[PATCH 0/4] clk: dt: add support for default rate/parent

Tero Kristo t-kristo at ti.com
Wed Mar 5 08:10:17 EST 2014


Mike, any feedback on this?


On 02/13/2014 11:00 AM, Tero Kristo wrote:
> 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 clocks
> Patch #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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