linux-kernel - Re: [PATCH v3 11/15] mfd: menelaus: Start to use irqdomain

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Message-ID: <20131210183749.GC2390@lee--X1>
Date:	Tue, 10 Dec 2013 18:37:49 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Felipe Balbi <balbi@...com>
Cc:	Tony Lindgren <tony@...mide.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 11/15] mfd: menelaus: Start to use irqdomain

> > > Introduce an irq_chip and irq_domain for menelaus driver. Following
> > > patches will convert uses to traditional request_threaded_irq().
> > > 
> > > While at that, some better error handling had to be added, so we could
> > > free irq descs we allocated.
> > > 
> > > Tested-by: Aaro Koskinen <aaro.koskinen@....fi>
> > > Signed-off-by: Felipe Balbi <balbi@...com>
> > > ---
> > >  drivers/mfd/menelaus.c | 127 ++++++++++++++++++++++++++++++++++++++++++++++---
> > 
> > <snip>
> > 
> > > +	irq_domain_add_legacy(node, MENELAUS_NR_IRQS, irq_base, 0,
> > > +			&irq_domain_simple_ops, m);
> > 
> > When will this driver become DT compliant?
> 
> when OMAP2 becomes DT-compliant. It still boots with legacy board-file +
> platform_data.

Really? Tony, are there any plans to DT the platform?

Felipe, what did you think about using irq_domain_add_simple()?

> > > +	m->irq_base = irq_base;
> > > +
> > > +	for (i = irq_base; i < irq_base + MENELAUS_NR_IRQS; i++) {
> > > +		irq_set_chip_data(i, m);
> > > +		irq_set_chip_and_handler(i, &menelaus_irq_chip,
> > > +				handle_simple_irq);
> > > +		irq_set_nested_thread(i, 1);
> > > +		set_irq_flags(i, IRQF_VALID);
> > 
> > This assumes that this h/w only exists on ARM platforms. Is that true?
> 
> it was made *only* for Nokia to use on their ARM-only internet tablets.

If the IP is genuinely not reusable, them I'm fine with it.

I see that the Kconfig is setup in the correct way too, so we're good.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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