Compile error when CONFIG_WDT_DISABLE_AT_BOOT is enabled for nRF5340 in NCS 2.9.0.

[lincoln-lu]

Hi,

I am building the Zephyr hello world example(C:\ncs\v2.9.0\zephyr\samples\hello_world) for nRF5340DK board, the NCS version is 2.9.0.

I enabled watchdog and WDT_DISABLE_AT_BOOT in pj.conf as below:

CONFIG_WATCHDOG=y

CONFIG_HAS_WDT_DISABLE_AT_BOOT=y

CONFIG_WDT_DISABLE_AT_BOOT=y

I did not modify any source code expect the pj.cong above, but I encounter error as below:

error: HAS_WDT_DISABLE_AT_BOOT (defined at drivers/watchdog/Kconfig:14) is assigned in a
configuration file, but is not directly user-configurable (has no prompt). It gets its value
indirectly from other symbols. See
http://docs.zephyrproject.org/latest/kconfig.html#CONFIG_HAS_WDT_DISABLE_AT_BOOT and/or look up
HAS_WDT_DISABLE_AT_BOOT in the menuconfig/guiconfig interface. The Application Development Primer,
Setting Configuration Values, and Kconfig - Tips and Best Practices sections of the manual might be
helpful too.

Question: 
if the configs I added above in pj.conf are wrong, what should I add, and where should I add them?

Thanks

[lincoln-lu]

Forgot to tell you that tt the very first, I tried as below:

NOT specifying the CONFIG_HAS_WDT_DISABLE_AT_BOOT

but specified CONFIG_WDT_DISABLE_AT_BOOT=y. and CONFIG_WATCHDOG=y in my pj.conf

KConfig gives WARNING as below:

warning: WDT_DISABLE_AT_BOOT (defined at drivers/watchdog/Kconfig:17) was assigned the value 'y' but
got the value 'n'. Check these unsatisfied dependencies: HAS_WDT_DISABLE_AT_BOOT (=n). See
http://docs.zephyrproject.org/latest/kconfig.html#CONFIG_WDT_DISABLE_AT_BOOT and/or look up
WDT_DISABLE_AT_BOOT in the menuconfig/guiconfig interface. The Application Development Primer,
Setting Configuration Values, and Kconfig - Tips and Best Practices sections of the manual might be
helpful too.

And then I added CONFIG_HAS_WDT_DISABLE_AT_BOOT=y, so I met warning as my first post above.

[Sigurd Hellesvik]

Hi,

CONFIG_WDT_DISABLE_AT_BOOT is not supported for nRF SoCs.

See  Watchdog isn't disabled at boot when CONFIG_WDT_DISABLE_AT_BOOT=y .

Does this answer your question?

Regards,
Sigurd Hellesvik

[lincoln-lu]

Sigurd Hellesvik said:

supported

OK, does that mean WDT is always enabled and can not be disabled at boot stage for nRF SoCs even in the latest NCS?

[Edit] And is CONFIG_WDT_DISABLE_AT_BOOT=y meaningless for  nRF SoCs?

[Sigurd Hellesvik]

lincoln-lu said:

OK, does that mean WDT is always enabled and can not be disabled at boot stage for nRF SoCs even in the latest NCS?

Correct. Observe that CONFIG_WDT_DISABLE_AT_BOOT is not handeled in  wdt_nrfx.c.

lincoln-lu said:

[Edit] And is CONFIG_WDT_DISABLE_AT_BOOT=y meaningless for  nRF SoCs?

Correct.