linux-kernel - Re: [PATCH] spi: dw: Enable Slave Select with GPIO Chip Select.

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Message-ID: <20161006093755.kv6tondkeauu5oz2@sirena.org.uk>
Date:   Thu, 6 Oct 2016 11:37:55 +0200
From:   Mark Brown <broonie@...nel.org>
To:     tthayer@...nsource.altera.com
Cc:     andriy.shevchenko@...ux.intel.com, jarkko.nikula@...ux.intel.com,
        jszhang@...vell.com, michael@...rt-africa.com, kernel@...idel.net,
        linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] spi: dw: Enable Slave Select with GPIO Chip Select.

On Wed, Oct 05, 2016 at 04:38:58PM -0500, tthayer@...nsource.altera.com wrote:

> This patch adds the Slave Select locally so that the transfer will
> start and complete. The GPIO CS is taken care of earlier in the SPI
> framework (spi_set_cs).

This seems like something that other devices might need - it's not the
first time I heard of a device with the data transfer start and chip
select being tied together.  Why not make this a generic feature that
the core implements and drivers can enable?

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