The notifiers in the clk framework might be a better place for this than
just simply hacking the logic into the .set_rate callback.

Ah, right.  How did I forget about that nice piece?

I haven't looked at the definition of hb_voltage_change but does the
call graph make any clk api calls?  Are you talking over i2c to a
regulator?  If so then you'll probably hit the same reentrancy problem I
hit when trying to make a general solution.

So, how is your "reentrancy in the common clk framework" series[1]
going on?  Haven't seen any update since August.

Shawn

[1] http://thread.gmane.org/gmane.linux.ports.arm.kernel/182198