linux-kernel - Re: [PATCH 5/6 v3] mfd: tps65910-irq: Add devicetree init support

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Date:	Tue, 08 May 2012 12:11:31 -0700
From:	Rhyland Klein <rklein@...dia.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Liam Girdwood <lrg@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>
Subject: Re: [PATCH 5/6 v3] mfd: tps65910-irq: Add devicetree init support

On Tue, 2012-05-08 at 08:48 -0700, Mark Brown wrote:
> * PGP Signed by an unknown key
> 
> On Tue, May 08, 2012 at 11:42:42AM -0700, Rhyland Klein wrote:
> 
> > +	if (pdata->irq_base <= 0)
> > +		pdata->irq_base = irq_alloc_descs(-1, 0, tps65910->irq_num, -1);
> > +
> > +	if (pdata->irq_base <= 0) {
> > +		dev_err(tps65910->dev, "Failed to allocate irq descs: %d\n",
> > +			pdata->irq_base);
> > +		return pdata->irq_base;
> > +	}
> 
> I'd expect the driver to always call irq_alloc_descs() but to use the
> value specified in platform data if there is any.  This is the normal
> way of doing things, anyway.
> 

Is this more what you would expect? If the dt code initialized the
irq_base to 0 instead of -1 then this should also work.

pdata->irq_base = irq_alloc_descs(-1, pdata->irq_base,
			tps65910->irq_num, -1);

if (pdata->irq_base <= 0) {
	dev_err(tps65910->dev, "Failed to allocate irq descs: %d\n",
		pdata->irq_base);
	return pdata->irq_base;
}

> * Unknown Key
> * 0x6E30FDDD

-- 
nvpublic

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