linux-kernel - Re: [PATCH v5 1/5] ARM: mediatek: Add config options for mediatek SoCs.

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Message-ID: <1422354858.14015.39.camel@x220>
Date:	Tue, 27 Jan 2015 11:34:18 +0100
From:	Paul Bolle <pebolle@...cali.nl>
To:	Yingjoe Chen <yingjoe.chen@...iatek.com>
Cc:	Valentin Rothberg <valentinrothberg@...il.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Hongzhou Yang <hongzhou.yang@...iatek.com>,
	Rob Herring <robh+dt@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Grant Likely <grant.likely@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Vladimir Murzin <vladimir.murzin@....com>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, dandan.he@...iatek.com,
	alan.cheng@...iatek.com, toby.liu@...iatek.com,
	maoguang.meng@...iatek.com, huang eddie <eddie.huang@...iatek.com>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...soft.com>
Subject: Re: [PATCH v5 1/5] ARM: mediatek: Add config options for mediatek
 SoCs.

Hi Joe,

On Tue, 2015-01-27 at 18:26 +0800, Yingjoe Chen wrote:
> On Tue, 2015-01-27 at 11:16 +0100, Paul Bolle wrote:
> > On Thu, 2015-01-22 at 13:54 +0100, Matthias Brugger wrote:
> > > 2015-01-21 6:28 GMT+01:00 Hongzhou Yang <hongzhou.yang@...iatek.com>:
> > > > From: Yingjoe Chen <yingjoe.chen@...iatek.com>
> > > >
> > > > The upcoming MTK pinctrl driver have a big pin table for each SoC
> > > > and we don't want to bloat the kernel binary if we don't need it.
> > > > Add config options so we can build for one SoC only.
> > > >
> > > > Acked-by: Linus Walleij <linus.walleij@...aro.org>
> > > > Signed-off-by: Yingjoe Chen <yingjoe.chen@...iatek.com>
> > > > Signed-off-by: Hongzhou Yang <hongzhou.yang@...iatek.com>
> > > 
> > > Applied to v3.20-next/soc
> > 
> > This became commit ad8a221e1f49 ("ARM: mediatek: Add config options for
> > mediatek SoCs.") in today's linux-next (ie, next-20150127). I noticed
> > because a script I use to check linux-next spotted a problem with it.
> > 
> > > > ---
> > > >  arch/arm/mach-mediatek/Kconfig | 22 +++++++++++++++++++++-
> > > >  1 file changed, 21 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig
> > > > index f73f588..f7e463c 100644
> > > > --- a/arch/arm/mach-mediatek/Kconfig
> > > > +++ b/arch/arm/mach-mediatek/Kconfig
> > > > @@ -1,6 +1,26 @@
> > > > -config ARCH_MEDIATEK
> > > > +menuconfig ARCH_MEDIATEK
> > > >         bool "Mediatek MT65xx & MT81xx SoC" if ARCH_MULTI_V7
> > > >         select ARM_GIC
> > > >         select MTK_TIMER
> > > >         help
> > > >           Support for Mediatek MT65xx & MT81xx SoCs
> > > > +
> > > > +if ARCH_MEDIATEK
> > > > +
> > > > +config MACH_MT6589
> > > > +       bool "MediaTek MT6589 SoCs support"
> > > > +       default ARCH_MEDIATEK
> > > > +
> > > > +config MACH_MT6592
> > > > +       bool "MediaTek MT6592 SoCs support"
> > > > +       default ARCH_MEDIATEK
> > > > +
> > > > +config MACH_MT8127
> > > > +       bool "MediaTek MT8127 SoCs support"
> > > > +       default ARCH_MEDIATEK
> > > > +
> > > > +config MACH_MT8135
> > > > +       bool "MediaTek MT8135 SoCs support"
> > > > +       default ARCH_MEDIATEK
> > > > +
> > > > +endif
> > 
> > None of these four new MACH_MT* Kconfig symbols are currently used in
> > linux-next. I assume that patches that actually use them (either as a
> > Kconfig symbol or as a CONFIG_* macro) are still pending. Is that
> > correct?
> 
> Yes, it is used in patch 3 in this series[1], and is discussed in [2].
> 
> Joe.C
> 
> [1]
> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-January/318453.html

That only seems to add a user for MACH_MT8135, not for the other three
symbols. The other three symbols will be used too, won't they?

> [2]
> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-January/315616.html

(For the record, that is a message regarding v4 of this patch.)


Paul Bolle

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