linux-kernel - Re: [PATCH v1 4/5] dt-bindings: remoteproc: add binding for Microchip IPC remoteproc

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Message-ID: <f0da1029-c8df-40e7-8312-a41a87b7b940@kernel.org>
Date: Tue, 15 Oct 2024 15:35:46 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Valentina.FernandezAlanis@...rochip.com, paul.walmsley@...ive.com,
 palmer@...belt.com, aou@...s.berkeley.edu, peterlin@...estech.com,
 dminus@...estech.com, Conor.Dooley@...rochip.com, conor+dt@...nel.org,
 ycliang@...estech.com, jassisinghbrar@...il.com, robh@...nel.org,
 krzk+dt@...nel.org, andersson@...nel.org, mathieu.poirier@...aro.org
Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, linux-remoteproc@...r.kernel.org
Subject: Re: [PATCH v1 4/5] dt-bindings: remoteproc: add binding for Microchip
 IPC remoteproc

On 15/10/2024 14:09, Valentina.FernandezAlanis@...rochip.com wrote:
> On 16/09/2024 21:14, Krzysztof Kozlowski wrote:
>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>
>> On 12/09/2024 19:00, Valentina Fernandez wrote:
>>> Microchip family of RISC-V SoCs typically has or more clusters. These
>>> clusters can be configured to run in Asymmetric Multi Processing (AMP)
>>> mode
>>
>> A nit, subject: drop second/last, redundant "binding for". The
>> "dt-bindings" prefix is already stating that these are bindings.
>> See also:
>> https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18
>>
>>>
>>> Add a dt-binding for the Microchip IPC Remoteproc platform driver.
>>>
>>
>> Binding is for hardware, not driver. Please rephrase it to describe
>> hardware.
>>
>>
>>> Signed-off-by: Valentina Fernandez <valentina.fernandezalanis@...rochip.com>
>>> ---
>>>   .../remoteproc/microchip,ipc-remoteproc.yaml  | 84 +++++++++++++++++++
>>>   1 file changed, 84 insertions(+)
>>>   create mode 100644 Documentation/devicetree/bindings/remoteproc/microchip,ipc-remoteproc.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/remoteproc/microchip,ipc-remoteproc.yaml b/Documentation/devicetree/bindings/remoteproc/microchip,ipc-remoteproc.yaml
>>> new file mode 100644
>>> index 000000000000..1765c68d22cf
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/remoteproc/microchip,ipc-remoteproc.yaml
>>> @@ -0,0 +1,84 @@
>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/remoteproc/microchip,ipc-remoteproc.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Microchip IPC Remote Processor
>>> +
>>> +description:
>>> +  Microchip family of RISC-V SoCs typically have one or more
>>> +  clusters. These clusters can be configured to run in an Asymmetric
>>> +  Multi Processing (AMP) mode where clusters are split in independent
>>> +  software contexts.
>>> +
>>> +  This document defines the binding for the remoteproc component that
>>> +  loads and boots firmwares on remote clusters.
>>
>> Don't say that binding is a binding for. Say what this hardware piece is.
>>
>>> +
>>> +  This SBI interface is compatible with the Mi-V Inter-hart
>>> +  Communication (IHC) IP.
>>> +
>>> +maintainers:
>>> +  - Valentina Fernandez <valentina.fernandezalanis@...rochip.com>
>>> +
>>> +properties:
>>> +  compatible:
>>> +    const: microchip,ipc-remoteproc
>>
>> That's quite generic. Basically this says it will handle IPC of all
>> possible Microchip SoCs, not only RISC-V but also ARM and whatever you
>> come up with.
> IPC is the actual name of the hardware block described in this binding. 
> I'll update the description of the binding in v2 to mention this.
> 
> Additionally, I'll rename the compatible to microchip,ipc-sbi-remoteproc 
> to further clarify that this binding is intended for devices using the 
> Microchip IPC hardware block and for devices with an SBI interface (RISC-V).

Well, still generic. Explain why this deserves exception from specific
SoC compatibles.

Best regards,
Krzysztof