From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Hauke Mehrtens <hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org>
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
hauke.mehrtens-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
thomas.langer-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
daniel.schwierzeck-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
john-Pj+rj9U5foFAfugRpC6u6w@public.gmane.org,
nbd-Vt+b4OUoWG0@public.gmane.org
Subject: Re: [PATCH v3 1/2] spi: add transfer_status() callback
Date: Tue, 17 Jan 2017 19:18:02 +0000 [thread overview]
Message-ID: <20170117191802.cgbpnksly4vxamvu@sirena.org.uk> (raw)
In-Reply-To: <20170103172015.13052-2-hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org>
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On Tue, Jan 03, 2017 at 06:20:14PM +0100, Hauke Mehrtens wrote:
> This callback allows a driver to return the status of the SPI transfer
> which was asynchronously scheduled by transfer_one().
>
> Currently a call to spi_finalize_current_transfer() will mark the
> transfer as transferred successfully. To return an error it is only
> possible to not call spi_finalize_current_transfer() at all and let
> this time out and result in a timeout error. With this callback the
> driver gets asked about the status of the last transfer.
There's already an interface for that - set the status in the message
before notifying completion.
> In the Lantiq driver I want to use this to circumvent a strange
> hardware design in addition.
That's a separate thing...
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next prev parent reply other threads:[~2017-01-17 19:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-03 17:20 [PATCH v3 0/2] spi: lantiq-ssc: add support for Lantiq SSC SPI controller Hauke Mehrtens
[not found] ` <20170103172015.13052-1-hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org>
2017-01-03 17:20 ` [PATCH v3 1/2] spi: add transfer_status() callback Hauke Mehrtens
[not found] ` <20170103172015.13052-2-hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org>
2017-01-10 12:37 ` Mark Brown
2017-01-17 19:18 ` Mark Brown [this message]
2017-01-03 17:20 ` [PATCH v3 2/2] spi: lantiq-ssc: add support for Lantiq SSC SPI controller Hauke Mehrtens
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