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Message-ID: <491f1a89-aabd-4c38-b33a-a298add1bdb3@collabora.com>
Date: Fri, 15 Dec 2023 22:56:54 +0200
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Subject: Re: [PATCH v3 2/9] dt-bindings: net: starfive,jh7110-dwmac: Add
 JH7100 SoC compatible
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To: Jessica Clarke <jrtc27@jrtc27.com>
Cc: "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>,
 Hal Feng <hal.feng@starfivetech.com>,
 Michael Turquette <mturquette@baylibre.com>, Stephen Boyd
 <sboyd@kernel.org>, 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>, netdev@vger.kernel.org,
 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
 <devicetree@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
 linux-riscv <linux-riscv@lists.infradead.org>, linux-clk@vger.kernel.org,
 linux-stm32@st-md-mailman.stormreply.com,
 linux-arm-kernel@lists.infradead.org, kernel@collabora.com
References: <20231215204050.2296404-1-cristian.ciocaltea@collabora.com>
 <20231215204050.2296404-3-cristian.ciocaltea@collabora.com>
 <A7C96942-07CB-40FD-AAAA-4A8947DEE7CA@jrtc27.com>
From: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
In-Reply-To: <A7C96942-07CB-40FD-AAAA-4A8947DEE7CA@jrtc27.com>
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On 12/15/23 22:47, Jessica Clarke wrote:
> On 15 Dec 2023, at 20:40, Cristian Ciocaltea <cristian.ciocaltea@collabora.com> wrote:
>>
>> The Synopsys DesignWare MAC found on StarFive JH7100 SoC is mostly
>> similar to the newer JH7110, but it requires only two interrupts and a
>> single reset line, which is 'ahb' instead of the commonly used
>> 'stmmaceth'.
>>
>> Since the common binding 'snps,dwmac' allows selecting 'ahb' only in
>> conjunction with 'stmmaceth', extend the logic to also permit exclusive
>> usage of the 'ahb' reset name.  This ensures the following use cases are
>> supported:
>>
>>  JH7110: reset-names = "stmmaceth", "ahb";
>>  JH7100: reset-names = "ahb";
>>  other:  reset-names = "stmmaceth";
>>
>> Also note the need to use a different dwmac fallback, as v5.20 applies
>> to JH7110 only, while JH7100 relies on v3.7x.
>>
>> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
>> ---
>> .../devicetree/bindings/net/snps,dwmac.yaml   |  3 +-
>> .../bindings/net/starfive,jh7110-dwmac.yaml   | 74 +++++++++++++------
>> 2 files changed, 55 insertions(+), 22 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> index 5c2769dc689a..c1380ff1c054 100644
>> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> @@ -95,6 +95,7 @@ properties:
>>         - snps,dwmac-5.20
>>         - snps,dwxgmac
>>         - snps,dwxgmac-2.10
>> +        - starfive,jh7100-dwmac
>>         - starfive,jh7110-dwmac
>>
>>   reg:
>> @@ -146,7 +147,7 @@ properties:
>>   reset-names:
>>     minItems: 1
>>     items:
>> -      - const: stmmaceth
>> +      - enum: [stmmaceth, ahb]
>>       - const: ahb
> 
> I’m not so well-versed in the YAML bindings, but would this not allow
> reset-names = "ahb", "ahb"?

Yes, as I already pointed out in [1], I wasn't able to come up with a
proper solution to avoid that.

Thanks,
Cristian

> Jess
>