Re: [PATCH] Revert "ARM: dts: imx: move nand related property under nand@0"

[Francesco Dolcini <francesco@dolcini.it>]

On Thu, Feb 19, 2026 at 11:01:26AM -0500, Frank Li wrote:
> On Thu, Feb 19, 2026 at 04:11:49PM +0100, max.oss.09@gmail.com wrote:
> > From: Max Krummenacher <max.krummenacher@toradex.com>
> >
> > This reverts commit 8124b4a4a96b57d6cc3705a9df9623c52baa047b.
> >
> > The change introduced a regression: at least Colibri iMX6ULL and
> > Colibri iMX7 no longer boot with that commit applied, while they boot
> > again after reverting it.
> >
> > Although this has only been verified on these two modules, the issue
> > is expected to affect all device trees using the gpmi-nand driver.
> >
> > [    0.876938] Creating 5 MTD partitions on "gpmi-nand":
> > [    0.876974] 0x000000000000-0x000000080000 : "mx7-bcb"
> > [    0.879860] 0x000000080000-0x000000200000 : "u-boot1"
> > [    0.884761] 0x000000200000-0x000000380000 : "u-boot2"
> > [    0.886993] 0x000000380000-0x000000400000 : "u-boot-env"
> > [    0.894686] 0x000000400000-0x000020000000 : "ubi"
> > [    0.899054] gpmi-nand 33002000.nand-controller: driver registered.
> > ...
> > [    0.960443] ubi0: default fastmap pool size: 200
> > [    0.960476] ubi0: default fastmap WL pool size: 100
> > [    0.960500] ubi0: attaching mtd4
> > [    1.636355] ubi0 error: scan_peb: bad image sequence number 1588722158 in PEB 4060, expected 1574791632
> > ...
> > [    1.649889] ubi0 error: ubi_attach_mtd_dev: failed to attach mtd4, error -22
> > [    1.650029] UBI error: cannot attach mtd4
> > ...
> > [    1.670262] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,253)
> 
> Can you help found the real reason why not boot?
> nand@0 is preferred format for MTD raw nand.

I already raised the issue when you sent this patch series, we need to
consider the other users of this DT blob, for example U-Boot.

Please see my comments and Krzysztof one here [1]

I agree on investigating this, but I see no other option than reverting
for now.

[1] https://lore.kernel.org/all/20251105115538.GA17091@francesco-nb/

Francesco