linux-kernel - Re: [RFC V2 08/11] dt-bindings: interconnect: add MT8183 interconnect dt-bindings

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Message-ID: <1566178794.6371.8.camel@mtksdaap41>
Date:   Mon, 19 Aug 2019 09:39:54 +0800
From:   Henry Chen <henryc.chen@...iatek.com>
To:     Rob Herring <robh@...nel.org>
CC:     Georgi Djakov <georgi.djakov@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Nicolas Boichat <drinkcat@...gle.com>,
        Fan Chen <fan.chen@...iatek.com>,
        James Liao <jamesjj.liao@...iatek.com>,
        Weiyi Lu <weiyi.lu@...iatek.com>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [RFC V2 08/11] dt-bindings: interconnect: add MT8183
 interconnect dt-bindings

Hi Rob,

Sorry for late reply.

On Wed, 2019-05-01 at 15:27 -0500, Rob Herring wrote:
> On Tue, Apr 30, 2019 at 04:51:02PM +0800, Henry Chen wrote:
> > Add interconnect provider dt-bindings for MT8183.
> > 
> > Signed-off-by: Henry Chen <henryc.chen@...iatek.com>
> > ---
> >  .../bindings/interconnect/mtk,mt8183.txt           | 24 ++++++++++++++++++++++
> >  1 file changed, 24 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/interconnect/mtk,mt8183.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/interconnect/mtk,mt8183.txt b/Documentation/devicetree/bindings/interconnect/mtk,mt8183.txt
> > new file mode 100644
> > index 0000000..1cf1841
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/interconnect/mtk,mt8183.txt
> > @@ -0,0 +1,24 @@
> > +Mediatek MT8183 interconnect binding
> 
> This should be part of the dvfsrc binding.
ok, will add these into dvfsrc binding.
> 
> > +
> > +MT8183 interconnect providers support dram bandwidth requirements. The provider
> > +is able to communicate with the DVFSRC and send the dram bandwidth to it.
> > +Provider nodes must reside within an DVFSRC device node.
> > +
> > +Required properties :
> > +- compatible : shall contain only one of the following:
> > +			"mediatek,mt8183-emi-icc"
> > +- #interconnect-cells : should contain 1
> > +
> > +Examples:
> > +
> > +dvfsrc@...12000 {
> > +	compatible = "mediatek,mt8183-dvfsrc";
> > +	reg = <0 0x10012000 0 0x1000>;
> > +	clocks = <&infracfg CLK_INFRA_DVFSRC>;
> > +	clock-names = "dvfsrc";
> > +	ddr_emi: interconnect {
> > +		compatible = "mediatek,mt8183-emi-icc";
> > +		#interconnect-cells = <1>;
> 
> No need for a child node here. Just move #interconnect-cells to the 
> parent.
Ihave tried and it cannot work if move "#interconnect-cells" to the
parent.
The provider nodes must reside within an DVFSRC device node.
> 
> Rob