[v6,0/4] CPUFreq: Add support for opp-sharing cpus

Message

Nicola Mazzucato Jan. 11, 2021, 3:45 p.m. UTC

Hi All,

In this V6 posting I have addressed comments on reworking the scmi cpufreq
driver in smaller changes.

This is to support systems where exposed cpu performance controls are more
fine-grained that the platform's ability to scale cpus independently.

Many thanks,
Nicola

[v6]
  * Remove deferred probe, not occurring
  * Move common stuff for CPUs from _init stage to _probe

This V6 is rebased on next-20210111

[v5]
  * Rework documentation of opp-shared within OPP node
  * Register EM only for the first CPU within cpumask in driver
  * Add check for nr_opp in driver before registering EM
  * Add comments on both dev_pm_opp_get_opp_count in driver
  * Remove redundant ret=0 in driver

This v5 is rebased on top of:
next-20201208 + Lukasz Luba's patches [1]

[v4]
  * Remove unconditional set of opp_table->shared_opp to exclusive
  * Add implementation for scmi-cpufreq
  * Change subject

These patches are on top of:
next-20201201 + Lukasz Luba's patches (waiting for Rafael) [1]

[v3]
  * Remove proposal for new 'cpu-performance-dependencies' as we instead
    can reuse the opp table.
  * Update documentation for devicetree/bindings/opp
  * Minor changes within opp to support empty opp table
  * Rework the RFC by adding a second proposal

[v2]
  * Fix errors when running make dt_binding_check
  * Improve commit message description for the dt-binding
  * Add RFC for implementation in cpufreq-core and one of its
    drivers.

Nicola Mazzucato (3):
  scmi-cpufreq: Remove deferred probe
  scmi-cpufreq: Move CPU initialisation to probe
  scmi-cpufreq: Get opp_shared_cpus from opp-v2 for EM

Sudeep Holla (1):
  cpufreq: blacklist Arm Vexpress platforms in cpufreq-dt-platdev

 drivers/cpufreq/cpufreq-dt-platdev.c |   2 +
 drivers/cpufreq/scmi-cpufreq.c       | 196 +++++++++++++++++++++------
 2 files changed, 155 insertions(+), 43 deletions(-)