linux-kernel - Re: [PATCH v12 2/4] dt-bindings: remoteproc: add Tightly Coupled Memory (TCM) bindings

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Date: Tue, 12 Mar 2024 13:10:02 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Tanmay Shah <tanmay.shah@....com>, andersson@...nel.org,
 mathieu.poirier@...aro.org, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 michal.simek@....com, ben.levinsky@....com
Cc: linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Radhey Shyam Pandey <radhey.shyam.pandey@....com>
Subject: Re: [PATCH v12 2/4] dt-bindings: remoteproc: add Tightly Coupled
 Memory (TCM) bindings

On 11/03/2024 17:27, Tanmay Shah wrote:
>>> +    then:
>>> +      patternProperties:
>>> +        "^r5f@[0-9a-f]+$":
>>> +          type: object
>>> +
>>> +          properties:
>>> +            reg:
>>> +              minItems: 1
>>> +              items:
>>> +                - description: ATCM internal memory
>>> +                - description: BTCM internal memory
>>> +                - description: extra ATCM memory in lockstep mode
>>> +                - description: extra BTCM memory in lockstep mode
>>> +
>>> +            reg-names:
>>> +              minItems: 1
>>> +              items:
>>> +                - const: atcm0
>>> +                - const: btcm0
>>> +                - const: atcm1
>>> +                - const: btcm1
>>
>> Why power domains are flexible?
> 
> User may not want to use all the TCMs. For example, if users want to turn-on only TCM-A and rest of them want to keep off, then
> 
> they can avoid having power-domains of other TCMs in the device-tree. This helps with less power-consumption when needed.
> 
> Hence flexible list of power-domains list.
> 

Isn't turning on/off driver's job? Sorry, but what is "user" here? DTS
describes bindings, not OS policy.

Also, please wrap your replies to match email style.

> I can certainly mention "items:" under power-domains property.
> 
> 
>>


Best regards,
Krzysztof