PM /Domain/OPP: Add support to get performance state from DT

Hi,

Now that the DT bindings [1] are already Reviewed/Acked by respective maintainers, here is the code to start using them.

The first two patches provide helpers in the OPP core, [3-5]/7 update the PM domain core to start supporting domain OPP tables, etc, 6/7 updates the OPP core to use the new callback provided by the PM domains to get performance state and the last one removes the unused helpers now.

This is tested on Hikey620 and works just fine.

--
viresh

[1] https://lkml.kernel.org/r/[email protected]

Viresh Kumar (7):
PM / OPP: Implement dev_pm_opp_of_add_table_indexed() PM / OPP: Implement of_dev_pm_opp_find_required_opp() PM / Domain: Add struct device to genpd
PM / Domain: Add support to parse domain's OPP table PM / Domain: Implement of_dev_pm_genpd_get_performance_state() PM / OPP: Get performance state using genpd helper PM / OPP: Remove dev_pm_opp_{un}register_get_pstate_helper()

 drivers/base/power/domain.c | 159 ++++++++++++++++++++++++++++++++++++++++----
 drivers/opp/core.c          |  82 +----------------------
 drivers/opp/of.c            | 123 +++++++++++++++++++++++++++++++---
 drivers/opp/opp.h           |   3 +-
 include/linux/pm_domain.h   |  12 ++++
 include/linux/pm_opp.h      |  22 +++---
 6 files changed, 284 insertions(+), 117 deletions(-)

2.15.0.194.g9af6a3dea062