linux-kernel - Re: [PATCH V3 08/10] dt-bindings: interconnect: add MT8183 interconnect dt-bindings

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Message-ID: <1567514210.31403.8.camel@mtksdaap41>
Date:   Tue, 3 Sep 2019 20:36:50 +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>,
        Ryan Case <ryandcase@...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: [PATCH V3 08/10] dt-bindings: interconnect: add MT8183
 interconnect dt-bindings

On Mon, 2019-09-02 at 14:38 +0100, Rob Herring wrote:
Hi Rob,
> On Wed, Aug 28, 2019 at 08:28:46PM +0800, Henry Chen wrote:
> > Add interconnect provider dt-bindings for MT8183.
> > 
> > Signed-off-by: Henry Chen <henryc.chen@...iatek.com>
> > ---
> >  .../devicetree/bindings/soc/mediatek/dvfsrc.txt        |  9 +++++++++
> >  include/dt-bindings/interconnect/mtk,mt8183-emi.h      | 18 ++++++++++++++++++
> >  2 files changed, 27 insertions(+)
> >  create mode 100644 include/dt-bindings/interconnect/mtk,mt8183-emi.h
> > 
> > diff --git a/Documentation/devicetree/bindings/soc/mediatek/dvfsrc.txt b/Documentation/devicetree/bindings/soc/mediatek/dvfsrc.txt
> > index 7f43499..da98ec9 100644
> > --- a/Documentation/devicetree/bindings/soc/mediatek/dvfsrc.txt
> > +++ b/Documentation/devicetree/bindings/soc/mediatek/dvfsrc.txt
> > @@ -12,6 +12,11 @@ Required Properties:
> >  - clock-names: Must include the following entries:
> >  	"dvfsrc": DVFSRC module clock
> >  - clocks: Must contain an entry for each entry in clock-names.
> > +- #interconnect-cells : should contain 1
> > +- interconnect : interconnect providers support dram bandwidth requirements.
> > +	The provider is able to communicate with the DVFSRC and send the dram
> > +	bandwidth to it. shall contain only one of the following:
> > +	"mediatek,mt8183-emi"
> >  
> >  Example:
> >  
> > @@ -20,4 +25,8 @@ Example:
> >  		reg = <0 0x10012000 0 0x1000>;
> >  		clocks = <&infracfg CLK_INFRA_DVFSRC>;
> >  		clock-names = "dvfsrc";
> > +		ddr_emi: interconnect {
> 
> The EMI is a sub-module in the DVFSRC? This is the DDR controller or 
> something else?
Yes, EMI is a sub-module in the DVFSRC, the EMI through interconnect
framework to collect DRAM bandwidth from other device drivers and will
send the bandwidth result to DVFSRC driver.
> 
> 
> > +			compatible = "mediatek,mt8183-emi";
> > +			#interconnect-cells = <1>;
> > +		};
> >  	};
>