kasjer opened a new pull request, #3043:
URL: https://github.com/apache/mynewt-core/pull/3043
Function os_dev_init() is called in two places
First possibility is when device is created in
os_dev_create() AND g_os_started is not 0
This apply to devices that are created after main
function is called (including package defined syscfg functions).
Other place that calls os_dev_init is os_dev_initialize_all() This function
calls all os_dev_init() functions for requested stage. When
os_dev_initalize_all() is called only devices added by bsp (often delegated to
mcu) are created. Keep in mind that since g_os_started is not set yet condition
is not checked.
When mcuboot starts with sysinit() enabled it calls os_dev_initalize_all()
twice then executes sysinit(). Any device created in sysinit() will not be
initialized since g_os_started is not set.
This change stores device init stage number and uses it when devices are
initialized. For devices created by BSP initial stage is 0 so dev_init is not
called during device creation but postponed till os_dev_initialize_all() is
called (so despite condition change initialization sequence stays the same).
For devices created in sysinit() stage is already set to KERNEL and they are
initialized during creation even though g_os_started is not checked any more.
So there should not be any differences in behavior.
For MCUBoot, devices created in sysinit() will have dev_init called when
created just like it would happen when OS_SCHEDULING is enabled.
Only difference is that when device initialization fails at one stage but is
not marked as critical initialization will be attempted in next stage.
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