From: Timur Tabi <timur@freescale.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: ucc_uart: add support for Freescale QUICCEngine UART
Date: Tue, 04 Dec 2007 17:47:13 -0600 [thread overview]
Message-ID: <4755E701.3040908@freescale.com> (raw)
In-Reply-To: <200712050026.07616.arnd@arndb.de>
Arnd Bergmann wrote:
> You can argue that the QS is really a DMA device, but in that case you
> should convert the driver to use the DMA mapping interfaces correctly,
> which I would consider overkill.
I'm confused. I'm already calling dma_alloc_coherent() and getting a dma_addr_t
back. Why do I need to use mapping functions to convert between virtual and
physical/bus addresses?
--
Timur Tabi
Linux kernel developer at Freescale
next prev parent reply other threads:[~2007-12-04 23:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-04 17:51 ucc_uart: add support for Freescale QUICCEngine UART Timur Tabi
2007-12-04 22:13 ` Arnd Bergmann
2007-12-04 22:33 ` Timur Tabi
[not found] ` <200712050037.11489.arnd@arndb.de>
2007-12-05 17:06 ` Timur Tabi
2007-12-04 22:39 ` Timur Tabi
2007-12-04 23:26 ` Arnd Bergmann
2007-12-04 23:32 ` Scott Wood
2007-12-04 23:39 ` Arnd Bergmann
2007-12-04 23:44 ` Scott Wood
2007-12-04 23:47 ` Timur Tabi [this message]
2007-12-04 23:56 ` Arnd Bergmann
2007-12-05 0:59 ` Vitaly Bordug
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