Add sysfs interfaces for CPPC autonomous selection in the cppc_cpufreq driver. The patch series is organized in two parts: - patch 1-4 refactor out the general CPPC register get and set functions in cppc_acpi.c - patches 5-6 expose sysfs files for users to control CPPC autonomous selection when supported --- Since Pierre and me have discussed about whether or not to show auto_act_window and energy_perf when auto_select is disabled. It seems like whether to show these two files has their own points. We'd like to ask for some advice. Relevant discussion: [1] https://lore.kernel.org/all/522721da-1a5c-439c-96a8-d0300dd0f906@xxxxxxxxxx/ Changelog: v4: - add REG_OPTIONAL and IS_OPTIONAL_CPC_REG to judge if a cpc register is an optional one - check whether the register is optional before CPC_SUPPORTED check in cppc_get_reg_val() and cppc_set_reg_val() - check the register's type in cppc_set_reg_val() - add macros to generally implement registers getting and setting functions - move some logic codes from cppc_cpufreq.c to cppc_acpi.c - replace cppc_get_auto_sel_caps() by cppc_get_auto_sel() v3: - change cppc_get_reg() and cppc_set_reg() name to cppc_get_reg_val() and cppc_set_reg_val() - extract cppc_get_reg_val_in_pcc() and cppc_set_reg_val_in_pcc() - return the result of cpc_read() in cppc_get_reg_val() - add pr_debug() in cppc_get_reg_val_in_pcc() when pcc_ss_id < 0 - rename 'cpunum' to 'cpu' in cppc_get_reg_val() - move some macros from drivers/cpufreq/cppc_cpufreq.c to include/acpi/cppc_acpi.h with a CPPC_XXX prefix v2: - fix some incorrect placeholder - change kstrtoul to kstrtobool in store_auto_select Lifeng Zheng (6): ACPI: CPPC: Add IS_OPTIONAL_CPC_REG macro ACPI: CPPC: Add cppc_get_reg_val and cppc_set_reg_val function ACPI: CPPC: Add macros to generally implement registers getting and setting functions ACPI: CPPC: Refactor register value 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 | 332 +++++++++--------- drivers/cpufreq/amd-pstate.c | 3 +- drivers/cpufreq/cppc_cpufreq.c | 109 ++++++ include/acpi/cppc_acpi.h | 30 +- 5 files changed, 359 insertions(+), 169 deletions(-) -- 2.33.0
