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Message-ID: <CABqG17hzZf2mme0v7hALhpd6-N3ZHqxdH-AhFg5eF9sbLSC2gw@mail.gmail.com>
Date: Fri, 26 Jan 2024 21:55:20 +0530
From: Naresh Solanki <naresh.solanki@...ements.com>
To: Conor Dooley <conor@...nel.org>
Cc: Peter Rosin <peda@...ntia.se>, Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
mazziesaccount@...il.com, linux-iio@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: iio: afe: voltage-divider: Add io-channel-cells
Hi,
On Fri, 26 Jan 2024 at 21:47, Conor Dooley <conor@...nel.org> wrote:
>
> Hey,
>
> On Fri, Jan 26, 2024 at 05:25:08PM +0530, Naresh Solanki wrote:
> > Add #io-channel-cells expected by driver. i.e., below is the message
> > seen in kernel log:
> > OF: /iio-hwmon: could not get #io-channel-cells for /voltage_divider1
> >
>
> > TEST=Run below command & make sure there is no error:
> > make DT_CHECKER_FLAGS=-m dt_binding_check -j1
>
> This shouldn't be in the commit message.
ok Will remove.
>
> >
> > Signed-off-by: Naresh Solanki <naresh.solanki@...ements.com>
> > ---
> > Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml b/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml
> > index dddf97b50549..b4b5489ad98e 100644
> > --- a/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml
> > +++ b/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml
> > @@ -39,6 +39,9 @@ properties:
> > description: |
> > Channel node of a voltage io-channel.
> >
> > + '#io-channel-cells':
> > + const: 1
>
> The example in this binding looks like the voltage-divider is intended
> to be an "IIO consumer" but "#io-channels-cells" is an "IIO provider"
> property.
>
> Are you sure this is correct?
I'm not aware that #io-channels-cells is only for IIO provider.
But I do get some kernel message as mention in commit messages
if this is specified in DT.
Regards,
Naresh
>
> > +
> > output-ohms:
> > description:
> > Resistance Rout over which the output voltage is measured. See full-ohms.
> >
> > base-commit: ecb1b8288dc7ccbdcb3b9df005fa1c0e0c0388a7
> > --
> > 2.42.0
> >
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