[RFC PATCH 3/3] serial: mxc: restore booting for imx8mn_bsh_smm_s2

[Fabio Estevam]

On Sat, May 17, 2025 at 5:46 PM Michael Nazzareno Trimarchi
<michael at amarulasolutions.com> wrote:

> > I was on master except this commit
> >
> > commit 128d997a8772cc174f38d529d8b25f90b3aa8ad8
> > Author: Jonas Karlman <jonas at kwiboo.se>
> > Date:   Sat May 10 15:32:01 2025 +0000
> >
> >     clk: Fix clk_set_parent() regression
> >
> >     The commit ac30d90f3367 ("clk: Ensure the parent clocks are enabled
> >     while reparenting") add a call to clk_enable() for the parent clock.
> >
> >     For clock drivers that do not implement the enable() ops, like most
> >     Rockchip clock drivers, this now cause the set_parent() ops to never
> >     be called when CLK_CCF=n (default for Rockchip).

CLK_CCF=y in your case, so this does not help for you.
>
> BTW is really needed now?
>
> git grep init_uart_clk board/freescale/imx8mn_evk/
> board/freescale/imx8mn_evk/spl.c:       init_uart_clk(1);

This can be removed. I tested without this line, and it boots fine.