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Groups > linux.kernel > #1313348
| From | Måns Rullgård <mans@mansr.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC PATCH v3] irqchip: Add support for Tango interrupt controller |
| Date | 2016-01-20 17:40 +0100 |
| Message-ID | <qT3XB-HX-19@gated-at.bofh.it> (permalink) |
| References | (3 earlier) <qT3uy-vq-5@gated-at.bofh.it> <qT3Ed-yP-3@gated-at.bofh.it> <qT3NT-CC-3@gated-at.bofh.it> <qT3NT-CC-1@gated-at.bofh.it> <qT3XA-HX-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Marc Gonzalez <marc_gonzalez@sigmadesigns.com> writes:
> On 20/01/2016 17:25, Måns Rullgård wrote:
>
>> Marc Zyngier <marc.zyngier@arm.com> writes:
>>
>>> On 20/01/16 16:10, Måns Rullgård wrote:
>>>
>>>> Marc Zyngier <marc.zyngier@arm.com> writes:
>>>>
>>>>>> + 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.
>>>
>>> Yup, that is a good point. I guess Marc can address this in the next
>>> round, since we need a DT binding anyway.
>>
>> I'd suggest using of_address_to_resource() on both nodes and subtracting
>> the start addresses returned.
>
> For my own reference, Marc Zyngier suggested:
> "you should use of_iomap to map the child nodes, and not mess with
> the parent one."
That's going to get very messy since the generic irqchip code needs all
the registers as offsets from a common base address.
--
Måns Rullgård
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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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