linux-kernel - Re: [PATCH 3/3] doc: iio: pressure: ms5611: added max SPI frequency setting to the example

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Message-ID: <CACbQKWeRVXw_78-OoZFHCNX+tgRx_OfCaK7OaYBBwzjMAxcYng@mail.gmail.com>
Date:   Thu, 20 Oct 2022 07:31:28 +0200
From:   Mitja Špes <mitja@...av.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     linux-iio@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Tomasz Duszynski <tduszyns@...il.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] doc: iio: pressure: ms5611: added max SPI frequency
 setting to the example

On Wed, Oct 19, 2022 at 3:23 PM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Wed, Oct 19, 2022 at 3:55 PM Mitja Spes <mitja@...av.com> wrote:
> >
> > Added max SPI frequency setting to the example. It is now honored by the
> > driver.
>
> Is it possible to add a constraint here? So the schema validator will
> issue the warning / error if the speed is too high.

The constraint is already there:
https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/iio/pressure/meas%2Cms5611.yaml
```
spi-max-frequency:
    maximum: 20000000
```

But in any case the patch 2/3 limits the max frequency.

Kind regards,
Mitja Spes