netdev - Re: [PATCH v2 01/12] dt-bindings: net: snps,dwmac: Allow exclusive usage of ahb reset

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Message-ID: <98d90ba9-7e69-4b54-830d-bdbc0e6c54fe@linaro.org>
Date: Mon, 30 Oct 2023 08:26:03 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Emil Renner Berthing <kernel@...il.dk>,
 Samin Guo <samin.guo@...rfivetech.com>,
 Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Jose Abreu <joabreu@...opsys.com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Richard Cochran <richardcochran@...il.com>,
 Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH v2 01/12] dt-bindings: net: snps,dwmac: Allow exclusive
 usage of ahb reset

On 29/10/2023 23:24, Cristian Ciocaltea wrote:
> On 10/29/23 13:25, Krzysztof Kozlowski wrote:
>> On 29/10/2023 05:27, Cristian Ciocaltea wrote:
>>> The Synopsys DesignWare MAC found on the StarFive JH7100 SoC requires
>>> just the 'ahb' reset name, but the binding allows selecting it only in
>>> conjunction with 'stmmaceth'.
>>>
>>> Fix the issue by permitting exclusive usage of the 'ahb' reset name.
>>>
>>> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
>>> ---
>>>  Documentation/devicetree/bindings/net/snps,dwmac.yaml | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>>> index 5c2769dc689a..a4d7172ea701 100644
>>> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>>> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>>> @@ -146,7 +146,7 @@ properties:
>>>    reset-names:
>>>      minItems: 1
>>>      items:
>>> -      - const: stmmaceth
>>> +      - enum: [stmmaceth, ahb]
>>
>> Also, this makes sense only with patch #4, so this should be squashed there.
> 
> I added this as a separate patch since it changes the generic schema
> which is included by many other bindings.  JH7100 just happens to be the
> first use-case requiring this update.  But I can squash the patch if
> that's not a good enough reason to keep it separately.

If there is no single user of this, why changing this? I would even
argue that it is not correct from existing bindings point of view -
nothing allows and uses ahb as the only reset. Even the commit msg
mentions your hardware from patch 4.

Best regards,
Krzysztof