ACPI: thermal: create "thermal.off=1" to disable ACPI thermal support
"thermal.off=1" disables all ACPI thermal support at boot time.
CONFIG_ACPI_THERMAL=n can do this at build time.
"# rmmod thermal" can do this at run time,
as long as thermal is built as a module.
WARNING: On some systems, disabling ACPI thermal support
will cause the system to run hotter and reduce the
lifetime of the hardware.
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5a62de1..61337d9 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -78,6 +78,10 @@
module_param(tzp, int, 0);
MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
+static int off;
+module_param(off, int, 0);
+MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n");
+
static int acpi_thermal_add(struct acpi_device *device);
static int acpi_thermal_remove(struct acpi_device *device, int type);
static int acpi_thermal_resume(struct acpi_device *device);
@@ -1285,7 +1289,10 @@
{
int result = 0;
-
+ if (off) {
+ printk(KERN_NOTICE "ACPI: thermal control disabled\n");
+ return -ENODEV;
+ }
acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
if (!acpi_thermal_dir)
return -ENODEV;