sleeping clk_[enable,disable]?

Linus Walleij at
Tue Feb 23 16:36:40 EST 2010

2010/2/23 Rabin Vincent <rabin at>:

> On Tue, Feb 23, 2010 at 03:32:19PM +0100, Linus Walleij wrote:

>> * Throw in udelay():s after the clk_[enable,disable] calls, with some values
>>   that are unfortunately then spread out in the drivers instead of in the
>>   clk implementation.
> Or you could place the udelay()s inside the clk_* calls themselves.  See
> mach-pxa/clock.c or plat-stmp3xxx/clock.c.

Hm, yeah pxa has a the maximum defined delay 5 us, and stmp3xx has
a maximum of 10 us both probably acceptable delays in a fastpath. So your
system latency requirements control the limit here and in that case ...
perhaps one would better just switch all interrupt handlers where a
clk_enable/disable occurs to threaded anyway just to be on the safe
side. (Just thinking aloud a bit...)

Linus Walleij

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