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: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 3521c37bbd3390c3a74e7c5fa2efb77eb5ffb4ee..1e06159fd9c4a529435615646aedce6c77c0fa96 100644 (file)
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -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;