On Thu, Feb 29, 2024 at 08:31:55AM +0100, Bastien Curutchet wrote:

Hi Andrew,

On 2/27/24 17:18, Andrew Lunn wrote:

quoted

On Tue, Feb 27, 2024 at 10:39:45AM +0100, Bastien Curutchet wrote:

quoted

The PHY is able to use copper or fiber. The fiber mode can be enabled or
disabled by hardware strap. If hardware strap is incorrect, PHY can't
establish link.

Add a DT attribute 'ti,fiber-mode' that can be use to override the
hardware strap configuration. If the property is not present, hardware
strap configuration is left as is.

How have you tested this? Do you have a RDK with it connected to an
SFP cage?

I did not test fiber mode as my board uses copper.

My use case is that I need to explicitly disable the fiber mode because the
strap hardware is
misconfigured and could possibly enable fiber mode from time to time.

O.K. So lets refocus this is little. Rather than support fibre mode,
just support disabling fibre mode. But leave a clear path for somebody
to add fibre support sometime in the future.

Looking at the current code, do you think fibre mode actually works
today? If you think it cannot actually work today in fibre mode, one
option would be to hard code it to copper mode. Leave the
configuration between fibre and copper mode to the future when
somebody actually implements fibre mode.

   Andrew