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Looks like this setting comes from DTS. See e.g. the commit message
for commit 9e09e2a ("OpenThread: Change SETTINGS_CONFIG_PAGE_SIZE to
target specific value"), which mentions that it's generated "from
'erase-block-size' found in the dtsi file of devices".
Values from DTS currently can't be used as input to Kconfig, though it
might be nice if they could. There's a related issue:https://github.com/zephyrproject-rtos/zephyr/issues/7302
On Sun, Jul 29, 2018 at 3:47 PM, Cufi, Carles <Carles.Cufi@nordicsemi.no> wrote:
Kconfig options can only default to values of other Kconfig options, the whole Kconfig system is self-contained and has no access to macros in the code.
If necessary, you can convert FLASH_ERASE_BLOCK_SIZE to be a Kconfig option perhaps?
From: firstname.lastname@example.org <email@example.com> On
Behalf Of laczenJMS
Sent: 28 July 2018 11:26
Subject: [Zephyr-devel] kconfig
I am working on a subsystem and I have some problem with Kconfig. I
would like to define a configuration setting: SET_NVS_SECTOR_SIZE and
apply a default equal to the define FLASH_ERASE_BLOCK_SIZE:
int "sector size used by default NVS backend"
but this doen't work: cmake complaints that FLASH_ERASE_BLOCK_SIZE is
not defined. However I can use FLASH_ERASE_BLOCK_SIZE in a .c or .h
file, and its value is set correct.
How should I do this in Kconfig ?