linux-kernel - Re: [PATCH v6 15/16] dt-bindings: imx6q-pcie: Add iMX95 pcie endpoint compatible string

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Date: Tue, 26 Dec 2023 20:01:53 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Frank Li <Frank.li@....com>
Cc: bhelgaas@...gle.com, conor+dt@...nel.org, devicetree@...r.kernel.org,
 festevam@...il.com, helgaas@...nel.org, hongxing.zhu@....com,
 imx@...ts.linux.dev, kernel@...gutronix.de,
 krzysztof.kozlowski+dt@...aro.org, kw@...ux.com, l.stach@...gutronix.de,
 linux-arm-kernel@...ts.infradead.org, linux-imx@....com,
 linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
 lpieralisi@...nel.org, manivannan.sadhasivam@...aro.org, robh@...nel.org,
 s.hauer@...gutronix.de, shawnguo@...nel.org
Subject: Re: [PATCH v6 15/16] dt-bindings: imx6q-pcie: Add iMX95 pcie endpoint
 compatible string

On 26/12/2023 17:12, Frank Li wrote:
> On Mon, Dec 25, 2023 at 08:16:17PM +0100, Krzysztof Kozlowski wrote:
>> On 24/12/2023 19:32, Frank Li wrote:
>>> Add i.MX95 PCIe "fsl,imx95-pcie-ep" compatible string.
>>> Add reg-name: "atu", "dbi2", "dma" and "app".
>>> Reuse PCI linux,pci-domain as controller id at endpoint.
>>>
>>> Signed-off-by: Frank Li <Frank.Li@....com>
>>> ---
>>>
>>
>> ...
>>
>>> +# reuse PCI linux,pci-domain as controller id at Endpoint
>>> +  - if:
>>> +      properties:
>>> +        compatible:
>>> +          enum:
>>> +            - fsl,imx95-pcie-ep
>>> +    then:
>>> +      properties:
>>> +        linux,pci-domain: true
>>
>> Same comment: why do you need? Don't ignore my feedback. You responded
>> you will fix it, but it is still here...
> 
> DTB_CHECK report error after I remove it. linux,pci-domain is only define
> in pci, not pci-ep.

Ah, thank you, indeed.

> 
> So I add comments about this. linux,pci-domain was resued ad controller id.

However maybe there is reason why it is not for endpoints. The
description is saying it is valid only for host bridge, so maybe it
should not be used for endpoint case?
> 
> If include pci.yaml, there are too much other properties was involved, but
> not used by pci-ep.

Best regards,
Krzysztof