From: Ashish Jangam <ashish.jangam@kpitcummins.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: <linux-kernel@vger.kernel.org>, David Dajun Chen <dchen@diasemi.com>
Subject: Re: virtual irq isssue - regmap_irq
Date: Thu, 7 Mar 2013 17:22:35 +0530 [thread overview]
Message-ID: <1362657155.1796.4.camel@dhruva> (raw)
In-Reply-To: <20130307071349.GF22554@opensource.wolfsonmicro.com>
On Thu, 2013-03-07 at 15:13 +0800, Mark Brown wrote:
> On Thu, Mar 07, 2013 at 12:27:52PM +0530, Ashish Jangam wrote:
>
> > In regmap_irq if irq_base is unknown then regmap creates virq starting from 0
> > and it seems that in kernel 3.8 virq 0 usage is not permitted, since during irq
> > registration kernel throws a message "error: irq_desc already associated".
>
> > I'm not sure if this requires fix in regmap_irq or kernel, can you please
> > comment on this?
>
> This is a bug in your platform which will affect anything using a linear
> domain. The platform isn't setting up its interrupts correctly so that
> the core knows that those interrupts are reserved, ideally the platform
> would just use domains for everything but at least irq_alloc_decs()
> needs to know what is going on.
Thanks I got this, however in this case should regmap handle such
condition where domain is unknown?
By the way, I was testing on smdkv6410 where Dialog device is not a
component of the board.
next prev parent reply other threads:[~2013-03-07 11:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-07 6:57 virtual irq isssue - regmap_irq Ashish Jangam
2013-03-07 7:13 ` Mark Brown
2013-03-07 11:52 ` Ashish Jangam [this message]
2013-03-07 14:22 ` Mark Brown
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