Thread (16 messages) flat view 16 messages, 3 authors, 6d ago

Re: [PATCH net-next v5 0/3] Add DAPU Telecom DAP8211R(I) Gigabit Ethernet PHY driver

From: Artem Shimko <hidden>
Date: 2026-08-04 14:09:02
Also in: linux-devicetree, lkml

Hi Andrew,

On Tue, Aug 4, 2026 at 4:32 PM Andrew Lunn [off-list ref] wrote:
That is a very odd setup, half the 2ns delay the RGMII standard asks
for? Do you have an explanation for this?
I think this is a poor example, as the delay is due to clock inversion
due to a mismatch in the PCB parameters.
Perhaps I should use a more standard delay as an example as <1950>.
Have you verified the writing of the delays in the PHY register don't
have a 1 bit shift error?
I verified them by reading back the RGMII_CON register (0xA003) after
configuration,
and the values are being applied correctly with no bit-shift error.
Just my failed in example value =)

Thank you for your time and review.

--
Best regards,
Artem
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