clk: dt: add support for default rate/parent
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Cover letter [PATCH 0/4] clk: dt: add support for default rate/parent
Ping.
Mike, any feedback on this?
-Tero
Quoted 31 lines · Tero Kristo
Hi,
This set is a mix-match of new DT properties for generic and TI specific clock drivers. Basically provided for commenting purposes. The patches provide a way to configure clock parents / rates during boot through DT.
"default-rate" : sets rate of a clock during boot, supported for any DT
clock type (through generic clock driver)
"ti,default-parent" : selects a default parent for a multiplexer clock,
only supported for TI specific mux clock for now, as generic mux clock does not support DT clocksPatch #4 provided as a reference how to move the default rates / parents from kernel code to DT.
Default-rate logic in patch #2 looks somewhat complicated, as the clocks need to be sorted based on their parents to avoid cases where a child clock would set its rate first, just to be overridden by its parent changing rate later and resulting in incorrect rate for the child clock.
If the default-rate generic property is not going to fly, it can be moved to TI only drivers also.
-Tero
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