linux-kernel - Re: [PATCH] dmaengine: delete redundant chan_id and chancnt initialization in dma drivers

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Message-ID: <20110922082205.GI17169@n2100.arm.linux.org.uk>
Date:	Thu, 22 Sep 2011 09:22:05 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Barry Song <21cnbao@...il.com>
Cc:	Jassi Brar <jassisinghbrar@...il.com>,
	Piotr Ziecik <kosmo@...ihalf.com>,
	Jaswinder Singh <jassi.brar@...sung.com>,
	Vinod Koul <vinod.koul@...el.com>,
	Pelagicore AB <info@...agicore.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	linux-kernel@...r.kernel.org, Yong Wang <yong.y.wang@...el.com>,
	Barry Song <Baohua.Song@....com>, dan.j.williams@...el.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] dmaengine: delete redundant chan_id and chancnt
	initialization in dma drivers

On Thu, Sep 22, 2011 at 08:08:44AM +0800, Barry Song wrote:
> actually i don't like the way dmaengine core handles chan_id. in my
> opinion, every dmac only needs to tell dmaengine core the chan_base.
> then dmaengine core set the id in a global scale.

Think about where we're heading with DT - with the description of the
hardware setup.  We're no longer interested in a global number from
0 to N.  We're more interested in per-device numbering.
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