linux-kernel - Re: [PATCH v3 2/7] arm64: dts: ti: k3-j722s-main: Redefine USB1 node description

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Date: Tue, 28 May 2024 18:07:43 +0530
From: Siddharth Vadapalli <s-vadapalli@...com>
To: Roger Quadros <rogerq@...nel.org>
CC: Siddharth Vadapalli <s-vadapalli@...com>, <nm@...com>, <vigneshr@...com>,
        <afd@...com>, <kristo@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <u-kumar1@...com>,
        <danishanwar@...com>, <srk@...com>
Subject: Re: [PATCH v3 2/7] arm64: dts: ti: k3-j722s-main: Redefine USB1 node
 description

On Tue, May 28, 2024 at 03:15:53PM +0300, Roger Quadros wrote:
> 
> 
> On 24/05/2024 12:05, Siddharth Vadapalli wrote:
> > From: Ravi Gunasekaran <r-gunasekaran@...com>
> > 
> > USB1 controller on J722S and AM62P are from different vendors.
> > Redefine the USB1 node description for J722S by deleting the
> > node inherited from AM62P dtsi.
> > 
> > Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
> > Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
> > ---
> > v2:
> > https://lore.kernel.org/r/20240513114443.16350-3-r-gunasekaran@ti.com/
> > No changes since v2.
> > 
> > v1:
> > https://lore.kernel.org/r/20240429120932.11456-3-r-gunasekaran@ti.com/
> > Changes since v1:
> > - The entire node which was added in k3-j722s.dtsi in v1 in now moved to
> >   k3-j722s-main.dtsi as USB is a main domain peripheral.
> > - Used generic node names - renamed "cdns-usb@...0000" to "usb@...0000".
> > 
> >  arch/arm64/boot/dts/ti/k3-j722s-main.dtsi | 39 +++++++++++++++++++++++
> >  1 file changed, 39 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi b/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi
> > index 0dac8f1e1291..b069cecebfd9 100644
> > --- a/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi
> > +++ b/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi
> > @@ -6,6 +6,13 @@
> >  
> >  #include <dt-bindings/phy/phy-ti.h>
> >  
> > +/*
> > + * USB1 controller on AM62P and J722S are of different IP.
> > + * Delete AM62P's USBSS1 node definition and redefine it for J722S.
> > + */
> > +
> > +/delete-node/ &usbss1;
> > +
> 
> This is odd and indicates issues with current DT file inclusion.
> We need to split out the non common IPs (e.g. USB) out of the common k3-am62p-main.dtsi file Maybe call it k3-am62-main-common.dtsi.
> Only keep am62p specific stuff in k3-am62p-main.dtsi.
> 
> Include k3-am62-main-common.dtsi and k3-am62p-main.dtsi for AM62P
> Include k3-am62-main-common.dtsi and k3-j722s-main.dtsi for J722S
> 
> This way you don't need to call /delete-node/

Ok. I will move the common nodes between k3-am62p-main.dtsi and
k3-j722s-main.dtsi to "k3-am62p-j722s-common.dtsi".

Regards,
Siddharth.