diff options
Diffstat (limited to 'src/include/acpi')
| -rw-r--r-- | src/include/acpi/acpigen_dptf.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/include/acpi/acpigen_dptf.h b/src/include/acpi/acpigen_dptf.h index a082b62fd9..214578a4c1 100644 --- a/src/include/acpi/acpigen_dptf.h +++ b/src/include/acpi/acpigen_dptf.h @@ -27,6 +27,7 @@ enum { /* A device can only define _AC0 .. _AC9 i.e. between 0 and 10 Active Cooling Methods */ DPTF_MAX_ACX = 10, DPTF_MAX_ACTIVE_POLICIES = (DPTF_PARTICIPANT_COUNT-1), + DPTF_MAX_PASSIVE_POLICIES = (DPTF_PARTICIPANT_COUNT-1), }; /* Active Policy */ @@ -44,6 +45,20 @@ struct dptf_active_policy { } thresholds[DPTF_MAX_ACX]; }; +/* Passive Policy */ +struct dptf_passive_policy { + /* The device that can be throttled */ + enum dptf_participant source; + /* The device that controls the throttling */ + enum dptf_participant target; + /* How often to check the temperature for required throttling (ms) */ + uint16_t period; + /* The trip point for turning on throttling (degrees C) */ + uint8_t temp; + /* Relative priority between Policies */ + uint8_t priority; +}; + /* * This function provides tables of temperature and corresponding fan or percent. When the * temperature thresholds are met (_AC0 - _AC9), the fan is driven to corresponding percentage @@ -51,6 +66,14 @@ struct dptf_active_policy { */ void dptf_write_active_policies(const struct dptf_active_policy *policies, int max_count); +/* + * This function uses the definition of the passive policies to write out _PSV Methods on all + * participants that define it. It also writes out the Thermal Relationship Table + * (\_SB.DPTF._TRT), which describes various passive (i.e., throttling) policies that can be + * applies when temperature sensors reach the _PSV threshold. + */ +void dptf_write_passive_policies(const struct dptf_passive_policy *policies, int max_count); + /* Helper method to open the scope for a given participant. */ void dptf_write_scope(enum dptf_participant participant); |