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ACPI: CPPC: Add emtpy stubs of functions for CONFIG_ACPI_CPPC_LIB unset

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For convenience, add empty stubs of library functions defined in
cppc_acpi.c for the CONFIG_ACPI_CPPC_LIB unset case.

Because one of them needs to return CPUFREQ_ETERNAL, include
linux/cpufreq.h into the CPPC library header file and drop the
direct inclusion of it from cppc_acpi.c.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Chen Yu <yu.c.chen@intel.com>
This commit is contained in:
Rafael J. Wysocki 2021-03-16 16:54:03 +01:00
parent 0d02ec6b31
commit 8a02d99876
2 changed files with 40 additions and 1 deletions
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1
drivers/acpi/cppc_acpi.c
View File

@ -33,7 +33,6 @@
#define pr_fmt(fmt) "ACPI CPPC: " fmt
#include <linux/cpufreq.h>
#include <linux/delay.h>
#include <linux/iopoll.h>
#include <linux/ktime.h>

40
include/acpi/cppc_acpi.h
View File

@ -11,6 +11,7 @@
#define _CPPC_ACPI_H
#include <linux/acpi.h>
#include <linux/cpufreq.h>
#include <linux/types.h>
#include <acpi/pcc.h>
@ -132,6 +133,7 @@ struct cppc_cpudata {
cpumask_var_t shared_cpu_map;
};
#ifdef CONFIG_ACPI_CPPC_LIB
extern int cppc_get_desired_perf(int cpunum, u64 *desired_perf);
extern int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs);
extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);
@ -142,5 +144,43 @@ extern unsigned int cppc_get_transition_latency(int cpu);
extern bool cpc_ffh_supported(void);
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);
#else /* !CONFIG_ACPI_CPPC_LIB */
static inline int cppc_get_desired_perf(int cpunum, u64 *desired_perf)
{
return -ENOTSUPP;
}
static inline int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs)
{
return -ENOTSUPP;
}
static inline int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls)
{
return -ENOTSUPP;
}
static inline int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps)
{
return -ENOTSUPP;
}
static inline bool acpi_cpc_valid(void)
{
return false;
}
static inline unsigned int cppc_get_transition_latency(int cpu)
{
return CPUFREQ_ETERNAL;
}
static inline bool cpc_ffh_supported(void)
{
return false;
}
static inline int cpc_read_ffh(int cpunum, struct cpc_reg *reg, u64 *val)
{
return -ENOTSUPP;
}
static inline int cpc_write_ffh(int cpunum, struct cpc_reg *reg, u64 val)
{
return -ENOTSUPP;
}
#endif /* !CONFIG_ACPI_CPPC_LIB */
#endif /* _CPPC_ACPI_H*/