diff options
| author | Wyes Karny <wyes.karny@amd.com> | 2023-03-07 11:27:36 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-03-17 19:06:23 +0100 |
| commit | c984f5d5d45bd5f80d6a9d8541e809300c963aca (patch) | |
| tree | 53b4ee95ea8a4aeaf7a78c03b43ecdd62112ac2e /include/acpi/cppc_acpi.h | |
| parent | 76531df5e13b5b997a17940d6980a168c616e962 (diff) | |
ACPI: CPPC: Add auto select register read/write support
For some AMD shared memory based systems, the autonomous selection bit
needed to be set explicitly. Add autonomous selection register related
APIs to acpi driver, which amd_pstate driver uses later.
Acked-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Wyes Karny <wyes.karny@amd.com>
[ rjw: Fixed up kerneldoc comments, white space adjustment, subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/acpi/cppc_acpi.h')
| -rw-r--r-- | include/acpi/cppc_acpi.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h index 6b487a5bd638..6126c977ece0 100644 --- a/include/acpi/cppc_acpi.h +++ b/include/acpi/cppc_acpi.h @@ -109,6 +109,7 @@ struct cppc_perf_caps { u32 lowest_freq; u32 nominal_freq; u32 energy_perf; + bool auto_sel; }; struct cppc_perf_ctrls { @@ -153,6 +154,8 @@ extern int cpc_read_ffh(int cpunum, struct cpc_reg *reg, u64 *val); extern int cpc_write_ffh(int cpunum, struct cpc_reg *reg, u64 val); extern int cppc_get_epp_perf(int cpunum, u64 *epp_perf); extern int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable); +extern int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps); +extern int cppc_set_auto_sel(int cpu, bool enable); #else /* !CONFIG_ACPI_CPPC_LIB */ static inline int cppc_get_desired_perf(int cpunum, u64 *desired_perf) { @@ -214,6 +217,14 @@ static inline int cppc_get_epp_perf(int cpunum, u64 *epp_perf) { return -ENOTSUPP; } +static inline int cppc_set_auto_sel(int cpu, bool enable) +{ + return -ENOTSUPP; +} +static inline int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps) +{ + return -ENOTSUPP; +} #endif /* !CONFIG_ACPI_CPPC_LIB */ #endif /* _CPPC_ACPI_H*/ |