diff options
| -rw-r--r-- | drivers/acpi/utils.c | 25 | ||||
| -rw-r--r-- | include/acpi/acpi_bus.h | 1 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index 804ac0df58ec..838b719ec7ce 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -606,6 +606,31 @@ acpi_status acpi_evaluate_lck(acpi_handle handle, int lock) } /** + * acpi_evaluate_reg: Evaluate _REG method to register OpRegion presence + * @handle: ACPI device handle + * @space_id: ACPI address space id to register OpRegion presence for + * @function: Parameter to pass to _REG one of ACPI_REG_CONNECT or + * ACPI_REG_DISCONNECT + * + * Evaluate device's _REG method to register OpRegion presence. + */ +acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function) +{ + struct acpi_object_list arg_list; + union acpi_object params[2]; + + params[0].type = ACPI_TYPE_INTEGER; + params[0].integer.value = space_id; + params[1].type = ACPI_TYPE_INTEGER; + params[1].integer.value = function; + arg_list.count = 2; + arg_list.pointer = params; + + return acpi_evaluate_object(handle, "_REG", &arg_list, NULL); +} +EXPORT_SYMBOL(acpi_evaluate_reg); + +/** * acpi_evaluate_dsm - evaluate device's _DSM method * @handle: ACPI device handle * @guid: GUID of requested functions, should be 16 bytes diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index a92bea7184a8..5afb6ceb284f 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -44,6 +44,7 @@ acpi_status acpi_execute_simple_method(acpi_handle handle, char *method, u64 arg); acpi_status acpi_evaluate_ej0(acpi_handle handle); acpi_status acpi_evaluate_lck(acpi_handle handle, int lock); +acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function); bool acpi_ata_match(acpi_handle handle); bool acpi_bay_match(acpi_handle handle); bool acpi_dock_match(acpi_handle handle); |