m68k hangs silently

Simon Glass sjg at chromium.org
Wed Feb 19 22:21:22 CET 2020

Hi Angelo,

On Wed, 19 Feb 2020 at 07:36, Angelo Dureghello
<angelo.dureghello at timesys.com> wrote:
> Hi Simon,
> after this commit:
> commit 29f7d05a347ab7a42577c67fdfb787ef91537302
> Author: Simon Glass <sjg at chromium.org>
> Date:   Sun Dec 29 21:19:17 2019 -0700
>     dm: core: Move ofdata_to_platdata() call earlier
>     This method is supposed to extract platform data from the device tree. It
>     should be done before the device itself is probed. Move it earlier in the
>     device_probe() function.
>     Signed-off-by: Simon Glass <sjg at chromium.org>
> stmark2 (mcf5441x based board) hangs silently.
> I am debugging into this, since seems to be something wrong in my arch
> files, or related dm drivers, but if you have any hint about where to
> look, welcome.

Good to have a JTAG debugger or at least a working DEBUG_UART.

It could be that you have one device relying on another's ofdata, but
the reading of it is in the probe() method instead of

Also make sure you have proper error checking in these methods since
silent failure (e.g. to read an address) can cause invalid data to be
used by the driver.

You can also enable CONFIG_LOG_ERROR_RETURN if you are using log_ret()
or log_msg_ret() in your drivers.

I can't actually even find the serial driver for m68k so I don't think
I will be much help...


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