From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: Nicolas Ferre <nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
Cc: vinod.koul-VuQAYsv1563Yd54FQh9/CA@public.gmane.org,
Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH v2 1/2] of: Add generic device tree DMA helpers
Date: Tue, 20 Mar 2012 13:03:10 +0000 [thread overview]
Message-ID: <201203201303.11175.arnd@arndb.de> (raw)
In-Reply-To: <6b5dc1fadfd03a48093338b6981c0a7ae7662212.1332237596.git.nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
On Tuesday 20 March 2012, Nicolas Ferre wrote:
>
> Add some basic helpers to retrieve a DMA controller device_node and the
> DMA request specifications. By making DMA controllers register a generic
> translation function, we allow the management of any type of DMA requests
> specification.
> The void * output of an of_dma_xlate() function that will be implemented
> by the DMA controller can carry any type of "dma-request" argument.
>
> The DMA client will search its associated DMA controller in the list and
> call the registered of_dam_xlate() function to retrieve the request values.
>
> One simple xlate function is provided for the "single number" type of
> request binding.
>
> This implementation is independent from dmaengine so it can also be used
> by legacy drivers.
Thanks a lot of posting this updated version, I think it will be very
useful as we proceed. I still hope that in the end we find that the
differences are not all that big and we can do it all with bindings
very much like what you have here.
Arnd
next prev parent reply other threads:[~2012-03-20 13:03 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-27 17:29 [RFC PATCH 1/2] of: Add generic device tree DMA helpers Cousson, Benoit
2012-01-27 18:13 ` Stephen Warren
2012-01-27 20:36 ` Cousson, Benoit
2012-01-28 18:12 ` Grant Likely
2012-01-28 18:06 ` Grant Likely
2012-01-31 21:26 ` Cousson, Benoit
2012-02-02 4:52 ` Grant Likely
2012-01-31 23:09 ` Russell King - ARM Linux
2012-02-01 10:50 ` Cousson, Benoit
[not found] ` <4F2918F6.9040100-l0cyMroinI0@public.gmane.org>
2012-02-02 8:45 ` Russell King - ARM Linux
[not found] ` <20120202084539.GC1275-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2012-02-02 8:54 ` Cousson, Benoit
2012-02-22 10:59 ` Nicolas Ferre
2012-02-23 10:03 ` Cousson, Benoit
2012-02-23 15:51 ` Nicolas Ferre
2012-02-23 15:57 ` Cousson, Benoit
[not found] ` <4F4661DE.90704-l0cyMroinI0@public.gmane.org>
2012-02-27 13:09 ` Nicolas Ferre
2012-02-27 14:22 ` Cousson, Benoit
2012-02-27 17:28 ` Nicolas Ferre
2012-02-29 14:54 ` [RFC PATCH] of: DMA helpers: manage generic requests specification Nicolas Ferre
2012-02-29 20:54 ` Stephen Warren
2012-03-05 13:14 ` Cousson, Benoit
2012-03-05 18:30 ` Stephen Warren
2012-03-05 19:57 ` Russell King - ARM Linux
2012-03-05 10:55 ` Cousson, Benoit
2012-03-05 15:36 ` Grant Likely
2012-03-14 17:47 ` Nicolas Ferre
2012-03-14 18:16 ` Stephen Warren
[not found] ` <4F22DEF2.5000807-l0cyMroinI0@public.gmane.org>
2012-03-15 8:38 ` [PATCH] of: Add generic device tree DMA helpers Nicolas Ferre
2012-03-15 9:22 ` Arnd Bergmann
2012-03-15 9:26 ` Russell King - ARM Linux
2012-03-15 10:09 ` Arnd Bergmann
2012-03-17 9:42 ` Grant Likely
2012-03-17 16:03 ` Arnd Bergmann
2012-03-18 9:08 ` Grant Likely
2012-03-15 10:27 ` Thierry Reding
2012-03-17 10:47 ` Grant Likely
2012-03-18 9:22 ` Thierry Reding
2012-03-18 15:10 ` Arnd Bergmann
2012-03-18 18:22 ` Grant Likely
2012-03-19 13:02 ` Mark Brown
2012-03-19 15:01 ` Arnd Bergmann
2012-03-19 15:07 ` Stephen Warren
2012-03-19 15:45 ` Arnd Bergmann
[not found] ` <201203191545.40933.arnd-r2nGTMty4D4@public.gmane.org>
2012-03-19 16:54 ` Stephen Warren
2012-03-15 16:30 ` Cousson, Benoit
2012-03-15 19:57 ` Russell King - ARM Linux
[not found] ` <20120315195753.GA2842-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2012-03-15 20:41 ` Arnd Bergmann
2012-03-15 21:39 ` Cousson, Benoit
2012-03-15 21:55 ` Russell King - ARM Linux
2012-03-16 9:56 ` Arnd Bergmann
2012-03-20 14:02 ` Matt Porter
2012-03-15 23:45 ` Nicolas Pitre
2012-03-16 10:03 ` Arnd Bergmann
2012-03-16 11:19 ` Cousson, Benoit
2012-03-16 12:04 ` Arnd Bergmann
2012-03-16 13:28 ` Cousson, Benoit
2012-03-16 13:36 ` Nicolas Ferre
2012-03-17 9:40 ` Grant Likely
2012-03-18 20:13 ` Arnd Bergmann
2012-03-18 20:44 ` Grant Likely
2012-03-18 21:58 ` Arnd Bergmann
2012-03-18 22:12 ` Arnd Bergmann
2012-03-19 13:37 ` Nicolas Ferre
2012-03-19 15:20 ` Russell King - ARM Linux
2012-03-19 15:58 ` Cousson, Benoit
2012-03-19 13:30 ` Nicolas Ferre
2012-03-19 14:06 ` Arnd Bergmann
2012-03-19 15:33 ` Russell King - ARM Linux
2012-03-19 16:11 ` Arnd Bergmann
2012-03-19 18:06 ` Jassi Brar
2012-03-19 16:31 ` Nicolas Ferre
2012-03-19 17:49 ` Cousson, Benoit
2012-03-19 14:45 ` Grant Likely
2012-03-20 14:54 ` Nicolas Ferre
2012-03-20 10:13 ` [PATCH v2 1/2] " Nicolas Ferre
2012-03-20 10:13 ` [PATCH 2/2] of: selftest/dma: Add selftest for new DT DMA request helpers Nicolas Ferre
2012-03-20 14:16 ` Grant Likely
2012-03-20 10:17 ` [PATCH] of: dma/fixup Nicolas Ferre
[not found] ` <6b5dc1fadfd03a48093338b6981c0a7ae7662212.1332237596.git.nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
2012-03-20 13:03 ` Arnd Bergmann [this message]
2012-03-20 15:38 ` [PATCH v2 1/2] of: Add generic device tree DMA helpers Stephen Warren
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