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@163.com>
---
 Documentation/devicetree/bindings/pci/pci.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/pci.txt b/Documentation/devicetree/bindings/pci/pci.txt
index 6a8f2874a24d..5ffd690e3fc7 100644
--- a/Documentation/devicetree/bindings/pci/pci.txt
+++ b/Documentation/devicetree/bindings/pci/pci.txt
@@ -22,8 +22,9 @@ driver implementation may support the following properties:
    If present this property specifies PCI gen for link capability.  Host
    drivers could add this as a strategy to avoid unnecessary operation for
    unsupported link speed, for instance, trying to do training for
-   unsupported link speed, etc.  Must be '4' for gen4, '3' for gen3, '2'
-   for gen2, and '1' for gen1. Any other values are invalid.
+   unsupported link speed, etc.  Must be '6' for gen6, '5' for gen5, '4' for
+   gen4, '3' for gen3, '2' for gen2, and '1' for gen1. Any other values are
+   invalid.
 - reset-gpios:
    If present this property specifies PERST# GPIO. Host drivers can parse the
    GPIO and apply fundamental reset to endpoints.
-- 
2.25.1

On Tue, May 20, 2025 at 12:04:46AM +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@163.com>
> ---
>  Documentation/devicetree/bindings/pci/pci.txt | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)

This file is now removed. Update the schema if you need to. It lives in 
dtschema project.

> 
> diff --git a/Documentation/devicetree/bindings/pci/pci.txt b/Documentation/devicetree/bindings/pci/pci.txt
> index 6a8f2874a24d..5ffd690e3fc7 100644
> --- a/Documentation/devicetree/bindings/pci/pci.txt
> +++ b/Documentation/devicetree/bindings/pci/pci.txt
> @@ -22,8 +22,9 @@ driver implementation may support the following properties:
>     If present this property specifies PCI gen for link capability.  Host
>     drivers could add this as a strategy to avoid unnecessary operation for
>     unsupported link speed, for instance, trying to do training for
> -   unsupported link speed, etc.  Must be '4' for gen4, '3' for gen3, '2'
> -   for gen2, and '1' for gen1. Any other values are invalid.
> +   unsupported link speed, etc.  Must be '6' for gen6, '5' for gen5, '4' for
> +   gen4, '3' for gen3, '2' for gen2, and '1' for gen1. Any other values are
> +   invalid.
>  - reset-gpios:
>     If present this property specifies PERST# GPIO. Host drivers can parse the
>     GPIO and apply fundamental reset to endpoints.
> -- 
> 2.25.1
>

On 2025/5/28 03:35, Rob Herring wrote:
> On Tue, May 20, 2025 at 12:04:46AM +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@163.com>
>> ---
>>   Documentation/devicetree/bindings/pci/pci.txt | 5 +++--
>>   1 file changed, 3 insertions(+), 2 deletions(-)
> 
> This file is now removed. Update the schema if you need to. It lives in
> dtschema project.
> 

Dear Rob,

Thank you very much for your reply and reminder. I will resubmit in the 
next version.

Best regards,
Hans

>>
>> diff --git a/Documentation/devicetree/bindings/pci/pci.txt b/Documentation/devicetree/bindings/pci/pci.txt
>> index 6a8f2874a24d..5ffd690e3fc7 100644
>> --- a/Documentation/devicetree/bindings/pci/pci.txt
>> +++ b/Documentation/devicetree/bindings/pci/pci.txt
>> @@ -22,8 +22,9 @@ driver implementation may support the following properties:
>>      If present this property specifies PCI gen for link capability.  Host
>>      drivers could add this as a strategy to avoid unnecessary operation for
>>      unsupported link speed, for instance, trying to do training for
>> -   unsupported link speed, etc.  Must be '4' for gen4, '3' for gen3, '2'
>> -   for gen2, and '1' for gen1. Any other values are invalid.
>> +   unsupported link speed, etc.  Must be '6' for gen6, '5' for gen5, '4' for
>> +   gen4, '3' for gen3, '2' for gen2, and '1' for gen1. Any other values are
>> +   invalid.
>>   - reset-gpios:
>>      If present this property specifies PERST# GPIO. Host drivers can parse the
>>      GPIO and apply fundamental reset to endpoints.
>> -- 
>> 2.25.1
>>