[PATCH v2 6/9] soc: imx8m: don't access of_root directly

[Francesco Dolcini]

Hello Alexander, Bartosz

On Tue, Mar 24, 2026 at 11:24:09AM +0100, Alexander Stein wrote:
> Hi,
> 
> Am Montag, 23. Februar 2026, 14:37:21 CET schrieb Bartosz Golaszewski:
> > Don't access of_root directly as it reduces the build test coverage for
> > this driver with COMPILE_TEST=y and OF=n. Use existing helper functions
> > to retrieve the relevant information.
> > 
> > Suggested-by: Rob Herring <robh at kernel.org>
> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski at oss.qualcomm.com>
> 
> today I noticed the following warning running next-20260323:
> > caam 30900000.crypto: No clock data provided for i.MX SoC
> 
> This happens when there is no matching against the soc_id.
> 
> Checking the source it turns out this patch is the cause that the SoC info
> does not provide soc_id anymore.
> next-20260323:
> > $ grep . /sys/devices/soc0/*
> > /sys/devices/soc0/family:Freescale i.MX
> > /sys/devices/soc0/machine:TQ-Systems i.MX8MPlus TQMa8MPxL on MBa8MP-RAS314
> > grep: /sys/devices/soc0/power: Is a directory
> > /sys/devices/soc0/revision:unknown
> > /sys/devices/soc0/serial_number:0000000000000000
> > grep: /sys/devices/soc0/subsystem: Is a directory
> 
> reverting this patch (2524b293a59e586afd06358d0b191ab57208a920):
> > $ grep . /sys/devices/soc0/*
> > /sys/devices/soc0/family:Freescale i.MX
> > /sys/devices/soc0/machine:TQ-Systems i.MX8MPlus TQMa8MPxL on MBa8MP-RAS314
> > grep: /sys/devices/soc0/power: Is a directory
> > /sys/devices/soc0/revision:1.1
> > /sys/devices/soc0/serial_number:469677A693A4B8CE131D180033E44903
> > /sys/devices/soc0/soc_id:i.MX8MP
> > grep: /sys/devices/soc0/subsystem: Is a directory
> 
> soc_id is restored. Now that I write these lines I noticed that
> serial_number also contained empty value which is restored with the revert.

Any update on this? I would say this is a regression in 7.1-rc1.

I noticed the same issue, and CAAM is not working.

[    0.000000] Linux version 7.1.0-rc1-0.0.0-devel (oe-user at oe-host) (aarch64-tdx-linux-gcc (GCC) 15.2.0, GNU ld (GNU Binutils) 2.46) #1 SMP PREEMPT Sun Apr 26 21:19:00 UTC 2026
...
[   10.611139] caam 30900000.crypto: No clock data provided for i.MX SoC
[   10.611211] caam 30900000.crypto: probe with driver caam failed with error -22

Francesco