+/*******************************************************************************
+ *
+ * FUNCTION: acpi_set_gpe
+ *
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
+ * gpe_number - GPE level within the GPE block
+ * action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
+ * the reference count mechanism used in the acpi_enable_gpe(),
+ * acpi_disable_gpe() interfaces.
+ * This API is typically used by the GPE raw handler mode driver
+ * to switch between the polling mode and the interrupt mode after
+ * the driver has enabled the GPE.
+ * The APIs should be invoked in this order:
+ * acpi_enable_gpe() <- Ensure the reference count > 0
+ * acpi_set_gpe(ACPI_GPE_DISABLE) <- Enter polling mode
+ * acpi_set_gpe(ACPI_GPE_ENABLE) <- Leave polling mode
+ * acpi_disable_gpe() <- Decrease the reference count
+ *
+ * Note: If a GPE is shared by 2 silicon components, then both the drivers
+ * should support GPE polling mode or disabling the GPE for long period
+ * for one driver may break the other. So use it with care since all
+ * firmware _Lxx/_Exx handlers currently rely on the GPE interrupt mode.
+ *
+ ******************************************************************************/
+acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
+{
+ struct acpi_gpe_event_info *gpe_event_info;
+ acpi_status status;
+ acpi_cpu_flags flags;
+
+ ACPI_FUNCTION_TRACE(acpi_set_gpe);
+
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+ /* Ensure that we have a valid GPE number */
+
+ gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+ if (!gpe_event_info) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Perform the action */
+
+ switch (action) {
+ case ACPI_GPE_ENABLE:
+
+ status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
+ break;
+
+ case ACPI_GPE_DISABLE:
+
+ status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
+ break;
+
+ default:
+
+ status = AE_BAD_PARAMETER;
+ break;
+ }
+
+unlock_and_exit:
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_set_gpe)