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

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Date:	Thu, 10 Sep 2015 17:03:15 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	Marc Zyngier <marc.zyngier@....com>,
	"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 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>

Thanks
Hanjun
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