linux-kernel - Re: dmaengine.c: question about device_alloc_chan

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Message-ID: <20080919162853.773f1796@lxorguk.ukuu.org.uk>
Date:	Fri, 19 Sep 2008 16:28:53 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"linux-os (Dick Johnson)" <linux-os@...logic.com>
Cc:	"Timur Tabi" <timur@...escale.com>,
	"Haavard Skinnemoen" <haavard.skinnemoen@...el.com>,
	"Dan Williams" <dan.j.williams@...el.com>,
	"lkml" <linux-kernel@...r.kernel.org>
Subject: Re: dmaengine.c: question about device_alloc_chan_resources

> > I could use this feature.  The sound drivers for our MPC8610 processor use DMA,
> > but the drivers need to control the DMA hardware directly, so I can't use
> > dmaengine.  I would like to be able to just reserve the channels and program
> > them as I see fit.


> The hardware on the PC/AT machines won't allow you to
> reserve a specific channel and program it as you see fit,

And since when have MPC8610 processors been used in PC/AT systems ?

PC type ISA DMA is a special (mostly PC specific) interface of its own.

Alan
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