linux-kernel - Re: [PATCH next 11/15] arm64: dts: mediatek: mt7622: harmonize node names and compatibles

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Date:   Tue, 19 Jan 2021 10:45:42 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Sergei Shtylyov <sergei.shtylyov@...il.com>
CC:     Vinod Koul <vkoul@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Min Guo <min.guo@...iatek.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-usb@...r.kernel.org>
Subject: Re: [PATCH next 11/15] arm64: dts: mediatek: mt7622: harmonize node
 names and compatibles

On Sat, 2021-01-16 at 12:36 +0300, Sergei Shtylyov wrote:
> Hello!
> 
> On 16.01.2021 12:06, Chunfeng Yun wrote:
> 
> > This is used to fix dtbs_check warning
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> >   arch/arm64/boot/dts/mediatek/mt7622.dtsi | 9 +++++----
> >   1 file changed, 5 insertions(+), 4 deletions(-)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt7622.dtsi b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
> > index 5b9ec032ce8d..4cfa09b0ca3c 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
> > @@ -740,8 +740,8 @@
> >   		status = "disabled";
> >   	};
> >   
> > -	u3phy: usb-phy@...c4000 {
> > -		compatible = "mediatek,mt7622-u3phy",
> > +	u3phy: t-phy@...c4000 {
> 
>     What is "t-phy"? Perhaps you should have used just "phy" here...
At first I use "phy", but it causes dt_binding_check fail:
"'#phy-cells' is a required property"

Due to we only need add '#phy-cells' for each subnode (usb-phy, pcie-phy
or sata-phy), but not for parent one, I change the parent node name as
"t-phy" which is a glue layer node, not a real phy.
I also prefer to "phy", but seems dt_binding_check can't distinguish
this case.

Thanks

> 
> > +		compatible = "mediatek,mt7622-tphy",
> >   			     "mediatek,generic-tphy-v1";
> >   		reg = <0 0x1a0c4000 0 0x700>;
> >   		#address-cells = <2>;
> > @@ -875,8 +875,9 @@
> >   		status = "disabled";
> >   	};
> >   
> > -	sata_phy: sata-phy@...43000 {
> > -		compatible = "mediatek,generic-tphy-v1";
> > +	sata_phy: t-phy@...43000 {
> 
>     Same here...
> 
> > +		compatible = "mediatek,mt7622-tphy",
> > +			     "mediatek,generic-tphy-v1";
> >   		#address-cells = <2>;
> >   		#size-cells = <2>;
> >   		ranges;
> 
> MBR, Sergei