linux-kernel - Re: [RFC part2 PATCH 7/9] irqdomain: Add a new API irq_create_acpi

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Date:	Tue, 10 Dec 2013 11:06:22 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Hanjun Guo <hanjun.guo@...aro.org>
Cc:	Rob Herring <robherring2@...il.com>,
	Mark Rutland <mark.rutland@....com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Linaro Patches <patches@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Amit Daniel Kachhap <amit.daniel@...sung.com>,
	Rob Herring <rob.herring@...xeda.com>,
	Olof Johansson <olof@...om.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Grant Likely <grant.likely@...aro.org>
Subject: Re: [RFC part2 PATCH 7/9] irqdomain: Add a new API irq_create_acpi_mapping()

On Wed, Dec 4, 2013 at 4:38 PM, Hanjun Guo <hanjun.guo@...aro.org> wrote:
> On 2013年12月04日 01:25, Rob Herring wrote:
>> On Tue, Dec 3, 2013 at 10:39 AM, Hanjun Guo <hanjun.guo@...aro.org> wrote:
>>>
>>> From: Amit Daniel Kachhap <amit.daniel@...sung.com>
>>>
>>> This patch introduces a new API for acpi based irq mapping.
>>>
>>> [hanjun: Rework this patch to delete the reference to
>>> gic_irq_domain_xlate() which can simplify the code a lot.]
>>>
>>> Signed-off-by: Amit Daniel Kachhap <amit.daniel@...sung.com>
>>> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
(...)
>>> +EXPORT_SYMBOL_GPL(irq_create_acpi_mapping);
>>
>> There is nothing ACPI specific about this function. This is simply
>> irq_create_of_mapping w/o translating of_phandle_args to a hwirq and
>> type. So I expect the code to be re-factored here to mirror that.
>
> Sorry for my bad english, do you mean create a OF free function
> and call that from the OF function ?

Sounds like a good idea, like if you move the OF function into
kernel/irq/irqdomain.c and get rid of the OF specific naming
then use that same function from ACPI too. It's all about
using the irq_default_domain in a standard way after all right?

Yours,
Linus Walleij
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