linux-kernel - Re: "Virtual" Interrupts -- Need help please

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Date:	Mon, 9 Sep 2013 12:06:40 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Daniel Santos <daniel.santos@...ox.com>
Cc:	linux-gpio <linux-gpio@...r.kernel.org>,
	linux-usb <linux-usb@...r.kernel.org>,
	linux-spi <linux-spi@...r.kernel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: "Virtual" Interrupts -- Need help please

On Sat, Sep 07, 2013 at 07:19:06PM -0500, Daniel Santos wrote:

> So do i create an IRQ domain and then call generic_handle_irq() from
> my URB complete() function? If so, which type of IRQ Domain is
> appropriate for this? Unlike typical platform devices, these are
> dynamically added and removed throughout the life of the kernel,
> adding to the challenge.  So, if I understand correctly, my base IRQ
> number needs to be dynamically generated.  How should I manage this?

Unless you have a particular reason for using something else you should
be using a linear domain - that's the default, it's very simple to work
with.

> I have some secondary (and less important) questions about how to
> integrate this with device drivers that want a DT / open firmware
> config (which I know almost nothing about at this time), but that
> can wait.

Could you be more specific about what you mean by "integrate" here?

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