Re: [PATCH] clk: Add functions to get optional clocks

[Russell King - ARM Linux]

On Wed, Jul 18, 2018 at 01:57:38PM +0100, Phil Edworthy wrote:
> Behaves the same as (devm_)clk_get except where there is no clock
> producer. In this case, instead of returning -ENOENT, the function
> returns NULL. This makes error checking simpler and allows
> clk_prepare_enable, etc to be called on the returned reference
> without additional checks.

How does this work with non-DT systems, where looking a clock up which
isn't yet registered with clkdev returns -ENOENT ?

(clkdev doesn't know when all clocks are registered with it.)

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