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Message-ID: <a06aaab5-b433-44a6-89a4-bdf713d5e1a9@collabora.com>
Date: Mon, 18 Dec 2023 13:38:10 +0200
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Subject: Re: [PATCH v2 12/12] [UNTESTED] riscv: dts: starfive:
 beaglev-starlight: Enable gmac
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To: Emil Renner Berthing <emil.renner.berthing@canonical.com>,
 "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>,
 Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
 Rob Herring <robh+dt@kernel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>, Emil Renner Berthing <kernel@esmil.dk>,
 Samin Guo <samin.guo@starfivetech.com>,
 Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt
 <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>,
 Alexandre Torgue <alexandre.torgue@foss.st.com>,
 Jose Abreu <joabreu@synopsys.com>,
 Maxime Coquelin <mcoquelin.stm32@gmail.com>,
 Richard Cochran <richardcochran@gmail.com>,
 Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org,
 linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
 linux-stm32@st-md-mailman.stormreply.com,
 linux-arm-kernel@lists.infradead.org, kernel@collabora.com
References: <20231029042712.520010-1-cristian.ciocaltea@collabora.com>
 <20231029042712.520010-13-cristian.ciocaltea@collabora.com>
 <CAJM55Z9e=vjGKNnmURN15mvXo2bVd3igBA-3puF9q7eh5hiP+A@mail.gmail.com>
 <2f06ce36-0dc1-495e-b6a6-318951a53e8d@collabora.com>
 <698fbb5d-0750-4f2a-857f-5429e5f589f9@collabora.com>
 <CAJM55Z-e8mkjac-nCF9_w6EmMVbL9ued0mAcjwTMF=pKDLkMsA@mail.gmail.com>
From: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
In-Reply-To: <CAJM55Z-e8mkjac-nCF9_w6EmMVbL9ued0mAcjwTMF=pKDLkMsA@mail.gmail.com>
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On 12/16/23 21:24, Emil Renner Berthing wrote:
> Cristian Ciocaltea wrote:
>> On 11/28/23 02:40, Cristian Ciocaltea wrote:
>>> On 11/26/23 23:10, Emil Renner Berthing wrote:
>>>> Cristian Ciocaltea wrote:
>>>>> The BeagleV Starlight SBC uses a Microchip KSZ9031RNXCA PHY supporting
>>>>> RGMII-ID.
>>>>>
>>
>> [...]
>>
>>>> You've alse removed the phy reset gpio on the Starlight board:
>>>>
>>>>   snps,reset-gpios = <&gpio 63 GPIO_ACTIVE_LOW>
>>>>
>>>> Why?
>>>
>>> I missed this in v1 as the gmac handling was done exclusively in
>>> jh7100-common. Thanks for noticing!
>>
>> Hi Emil,
>>
>> I think the reset doesn't actually trigger because "snps,reset-gpios" is
>> not a valid property, it should have been "snps,reset-gpio" (without the
>> trailing "s").
>>
>> However, this seems to be deprecated now, and the recommended approach
>> would be to define the reset gpio in the phy node, which I did in [1].
>>
>> Hopefully this won't cause any unexpected behaviour. Otherwise we should
>> probably simply drop it.
>>
>> [1]: https://lore.kernel.org/lkml/20231215204050.2296404-8-cristian.ciocaltea@collabora.com/
> 
> Oh, nice catch! With your v3 patches the Starlight board still works fine and
> GPIO63 is correctly grabbed and used for "PHY reset".

Great, thanks a lot for retesting this!