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

[Francesco Dolcini]

+Peng

Hello all,

On Mon, Apr 27, 2026 at 08:47:04AM +0200, Francesco Dolcini wrote:
> 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

I guess this is the fix

https://lore.kernel.org/all/20260427-soc-imx8m-fix-v1-1-1fe5b43d8090@nxp.com/