netdev - Re: [PATCH 1/3] dt-bindings: net: dp83826: add ti,cfg-dac-minus binding

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Message-ID: <d04ed7c7-32ee-4f8f-be20-6e3f89a2062f@leica-geosystems.com>
Date: Fri, 12 Jan 2024 11:02:29 +0000
From: POPESCU Catalin <catalin.popescu@...ca-geosystems.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	"davem@...emloft.net" <davem@...emloft.net>, "edumazet@...gle.com"
	<edumazet@...gle.com>, "kuba@...nel.org" <kuba@...nel.org>,
	"pabeni@...hat.com" <pabeni@...hat.com>, "robh+dt@...nel.org"
	<robh+dt@...nel.org>, "krzysztof.kozlowski+dt@...aro.org"
	<krzysztof.kozlowski+dt@...aro.org>, "conor+dt@...nel.org"
	<conor+dt@...nel.org>, "afd@...com" <afd@...com>, "andrew@...n.ch"
	<andrew@...n.ch>, "hkallweit1@...il.com" <hkallweit1@...il.com>,
	"linux@...linux.org.uk" <linux@...linux.org.uk>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] dt-bindings: net: dp83826: add ti,cfg-dac-minus
 binding

On 11.01.24 18:20, Krzysztof Kozlowski wrote:
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>
> On 11/01/2024 17:19, Catalin Popescu wrote:
>> Add property ti,cfg-dac-minus to allow for voltage tuning
>> of logical level -1 of the MLT-3 encoded data.
> A nit, subject: drop second/last, redundant "binding". 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
>> Signed-off-by: Catalin Popescu <catalin.popescu@...ca-geosystems.com>
>> ---
>>   Documentation/devicetree/bindings/net/ti,dp83822.yaml | 9 +++++++++
>>   1 file changed, 9 insertions(+)
> Don't add properties one by one. Especially if they are related.
OK
>
>> diff --git a/Documentation/devicetree/bindings/net/ti,dp83822.yaml b/Documentation/devicetree/bindings/net/ti,dp83822.yaml
>> index db74474207ed..2f010333be49 100644
>> --- a/Documentation/devicetree/bindings/net/ti,dp83822.yaml
>> +++ b/Documentation/devicetree/bindings/net/ti,dp83822.yaml
>> @@ -62,6 +62,15 @@ properties:
>>          for the PHY.  The internal delay for the PHY is fixed to 3.5ns relative
>>          to transmit data.
>>
>> +  ti,cfg-dac-minus:
>> +    description: |
>> +       DP83826 PHY only.
>> +       Sets the voltage ratio of the logical level -1 for the MLT-3 encoded data.
> ratio between what and what?
It's the ration b/w the actual output voltage of AOI and the spec
reference (the datasheet is not very clear).
>
>> +       0 = 50%, 1 = 56.25%, 2 = 62.50%, 3 = 68.75%, 4 = 75%, 5 = 81.25%, 6 = 87.50%,
>> +       7 = 93.75%, 8 = 100%, 9 = 106.25%, 10 = 112.50%, 11 = 118.75%, 12 = 125%,
>> +       13 = 131.25%, 14 = 137.50%, 15 = 143.75%, 16 = 150%.
>> +    enum: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]
> Missing: "default:"
>
>
> Best regards,
> Krzysztof
>