linux-kernel - Re: [PATCH 03/10] spi: Add flag for no TX after a RX in the same Chip Select

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Message-ID: <20210908123734.GF4112@sirena.org.uk>
Date:   Wed, 8 Sep 2021 13:37:34 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Lucas Tanure <tanureal@...nsource.cirrus.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Sanjay R Mehta <sanju.mehta@....com>,
        Nehal Bakulchandra Shah <Nehal-Bakulchandra.shah@....com>,
        linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
        patches@...nsource.cirrus.com
Subject: Re: [PATCH 03/10] spi: Add flag for no TX after a RX in the same
 Chip Select

On Wed, Sep 08, 2021 at 12:34:44PM +0100, Lucas Tanure wrote:
> Some controllers can't write to the bus after a read without
> releasing the chip select, so add flag and a check in spi core

Nothing you've added ever reads this flag and I'm not sure what anything
would be able to constructively do with it so why add the flag?  I don't
understand what the use case is.

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