[PATCHv2 1/8] clk: add an APPLY_RATE_CHANGE notifier event during clk_set_rate()

Stephen Boyd sboyd at codeaurora.org
Tue Jul 8 13:18:54 PDT 2014

On 07/08/14 00:15, Thomas Petazzoni wrote:
> Dear Stephen Boyd,
> On Mon, 07 Jul 2014 16:44:18 -0700, Stephen Boyd wrote:
>>> In order to solve this problem, we propose to add an APPLY_RATE_CHANGE
>>> notifier event, which gets called right after ->set_rate(), but before
>>> ->recalc_rate(), and therefore regardless of whether there was an
>>> actualy frequency change or not.
>> Is there any reason why we can't call the pmsu code (part #3) directly
>> from the cpu clock driver? It seems like if we just called the
>> .set_rate() op we wouldn't actually have changed the clock's rate. That
>> doesn't seem very intuitive and it really makes the code flow hard to
>> follow.
> Right, but what solution would you propose to achieve that? These days,
> a direct call from drivers/ code to arch/arm/mach-<foo>/ code is
> frowned upon, no? (The code handling the PMSU is in
> arch/arm/mach-mvebu/pmsu.c).

I don't see a problem with having an include file in include/linux/ for
this, maybe others do though. If it actually is a problem then perhaps
moving the pmsu.c code into drivers/ is the right solution.

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