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

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Message-ID: <e9541a57-07de-456a-a12f-7f09482fbbc4@linaro.org>
Date: Wed, 27 Dec 2023 13:00:57 +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 22:53, Frank Li wrote:
>>> 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?
> 
> EP side, it is not PCI bus. So it is reasonable that linux,pci-doamin not
> in EP side.
> 
> iMX6 host driver(and other some host controller drivers) already use it as
> "controller id". EP driver is mostly reused with host bridge drivers. I
> think needn't create new property such as "controller_id" for EP only.
> 
> A comments should be enough for this case.

Hm, ok, seems fine for me. I don't know PCI good enough to judge, so
unless Rob or Conor say something else, it looks good.

Best regards,
Krzysztof