linux-kernel - Re: [PATCH v2 1/3] dt-bindings: PCI: Extend max-link-speed to support PCIe Gen5/Gen6

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Message-ID: <21c6164e-fa2e-4207-910f-1db3ac3df545@163.com>
Date: Sat, 28 Jun 2025 23:40:55 +0800
From: Hans Zhang <18255117159@....com>
To: Manivannan Sadhasivam <mani@...nel.org>, Rob Herring <robh@...nel.org>
Cc: bhelgaas@...gle.com, lpieralisi@...nel.org, kw@...ux.com,
 krzk+dt@...nel.org, manivannan.sadhasivam@...aro.org, conor+dt@...nel.org,
 linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/3] dt-bindings: PCI: Extend max-link-speed to support
 PCIe Gen5/Gen6



On 2025/6/18 22:22, Hans Zhang wrote:
> 
> 
> On 2025/6/18 00:45, Manivannan Sadhasivam wrote:
>> On Thu, May 29, 2025 at 10:10:24AM +0800, Hans Zhang wrote:
>>> Update the device tree binding documentation for PCI to include
>>> PCIe Gen5 and Gen6 support in the `max-link-speed` property.
>>> The original documentation limited the value to 1~4 (Gen1~Gen4),
>>> but the kernel now supports up to Gen6. This change ensures the
>>> documentation aligns with the actual code implementation.
>>>
>>> Signed-off-by: Hans Zhang <18255117159@....com>
>>> ---
>>>   dtschema/schemas/pci/pci-bus-common.yaml | 2 +-
>>
>> As Rob commented in v1, this file lives in dtschema project. So update 
>> it there:
>> https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/pci/pci-bus-common.yaml
>>
> 
> Dear Mani,
> 
> I made the patch based on the latest dtschema code pulled from github.
> 
> Also, I saw similar submissions as follows:
> https://lore.kernel.org/linux-pci/advhonmqnxm4s6r3cl7ll5y3jfc566fcjvetvlzvy7bztzetev@t75xmo5fktde/
> 
> I don't know if Rob obtained this patch from here and then applied it to 
> the dtschema project? Is there still a special process to submit this 
> patch?
> 
> 
> Dear Rob,
> 
> Can you apply this patch directly to the dtschema project?
> 

Dear Rob,

Gentle ping.

Best regards,
Hans

> Best regards,
> Hans
> 
>> - Mani
>>
>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/dtschema/schemas/pci/pci-bus-common.yaml 
>>> b/dtschema/schemas/pci/pci-bus-common.yaml
>>> index ca97a00..413ef05 100644
>>> --- a/dtschema/schemas/pci/pci-bus-common.yaml
>>> +++ b/dtschema/schemas/pci/pci-bus-common.yaml
>>> @@ -121,7 +121,7 @@ properties:
>>>         unnecessary operation for unsupported link speed, for 
>>> instance, trying to
>>>         do training for unsupported link speed, etc.
>>>       $ref: /schemas/types.yaml#/definitions/uint32
>>> -    enum: [ 1, 2, 3, 4 ]
>>> +    enum: [ 1, 2, 3, 4, 5, 6 ]
>>>     num-lanes:
>>>       description: The number of PCIe lanes
>>> -- 
>>> 2.25.1
>>>
>>