From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Sourav Poddar <sourav.poddar-l0cyMroinI0@public.gmane.org>
Cc: computersforpeace-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
balbi-l0cyMroinI0@public.gmane.org,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
bcousson-rdvid1DuHRBWk0Htik3J/w@public.gmane.org
Subject: Re: [PATCH 12/17] spi/qspi: convert driver to enable/disable memory mapped.
Date: Thu, 28 Nov 2013 11:59:34 +0000 [thread overview]
Message-ID: <20131128115934.GE27568@sirena.org.uk> (raw)
In-Reply-To: <5297242B.3040807-l0cyMroinI0@public.gmane.org>
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On Thu, Nov 28, 2013 at 04:38:27PM +0530, Sourav Poddar wrote:
> On Thursday 28 November 2013 04:19 PM, Mark Brown wrote:
> >Removing the mapping isn't going to stop another context which has
> >obtained a handle on the map trying to look at the mapping.
> hmm..so the 'memcpy' part should be made atomic.(if possible?).
Or holding the memory region should prevent normal SPI use (so any users
ought to drop the memory region when they don't need it).
I'm still a bit surprised there's no DMA controllers for this...
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next prev parent reply other threads:[~2013-11-28 11:59 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-26 7:34 [PATCH 00/17] Add memory mapped support for ti qspi, m25p80 serial flash Sourav Poddar
[not found] ` <1385451313-1875-1-git-send-email-sourav.poddar-l0cyMroinI0@public.gmane.org>
2013-11-26 7:34 ` [PATCH 01/17] spi/spi.h: Add get_buf/put_buf support in spi master Sourav Poddar
[not found] ` <1385451313-1875-2-git-send-email-sourav.poddar-l0cyMroinI0@public.gmane.org>
2013-11-26 12:38 ` Mark Brown
2013-11-26 7:34 ` [PATCH 02/17] spi/spi.h: Add configure from slave support Sourav Poddar
[not found] ` <1385451313-1875-3-git-send-email-sourav.poddar-l0cyMroinI0@public.gmane.org>
2013-11-26 10:29 ` Mark Brown
[not found] ` <20131126102951.GX14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-26 11:21 ` Sourav Poddar
[not found] ` <52948451.3060706-l0cyMroinI0@public.gmane.org>
2013-11-26 12:21 ` Mark Brown
2013-11-28 4:47 ` Sourav Poddar
[not found] ` <5296CAEA.3030002-l0cyMroinI0@public.gmane.org>
2013-11-28 10:55 ` Mark Brown
2013-11-26 7:35 ` [PATCH 04/17] spi/qspi: parse control module register Sourav Poddar
2013-11-26 10:31 ` Mark Brown
[not found] ` <20131126103104.GZ14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-26 11:18 ` Sourav Poddar
[not found] ` <529483A2.3080000-l0cyMroinI0@public.gmane.org>
2013-11-26 12:25 ` Mark Brown
[not found] ` <20131126122512.GD14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-26 12:38 ` Sourav Poddar
2013-11-26 12:55 ` Mark Brown
2013-11-26 13:00 ` Sourav Poddar
2013-11-26 13:19 ` Mark Brown
[not found] ` <20131126131927.GN14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-26 13:20 ` Sourav Poddar
2013-11-26 7:35 ` [PATCH 05/17] spi/qspi: parse memory map register Sourav Poddar
2013-11-26 7:35 ` [PATCH 06/17] spi/qspi: Add support to switc to memory mapped operation Sourav Poddar
2013-11-26 12:57 ` Mark Brown
2013-11-28 4:39 ` Sourav Poddar
2013-11-26 7:35 ` [PATCH 08/17] spi/qspi: Add api for get_buf/put_buf Sourav Poddar
2013-11-26 7:35 ` [PATCH 09/17] spi/spi.h: Add "mem" variable in spi master Sourav Poddar
2013-11-26 13:01 ` Mark Brown
[not found] ` <20131126130119.GH14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-26 13:05 ` Sourav Poddar
[not found] ` <52949C9F.10008-l0cyMroinI0@public.gmane.org>
2013-11-26 13:20 ` Mark Brown
[not found] ` <20131126132051.GO14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-28 4:38 ` Sourav Poddar
2013-11-26 7:35 ` [PATCH 12/17] spi/qspi: convert driver to enable/disable memory mapped Sourav Poddar
2013-11-26 13:11 ` Mark Brown
2013-11-28 5:24 ` Sourav Poddar
2013-11-28 10:49 ` Mark Brown
[not found] ` <20131128104922.GK14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-28 11:08 ` Sourav Poddar
[not found] ` <5297242B.3040807-l0cyMroinI0@public.gmane.org>
2013-11-28 11:59 ` Mark Brown [this message]
2013-11-28 12:02 ` Sourav Poddar
2013-11-26 7:35 ` [PATCH 13/17] drivers: mtd: m25p80: Add api to configure master register Sourav Poddar
2013-11-26 7:35 ` [PATCH 14/17] drivers: mtd: m25p80: Adapt driver to support memory mapped read Sourav Poddar
2013-11-26 7:35 ` [PATCH 15/17] arm: dts: dra7: Add qspi device Sourav Poddar
2013-11-26 7:35 ` [PATCH 17/17] Documentation: bindings: ti-qspi: update binding information Sourav Poddar
2013-11-26 7:34 ` [PATCH 03/17] spi/qspi: parse register by name Sourav Poddar
2013-11-26 10:30 ` Mark Brown
[not found] ` <20131126103029.GY14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-26 11:17 ` Sourav Poddar
2013-11-26 12:24 ` Mark Brown
2013-11-28 4:45 ` Sourav Poddar
[not found] ` <5296CA5A.90304-l0cyMroinI0@public.gmane.org>
2013-11-28 10:54 ` Mark Brown
[not found] ` <20131128105423.GL14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-28 10:58 ` Sourav Poddar
[not found] ` <529721BF.4010902-l0cyMroinI0@public.gmane.org>
2013-11-28 11:11 ` Mark Brown
[not found] ` <20131128111152.GN14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-28 11:19 ` Sourav Poddar
2013-11-26 7:35 ` [PATCH 07/17] spi/qspi: configure set up register for memory map Sourav Poddar
2013-11-26 7:35 ` [PATCH 10/17] spi/spi.h: Add mmap flag in spi master Sourav Poddar
2013-11-26 7:35 ` [PATCH 11/17] spi/qspi: set "mmap" flag to true Sourav Poddar
[not found] ` <1385451313-1875-12-git-send-email-sourav.poddar-l0cyMroinI0@public.gmane.org>
2013-11-26 13:10 ` Mark Brown
[not found] ` <20131126131029.GI14725-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-11-26 13:11 ` Sourav Poddar
2013-11-26 7:35 ` [PATCH 16/17] arm: dts: am43x-epos: Add qspi device Sourav Poddar
2013-12-05 9:09 ` [PATCH 00/17] Add memory mapped support for ti qspi, m25p80 serial flash Sourav Poddar
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