Make PCA9532 LEDs blink?

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How can I make PCA9532-controlled LEDs blink (without continually
turning them on and off in my application)?

I know that the hardware is capable, and I can see that the driver has
a blink_set function, but I can't figure out how to access it from
userspace.  (This may be more of a general API question than PCA9532-
specific.)

Thanks!

-- 
========================================================================
Ian Pilcher                                         arequipeno@xxxxxxxxx
Sometimes there's nothing left to do but crash and burn...or die trying.
========================================================================

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