linux-kernel - Re: [PATCH 0/5] ACPI probing infrastructure

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Message-ID: <55F2DFF7.6090301@arm.com>
Date:	Fri, 11 Sep 2015 15:06:47 +0100
From:	Marc Zyngier <marc.zyngier@....com>
To:	Hanjun Guo <hanjun.guo@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>, Tomasz Nowicki <tn@...ihalf.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Sudeep Holla <sudeep.holla@....com>,
	Will Deacon <will.deacon@....com>,
	Catalin Marinas <catalin.marinas@....com>
CC:	linaro-acpi@...ts.linaro.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/5] ACPI probing infrastructure

On 10/09/15 10:03, Hanjun Guo wrote:
> On 09/08/2015 09:19 PM, Hanjun Guo wrote:
>> Hi Marc,
>>
>> Sorry for the late response for quite a while...
>>
>> On 09/05/2015 01:06 AM, Marc Zyngier wrote:
>>> IRQ controllers and timers are the two types of device the kernel
>>> requires before being able to use the device driver model.
>>>
>>> ACPI so far lacks a proper probing infrastructure similar to the one
>>> we have with DT, where we're able to declare IRQ chips and
>>> clocksources inside the driver code, and let the core code pick it up
>>> and call us back on a match. This leads to all kind of really ugly
>>> hacks all over the arm64 code and even in the ACPI layer.
>>>
>>> It turns out that providing such a probing infrastructure is rather
>>> easy, and provides a much deserved cleanup in both the arch code, the
>>> GIC driver, and the architected timer driver.
>>>
>>> I'm sure there is some more code to be deleted, and one can only
>>> wonder why this wasn't done before the arm64 code was initially merged
>>> (the diffstat says it all...).
>>>
>>> Patches are against v4.2, and a branch is available at
>>>
>>> git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git
>>> acpi/device-probing
> 
> I pulled, and noticed that there is v2, it's cleaner than v1 for the
> patch 1/5 to me :)
> 
>>
>> Great thanks to cleanup these stuff, I will test
>> this patch set and review it, will get back to you
>> if I get anything.
> 
> I tested the v2 and it boots pretty happy as before, if
> you post to maillist,
> 
> Tested-by: Hanjun Guo <hanjun.guo@...aro.org>
> Reviewed-by: Hanjun Guo <hanjun.guo@...aro.org>

I'm still working on v2, so I'm afraid this is still a bit premature.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...
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