linux-kernel - Re: [PATCHv2] DMAEngine: Let dmac drivers to set chan

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Message-ID: <CACRpkdbWHmob3EWJc6u5=yh=rNwVSR5hu9-Xud5kvQNU9-POtA@mail.gmail.com>
Date:	Fri, 22 Jul 2011 17:27:03 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Jassi Brar <jaswinder.singh@...aro.org>
Cc:	linux-kernel@...r.kernel.org, vinod.koul@...el.com,
	dan.j.williams@...el.com, rmk+kernel@....linux.org.uk,
	linus.walleij@...ricsson.com, per.friden@...ricsson.com,
	wei.zhang@...escale.com, ebony.zhu@...escale.com,
	iws@...o.caltech.edu, s.hauer@...gutronix.de,
	maciej.sosnowski@...el.com, saeed@...vell.com,
	shawn.guo@...escale.com, yur@...raft.com, agust@...x.de,
	iwamatsu.nobuhiro@...esas.com, per.forlin@...ricsson.com,
	jonas.aberg@...ricsson.com, anemo@....ocn.ne.jp
Subject: Re: [PATCHv2] DMAEngine: Let dmac drivers to set chan_id

On Thu, Jul 21, 2011 at 6:01 AM, Jassi Brar <jaswinder.singh@...aro.org> wrote:

> A DMAC driver might put chan_id to better use by directly
> mapping system-wide channel numbers on them (and not DMAC
> relative index).

Sorry, not following this, is the idea that instead of each DMAC
numbering its own channels [0...N] you want to establish a global
channel index number [0..N] that is unique across all DMACs
in the system, even if you have several of them?

Yours,
Linus Walleij
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