diff options
| -rw-r--r-- | drivers/acpi/thermal.c | 130 |
1 files changed, 66 insertions, 64 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 312730f8272e..fe64347ff925 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -43,17 +43,13 @@ #define ACPI_THERMAL_MAX_ACTIVE 10 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 -#define ACPI_TRIPS_CRITICAL BIT(0) -#define ACPI_TRIPS_HOT BIT(1) -#define ACPI_TRIPS_PASSIVE BIT(2) -#define ACPI_TRIPS_ACTIVE BIT(3) -#define ACPI_TRIPS_DEVICES BIT(4) +#define ACPI_TRIPS_PASSIVE BIT(0) +#define ACPI_TRIPS_ACTIVE BIT(1) +#define ACPI_TRIPS_DEVICES BIT(2) #define ACPI_TRIPS_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) -#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ - ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ - ACPI_TRIPS_DEVICES) +#define ACPI_TRIPS_INIT (ACPI_TRIPS_THRESHOLDS | ACPI_TRIPS_DEVICES) /* * This exception is thrown out in two cases: @@ -196,62 +192,6 @@ static void __acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) bool valid = false; int i; - /* Critical Shutdown */ - if (flag & ACPI_TRIPS_CRITICAL) { - status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, &tmp); - tz->trips.critical.temperature = tmp; - /* - * Treat freezing temperatures as invalid as well; some - * BIOSes return really low values and cause reboots at startup. - * Below zero (Celsius) values clearly aren't right for sure.. - * ... so lets discard those as invalid. - */ - if (ACPI_FAILURE(status)) { - tz->trips.critical.valid = false; - acpi_handle_debug(tz->device->handle, - "No critical threshold\n"); - } else if (tmp <= 2732) { - pr_info(FW_BUG "Invalid critical threshold (%llu)\n", tmp); - tz->trips.critical.valid = false; - } else { - tz->trips.critical.valid = true; - acpi_handle_debug(tz->device->handle, - "Found critical threshold [%lu]\n", - tz->trips.critical.temperature); - } - if (tz->trips.critical.valid) { - if (crt == -1) { - tz->trips.critical.valid = false; - } else if (crt > 0) { - unsigned long crt_k = celsius_to_deci_kelvin(crt); - - /* - * Allow override critical threshold - */ - if (crt_k > tz->trips.critical.temperature) - pr_info("Critical threshold %d C\n", crt); - - tz->trips.critical.temperature = crt_k; - } - } - } - - /* Critical Sleep (optional) */ - if (flag & ACPI_TRIPS_HOT) { - status = acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, &tmp); - if (ACPI_FAILURE(status)) { - tz->trips.hot.valid = false; - acpi_handle_debug(tz->device->handle, - "No hot threshold\n"); - } else { - tz->trips.hot.temperature = tmp; - tz->trips.hot.valid = true; - acpi_handle_debug(tz->device->handle, - "Found hot threshold [%lu]\n", - tz->trips.hot.temperature); - } - } - /* Passive (optional) */ if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.trip.valid) || flag == ACPI_TRIPS_INIT) { @@ -451,11 +391,73 @@ static void acpi_thermal_trips_update(struct acpi_thermal *tz, u32 event) dev_name(&adev->dev), event, 0); } +static void acpi_thermal_get_critical_trip(struct acpi_thermal *tz) +{ + unsigned long long tmp; + acpi_status status; + + if (crt > 0) { + tmp = celsius_to_deci_kelvin(crt); + goto set; + } + if (crt == -1) { + acpi_handle_debug(tz->device->handle, "Critical threshold disabled\n"); + goto fail; + } + + status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, &tmp); + if (ACPI_FAILURE(status)) { + acpi_handle_debug(tz->device->handle, "No critical threshold\n"); + goto fail; + } + if (tmp <= 2732) { + /* + * Below zero (Celsius) values clearly aren't right for sure, + * so discard them as invalid. + */ + pr_info(FW_BUG "Invalid critical threshold (%llu)\n", tmp); + goto fail; + } + +set: + tz->trips.critical.valid = true; + tz->trips.critical.temperature = tmp; + acpi_handle_debug(tz->device->handle, "Critical threshold [%lu]\n", + tz->trips.critical.temperature); + return; + +fail: + tz->trips.critical.valid = false; + tz->trips.critical.temperature = THERMAL_TEMP_INVALID; +} + +static void acpi_thermal_get_hot_trip(struct acpi_thermal *tz) +{ + unsigned long long tmp; + acpi_status status; + + status = acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, &tmp); + if (ACPI_FAILURE(status)) { + tz->trips.hot.valid = false; + tz->trips.hot.temperature = THERMAL_TEMP_INVALID; + acpi_handle_debug(tz->device->handle, "No hot threshold\n"); + return; + } + + tz->trips.hot.valid = true; + tz->trips.hot.temperature = tmp; + acpi_handle_debug(tz->device->handle, "Hot threshold [%lu]\n", + tz->trips.hot.temperature); +} + static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) { bool valid; int i; + acpi_thermal_get_critical_trip(tz); + acpi_thermal_get_hot_trip(tz); + /* Passive and active trip points (optional). */ __acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); valid = tz->trips.critical.valid | |