From mboxrd@z Thu Jan  1 00:00:00 1970
From: b32955@freescale.com (Huang Shijie)
Date: Thu, 18 Oct 2012 17:13:11 +0800
Subject: [PATCH] dma: add new DMA control commands
In-Reply-To: <201210181049.21556.marex@denx.de>
References: <1350538335-29026-1-git-send-email-b32955@freescale.com>
 <201210181016.06782.marex@denx.de> <507FC290.10205@freescale.com>
 <201210181049.21556.marex@denx.de>
Message-ID: <507FC827.40601@freescale.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

? 2012?10?18? 16:49, Marek Vasut ??:
> Dear Huang Shijie,
>
>> ? 2012?10?18? 16:16, Marek Vasut ??:
>>> So we can't stream data from the chip? About time to adjust the MTD
>>> framework to allow that. Maybe implement a command queue?
>> IMHO, it's not possible. Because the READ-PAGE(00h-30h) command needs to
>> check the busy status
>> which means we have to stop in the middle, so we can not chain the all
>> the read-pages DMA commands.
> Can the DMA not branch?
it's too complicated to the MTD layer, as well as the gpmi driver.

Best Regards
Huang Shijie