linux-kernel - Re: [RFC PATCH 2/3] mailbox: Hisilicon: add mailbox driver

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Date:	Tue, 4 Aug 2015 17:56:26 +0800
From:	Leo Yan <leo.yan@...aro.org>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Wei Xu <xuwei5@...ilicon.com>,
	Bintian Wang <bintian.wang@...wei.com>,
	Haojian Zhuang <haojian.zhuang@...aro.org>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Guodong Xu <guodong.xu@...aro.org>,
	Jian Zhang <zhangjian001@...ilicon.com>,
	Zhenwei Wang <Zhenwei.wang@...ilicon.com>,
	Haoju Mo <mohaoju@...ilicon.com>,
	Dan Zhao <dan.zhao@...ilicon.com>, kongfei@...ilicon.com,
	Guangyue Zeng <zengguangyue@...ilicon.com>
Subject: Re: [RFC PATCH 2/3] mailbox: Hisilicon: add mailbox driver

On Tue, Aug 04, 2015 at 11:17:39AM +0200, Paul Bolle wrote:
> On di, 2015-08-04 at 16:49 +0800, Leo Yan wrote:
> > On Tue, Aug 04, 2015 at 10:30:24AM +0200, Paul Bolle wrote:
> > > On ma, 2015-08-03 at 09:13 +0800, Leo Yan wrote:
> > > > --- /dev/null
> > > > +++ b/drivers/mailbox/hisilicon/Kconfig
> > > 
> > > > +config HISI_MBOX
> > > > +	bool "Hisilicon's Mailbox"
> > > > +	depends on ARCH_HISI || OF
> > > 
> > > ARCH_HISI is available on either ARM64 or ARM. ARM64 selects OF. On ARM
> > > ARCH_HISI depends on ARCH_MULTIV7 which depends on ARCH_MULTIPLATFORM.
> > > That selects USE_OF which on its turn selects OF.
> > > 
> > > So, HISI_MBOX implies OF, correct?
> > 
> > Exactly, will simply use "depends on ARCH_HISI".
> 
> That change would alter the dependencies. My remark was made just to
> make clear why I think CONFIG_OF will always be defined. But now I guess
> you actually meant
> 	depends on ARCH_HISI && OF

Correct, shame for my wrong logic :)

> And that would, I think, indeed be equivalent to
> 	depends on ARCH_HISI

Thanks,
Leo Yan
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