linux-kernel - Re: [PATCH v2 01/11] dt-bindings: spi: allow expressing DTR capability

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Message-ID: <20200227162842.GE4062@sirena.org.uk>
Date:   Thu, 27 Feb 2020 16:28:42 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Boris Brezillon <boris.brezillon@...labora.com>
Cc:     Pratyush Yadav <p.yadav@...com>,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, Sekhar Nori <nsekhar@...com>,
        linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-mtd@...ts.infradead.org
Subject: Re: [PATCH v2 01/11] dt-bindings: spi: allow expressing DTR
 capability

On Thu, Feb 27, 2020 at 05:11:47PM +0100, Boris Brezillon wrote:
> Pratyush Yadav <p.yadav@...com> wrote:

> > Allow spi devices to express DTR receive and transmit capabilities via
> > the properties "spi-rx-dtr" and "spi-tx-dtr".

> Is the RX/TX granularity really useful?

It's what we do for other properties, and if this is anything like the
other things adding extra wiring you can't assume that the ability to
use the feature for TX implies RX.

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