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Commit 72b33ef8 authored by Len Brown's avatar Len Brown
Browse files

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: default avatarLen Brown <len.brown@intel.com>
parent 3864e8cc

Documentation/kernel-parameters.txt

+3 −0
Original line number Diff line number Diff line
@@ -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']

drivers/acpi/thermal.c

+8 −1
Original line number Diff line number Diff line
@@ -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;