I’m trying to get the CPU ID on Colibri iMX7D. The result of cat /proc/cpuinfo
is:
Hardware : Freescale i.MX7 Dual (Device Tree)
Revision : 0000
Serial : 0000000000000000
Why is the serial field empty?
I see that u-boot has the option CONFIG_SERIAL_TAG
disabled. When I’ve tried to enable it (in colibri_imx7.h
) and compile the u-boot, then there is conflict between get_board_serial
functions in tdx-common.c
and soc.c
. I tried to manually disable each of the conflicting functions. It helped (u-boot is compiling correctly) but cpuinfo
still has serial set to zeros.
we’re using SoC id:
Remember that procfs is technically deprecated, and use of it should be avoided.
Do you have valid config block updated with valid serial number ?
If not update the config block via U-Boot terminal by running the cmd:
# cfgblock create
The serial number available in cpuinfo is set by U-Boot from the data available in config block.
You can get the Toradex serial number from the device tree using the standard serial-number
property:
cat /proc/device-tree/serial-number
We also added two Toradex specific properties:
cat /proc/device-tree/toradex,board-rev
cat /proc/device-tree/toradex,product-id
If the procfs is deprecated, the serial number from the white sticker can be obtained this way as well:
cat /sys/firmware/devicetree/base/serial-number
hi @cicicok
Thanks for your valuable input.
Best regards,
Jaski