linux-kernel - Re: [PATCH 1/8] dt-bindings: interconnect: imx8m: Add bindings for imx8mp noc

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Date:   Wed, 1 Jun 2022 14:13:51 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Peng Fan <peng.fan@....com>,
        "Peng Fan (OSS)" <peng.fan@....nxp.com>,
        "djakov@...nel.org" <djakov@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>, Abel Vesa <abel.vesa@....com>,
        "abailon@...libre.com" <abailon@...libre.com>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
        "laurent.pinchart@...asonboard.com" 
        <laurent.pinchart@...asonboard.com>,
        "marex@...x.de" <marex@...x.de>,
        "paul.elder@...asonboard.com" <paul.elder@...asonboard.com>,
        "Markus.Niebel@...tq-group.com" <Markus.Niebel@...tq-group.com>,
        "aford173@...il.com" <aford173@...il.com>
Cc:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH 1/8] dt-bindings: interconnect: imx8m: Add bindings for
 imx8mp noc

On 01/06/2022 14:06, Peng Fan wrote:
>> Subject: Re: [PATCH 1/8] dt-bindings: interconnect: imx8m: Add bindings for
>> imx8mp noc
>>
>> On 01/06/2022 11:41, Peng Fan (OSS) wrote:
>>> From: Peng Fan <peng.fan@....com>
>>>
>>> i.MX8MP features same NoC/NIC as i.MX8MM/N/Q, and use two compatible
>>> strings.
>>>
>>> Signed-off-by: Peng Fan <peng.fan@....com>
>>> ---
>>>  .../devicetree/bindings/interconnect/fsl,imx8m-noc.yaml     | 6 ++++++
>>>  1 file changed, 6 insertions(+)
>>>
>>> diff --git
>>> a/Documentation/devicetree/bindings/interconnect/fsl,imx8m-noc.yaml
>>> b/Documentation/devicetree/bindings/interconnect/fsl,imx8m-noc.yaml
>>> index b8204ed22dd5..0923cd28d6c6 100644
>>> ---
>>> a/Documentation/devicetree/bindings/interconnect/fsl,imx8m-noc.yaml
>>> +++ b/Documentation/devicetree/bindings/interconnect/fsl,imx8m-noc.yam
>>> +++ l
>>> @@ -26,16 +26,22 @@ properties:
>>>      oneOf:
>>>        - items:
>>>            - enum:
>>> +              - fsl,imx8mp-nic
>>
>> Please order the entries alphabetically, so 8mp goes after 8mm.
>>
>>>                - fsl,imx8mn-nic
>>>                - fsl,imx8mm-nic
>>>                - fsl,imx8mq-nic
>>>            - const: fsl,imx8m-nic
>>>        - items:
>>>            - enum:
>>> +              - fsl,imx8mp-noc
>>
>> ditto
>>
>>>                - fsl,imx8mn-noc
>>>                - fsl,imx8mm-noc
>>>                - fsl,imx8mq-noc
>>>            - const: fsl,imx8m-noc
>>> +      - items:
>>> +          - const: fsl,imx8mp-noc
>>> +          - const: fsl,imx8m-noc
>>> +          - const: syscon
>>
>> This is a bit confusing - why this is also fallbacked as syscon?
> 
> I thought to give some flexibility for drivers to access the
> address through syscon. But it could be removed, I could
> fix in V2.

Please remove, unless you really need it. No one should poke someone's
else registers in general :)


Best regards,
Krzysztof