linux-kernel - Re: [PATCH 1/2] arm64: dts: imx8mm: Add SAI nodes

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Date:   Mon, 22 Apr 2019 09:51:37 +0300
From:   Daniel Baluta <daniel.baluta@...il.com>
To:     Shawn Guo <shawnguo@...nel.org>
Cc:     Daniel Baluta <daniel.baluta@....com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        Anson Huang <anson.huang@....com>, Peng Fan <peng.fan@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "S.j. Wang" <shengjiu.wang@....com>, Jacky Bai <ping.bai@....com>
Subject: Re: [PATCH 1/2] arm64: dts: imx8mm: Add SAI nodes

On Mon, Apr 22, 2019 at 5:45 AM Shawn Guo <shawnguo@...nel.org> wrote:
>
> On Fri, Apr 19, 2019 at 08:20:39PM +0000, Daniel Baluta wrote:
> > i.MX8MM has 5 SAI instances with the following base
> > addresses according to RM.
> >
> > SAI1 base address: 3001_0000h
> > SAI2 base address: 3002_0000h
> > SAI3 base address: 3003_0000h
> > SAI5 base address: 3005_0000h
> > SAI6 base address: 3006_0000h
> >
> > Signed-off-by: Bai Ping <ping.bai@....com>
> > Signed-off-by: Daniel Baluta <daniel.baluta@....com>
> > ---
> >  arch/arm64/boot/dts/freescale/imx8mm.dtsi | 68 +++++++++++++++++++++++
> >  1 file changed, 68 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > index de3498c2dd44..e9a0b2b6063a 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > @@ -171,6 +171,74 @@
> >                       #size-cells = <1>;
> >                       ranges;
> >
> > +                     sai1: sai@...10000 {
> > +                             compatible = "fsl,imx8mq-sai",
>
> Should be "fsl,imx8mm-sai"?

SAI IP on imx8mm is identical with the one on imx8mq. There is no need
to differentiate with a compatible string.

What is the common practice for such cases?