On Fri, Aug 05, 2022 at 11:53:18PM +0300, Andy Shevchenko wrote:

> The commit 6b8e090ecc3d ("regmap: use IS_ERR() to check clk_get()
> results") assumes that CLK calls return the error pointer when clock
> is not found. However in the current code the described situation
> is simply impossible, because the regmap won't be created with
> missed clock if requested. The only way when it can be the case is
> what the above mentioned commit introduced by itself, when clock is
> not provided.

> Taking above into consideration, effectively revert the commit
> 6b8e090ecc3d and while at it, drop unneeded NULL checks since CLK
> calls are NULL-aware.

I don't understand the supposed benefit of this.  Yes, the clk API does
currently accept NULL as a valid clock and returns it as a dummy but
explicitly taking advantage of that in the way that this does just feels
more sloppy than the current behaviour.