Re: [PATCH 3/5] dt-bindings: mediatek: Add smi dts binding

From: Yong Wu <yong.wu@mediatek.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>, Joerg Roedel <joro@8bytes.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Robin Murphy <Robin.Murphy@arm.com>,
	Will Deacon <Will.Deacon@arm.com>,
	Daniel Kurtz <djkurtz@google.com>, Tomasz Figa <tfiga@google.com>,
	Lucas Stach <l.stach@pengutronix.de>,
	Catalin Marinas <Catalin.Marinas@arm.com>,
	"linux-mediatek@lists.infradead.org" 
	<linux-mediatek@lists.infradead.org>,
	Sasha Hauer <kernel@pengutronix.de>,
	"srv_heupstream@mediatek.com" <srv_heupstream@mediatek.com>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>, <yong.wu@mediatek.com>
Subject: Re: [PATCH 3/5] dt-bindings: mediatek: Add smi dts binding
Date: Mon, 9 Mar 2015 20:55:03 +0800	[thread overview]
Message-ID: <1425905703.13300.48.camel@mhfsdcap03> (raw)
In-Reply-To: <20150306111338.GD8700@leverpostej>

Dear Mark,
      Thanks very much for you suggestion.

On Fri, 2015-03-06 at 11:13 +0000, Mark Rutland wrote:
> On Fri, Mar 06, 2015 at 10:48:18AM +0000, yong.wu@mediatek.com wrote:
> > From: Yong Wu <yong.wu@mediatek.com>
> > 
> > This patch add smi binding document.
> 
> Please move binding documents to the start of the series. It makes
> things far easier to review.
> 
> > 
> > Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> > ---
> >  .../devicetree/bindings/soc/mediatek/mediatek,smi.txt   | 17 +++++++++++++++++
> >  1 file changed, 17 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/soc/mediatek/mediatek,smi.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/soc/mediatek/mediatek,smi.txt b/Documentation/devicetree/bindings/soc/mediatek/mediatek,smi.txt
> > new file mode 100644
> > index 0000000..0fc9d1a
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/soc/mediatek/mediatek,smi.txt
> > @@ -0,0 +1,17 @@
> > +SMI hardware block diagram please help check <bindings/iommu/mediatek,iommu.txt>
> > +
> > +Required properties:
> > +- compatible : must be "mediatek,mediatek,mt8173-smi-larb"
> 
> Double vendor prefix?
Yes. I will change this.
> 
> What does "larb" mean? It would be nice for the intorductory paragraph
> in this file to explain.
That is local arbiter. I will add a link like this, is it ok?

compatible : must be "mediatek,mt8173-smi-larb", about the "larb",
please check the <bindings/iommu/mediatek,iommu.txt>.

> 
> > +- reg : the register of each local arbiter
> > +- clocks : the clocks of each local arbiter
> > +- clock-name: larb_sub*(3 clockes at most)
> 
> The names required _must_ be specified here, or clock-names is
> pointless.
> 
> The clock names should be from the PoV of _this_ device (i.e. they
> should be the names of the inputs) not from the PoV of the provider
> (i.e. they should not be the names of the outputs from the provider).
    I use larb_sub0, larb_sub1,larb_sub2 for more easily to control the
clocks. if we use the PoV, We should list all the clocks name, it will
has a little code. Anyway I will change this in the next version.
> 
> Mark.
> 
> > +
> > +Example:
> > +	larb1:larb@16010000 {
> > +	        compatible = "mediatek,mt8173-smi-larb";
> > +		reg = <0 0x16010000 0 0x1000>;
> > +		clocks = <&mmsys MM_SMI_COMMON>,
> > +		        <&vdecsys VDEC_CKEN>,
> > +                        <&vdecsys VDEC_LARB_CKEN>;
> > +		clock-names = "larb_sub0", "larb_sub1", "larb_sub2";
> > +	};
> > -- 
> > 1.8.1.1.dirty
> > 
> > 