On Tue, Nov 29, 2016 at 7:36 AM, Viresh Kumar [off-list ref] wrote:

Hi,

Some platforms (like TI) have complex DVFS configuration for CPU
devices, where multiple regulators are required to be configured to
change DVFS state of the device. This was explained well by Nishanth
earlier [1].

One of the major complaints around multiple regulators case was that the
DT isn't responsible in any way to represent the order in which multiple
supplies need to be programmed, before or after a frequency change. It
was considered in this patch and such information is left for the
platform specific OPP driver now, which can register its own
opp_set_rate() callback with the OPP core and the OPP core will then
call it during DVFS.

The patches are tested on Exynos5250 (Dual A15). I have hacked around DT
and code to pass values for multiple regulators and verified that they
are all properly read by the kernel (using debugfs interface).

Dave Gerlach has already tested [2] it on the real TI platforms and it
works well for him.

This is rebased over: linux-next branch in the PM tree.

V4->V5:
- Stephen boyd had some minor review comments and gave his Reviewed-by
  tag for the rest. Only 2 patches don't have his RBY tag.
- Individual patches contain the version history from V4 to V5.

Cool.

I'd still like to see that everyone agrees with patch [6/10] in particular.

Thanks,
Rafael