diff options
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 | ||||
| -rw-r--r-- | drivers/acpi/thermal.c | 18 |
2 files changed, 16 insertions, 6 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 52e1c2d26a25..4c7d2774d2a4 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1820,6 +1820,10 @@ 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.nocrt= [HW,ACPI] + Set to disable actions on ACPI thermal zone + critical and hot trip points. + thermal.off= [HW,ACPI] 1: disable ACPI thermal control diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 74e25be8abc9..57d05ff44dd1 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -78,6 +78,10 @@ static int tzp; module_param(tzp, int, 0444); MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); +static int nocrt; +module_param(nocrt, int, 0); +MODULE_PARM_DESC(nocrt, "Set to disable action on ACPI thermal zone critical and hot trips.\n"); + static int off; module_param(off, int, 0); MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n"); @@ -442,7 +446,7 @@ static int acpi_thermal_get_devices(struct acpi_thermal *tz) static int acpi_thermal_critical(struct acpi_thermal *tz) { - if (!tz || !tz->trips.critical.flags.valid) + if (!tz || !tz->trips.critical.flags.valid || nocrt) return -EINVAL; if (tz->temperature >= tz->trips.critical.temperature) { @@ -464,7 +468,7 @@ static int acpi_thermal_critical(struct acpi_thermal *tz) static int acpi_thermal_hot(struct acpi_thermal *tz) { - if (!tz || !tz->trips.hot.flags.valid) + if (!tz || !tz->trips.hot.flags.valid || nocrt) return -EINVAL; if (tz->temperature >= tz->trips.hot.temperature) { @@ -839,12 +843,14 @@ static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) goto end; if (tz->trips.critical.flags.valid) - seq_printf(seq, "critical (S5): %ld C\n", - KELVIN_TO_CELSIUS(tz->trips.critical.temperature)); + seq_printf(seq, "critical (S5): %ld C%s", + KELVIN_TO_CELSIUS(tz->trips.critical.temperature), + nocrt ? " <disabled>\n" : "\n"); if (tz->trips.hot.flags.valid) - seq_printf(seq, "hot (S4): %ld C\n", - KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); + seq_printf(seq, "hot (S4): %ld C%s", + KELVIN_TO_CELSIUS(tz->trips.hot.temperature), + nocrt ? " <disabled>\n" : "\n"); if (tz->trips.passive.flags.valid) { seq_printf(seq, |