Re: [PATCH 0/2] net: phy: dp83822: Add support for line class driver configuration

From: Andrew Lunn
Date: Mon Jul 10 2023 - 14:38:28 EST


On Mon, Jul 10, 2023 at 08:56:18PM +0300, Vesa Jääskeläinen wrote:
> Add support to specify either class A or class B (default) for line driver.
>
> Class A: full MLT-3 on both Tx+ and Tx–
> Class B: reduced MLT-3
>
> By default the PHY is in Class B mode.

Hi Vesa

Do you have a reference to 802.3 or some other document which
describes these. How does reduced differ from full? Is this really a
hardware property of the board?

Thanks
Andrew