Add sysfs interfaces for CPPC autonomous selection in the cppc_cpufreq
driver.

The patch series is organized in two parts:

 - patch 1 refactor out the general CPPC register get and set functions
   in cppc_acpi.c

 - patches 2-3 expose sysfs files for users to control CPPC autonomous
   selection when supported

Change since v1:
 - fix some incorrect placeholder
 - change kstrtoul to kstrtobool in store_auto_select

Lifeng Zheng (3):
  ACPI: CPPC: Refactor register get and set ABIs
  ACPI: CPPC: Add autonomous selection ABIs
  cpufreq: CPPC: Support for autonomous selection in cppc_cpufreq

 .../ABI/testing/sysfs-devices-system-cpu      |  54 ++++
 drivers/acpi/cppc_acpi.c                      | 235 +++++++++---------
 drivers/cpufreq/cppc_cpufreq.c                | 138 ++++++++++
 include/acpi/cppc_acpi.h                      |  20 ++
 4 files changed, 328 insertions(+), 119 deletions(-)

-- 
2.33.0