Re: [RFC PATCH net-next 2/2] net: ti: icssg-prueth: Add support for half duplex operation

From: Andrew Lunn
Date: Mon Sep 04 2023 - 10:17:47 EST


On Wed, Aug 30, 2023 at 05:01:34PM +0530, MD Danish Anwar wrote:
> This patch adds support for half duplex operation at 10M and 100M link
> speeds for AM654x/AM64x devices.
> - Driver configures rand_seed, a random number, in DMEM HD_RAND_SEED_OFFSET
> field, which will be used by firmware for Back off time calculation.
> - Driver informs FW about half duplex link operation in DMEM
> PORT_LINK_SPEED_OFFSET field by setting bit 7 for 10/100M HD.
>
> Hence, the half duplex operation depends on board design the
> "ti,half-duplex-capable" property has to be enabled for ICSS-G ports if HW
> is capable to perform half duplex.
>
> Signed-off-by: MD Danish Anwar <danishanwar@xxxxxx>

Reviewed-by: Andrew Lunn <andrew@xxxxxxx>

Andrew