From: arnd@arndb•de (Arnd Bergmann)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 1/5] dmaengine: dw_dmac: move to generic DMA binding
Date: Wed, 30 Jan 2013 10:08:30 +0000 [thread overview]
Message-ID: <201301301008.31196.arnd@arndb.de> (raw)
In-Reply-To: <CAOh2x==WZePgfTWwL0vPdE693n44vW05OS=DSqbnDCs2xzHXuw@mail.gmail.com>
On Wednesday 30 January 2013, Viresh Kumar wrote:
> On Wed, Jan 30, 2013 at 3:11 PM, Arnd Bergmann <arnd@arndb•de> wrote:
> > On Wednesday 30 January 2013, Viresh Kumar wrote:
> >> I knew you will come to this :)
> >> So, the hardware is like: there are 16 request line slots per master, a
> >> platform can choose to connect same or separate devices to these.
> >>
> >> So, these are really 16 per master.
> >
> > Ok, I see. Do you know how these are numbered in the data sheet?
> >
> > If the convention is to have subsequent numbers for these in the
> > hardware description, we should probably just have that single
> > request number in the binding, too, and calculate the master number
> > from that. If it lists pairs of request/master number, we should
> > use pairs in the binding as well, in the same order.
>
> Actually what would be better to have is:
> - have this range from 0-15 only
> - together with the master we want to use for peripheral
>
> this should be enough.
Ok.
> Datasheet of dw_dmac doesn't tell much about it.. just four bits for programming
> it and so values are from 0-15 :)
I meant the spear13xx data sheet, which has to list the request lines
for its integrated components. There may be other SoCs using the
same dw_dmac, but this is the main one that is upstream now, and it's
probably as good as any other one. I just wouldn't want to establish
a binding that doesn't match any of the known implementations in the
way it expresses request lines.
Arnd
next prev parent reply other threads:[~2013-01-30 10:08 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1359395857-1235-1-git-send-email-arnd@arndb.de>
2013-01-28 21:58 ` [PATCH v2 0/5] dmaengine: convert dw_dmac/spear13xx to generic binding Arnd Bergmann
2013-01-28 21:58 ` [PATCH 1/5] dmaengine: dw_dmac: move to generic DMA binding Arnd Bergmann
2013-01-29 7:24 ` Viresh Kumar
2013-01-29 10:35 ` Arnd Bergmann
2013-01-29 10:49 ` Viresh Kumar
2013-01-29 10:54 ` Andy Shevchenko
2013-01-29 10:57 ` Viresh Kumar
2013-01-29 11:14 ` Andy Shevchenko
2013-01-29 13:31 ` Arnd Bergmann
2013-01-29 13:45 ` Andy Shevchenko
2013-01-29 14:26 ` Russell King - ARM Linux
2013-01-29 15:28 ` Arnd Bergmann
2013-01-29 15:17 ` Viresh Kumar
2013-01-29 16:21 ` Arnd Bergmann
2013-01-30 2:04 ` Viresh Kumar
2013-01-30 9:41 ` Arnd Bergmann
2013-01-30 9:48 ` Viresh Kumar
2013-01-30 10:08 ` Arnd Bergmann [this message]
2013-01-30 10:32 ` Viresh Kumar
[not found] ` <1359445171.31148.30.camel@smile>
2013-01-29 10:50 ` Arnd Bergmann
2013-01-29 11:18 ` Russell King - ARM Linux
2013-01-29 13:44 ` Arnd Bergmann
2013-01-29 14:24 ` Russell King - ARM Linux
2013-01-29 14:55 ` Arnd Bergmann
2013-01-29 15:44 ` Russell King - ARM Linux
2013-01-29 16:36 ` Arnd Bergmann
2013-01-29 17:45 ` Russell King - ARM Linux
2013-01-29 20:40 ` Arnd Bergmann
2013-01-29 21:59 ` Linus Walleij
2013-02-15 8:50 ` Andy Shevchenko
2013-02-15 11:17 ` Arnd Bergmann
2013-01-28 21:58 ` [PATCH 2/5] spi: pl022: use generic DMA slave configuration if possible Arnd Bergmann
2013-01-29 2:41 ` Mark Brown
2013-01-29 7:49 ` Andy Shevchenko
2013-01-29 13:13 ` Arnd Bergmann
2013-02-07 18:29 ` Linus Walleij
2013-02-07 19:42 ` Arnd Bergmann
2013-02-07 20:19 ` Linus Walleij
2013-02-07 21:15 ` Arnd Bergmann
2013-02-08 16:22 ` Russell King - ARM Linux
2013-02-08 16:28 ` Arnd Bergmann
2013-02-08 22:10 ` Linus Walleij
2013-02-08 16:20 ` Russell King - ARM Linux
2013-01-28 21:58 ` [PATCH 3/5] serial: pl011: " Arnd Bergmann
2013-01-30 4:38 ` Greg Kroah-Hartman
2013-01-28 21:58 ` [PATCH 4/5] ata: arasan: remove the need for platform_data Arnd Bergmann
2013-01-29 8:18 ` Viresh Kumar
2013-01-28 21:58 ` [PATCH 5/5] ARM: SPEAr13xx: Pass generic DW DMAC platform data from DT Arnd Bergmann
2013-01-29 8:16 ` Viresh Kumar
2013-01-29 13:21 ` Arnd Bergmann
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