linux-kernel - Re: [PATCH v3 3/3] MIPS: Ingenic: Refresh USB nodes to match driver changes.

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Date:   Sat, 16 Apr 2022 17:34:55 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Zhou Yanjie <zhouyanjie@...yeetech.com>
Cc:     gregkh@...uxfoundation.org, hminas@...opsys.com,
        robh+dt@...nel.org, krzk+dt@...nel.org, tsbogend@...ha.franken.de,
        linux-usb@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        dragancecavac@...oo.com, hns@...delico.com,
        dongsheng.qiu@...enic.com, aric.pzqi@...enic.com,
        rick.tyliu@...enic.com, sernia.zhou@...mail.com,
        zhenwenjin@...il.com, reimu@...omaker.com
Subject: Re: [PATCH v3 3/3] MIPS: Ingenic: Refresh USB nodes to match driver
 changes.

Hi Zhou,

Le sam., avril 16 2022 at 20:16:33 +0800, Zhou Yanjie 
<zhouyanjie@...yeetech.com> a écrit :
> Hi Paul,
> 
> On 2022/4/15 下午11:07, Paul Cercueil wrote:
>> Hi Zhou,
>> 
>> 
>> Le ven., avril 15 2022 at 03:25:37 +0800, 周琰杰 (Zhou Yanjie) 
>> <zhouyanjie@...yeetech.com> a écrit :
>>> Refresh USB nodes in the jz4780.dtsi, x1000.dtsi, and x1830.dtsi 
>>> files.
>>> 
>>> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@...yeetech.com>
>>> ---
>>> 
>>> Notes:
>>>     v3:
>>>     New patch.
>>> 
>>>  arch/mips/boot/dts/ingenic/jz4780.dtsi | 2 +-
>>>  arch/mips/boot/dts/ingenic/x1000.dtsi  | 2 +-
>>>  arch/mips/boot/dts/ingenic/x1830.dtsi  | 2 +-
>>>  3 files changed, 3 insertions(+), 3 deletions(-)
>>> 
>>> diff --git a/arch/mips/boot/dts/ingenic/jz4780.dtsi 
>>> b/arch/mips/boot/dts/ingenic/jz4780.dtsi
>>> index b998301..c182a65 100644
>>> --- a/arch/mips/boot/dts/ingenic/jz4780.dtsi
>>> +++ b/arch/mips/boot/dts/ingenic/jz4780.dtsi
>>> @@ -577,7 +577,7 @@
>>>      };
>>> 
>>>      otg: usb@...00000 {
>>> -        compatible = "ingenic,jz4780-otg", "snps,dwc2";
>>> +        compatible = "ingenic,jz4780-otg";
>> 
>> Could you refresh my memory - why are the "snps,dwc2" fallback 
>> strings removed?
>> 
>> To me it seems like they should be here, since the OTG IP in Ingenic 
>> SoCs is derived from the DWC2 IP.
> 
> 
> The reason is that Nikolaus found that the current jz4780.dtsi will 
> cause
> dtbscheck to complain. After discussion, Nikolaus concluded three 
> feasible
> solutions, see here:
> https://lkml.org/lkml/2022/4/13/1097
> 
> And it seems that Krzysztof prefers the c) option.

Understood.

-Paul

> 
> Thanks and best regards!
> 
> 
>> 
>> Cheers,
>> -Paul
>> 
>>>          reg = <0x13500000 0x40000>;
>>> 
>>>          interrupt-parent = <&intc>;
>>> diff --git a/arch/mips/boot/dts/ingenic/x1000.dtsi 
>>> b/arch/mips/boot/dts/ingenic/x1000.dtsi
>>> index 8bd27ede..343818a2 100644
>>> --- a/arch/mips/boot/dts/ingenic/x1000.dtsi
>>> +++ b/arch/mips/boot/dts/ingenic/x1000.dtsi
>>> @@ -366,7 +366,7 @@
>>>      };
>>> 
>>>      otg: usb@...00000 {
>>> -        compatible = "ingenic,x1000-otg", "snps,dwc2";
>>> +        compatible = "ingenic,x1000-otg";
>>>          reg = <0x13500000 0x40000>;
>>> 
>>>          interrupt-parent = <&intc>;
>>> diff --git a/arch/mips/boot/dts/ingenic/x1830.dtsi 
>>> b/arch/mips/boot/dts/ingenic/x1830.dtsi
>>> index 2595df8..6aff19f 100644
>>> --- a/arch/mips/boot/dts/ingenic/x1830.dtsi
>>> +++ b/arch/mips/boot/dts/ingenic/x1830.dtsi
>>> @@ -355,7 +355,7 @@
>>>      };
>>> 
>>>      otg: usb@...00000 {
>>> -        compatible = "ingenic,x1830-otg", "snps,dwc2";
>>> +        compatible = "ingenic,x1830-otg";
>>>          reg = <0x13500000 0x40000>;
>>> 
>>>          interrupt-parent = <&intc>;
>>> --
>>> 2.7.4
>>> 
>>