drivers: ethernet: eth_stm32_hal: support `get_config`

[clamattia]

Is your enhancement proposal related to a problem? Please describe.
There is currently no good way to query the configuration of the Ethernet on this driver (to my knowledge).

Describe the solution you'd like
Please implement int(* get_config )(const struct device *dev, enum ethernet_config_type type, struct ethernet_config *config) for the eth_stm32_hal-driver.

Describe alternatives you've considered
None

Additional context
None

[ramram885]

Hello community,

I'm just new to zephyr and open source software development. Recently started to study about network drivers development too.

In zephyr project, I could see that many of the ethernet drivers have implemented only set_config() function in the driver code.
I couldn't find much drivers that has implemented get_config() function. Can any one please explain reason behind this.

And I could see that many drivers have implementation for get_capabilities(). Is the get_capabilities() function itself enough to fulfill the implementation of get_config()?. Because I am thinking that, If we implement the get_config(), the functionality will be more or less same as get_capabilities().
Is the understanding is correct or not?

Thanks!

[erwango]

@ramram885 Please open a dedicated discussion for you questions or alternatively engage on Zephyr Discord the network channel.