linux-kernel - Re: [PATCH v2 3/3] dt-bindings: adis16460: Add 'spi-cs-inactive-delay-ns' property

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Date:   Mon, 23 Oct 2023 17:06:54 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Nuno Sá <noname.nuno@...il.com>
Cc:     Ramona Gradinariu <ramona.gradinariu@...log.com>, jic23@...nel.org,
        nuno.sa@...log.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 3/3] dt-bindings: adis16460: Add
 'spi-cs-inactive-delay-ns' property

On Mon, Oct 23, 2023 at 04:27:48PM +0200, Nuno Sá wrote:
> On Mon, 2023-10-23 at 17:05 +0300, Ramona Gradinariu wrote:
> > The adis16460 device requires a stall time between SPI
> > transactions (during which the chip select is inactive),
> > with a minimum value equal to 16 microseconds.
> > This commit adds 'spi-cs-inactive-delay-ns' property, which should
> > indicate the stall time between consecutive SPI transactions.
> > 
> > Signed-off-by: Ramona Gradinariu <ramona.gradinariu@...log.com>
> > ---
> > changes in v2:
> >  - added default value
> >  - updated description
> >  - updated commit message
> >  .../devicetree/bindings/iio/imu/adi,adis16460.yaml          | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml
> > b/Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml
> > index 4e43c80e5119..f10469b86ee0 100644
> > --- a/Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml
> > +++ b/Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml
> > @@ -25,6 +25,12 @@ properties:
> > 
> >    spi-cpol: true
> > 
> > +  spi-cs-inactive-delay-ns:
> > +    minimum: 16000
> > +    default: 16000
> > +    description:
> > +      Indicates the stall time between consecutive SPI transactions.
> > +
> 
> You should drop the description... 
> 
> Also, give more time before posting a v2 so others get a chance to review your
> patches. It's also better for you since you can gather more change requests.

Further, I don't see an answer to Krzysztof's question of why the stall
time would not just be set to 16,000 ns in the driver, based on the
compatible.

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