linux-kernel - Re: [PATCH 2/3] arm64: dts: ti: k3-j722s: Redefine USB1 node description

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Date: Wed, 8 May 2024 15:08:20 +0530
From: Ravi Gunasekaran <r-gunasekaran@...com>
To: Andrew Davis <afd@...com>, <nm@...com>, <vigneshr@...com>
CC: <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <srk@...com>, <rogerq@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Ravi Gunasekaran <r-gunasekaran@...com>
Subject: Re: [PATCH 2/3] arm64: dts: ti: k3-j722s: Redefine USB1 node
 description



On 5/7/24 10:45 PM, Andrew Davis wrote:
> On 4/29/24 7:09 AM, Ravi Gunasekaran wrote:
>> 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>
>> ---
>>   arch/arm64/boot/dts/ti/k3-j722s.dtsi | 39 ++++++++++++++++++++++++++++
>>   1 file changed, 39 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-j722s.dtsi b/arch/arm64/boot/dts/ti/k3-j722s.dtsi
>> index beba5a3ea6cc..90725eeb3178 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j722s.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-j722s.dtsi
>> @@ -13,6 +13,13 @@
>>     #include "k3-am62p5.dtsi"
>>   +/*
>> + * USB1 controller on AM62P and J722S are of different IP.
>> + * Delete AM62P's USBSS1 node definition and redefine it for J722S.
>> + */
>> +
>> +/delete-node/ &usbss1;
>> +
>>   / {
>>       model = "Texas Instruments K3 J722S SoC";
>>       compatible = "ti,j722s";
>> @@ -120,6 +127,38 @@
>>               status = "disabled"; /* Needs lane config */
>>           };
>>       };
>> +
>> +    usbss1: cdns-usb@...0000 {
> 
> MAIN domain items are defined in -main.dtsi files, for instance the
> USB node you are overriding was defined in k3-am62p-main.dtsi.
> This should go in a file named k3-j722s-main.dtsi.
> 
> Andrew
> 

Ok. I will introduce k3-j722s-main.dtsi newly and define the USB 
and SerDes nodes there. 

[...]

-- 
Regards,
Ravi