Opened 21 months ago
Last modified 21 months ago
#18332 new bug
device_manager: device node driver initialization should take node dependencies in account
Reported by: | X512 | Owned by: | nobody |
---|---|---|---|
Priority: | normal | Milestone: | Unscheduled |
Component: | System/Kernel | Version: | R1/Development |
Keywords: | Cc: | ||
Blocked By: | Blocking: | ||
Platform: | All |
Description
This is hrev56855.
Some device drivers depend on other device nodes to be operational. So drivers must be attached first to dependency nodes. There are various ways to specify dependency nodes, for example FDT phandle
attribute. For non-x86 hardware and FDT based systems devices commonly depend on interrupt controllers, GPIO, power and clock generators, connector physical interface controllers etc.. For non-x86 hardware it is common that hardware is separated to many small parts that have separate FDT node and need separate driver instance.
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