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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>
This commit is contained in:
Len Brown 2007-08-12 00:12:17 -04:00
parent 3864e8ccbb
commit 72b33ef8bb
2 changed files with 11 additions and 1 deletions
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3
Documentation/kernel-parameters.txt
View File

@ -1820,6 +1820,9 @@ and is between 256 and 4096 characters. It is defined in the file
thash_entries= [KNL,NET] thash_entries= [KNL,NET]
Set number of hash buckets for TCP connection Set number of hash buckets for TCP connection
thermal.off= [HW,ACPI]
1: disable ACPI thermal control
time Show timing data prefixed to each printk message line time Show timing data prefixed to each printk message line
[deprecated, see 'printk.time'] [deprecated, see 'printk.time']

9
drivers/acpi/thermal.c
View File

@ -78,6 +78,10 @@ static int tzp;
module_param(tzp, int, 0); module_param(tzp, int, 0);
MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); 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_add(struct acpi_device *device);
static int acpi_thermal_remove(struct acpi_device *device, int type); static int acpi_thermal_remove(struct acpi_device *device, int type);
static int acpi_thermal_resume(struct acpi_device *device); static int acpi_thermal_resume(struct acpi_device *device);
@ -1285,7 +1289,10 @@ static int __init acpi_thermal_init(void)
{ {
int result = 0; 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); acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
if (!acpi_thermal_dir) if (!acpi_thermal_dir)
return -ENODEV; return -ENODEV;