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Date: Sun, 5 Jun 2022 15:58:14 +0800
From: Riwen Lu <luriwen@...mail.com>
To: rafael@...nel.org, lenb@...nel.org, robert.moore@...el.com
Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
devel@...ica.org, Riwen Lu <luriwen@...inos.com>
Subject: [PATCH v1] ACPI: Split out processor thermal register from ACPI PSS
From: Riwen Lu <luriwen@...inos.com>
In prior commit 239708a3af44 ("ACPI: Split out ACPI PSS from ACPI Processor
driver"), move processor thermal register to acpi_pss_perf_init(), and it
won't excute if ACPI_CPU_FREQ_PSS not enabled.
Since ARM64 support P states by CPPC, it should also support processor
passive cooling. So split out the processor thermal cooling register from
ACPI PSS.
Signed-off-by: Riwen Lu <luriwen@...inos.com>
---
drivers/acpi/Kconfig | 2 +-
drivers/acpi/Makefile | 5 +-
drivers/acpi/processor_driver.c | 97 ++++++++++++++-------------------
include/acpi/processor.h | 4 +-
4 files changed, 45 insertions(+), 63 deletions(-)
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 1e34f846508f..2457ade3f82d 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -255,7 +255,6 @@ config ACPI_DOCK
config ACPI_CPU_FREQ_PSS
bool
- select THERMAL
config ACPI_PROCESSOR_CSTATE
def_bool y
@@ -287,6 +286,7 @@ config ACPI_PROCESSOR
depends on X86 || IA64 || ARM64 || LOONGARCH
select ACPI_PROCESSOR_IDLE
select ACPI_CPU_FREQ_PSS if X86 || IA64 || LOONGARCH
+ select THERMAL
default y
help
This driver adds support for the ACPI Processor package. It is required
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index b5a8d3e00a52..0002eecbf870 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -109,10 +109,9 @@ obj-$(CONFIG_ACPI_PPTT) += pptt.o
obj-$(CONFIG_ACPI_PFRUT) += pfr_update.o pfr_telemetry.o
# processor has its own "processor." module_param namespace
-processor-y := processor_driver.o
+processor-y := processor_driver.o processor_thermal.o
processor-$(CONFIG_ACPI_PROCESSOR_IDLE) += processor_idle.o
-processor-$(CONFIG_ACPI_CPU_FREQ_PSS) += processor_throttling.o \
- processor_thermal.o
+processor-$(CONFIG_ACPI_CPU_FREQ_PSS) += processor_throttling.o
processor-$(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 368a9edefd0c..c84738a24eca 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -142,8 +142,6 @@ static int acpi_soft_cpu_dead(unsigned int cpu)
static int acpi_pss_perf_init(struct acpi_processor *pr,
struct acpi_device *device)
{
- int result = 0;
-
acpi_processor_ppc_has_changed(pr, 0);
acpi_processor_get_throttling_info(pr);
@@ -151,53 +149,7 @@ static int acpi_pss_perf_init(struct acpi_processor *pr,
if (pr->flags.throttling)
pr->flags.limit = 1;
- pr->cdev = thermal_cooling_device_register("Processor", device,
- &processor_cooling_ops);
- if (IS_ERR(pr->cdev)) {
- result = PTR_ERR(pr->cdev);
- return result;
- }
-
- dev_dbg(&device->dev, "registered as cooling_device%d\n",
- pr->cdev->id);
-
- result = sysfs_create_link(&device->dev.kobj,
- &pr->cdev->device.kobj,
- "thermal_cooling");
- if (result) {
- dev_err(&device->dev,
- "Failed to create sysfs link 'thermal_cooling'\n");
- goto err_thermal_unregister;
- }
-
- result = sysfs_create_link(&pr->cdev->device.kobj,
- &device->dev.kobj,
- "device");
- if (result) {
- dev_err(&pr->cdev->device,
- "Failed to create sysfs link 'device'\n");
- goto err_remove_sysfs_thermal;
- }
-
return 0;
-
- err_remove_sysfs_thermal:
- sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
- err_thermal_unregister:
- thermal_cooling_device_unregister(pr->cdev);
-
- 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,
@@ -205,9 +157,6 @@ static inline int acpi_pss_perf_init(struct acpi_processor *pr,
{
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)
@@ -229,9 +178,35 @@ static int __acpi_processor_start(struct acpi_device *device)
if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
acpi_processor_power_init(pr);
- result = acpi_pss_perf_init(pr, device);
- if (result)
+ acpi_pss_perf_init(pr, device);
+
+ 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;
+ }
+
+ dev_dbg(&device->dev, "registered as cooling_device%d\n",
+ pr->cdev->id);
+
+ result = sysfs_create_link(&device->dev.kobj,
+ &pr->cdev->device.kobj,
+ "thermal_cooling");
+ if (result) {
+ dev_err(&device->dev,
+ "Failed to create sysfs link 'thermal_cooling'\n");
+ goto err_thermal_unregister;
+ }
+
+ result = sysfs_create_link(&pr->cdev->device.kobj,
+ &device->dev.kobj,
+ "device");
+ if (result) {
+ dev_err(&pr->cdev->device,
+ "Failed to create sysfs link 'device'\n");
+ goto err_remove_sysfs_thermal;
+ }
status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
acpi_processor_notify, device);
@@ -239,8 +214,11 @@ static int __acpi_processor_start(struct acpi_device *device)
return 0;
result = -ENODEV;
- acpi_pss_perf_exit(pr, device);
-
+ 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:
acpi_processor_power_exit(pr);
return result;
@@ -277,10 +255,15 @@ static int acpi_processor_stop(struct device *dev)
return 0;
acpi_processor_power_exit(pr);
- acpi_pss_perf_exit(pr, device);
-
acpi_cppc_processor_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;
+ }
+
return 0;
}
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 194027371928..f2d8f0cd1736 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -443,7 +443,7 @@ static inline int acpi_processor_hotplug(struct acpi_processor *pr)
/* in processor_thermal.c */
int acpi_processor_get_limit_info(struct acpi_processor *pr);
extern const struct thermal_cooling_device_ops processor_cooling_ops;
-#if defined(CONFIG_ACPI_CPU_FREQ_PSS) & defined(CONFIG_CPU_FREQ)
+#ifdef CONFIG_CPU_FREQ
void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy);
void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy);
#else
@@ -455,6 +455,6 @@ static inline void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy)
{
return;
}
-#endif /* CONFIG_ACPI_CPU_FREQ_PSS */
+#endif /* CONFIG_CPU_FREQ */
#endif
--
2.25.1
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