aboutsummaryrefslogtreecommitdiff
path: root/drivers/acpi/thermal.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/thermal.c')
-rw-r--r--drivers/acpi/thermal.c110
1 files changed, 67 insertions, 43 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 6a0329340b4..112817e963e 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -41,10 +41,10 @@
#include <linux/kmod.h>
#include <linux/reboot.h>
#include <linux/device.h>
-#include <asm/uaccess.h>
#include <linux/thermal.h>
-#include <acpi/acpi_bus.h>
-#include <acpi/acpi_drivers.h>
+#include <linux/acpi.h>
+#include <linux/workqueue.h>
+#include <asm/uaccess.h>
#define PREFIX "ACPI: "
@@ -91,6 +91,8 @@ static int psv;
module_param(psv, int, 0644);
MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
+static struct workqueue_struct *acpi_thermal_pm_queue;
+
static int acpi_thermal_add(struct acpi_device *device);
static int acpi_thermal_remove(struct acpi_device *device);
static void acpi_thermal_notify(struct acpi_device *device, u32 event);
@@ -102,9 +104,13 @@ static const struct acpi_device_id thermal_device_ids[] = {
MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
#ifdef CONFIG_PM_SLEEP
+static int acpi_thermal_suspend(struct device *dev);
static int acpi_thermal_resume(struct device *dev);
+#else
+#define acpi_thermal_suspend NULL
+#define acpi_thermal_resume NULL
#endif
-static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, NULL, acpi_thermal_resume);
+static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume);
static struct acpi_driver acpi_thermal_driver = {
.name = "thermal",
@@ -185,6 +191,7 @@ struct acpi_thermal {
struct thermal_zone_device *thermal_zone;
int tz_enabled;
int kelvin_offset;
+ struct work_struct thermal_check_work;
};
/* --------------------------------------------------------------------------
@@ -299,8 +306,8 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"No critical threshold\n"));
} else if (tmp <= 2732) {
- printk(KERN_WARNING FW_BUG "Invalid critical threshold "
- "(%llu)\n", tmp);
+ pr_warn(FW_BUG "Invalid critical threshold (%llu)\n",
+ tmp);
tz->trips.critical.flags.valid = 0;
} else {
tz->trips.critical.flags.valid = 1;
@@ -317,8 +324,8 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
* Allow override critical threshold
*/
if (crt_k > tz->trips.critical.temperature)
- printk(KERN_WARNING PREFIX
- "Critical threshold %d C\n", crt);
+ pr_warn(PREFIX "Critical threshold %d C\n",
+ crt);
tz->trips.critical.temperature = crt_k;
}
}
@@ -337,7 +344,7 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
tz->trips.hot.flags.valid = 1;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Found hot threshold [%lu]\n",
- tz->trips.critical.temperature));
+ tz->trips.hot.temperature));
}
}
@@ -390,8 +397,7 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
status = acpi_evaluate_reference(tz->device->handle, "_PSL",
NULL, &devices);
if (ACPI_FAILURE(status)) {
- printk(KERN_WARNING PREFIX
- "Invalid passive threshold\n");
+ pr_warn(PREFIX "Invalid passive threshold\n");
tz->trips.passive.flags.valid = 0;
}
else
@@ -453,8 +459,8 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
status = acpi_evaluate_reference(tz->device->handle,
name, NULL, &devices);
if (ACPI_FAILURE(status)) {
- printk(KERN_WARNING PREFIX
- "Invalid active%d threshold\n", i);
+ pr_warn(PREFIX "Invalid active%d threshold\n",
+ i);
tz->trips.active[i].flags.valid = 0;
}
else
@@ -505,7 +511,7 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
valid |= tz->trips.active[i].flags.valid;
if (!valid) {
- printk(KERN_WARNING FW_BUG "No valid trip found\n");
+ pr_warn(FW_BUG "No valid trip found\n");
return -ENODEV;
}
return 0;
@@ -515,10 +521,9 @@ static void acpi_thermal_check(void *data)
{
struct acpi_thermal *tz = data;
- if (!tz->tz_enabled) {
- pr_warn("thermal zone is disabled \n");
+ if (!tz->tz_enabled)
return;
- }
+
thermal_zone_device_update(tz->thermal_zone);
}
@@ -570,9 +575,10 @@ static int thermal_set_mode(struct thermal_zone_device *thermal,
*/
if (mode == THERMAL_DEVICE_ENABLED)
enable = 1;
- else if (mode == THERMAL_DEVICE_DISABLED)
+ else if (mode == THERMAL_DEVICE_DISABLED) {
enable = 0;
- else
+ pr_warn("thermal zone will be disabled\n");
+ } else
return -EINVAL;
if (enable != tz->tz_enabled) {
@@ -863,7 +869,7 @@ acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
return acpi_thermal_cooling_device_cb(thermal, cdev, false);
}
-static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
+static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
.bind = acpi_thermal_bind_cooling_device,
.unbind = acpi_thermal_unbind_cooling_device,
.get_temp = thermal_get_temp,
@@ -919,14 +925,10 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
if (result)
return result;
- status = acpi_attach_data(tz->device->handle,
- acpi_bus_private_data_handler,
- tz->thermal_zone);
- if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX
- "Error attaching device data\n");
+ status = acpi_bus_attach_private_data(tz->device->handle,
+ tz->thermal_zone);
+ if (ACPI_FAILURE(status))
return -ENODEV;
- }
tz->tz_enabled = 1;
@@ -941,7 +943,7 @@ static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
thermal_zone_device_unregister(tz->thermal_zone);
tz->thermal_zone = NULL;
- acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
+ acpi_bus_detach_private_data(tz->device->handle);
}
@@ -1065,6 +1067,13 @@ static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
tz->kelvin_offset = 2732;
}
+static void acpi_thermal_check_fn(struct work_struct *work)
+{
+ struct acpi_thermal *tz = container_of(work, struct acpi_thermal,
+ thermal_check_work);
+ acpi_thermal_check(tz);
+}
+
static int acpi_thermal_add(struct acpi_device *device)
{
int result = 0;
@@ -1094,9 +1103,10 @@ static int acpi_thermal_add(struct acpi_device *device)
if (result)
goto free_memory;
- printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
- acpi_device_name(device), acpi_device_bid(device),
- KELVIN_TO_CELSIUS(tz->temperature));
+ INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn);
+
+ pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device),
+ acpi_device_bid(device), KELVIN_TO_CELSIUS(tz->temperature));
goto end;
free_memory:
@@ -1112,6 +1122,7 @@ static int acpi_thermal_remove(struct acpi_device *device)
if (!device || !acpi_driver_data(device))
return -EINVAL;
+ flush_workqueue(acpi_thermal_pm_queue);
tz = acpi_driver_data(device);
acpi_thermal_unregister_thermal_zone(tz);
@@ -1120,6 +1131,13 @@ static int acpi_thermal_remove(struct acpi_device *device)
}
#ifdef CONFIG_PM_SLEEP
+static int acpi_thermal_suspend(struct device *dev)
+{
+ /* Make sure the previously queued thermal check work has been done */
+ flush_workqueue(acpi_thermal_pm_queue);
+ return 0;
+}
+
static int acpi_thermal_resume(struct device *dev)
{
struct acpi_thermal *tz;
@@ -1150,7 +1168,7 @@ static int acpi_thermal_resume(struct device *dev)
tz->state.active |= tz->trips.active[i].flags.enabled;
}
- acpi_thermal_check(tz);
+ queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work);
return AE_OK;
}
@@ -1159,24 +1177,24 @@ static int acpi_thermal_resume(struct device *dev)
static int thermal_act(const struct dmi_system_id *d) {
if (act == 0) {
- printk(KERN_NOTICE "ACPI: %s detected: "
- "disabling all active thermal trip points\n", d->ident);
+ pr_notice(PREFIX "%s detected: "
+ "disabling all active thermal trip points\n", d->ident);
act = -1;
}
return 0;
}
static int thermal_nocrt(const struct dmi_system_id *d) {
- printk(KERN_NOTICE "ACPI: %s detected: "
- "disabling all critical thermal trip point actions.\n", d->ident);
+ pr_notice(PREFIX "%s detected: "
+ "disabling all critical thermal trip point actions.\n", d->ident);
nocrt = 1;
return 0;
}
static int thermal_tzp(const struct dmi_system_id *d) {
if (tzp == 0) {
- printk(KERN_NOTICE "ACPI: %s detected: "
- "enabling thermal zone polling\n", d->ident);
+ pr_notice(PREFIX "%s detected: "
+ "enabling thermal zone polling\n", d->ident);
tzp = 300; /* 300 dS = 30 Seconds */
}
return 0;
@@ -1184,8 +1202,8 @@ static int thermal_tzp(const struct dmi_system_id *d) {
static int thermal_psv(const struct dmi_system_id *d) {
if (psv == 0) {
- printk(KERN_NOTICE "ACPI: %s detected: "
- "disabling all passive thermal trip points\n", d->ident);
+ pr_notice(PREFIX "%s detected: "
+ "disabling all passive thermal trip points\n", d->ident);
psv = -1;
}
return 0;
@@ -1238,21 +1256,27 @@ static int __init acpi_thermal_init(void)
dmi_check_system(thermal_dmi_table);
if (off) {
- printk(KERN_NOTICE "ACPI: thermal control disabled\n");
+ pr_notice(PREFIX "thermal control disabled\n");
return -ENODEV;
}
+ acpi_thermal_pm_queue = create_workqueue("acpi_thermal_pm");
+ if (!acpi_thermal_pm_queue)
+ return -ENODEV;
+
result = acpi_bus_register_driver(&acpi_thermal_driver);
- if (result < 0)
+ if (result < 0) {
+ destroy_workqueue(acpi_thermal_pm_queue);
return -ENODEV;
+ }
return 0;
}
static void __exit acpi_thermal_exit(void)
{
-
acpi_bus_unregister_driver(&acpi_thermal_driver);
+ destroy_workqueue(acpi_thermal_pm_queue);
return;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 00:52:54 +0000