[PATCH v7 7/8] CPPC: Probe for CPPC tables for each ACPI Processor object
From: Ashwin Chaugule <hidden>
Date: 2015-07-09 18:04:23
Also in:
linux-acpi
Subsystem:
acpi, acpi component architecture (acpica), arm64 port (aarch64 architecture), the rest · Maintainers:
"Rafael J. Wysocki", Saket Dumbre, Catalin Marinas, Will Deacon, Linus Torvalds
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 <redacted> Reviewed-by: Al Stone <redacted> --- arch/arm64/Kconfig | 1 + drivers/acpi/Kconfig | 2 +- drivers/acpi/processor_driver.c | 4 ++++ include/acpi/processor.h | 9 +++++++++ 4 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7796af4..feff114 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig@@ -83,6 +83,7 @@ config ARM64 select SPARSE_IRQ select SYSCTL_EXCEPTION_TRACE select HAVE_CONTEXT_TRACKING + select ACPI_CPPC_LIB if ACPI help ARM 64-bit (AArch64) Linux support.
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 54d73bb..097c02a 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig@@ -198,7 +198,7 @@ config ACPI_CPPC_LIB config ACPI_PROCESSOR tristate "Processor" select CPU_IDLE if ACPI_PROCESSOR_IDLE - depends on X86 || IA64 + depends on X86 || IA64 || ARM64 default y help This driver adds support for the ACPI Processor package. It is required
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index 16d44ad..ac3dd51 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);
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index c071a92..6e53b5e 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h@@ -328,6 +328,15 @@ 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); +#else +static inline int acpi_cppc_processor_probe(struct acpi_processor *pr) +{ + return 0; +} +#endif /* CONFIG_ACPI_CPPC_LIB */ + /* in processor_pdc.c */ void acpi_processor_set_pdc(acpi_handle handle);
--
1.9.1