Commit 0b5bfa1c authored by Len Brown's avatar Len Brown
Browse files

ACPI: thermal: add DMI hooks to handle AOpen's broken Award BIOS

Use DMI to:
1. enable polling (BIOS thermal events are broken)
2. disable active trip points (BIOS fan control is broken)
3. disable passive trip point (BIOS hard-codes it too low)

The actual temperature reading does work,
and with the aid of polling, the critical
trip point should work too.

http://bugzilla.kernel.org/show_bug.cgi?id=8842

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent f8707ec9
......@@ -33,6 +33,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
......@@ -1328,10 +1329,74 @@ static int acpi_thermal_resume(struct acpi_device *device)
return AE_OK;
}
#ifdef CONFIG_DMI
static int thermal_act(struct dmi_system_id *d) {
if (act == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
"disabling all active thermal trip points\n", d->ident);
act = -1;
}
return 0;
}
static int thermal_tzp(struct dmi_system_id *d) {
if (tzp == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
"enabling thermal zone polling\n", d->ident);
tzp = 300; /* 300 dS = 30 Seconds */
}
return 0;
}
static int thermal_psv(struct dmi_system_id *d) {
if (psv == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
"disabling all passive thermal trip points\n", d->ident);
psv = -1;
}
return 0;
}
static struct dmi_system_id thermal_dmi_table[] __initdata = {
/*
* Award BIOS on this AOpen makes thermal control almost worthless.
* http://bugzilla.kernel.org/show_bug.cgi?id=8842
*/
{
.callback = thermal_act,
.ident = "AOpen i915GMm-HFS",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
},
},
{
.callback = thermal_psv,
.ident = "AOpen i915GMm-HFS",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
},
},
{
.callback = thermal_tzp,
.ident = "AOpen i915GMm-HFS",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
},
},
{}
};
#endif /* CONFIG_DMI */
static int __init acpi_thermal_init(void)
{
int result = 0;
dmi_check_system(thermal_dmi_table);
if (off) {
printk(KERN_NOTICE "ACPI: thermal control disabled\n");
return -ENODEV;
......
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