Re: [PATCH RFC RFT 0/3] clk: detect per-user enable imbalances and implement hand-off

[Maxime Ripard <maxime.ripard@free-electrons.com>]

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Hi Mike,

On Fri, Aug 07, 2015 at 12:09:27PM -0700, Michael Turquette wrote:
> All of the other kitchen sink stuff (DT binding, passing the flag back
> to the framework when the clock consumer driver calls clk_put) was left
> out because I do not see a real use case for it. If one can demonstrate
> a real use case (and not a hypothetical one) then this patch series can
> be expanded further.

I think there is a very trivial use case for passing back the
reference to the framework, if during the probed, we have something
like:

clk = clk_get()
clk_prepare_enable(clk)
foo_framework_register()

if foo_framework_register fails, the sensible thing to do would be to
call clk_disable_unprepare. If the clock was a critical clock, you
just gated it.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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