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Date:   Thu, 10 Jun 2021 16:57:29 +0200
From:   Andrew Lunn <andrew@lunn.ch>
To:     Zhou Yanjie <zhouyanjie@wanyeetech.com>
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Subject: Re: [PATCH v2 2/2] net: stmmac: Add Ingenic SoCs MAC support.
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> 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.

   Andrew