[PATCH 16/16] ARM: imx: enable SPARSE_IRQ for imx platform

Dong Aisheng aisheng.dong at freescale.com
Tue Jun 19 03:21:11 EDT 2012

On Tue, Jun 19, 2012 at 02:47:44PM +0800, Shawn Guo wrote:
> On Tue, Jun 19, 2012 at 02:16:38PM +0800, Dong Aisheng wrote:
> > > > Ideally i would see we keep the code as before that still using hw irqs
> > > > for device resource definition, but convert to linux virt irq in a standard
> > > > irqdomain map way when adding devices by calling imx_add_platform_device.
> > > > 
> > > What's the point of hiding this irq number conversion in
> > > imx_add_platform_device?  
> > It's standard and safe way.
> > 
> Why do you think it's standard?
Why do you think using irq_find_mapping to get the linux virt irq is not
standard way?

> Care to show me a couple of examples
> that make this conversion when adding platform device?
I did not search any example, currently it's just my idea based on my understanding
on irq domain design. Maybe i should give a patch to describe my idea,
then we can discuss on the patch.

Or did you see any example on using shift way to define device irq resource?
Then i can look at it.

> > > The irq number used in resource definition
> > > should simply just be Linux irq.  Doing what you suggest here will
> > No, it's should be hw irq.
> You are simply wrong here.  Nothing more to respond on this.
If using linux virt irq, how do we avoid the issues i said in my last reply?

Dong Aisheng

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