of: Add standard property for poweroff capability
authorRomain Perier <romain.perier@gmail.com>
Tue, 14 Oct 2014 06:31:09 +0000 (06:31 +0000)
committerMark Brown <broonie@kernel.org>
Wed, 22 Oct 2014 15:59:36 +0000 (16:59 +0100)
Several drivers create their own devicetree property when they register
poweroff capabilities. This is for example the case for mfd, regulator
or power drivers which define "vendor,system-power-controller" property.
This patch adds support for a standard property "poweroff-source"
which marks the device as able to shutdown the system.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
include/linux/of.h

index 6545e7aec7bb95dc41ad6225050cb19e7038287a..27b3ba1e9e59b3dc5cbeb126a3eb641f78c81641 100644 (file)
@@ -866,4 +866,15 @@ static inline int of_changeset_update_property(struct of_changeset *ocs,
 /* CONFIG_OF_RESOLVE api */
 extern int of_resolve_phandles(struct device_node *tree);
 
+/**
+ * of_system_has_poweroff_source - Tells if poweroff-source is found for device_node
+ * @np: Pointer to the given device_node
+ *
+ * return true if present false otherwise
+ */
+static inline bool of_system_has_poweroff_source(const struct device_node *np)
+{
+       return of_property_read_bool(np, "poweroff-source");
+}
+
 #endif /* _LINUX_OF_H */