Re: [PATCH v3 1/2] dt-bindings: usb: Add Parade PS5169 redriver bindings

[Esteban Urrutia]

On 8/11/26 5:11 AM, Krzysztof Kozlowski wrote:
> On Mon, Aug 10, 2026 at 11:31:36PM -0400, Esteban Urrutia wrote:
> 
> A nit, subject: drop second/last, redundant "bindings". The
> "dt-bindings" prefix is already stating that these are bindings.
> See also:
> https://elixir.bootlin.com/linux/v7.1-rc7/source/Documentation/devicetree/bindings/submitting-patches.rst#L23

Okay, will change that.

>> +
>> +  parade,dp-eq-db:
>> +    description:
>> +      Equalization for DP channels.
>> +      For example, <6 5> denotes an equalization of 6.5 dB.
>> +    oneOf:
>> +      - items:
>> +          - enum: [ 2, 8, 10 ]
>> +          - const: 0
>> +      - items:
>> +          - enum: [ 5, 6, 7, 8, 9 ]
>> +          - const: 5
> 
> Eh, this is on me. I did not pay attention that values are fractional.
> You should not be a list, but expressed as a single value, which is not
> possible with int32. This might be the only ever practical use of mB :),
> but I doubt that any engineer would find that readable, so let's go to
> your previous code - direct register values - for all three properties.

-db$ specifies an int32-array type so it should allow for a list.
So I'm not certain what you mean.

> Sorry for the mess.

What I ended up with in here does indeed looks messy, so no worries.

>> +
>> +  parade,usb-rx-eq-db:
>> +    description:
>> +      Equalization for USB receive channels.
>> +      For example, <5 2> denotes an equalization of 5.2 dB.
>> +    oneOf:
>> +      - items:
>> +          - enum: [ 5, 11 ]
>> +          - const: 2
>> +      - items:
>> +          - enum: [ 6, 7, 8 ]
>> +          - const: 0
>> +      - items:
>> +          - const: 8
>> +          - const: 8
>> +      - items:
>> +          - const: 9
>> +          - const: 6
>> +      - items:
>> +          - const: 10
>> +          - const: 4
>> +
>> +  parade,usb-tx-eq-db:
>> +    description:
>> +      Equalization for USB transmit channels.
>> +      For example, <6 5> denotes an equalization of 6.5 dB.
>> +    oneOf:
>> +      - items:
>> +          - enum: [ 2, 8, 10 ]
>> +          - const: 0
>> +      - items:
>> +          - enum: [ 5, 6, 7, 8, 9 ]
>> +          - const: 5
> 
> Best regards,
> Krzysztof
>