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Date:   Wed, 20 May 2020 12:52:58 -0500
From:   Dan Murphy <>
To:     Florian Fainelli <>,
        Andrew Lunn <>
CC:     <>, <>,
        <>, <>,
Subject: Re: [PATCH net-next v2 3/4] dt-bindings: net: Add RGMII internal
 delay for DP83869


On 5/20/20 12:45 PM, Florian Fainelli wrote:
> On 5/20/2020 10:20 AM, Dan Murphy wrote:
>> Andrew/Florian
>> On 5/20/20 11:43 AM, Andrew Lunn wrote:
>>>> I am interested in knowing where that is documented.  I want to RTM I
>>>> grepped for a few different words but came up empty
>>> Hi Dan
>>> It probably is not well documented, but one example would be
>>> Documentation/devicetree/bindings/net/ethernet-controller.yaml
>>> says:
>>>         # RX and TX delays are added by the MAC when required
>>>         - rgmii
>>>         # RGMII with internal RX and TX delays provided by the PHY,
>>>         # the MAC should not add the RX or TX delays in this case
>>>         - rgmii-id
>>>         # RGMII with internal RX delay provided by the PHY, the MAC
>>>         # should not add an RX delay in this case
>>>         - rgmii-rxid
>>>         # RGMII with internal TX delay provided by the PHY, the MAC
>>>         # should not add an TX delay in this case
>>>         Andrew
>> OKI I read that.  I also looked at a couple other drivers too.
>> I am wondering if rx-internal-delay and tx-internal-delay should become
>> a common property like tx/rx fifo-depth
>>> And properly document how to use it or at least the expectation on use.
> Yes they should, and they should have an unit associated with the name.

UGH I think I just got volunteered to do make them common.


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