ACPI_FREE(out_obj);
}
+/**
+ * acpi_get_lps0_constraint - Get the LPS0 constraint for a device.
+ * @adev: Device to get the constraint for.
+ *
+ * The LPS0 constraint is the shallowest (minimum) power state in which the
+ * device can be so as to allow the platform as a whole to achieve additional
+ * energy conservation by utilizing a system-wide low-power state.
+ *
+ * Returns:
+ * - ACPI power state value of the constraint for @adev on success.
+ * - Otherwise, ACPI_STATE_UNKNOWN.
+ */
+int acpi_get_lps0_constraint(struct acpi_device *adev)
+{
+ struct lpi_constraints *entry;
+
+ for_each_lpi_constraint(entry) {
+ if (adev->handle == entry->handle)
+ return entry->min_dstate;
+ }
+
+ return ACPI_STATE_UNKNOWN;
+}
+
static void lpi_check_constraints(void)
{
struct lpi_constraints *entry;
};
int acpi_register_lps0_dev(struct acpi_s2idle_dev_ops *arg);
void acpi_unregister_lps0_dev(struct acpi_s2idle_dev_ops *arg);
+int acpi_get_lps0_constraint(struct acpi_device *adev);
+#else /* CONFIG_SUSPEND && CONFIG_X86 */
+static inline int acpi_get_lps0_constraint(struct device *dev)
+{
+ return ACPI_STATE_UNKNOWN;
+}
#endif /* CONFIG_SUSPEND && CONFIG_X86 */
#ifndef CONFIG_IA64
void arch_reserve_mem_area(acpi_physical_address addr, size_t size);