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Groups > linux.kernel > #1313377
| From | Mark Rutland <mark.rutland@arm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller |
| Date | 2016-01-20 18:10 +0100 |
| Message-ID | <qT4qB-1bh-5@gated-at.bofh.it> (permalink) |
| References | (1 earlier) <qSkxs-2ZZ-29@gated-at.bofh.it> <qSla9-3jC-5@gated-at.bofh.it> <qT3uy-vq-5@gated-at.bofh.it> <qT3Ed-yP-3@gated-at.bofh.it> <qT3NU-CC-13@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Jan 20, 2016 at 05:24:14PM +0100, Marc Gonzalez wrote:
> On 20/01/2016 17:10, Måns Rullgård wrote:
>
> > Marc Zyngier wrote:
> >
> >>> + if (of_property_read_u32(node, "reg", &ctl))
> >>> + panic("%s: failed to get reg base", node->name);
> >>> +
> >>> + chip = kzalloc(sizeof(*chip), GFP_KERNEL);
> >>> + chip->ctl = ctl;
> >>> + chip->base = base;
> >
> > As I said before, this assumes the outer DT node uses a ranges
> > property. Normally reg properties work the same whether they specify an
> > offset within an outer "ranges" or have a full address directly. It
> > would be easy enough to make this work with either, so I don't see any
> > reason not to.
>
> IIRC, I was told very early in the review process that the ranges prop
> was mandatory. Lemme look for it... It was Arnd:
>
> http://thread.gmane.org/gmane.linux.ports.arm.kernel/444131/focus=444207
I believe Arnd's point was that you need _a_ ranges property, rather
than specifically requiring an idmap/empty ranges property.
As Marc pointed out, you can use of_iomap on the child nodes to map the
portions described by the reg properties, which will handle any
ranges-based translation automatically.
When you put together the binding document, please point out that the
ranges property is necessary.
Thanks,
Mark.
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[RFC PATCH v2] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-18 14:10 +0100
Re: [RFC PATCH v2] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-18 14:10 +0100
Re: [RFC PATCH v2] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-18 17:10 +0100
[RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-18 17:50 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Zyngier <marc.zyngier@arm.com> - 2016-01-20 17:10 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-20 17:20 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-20 17:30 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-20 17:40 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-20 17:40 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-20 17:50 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-20 19:10 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-22 17:00 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-22 17:40 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-22 17:40 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-22 17:40 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-22 17:50 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-22 17:50 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Zyngier <marc.zyngier@arm.com> - 2016-01-20 17:30 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-20 17:30 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-20 17:30 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Marc Gonzalez <marc_gonzalez@sigmadesigns.com> - 2016-01-20 18:10 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-20 18:10 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Mark Rutland <mark.rutland@arm.com> - 2016-01-20 18:10 +0100
Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller Måns Rullgård <mans@mansr.com> - 2016-01-20 18:10 +0100
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