Messages in this thread | | | Date | Sun, 13 Jun 2021 16:34:52 +0800 | From | 周琰杰 <> | Subject | Re: [PATCH v2 2/2] net: stmmac: Add Ingenic SoCs MAC support. |
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于 Thu, 10 Jun 2021 16:57:29 +0200 Andrew Lunn <andrew@lunn.ch> 写道:
> > Here is Ingenic's reply, the time length corresponding to a unit is > > 19.5ps (19500fs). > > Sometimes, there is a negative offset in the delays. So a delay value > of 0 written to the register actually means -200ps or something.
Ah, perhaps this explains why we still need to add fine-tuning parameter in rgmii-id and rgmii-txid modes to ensure that the network works properly.
> > Andrew
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