH 1/2] dt-bindings: iio: proximity: Add bindings for
 Murata IRS-D200

On Sat, Jun 17, 2023 at 13:55 +0100 Jonathan Cameron <jic23@...nel.org> wrote:

> On Fri, 16 Jun 2023 17:10:42 +0200
> Waqar Hameed <waqar.hameed@...s.com> wrote:
>
>> Murata IRS-D200 is a PIR sensor for human detection. It uses the I2C bus
>> for communication with interrupt support. Add devicetree bindings
>> requiring the compatible string, I2C slave address (reg) and interrupts.
>> 
>> Signed-off-by: Waqar Hameed <waqar.hameed@...s.com>
>
> This device will have some power supplies, so I'd expect those to be both
> listed and marked as required (maybe some are optional?)

Right, will add that here (and call `devm_regulator_get_enable()` in
driver's probe).

[...]

>> +required:
>> +  - compatible
>> +  - reg
>> +  - interrupts
>
> If it is possible to remove interrupts from requires  - and hence have
> at least a partly functional driver doing basic reading of the sensor
> then that is usually a good idea.   Far too many board designers seem
> to decide that they don't need to wire up interrupt lines.
>
> If it's really hard then don't worry too much.

I see. It would be possible, but would also require some work. Let's
leave it for now then?