linux-kernel - Re: [PATCH 4/7] dt-bindings: fsi: fsi2spi: Document new restricted property

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Message-ID: <20200821120336.GE4870@sirena.org.uk>
Date:   Fri, 21 Aug 2020 13:03:36 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Eddie James <eajames@...ux.ibm.com>
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, joel@....id.au,
        bradleyb@...ziesquirrel.com, robh+dt@...nel.org, arnd@...db.de
Subject: Re: [PATCH 4/7] dt-bindings: fsi: fsi2spi: Document new restricted
 property

On Thu, Aug 20, 2020 at 04:07:41PM -0500, Eddie James wrote:
> On 8/20/20 12:14 PM, Mark Brown wrote:
> > On Thu, Aug 20, 2020 at 12:02:25PM -0500, Eddie James wrote:

> > > Add documentation for the "fsi2spi,restricted" property which indicates
> > > a controller shouldn't sequence loops and therefore has a smaller
> > > transfer size.

> > In what situation might someone set this?  It sounds like a
> > configuration option rather than a description of the hardware.

> It is a description of the configuration of the hardware. For controllers
> that are configured to be restricted for security purposes, this property
> will be set.

The documentation needs to be a *lot* clearer - users need to be able to
relate this to whatever system configuration this corresponds to.  Right
now it says that the controller shouldn't sequence loops but there's no
indication of why this might be.

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