Locking in the clk API

[Saravana Kannan]

On 01/21/2011 01:40 AM, Russell King - ARM Linux wrote:
> On Thu, Jan 20, 2011 at 11:16:04PM -0800, Saravana Kannan wrote:
>> This suggestion looked promising till I realized that clk_set_rate()
>> will still be atomic. clk_set_rate() will need to enable/disable the
>> PLLs depending on which PLLs the rates are derived from. So, the locking
>> in clk_prepare/unprepare() still has to be atomic since the "slow stuff"
>> is shared with clk_set_rate().
>
> Who calls clk_set_rate() from an atomic context?  Do we know whether
> anyone does?

I have had internal teams asking about it. I will try to check if they 
mainlined any of it yet or continue to want to do that in atomic context 
and get back.

-Saravana

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