linux-kernel - Re: [PATCH v2 8/8] ARM: dts: mt8135: Add support for MT6397 regulator

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Message-ID: <20141201064011.GC30369@pengutronix.de>
Date:	Mon, 1 Dec 2014 07:40:11 +0100
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Flora Fu <flora.fu@...iatek.com>
Cc:	Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	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>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Sandeep Nair <sandeep_n@...com>,
	Andy Gross <agross@...eaurora.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Stephen Warren <swarren@...dia.com>,
	Thierry Reding <treding@...dia.com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Vladimir Murzin <vladimir.murzin@....com>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	"Joe.C" <yingjoe.chen@...iatek.com>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, srv_heupstream@...iatek.com,
	Sascha Hauer <kernel@...gutronix.de>,
	Eddie Huang <eddie.huang@...iatek.com>,
	Dongdong Cheng <dongdong.cheng@...iatek.com>
Subject: Re: [PATCH v2 8/8] ARM: dts: mt8135: Add support for MT6397 regulator

On Mon, Dec 01, 2014 at 11:19:25AM +0800, Flora Fu wrote:
> Hi, Mark, 
> 
> On Fri, 2014-11-28 at 15:30 +0000, Mark Brown wrote: 
> > On Fri, Nov 28, 2014 at 11:54:34AM +0800, Flora Fu wrote:
> > 
> > > Add device tree for MT6397 regulators in mt8135.dtsi.
> > > 
> > > Signed-off-by: Flora Fu <flora.fu@...iatek.com>
> > > ---
> > >  arch/arm/boot/dts/mt8135.dtsi | 192 ++++++++++++++++++++++++++++++++++++++++++
> > 
> > This appears to be the DT fragment for a SoC but you are defining the
> > system integration for the PMIC.  That's bad, the PMIC is a separate
> > device so should be hooked up by the board using it.  If there's common
> > elements from a reference design they should be in their own .dtsi.
> > 
> 
> Do you mean that we should add a mt6397.dtsi and include it from
> mt8135.dtsi? For board specific, update them in mt8135.dtsi?

You can't include it from mt8135.dtsi since here you don't know if a
mt6397.dtsi is connected. You have to include both the mt8135.dtsi and
the mt6397.dtsi from the board file.

Sascha

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