# Re: \[PATCH net-next 02/13\] dt-bindings: net: cdns,macb: allow tsu\_clk without tx\_clk

- From: Théo Lebrun \<theo.lebrun@bootlin.com\>
- Date: 2025-03-27 14:56:02 
- List: netdev
- Page: https://ratatoskr.run/netdev/2025/03/2988313
- Thread: https://ratatoskr.run/netdev/2025/03/2981789/t.md

```text
On Mon Mar 24, 2025 at 5:30 PM CET, Rob Herring wrote:
> On Fri, Mar 21, 2025 at 08:09:33PM +0100, Théo Lebrun wrote:
>> Allow providing tsu_clk without a tx_clk as both are optional.
>
> Why? Is there some new h/w? Where's the compatible for it. Or this fixes 
> some existing user? Which one?

I encountered this while supporting a new compatible yes:
mobileye,eyeq5-gem.

But this is more about relaxing unneeded requirements: the previous
bindings said "if you provide a tsu_clk, please provide a tx_clk". That
constraint can be removed as there is no relation inbetween tx_clk and
tsu_clk.

So I'd describe that as a semantic fix of the dt-bindings, that happens
to be useful for our newly introduced compatible.

Or am I mistaken? In any case, I should expand the commit message.

Thanks,

--
Théo Lebrun, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

```