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-rw-r--r--drivers/acpi/Kconfig15
-rw-r--r--drivers/acpi/Makefile5
-rw-r--r--drivers/acpi/processor_driver.c86
-rw-r--r--include/acpi/processor.h28
4 files changed, 96 insertions, 38 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 114cf48085ab..d6e2a869033c 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -189,17 +189,20 @@ config ACPI_DOCK
This driver supports ACPI-controlled docking stations and removable
drive bays such as the IBM Ultrabay and the Dell Module Bay.
+config ACPI_CPU_FREQ_PSS
+ bool
+ select THERMAL
+
config ACPI_PROCESSOR
tristate "Processor"
- select THERMAL
- select CPU_IDLE
depends on X86 || IA64
+ select CPU_IDLE
+ select ACPI_CPU_FREQ_PSS
default y
help
- This driver installs ACPI as the idle handler for Linux and uses
- ACPI C2 and C3 processor states to save power on systems that
- support it. It is required by several flavors of cpufreq
- performance-state drivers.
+ This driver adds support for the ACPI Processor package. It is required
+ by several flavors of cpufreq performance-state, thermal, throttling and
+ idle drivers.
To compile this driver as a module, choose M here:
the module will be called processor.
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 8321430d7f24..7e97aef373ae 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -80,8 +80,9 @@ obj-$(CONFIG_ACPI_CUSTOM_METHOD)+= custom_method.o
obj-$(CONFIG_ACPI_BGRT) += bgrt.o
# processor has its own "processor." module_param namespace
-processor-y := processor_driver.o processor_throttling.o
-processor-y += processor_idle.o processor_thermal.o
+processor-y := processor_driver.o processor_idle.o
+processor-$(CONFIG_ACPI_CPU_FREQ_PSS) += processor_throttling.o \
+ processor_thermal.o
processor-$(CONFIG_CPU_FREQ) += processor_perflib.o
obj-$(CONFIG_ACPI_PROCESSOR_AGGREGATOR) += acpi_pad.o
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index cc820d840c61..3fea539aa43e 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -163,34 +163,24 @@ static struct notifier_block acpi_cpu_notifier = {
.notifier_call = acpi_cpu_soft_notify,
};
-static int __acpi_processor_start(struct acpi_device *device)
+#ifdef CONFIG_ACPI_CPU_FREQ_PSS
+static int acpi_pss_perf_init(struct acpi_processor *pr,
+ struct acpi_device *device)
{
- struct acpi_processor *pr = acpi_driver_data(device);
- acpi_status status;
int result = 0;
- if (!pr)
- return -ENODEV;
-
- if (pr->flags.need_hotplug_init)
- return 0;
-
-#ifdef CONFIG_CPU_FREQ
acpi_processor_ppc_has_changed(pr, 0);
-#endif
+
acpi_processor_get_throttling_info(pr);
if (pr->flags.throttling)
pr->flags.limit = 1;
- if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
- acpi_processor_power_init(pr);
-
pr->cdev = thermal_cooling_device_register("Processor", device,
&processor_cooling_ops);
if (IS_ERR(pr->cdev)) {
result = PTR_ERR(pr->cdev);
- goto err_power_exit;
+ return result;
}
dev_dbg(&device->dev, "registered as cooling_device%d\n",
@@ -204,6 +194,7 @@ static int __acpi_processor_start(struct acpi_device *device)
"Failed to create sysfs link 'thermal_cooling'\n");
goto err_thermal_unregister;
}
+
result = sysfs_create_link(&pr->cdev->device.kobj,
&device->dev.kobj,
"device");
@@ -213,17 +204,61 @@ static int __acpi_processor_start(struct acpi_device *device)
goto err_remove_sysfs_thermal;
}
- status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
- acpi_processor_notify, device);
- if (ACPI_SUCCESS(status))
- return 0;
-
sysfs_remove_link(&pr->cdev->device.kobj, "device");
err_remove_sysfs_thermal:
sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
err_thermal_unregister:
thermal_cooling_device_unregister(pr->cdev);
- err_power_exit:
+
+ return result;
+}
+
+static void acpi_pss_perf_exit(struct acpi_processor *pr,
+ struct acpi_device *device)
+{
+ if (pr->cdev) {
+ sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
+ sysfs_remove_link(&pr->cdev->device.kobj, "device");
+ thermal_cooling_device_unregister(pr->cdev);
+ pr->cdev = NULL;
+ }
+}
+#else
+static inline int acpi_pss_perf_init(struct acpi_processor *pr,
+ struct acpi_device *device)
+{
+ return 0;
+}
+
+static inline void acpi_pss_perf_exit(struct acpi_processor *pr,
+ struct acpi_device *device) {}
+#endif /* CONFIG_ACPI_CPU_FREQ_PSS */
+
+static int __acpi_processor_start(struct acpi_device *device)
+{
+ struct acpi_processor *pr = acpi_driver_data(device);
+ acpi_status status;
+ int result = 0;
+
+ if (!pr)
+ return -ENODEV;
+
+ if (pr->flags.need_hotplug_init)
+ return 0;
+
+ if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
+ acpi_processor_power_init(pr);
+
+ result = acpi_pss_perf_init(pr, device);
+ if (result)
+ goto err_power_exit;
+
+ status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+ acpi_processor_notify, device);
+ if (ACPI_SUCCESS(status))
+ return 0;
+
+err_power_exit:
acpi_processor_power_exit(pr);
return result;
}
@@ -252,15 +287,10 @@ static int acpi_processor_stop(struct device *dev)
pr = acpi_driver_data(device);
if (!pr)
return 0;
-
acpi_processor_power_exit(pr);
- if (pr->cdev) {
- sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
- sysfs_remove_link(&pr->cdev->device.kobj, "device");
- thermal_cooling_device_unregister(pr->cdev);
- pr->cdev = NULL;
- }
+ acpi_pss_perf_exit(pr, device);
+
return 0;
}
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 4188a4d3b597..b6c917835805 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -318,6 +318,7 @@ int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
void acpi_processor_set_pdc(acpi_handle handle);
/* in processor_throttling.c */
+#ifdef CONFIG_ACPI_CPU_FREQ_PSS
int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
int acpi_processor_get_throttling_info(struct acpi_processor *pr);
extern int acpi_processor_set_throttling(struct acpi_processor *pr,
@@ -330,6 +331,29 @@ extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
unsigned long action);
extern const struct file_operations acpi_processor_throttling_fops;
extern void acpi_processor_throttling_init(void);
+#else
+static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
+{
+ return 0;
+}
+
+static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr)
+{
+ return -ENODEV;
+}
+
+static inline int acpi_processor_set_throttling(struct acpi_processor *pr,
+ int state, bool force)
+{
+ return -ENODEV;
+}
+
+static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
+ unsigned long action) {}
+
+static inline void acpi_processor_throttling_init(void) {}
+#endif /* CONFIG_ACPI_CPU_FREQ_PSS */
+
/* in processor_idle.c */
int acpi_processor_power_init(struct acpi_processor *pr);
int acpi_processor_power_exit(struct acpi_processor *pr);
@@ -348,7 +372,7 @@ static inline void acpi_processor_syscore_exit(void) {}
/* in processor_thermal.c */
int acpi_processor_get_limit_info(struct acpi_processor *pr);
extern const struct thermal_cooling_device_ops processor_cooling_ops;
-#ifdef CONFIG_CPU_FREQ
+#if defined(CONFIG_ACPI_CPU_FREQ_PSS) & defined(CONFIG_CPU_FREQ)
void acpi_thermal_cpufreq_init(void);
void acpi_thermal_cpufreq_exit(void);
#else
@@ -360,6 +384,6 @@ static inline void acpi_thermal_cpufreq_exit(void)
{
return;
}
-#endif
+#endif /* CONFIG_ACPI_CPU_FREQ_PSS */
#endif