From: Olof Johansson <olof@lixom•net>
To: Timur Tabi <timur@freescale•com>
Cc: linuxppc-dev@ozlabs•org, alsa-devel@alsa-project•org,
david@gibson•dropbear.id.au
Subject: Re: [alsa-devel] [PATCH v2] [ALSA] Add ASoC drivers for the Freescale MPC8610 SoC
Date: Thu, 10 Jan 2008 18:24:50 -0600 [thread overview]
Message-ID: <20080111002450.GA13291@lixom.net> (raw)
In-Reply-To: <4786A650.2080107@freescale.com>
On Thu, Jan 10, 2008 at 05:12:16PM -0600, Timur Tabi wrote:
> Grant Likely wrote:
>
> > Does the driver access the DMA and GUTS registers directly? If so,
> > what do you have to protect against race conditions of other drivers
> > accessing them also.
>
> I don't have any more protection than any other driver that accesses SOC
> registers directly. Last I heard, Zhang's DMA driver was in limbo, and that
> driver would be the best place to arbitrate DMA register access. I was planning
> on adding arbitration support to that driver after both drivers were applied.
Having been in a similar situation myself (needing to share resources
between DMA, ethernet and function offload), I recommend creating a
separate small library that all those drivers use, instead of making
some sort of dependency between drivers in completely different parts
of the kernel.
-Olof
next prev parent reply other threads:[~2008-01-11 0:15 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-10 22:44 [PATCH 0/2] ASoC drivers for the Freescale MPC8610 SoC Timur Tabi
2008-01-10 22:44 ` [PATCH v3] [POWERPC] Update MPC8610 HPCD to support audio drivers Timur Tabi
2008-01-10 22:44 ` [PATCH v2] [ALSA] Add ASoC drivers for the Freescale MPC8610 SoC Timur Tabi
2008-01-10 23:02 ` Grant Likely
2008-01-10 23:12 ` [alsa-devel] " Timur Tabi
2008-01-10 23:17 ` Grant Likely
2008-01-10 23:19 ` Timur Tabi
2008-01-11 0:24 ` Olof Johansson [this message]
2008-01-11 15:08 ` Timur Tabi
2008-01-10 22:52 ` [PATCH v3] [POWERPC] Update MPC8610 HPCD to support audio drivers Grant Likely
2008-01-10 23:00 ` Scott Wood
2008-01-18 6:48 ` Kumar Gala
2008-01-18 14:48 ` [alsa-devel] " Timur Tabi
2008-01-18 15:18 ` Kumar Gala
2008-01-18 15:40 ` Takashi Iwai
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