For each detected ACPI Processor object (ACPI0007), search its
device handle for CPPC specific tables (i.e. _CPC) and extract
CPU specific performance capabilities.
Signed-off-by: Ashwin Chaugule <ashwin.chaugule@xxxxxxxxxx>
Reviewed-by: Al Stone <al.stone@xxxxxxxxxx>
---
drivers/acpi/processor_driver.c | 6 ++++++
include/acpi/processor.h | 14 ++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index 16d44ad..6519c22 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -246,6 +246,10 @@ static int __acpi_processor_start(struct acpi_device *device)
if (pr->flags.need_hotplug_init)
return 0;
+ result = acpi_cppc_processor_probe(pr);
+ if (result)
+ return -ENODEV;
+
if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
acpi_processor_power_init(pr);
@@ -291,6 +295,8 @@ static int acpi_processor_stop(struct device *dev)
acpi_pss_perf_exit(pr, device);
+ acpi_cppc_processor_exit(pr);
+
return 0;
}
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 2c4e7a9..43ee1bf 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -314,6 +314,20 @@ phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id);
int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id);
int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
+#ifdef CONFIG_ACPI_CPPC_LIB
+extern int acpi_cppc_processor_probe(struct acpi_processor *pr);
+extern void acpi_cppc_processor_exit(struct acpi_processor *pr);
+#else
+static inline int acpi_cppc_processor_probe(struct acpi_processor *pr)
+{
+ return 0;
+}
+static inline void acpi_cppc_processor_exit(struct acpi_processor *pr)
+{
+ return;
+}
+#endif /* CONFIG_ACPI_CPPC_LIB */
+
/* in processor_pdc.c */
void acpi_processor_set_pdc(acpi_handle handle);
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
