diff options
Diffstat (limited to 'drivers/acpi/acpica/evgpe.c')
| -rw-r--r-- | drivers/acpi/acpica/evgpe.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c index 4b4949ce05bc..bdb10bee13ce 100644 --- a/drivers/acpi/acpica/evgpe.c +++ b/drivers/acpi/acpica/evgpe.c @@ -130,6 +130,60 @@ acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info) /******************************************************************************* * + * FUNCTION: acpi_ev_mask_gpe + * + * PARAMETERS: gpe_event_info - GPE to be blocked/unblocked + * is_masked - Whether the GPE is masked or not + * + * RETURN: Status + * + * DESCRIPTION: Unconditionally mask/unmask a GPE during runtime. + * + ******************************************************************************/ + +acpi_status +acpi_ev_mask_gpe(struct acpi_gpe_event_info *gpe_event_info, u8 is_masked) +{ + struct acpi_gpe_register_info *gpe_register_info; + u32 register_bit; + + ACPI_FUNCTION_TRACE(ev_mask_gpe); + + gpe_register_info = gpe_event_info->register_info; + if (!gpe_register_info) { + return_ACPI_STATUS(AE_NOT_EXIST); + } + + register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); + + /* Perform the action */ + + if (is_masked) { + if (register_bit & gpe_register_info->mask_for_run) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + (void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE); + ACPI_SET_BIT(gpe_register_info->mask_for_run, (u8)register_bit); + } else { + if (!(register_bit & gpe_register_info->mask_for_run)) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + ACPI_CLEAR_BIT(gpe_register_info->mask_for_run, + (u8)register_bit); + if (gpe_event_info->runtime_count + && !gpe_event_info->disable_for_dispatch) { + (void)acpi_hw_low_set_gpe(gpe_event_info, + ACPI_GPE_ENABLE); + } + } + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * * FUNCTION: acpi_ev_add_gpe_reference * * PARAMETERS: gpe_event_info - Add a reference to this GPE @@ -674,6 +728,7 @@ acpi_status acpi_ev_finish_gpe(struct acpi_gpe_event_info *gpe_event_info) * in the event_info. */ (void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_CONDITIONAL_ENABLE); + gpe_event_info->disable_for_dispatch = FALSE; return (AE_OK); } @@ -737,6 +792,8 @@ acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device, } } + gpe_event_info->disable_for_dispatch = TRUE; + /* * Dispatch the GPE to either an installed handler or the control * method associated with this GPE (_Lxx or _Exx). If a handler |