On Tue, May 05, 2020 at 07:51:09AM +0200, Alain Volmat wrote:
> Addition of two callbacks reg_client and unreg_client that can be
> implemented by adapter drivers in order to take action whenever a
> client is being registered to it.
> 
> Signed-off-by: Alain Volmat <alain.volmat@st.com>

Sorry, but NACK. After years of work, we just recently got rid of attach
and detach callbacks. They were abused in quite a lot of ways. I think
we can find other solutions to what you need them for. Let's move the
discussion to patch 4.