diff options
| author | Len Brown <len.brown@intel.com> | 2007-08-12 00:12:17 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-08-12 00:12:17 -0400 |
| commit | 72b33ef8bb1ac7f6c5a16d23304ab25ddc73d93d (patch) | |
| tree | 2f5b2860984f4e0a903298c527ea69faed8c9a05 | |
| parent | 3864e8ccbba1dcdea87398ab80fdc8ae0fab7c45 (diff) | |
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>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 3 | ||||
| -rw-r--r-- | drivers/acpi/thermal.c | 9 |
2 files changed, 11 insertions, 1 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index a326487a3ab..de3300c9056 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1820,6 +1820,9 @@ and is between 256 and 4096 characters. It is defined in the file thash_entries= [KNL,NET] 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 [deprecated, see 'printk.time'] diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 5a62de1b7f2..61337d969d7 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -78,6 +78,10 @@ static int tzp; 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 @@ static int __init acpi_thermal_init(void) { 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; |