Hi all

As already done to resume from hibernation I would add a standard way to
 manage the resume from standby in the clock framework.

To do that each clock has to declare to the clock framework what it has 
to do with the clock it-self.

As general rule during a standby a clock can be:
 - reduced or
 - disabled

therefore in the flags field the clock has to specify what it wants.

The ratio in standby is a specified with the highest 16 bits in the 
flags fields with a rule:

#define CLK_PM_EXP_SHIFT       (24)
#define CLK_PM_RATIO_SHIFT     (16)

ratio = ((clk->flags >> CLK_PM_RATIO_SHIFT) & 0xff) << ((clk->flags >> 
CLK_PM_EXP_SHIFT) & 0xff);

While to enable/disable I'm using the convention that if the

 (clk->flags & CLK_PM_TURNOFF) == CLK_PM_TURNOFF)

than the clock has to be disabled.


In this manned in a single place (where the clock topology is designed) 
the developers
 can design also the configuration during the standby.

What do you think?
Regards
 Francesco