linux-kernel - Re: [PATCH v2] spi: omap2-mcspi: Add support for GPIO chipselects

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Date:	Tue, 28 Apr 2015 07:32:21 +0200
From:	Martin Sperl <martin@...rl.org>
To:	Michael Welling <mwelling@...e.org>
Cc:	Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] spi: omap2-mcspi: Add support for GPIO chipselects


> On 28.04.2015, at 03:21, Michael Welling <mwelling@...e.org> wrote:
> If I were to attempt to convert the driver to use the core chipselect support,
> how would I go about doing it?
> 
> Is there another driver that I can use for reference?
You may look into this patch: e34ff011c70e5f4ef219141711142d5111ae6ebb
for the spi-bcm2835 driver, which did the conversion to the new transfer_one
interface (and framework based GPIO chipselects).

For most parts all you have to do is take the contents of the loop over all the
spi_transfers inside your master->transfer_one_message method and create a new
method with it and assign it to master->transfer_one.

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