Re: [PATCH/RFC 0/6] ARM: runtime PM: consolidate runtime PM implementations

[Kevin Hilman <khilman@ti.com>]

Kevin Hilman <khilman@ti.com> writes:

[...]

> Replacing the PM ops for all devices was done on OMAP and SH-mobile
> because that was the only approach we had.  Now that we have device
> power domains (thanks Rafael!), we can be more selective about which
> devices to apply them to.
>
> Note that my RFC patch/series did not do the selective part of deciding
> which devices to override and which ones not to, that part will be
> platform specific.  

Actually, thinking about this a little more, my patch actually does
select only relevant devices, and not *all* platform devices.

In my patch, the device power domain pointers are only added for devices
where a clk_get() actually succeeds.  In the original version, the
runtime PM hooks are overridden for *all* platform devices, but ones
that have no clock (or where clk_get() failed) have the additional
overhead of still calling the custom PM ops, but the custom ops have
nothing to do.

Kevin