On Sunday, February 17, 2019 4:54:13 AM CET Xiongfeng Wang wrote: > Hisilicon chips do not support delivered performance counter register > and reference performance counter register. But the platform can > calculate the real performance using its own method. This patch provide > a workaround for this problem, and other platforms can also use this > workaround framework. We reuse the desired performance register to > store the real performance calculated by the platform. After the > platform finished the frequency adjust, it gets the real performance and > writes it into desired performance register. OS can use it to calculate > the real frequency. > > Changlog: > > v2 -> v3: > Recontruct 'cppc_get_desired_perf'. > Rename 'cppc_workaround_info' to 'cppc_workaround_oem_info' > Drop 'get_rate' member from struct cppc_workaround_oem_info > Change 'cppc_wa_get_rate' pointer to a flag to indicate whether > we need to aplly the workaround. > Move the new functions to the beginning of cppc-cpufreq.c > > > Xiongfeng Wang (2): > ACPI / CPPC: Add a helper to get desired performance > cpufreq / cppc: Work around for Hisilicon CPPC cpufreq > > drivers/acpi/cppc_acpi.c | 39 +++++++++++++++++++++++++ > drivers/cpufreq/cppc_cpufreq.c | 66 ++++++++++++++++++++++++++++++++++++++++++ > include/acpi/cppc_acpi.h | 1 + > 3 files changed, 106 insertions(+) > > Both patches applied, thanks!
