From: viresh.kumar@st.com (viresh kumar)
To: linux-arm-kernel@lists.infradead.org
Subject: [QUERY] amba/pl022: DMA channel allocation always fail.
Date: Mon, 16 May 2011 10:15:36 +0530 [thread overview]
Message-ID: <4DD0ABF0.3020707@st.com> (raw)
In-Reply-To: <BANLkTinMH9TpTTzqoMPS7JZUBRss3pScWg@mail.gmail.com>
On 05/13/2011 08:01 PM, Linus Walleij wrote:
> 2011/5/13 viresh kumar <viresh.kumar@st.com>:
>
>> amba/pl022 and my dma driver dw_dmac.c, both have registered init() routines
>> with subsys_initcall(). Now at bootup, spi boots up before DMA and so DMA
>> channels are never available at spi probe.
>>
>> What should be done to solve this issue?
>
> If you check drivers/dma/ste_dma40.c you can see that our solution was to
> simply move the DMA engine to arch_initcall().
>
> Which sort of makes sense for a DMA engine.
>
> Does this work for dw_dmac.c?
Yes, it worked here too..
--
viresh
prev parent reply other threads:[~2011-05-16 4:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-13 12:01 [QUERY] amba/pl022: DMA channel allocation always fail viresh kumar
2011-05-13 14:31 ` Linus Walleij
2011-05-16 4:45 ` viresh kumar [this message]
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