Merge tag 'driver-core-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-block.git] / drivers / base / power / domain.c

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 946da9bddcb8878af3cb3460e3d3ee7b331896da..4b5714199490802d626df3c34952925be0ee6e77 100644 (file)
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2374,6 +2374,30 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(genpd_dev_pm_attach_by_id);
 
+/**
+ * genpd_dev_pm_attach_by_name - Associate a device with one of its PM domains.
+ * @dev: The device used to lookup the PM domain.
+ * @name: The name of the PM domain.
+ *
+ * Parse device's OF node to find a PM domain specifier using the
+ * power-domain-names DT property. For further description see
+ * genpd_dev_pm_attach_by_id().
+ */
+struct device *genpd_dev_pm_attach_by_name(struct device *dev, char *name)
+{
+       int index;
+
+       if (!dev->of_node)
+               return NULL;
+
+       index = of_property_match_string(dev->of_node, "power-domain-names",
+                                        name);
+       if (index < 0)
+               return NULL;
+
+       return genpd_dev_pm_attach_by_id(dev, index);
+}
+
 static const struct of_device_id idle_state_match[] = {
        { .compatible = "domain-idle-state", },
        { }