lkml.org 
[lkml]   [2024]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v2 1/2] dt-bindings: net: dp83826: support TX data voltage tuning
From
On 08/02/2024 09:48, POPESCU Catalin wrote:
> On 08.02.24 08:35, Krzysztof Kozlowski wrote:
>> [You don't often get email from krzysztof.kozlowski@linaro.org. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]
>>
>> This email is not from Hexagon’s Office 365 instance. Please be careful while clicking links, opening attachments, or replying to this email.
>>
>>
>> On 07/02/2024 18:58, Catalin Popescu wrote:
>>> Add properties ti,cfg-dac-minus-one-milli-percent and
>>> ti,cfg-dac-plus-one-milli-percent to support voltage tuning
>>> of logical levels -1/+1 of the MLT-3 encoded TX data.
>>>
>>> Signed-off-by: Catalin Popescu <catalin.popescu@leica-geosystems.com>
>>> ---
>>> Changes in v2:
>>> - squash the 2 DT bindings patches in one single patch
>>> - drop redundant "binding" from the DT bindings patch title
>>> - rename DT properties and define them as percentage
>>> - add default value for each new DT property
>>> ---
>>> .../devicetree/bindings/net/ti,dp83822.yaml | 18 ++++++++++++++++++
>>> 1 file changed, 18 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/net/ti,dp83822.yaml b/Documentation/devicetree/bindings/net/ti,dp83822.yaml
>>> index db74474207ed..6bbd465e51d6 100644
>>> --- a/Documentation/devicetree/bindings/net/ti,dp83822.yaml
>>> +++ b/Documentation/devicetree/bindings/net/ti,dp83822.yaml
>>> @@ -62,6 +62,24 @@ properties:
>>> for the PHY. The internal delay for the PHY is fixed to 3.5ns relative
>>> to transmit data.
>>>
>>> + ti,cfg-dac-minus-one-milli-percent:
>>> + description: |
>>> + DP83826 PHY only.
>>> + Sets the voltage ratio (with respect to the nominal value)
>>> + of the logical level -1 for the MLT-3 encoded TX data.
>>> + enum: [50000, 56250, 62500, 68750, 75000, 81250, 87500, 93750, 100000,
>>> + 106250, 112500, 118750, 125000, 131250, 137500, 143750, 150000]
>> I see all values being multiple of basis points, so why not using -bp
>> suffix?
>
> I can read :
>
>   "-bp$":
>     $ref: types.yaml#/definitions/int32-array
>     description: basis points (1/100 of a percent)
>
> In my case it's 1/1000 of a percent. As I'm not sure exactly what the
> author meant by "basis points", would this apply to my patch as well?

So please show me the value which does not fit in -bp.

Best regards,
Krzysztof


\
 
 \ /
  Last update: 2024-05-27 14:54    [W:0.925 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site