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

[Michael Nazzareno Trimarchi]

Hi

On Sat, May 17, 2025 at 10:28 PM Fabio Estevam <festevam at gmail.com> wrote:
>
> On Sat, May 17, 2025 at 5:15 PM Michael Nazzareno Trimarchi
> <michael at amarulasolutions.com> wrote:
>
> > Can you please point me to an example of a tested board?
>
> I have just tested the top-of-tree U-Boot on an imx8mn evk board:
>
> U-Boot SPL 2025.07-rc2-00018-g126a88d49bca (May 17 2025 - 17:21:14 -0300)
> WDT:   Started watchdog at 30280000 with servicing every 1000ms (60s timeout)
> SEC0:  RNG instantiated
> Normal Boot
> Trying to boot from BOOTROM
> Boot Stage: Primary boot
> image offset 0x8000, pagesize 0x200, ivt offset 0x0
> NOTICE:  Do not release JR0 to NS as it can be used by HAB
> NOTICE:  BL31: v2.12.0(release):v2.12.0
> NOTICE:  BL31: Built : 17:16:49, May 17 2025
>

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).


I can not try today but if you can, is this the commit that could break my boot?

Michael
>
> U-Boot 2025.07-rc2-00018-g126a88d49bca (May 17 2025 - 17:21:14 -0300)
>
> CPU:   NXP i.MX8MNano Quad Rev1.0 A53 at 1200 MHz
> CPU:   Consumer temperature grade (0C to 95C) at 32C
> Model: NXP i.MX8MNano DDR4 EVK board
> DRAM:  2 GiB
> Core:  180 devices, 23 uclasses, devicetree: separate
> WDT:   Started watchdog at 30280000 with servicing every 1000ms (60s timeout)
> MMC:   FSL_SDHC: 1, FSL_SDHC: 2
> Loading Environment from MMC... Reading from MMC(1)... OK
> In:    serial at 30890000
> Out:   serial at 30890000
> Err:   serial at 30890000
> SEC0:  RNG instantiated
> Net:   eth0: ethernet at 30be0000
> Hit any key to stop autoboot:  0
> u-boot=>
>
> Make sure you are using the most recent U-Boot. We had some imx8m
> clock drive hickups after 2025.04.



-- 
Michael Nazzareno Trimarchi
Co-Founder & Chief Executive Officer
M. +39 347 913 2170
michael at amarulasolutions.com
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