On Tue, Sep 16, 2014 at 02:52:33PM +0300, Mika Westerberg wrote: > From: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx> > > Add a uniform interface by which device drivers can request device > properties from the platform firmware by providing a property name > and the corresponding data type. The purpose of it is to help to > write portable code that won't depend on any particular platform > firmware interface. > > Three general helper functions, device_get_property(), > device_read_property() and device_read_property_array() are provided. > The first one allows the raw value of a given device property to be > accessed by the driver. The remaining two allow the value of a numeric > or string property and multiple numeric or string values of one array > property to be acquired, respectively. Static inline wrappers are also > provided for the various property data types that can be passed to > device_read_property() or device_read_property_array() for extra type > checking. > > In addition to that new generic routines are provided for retrieving > properties from device description objects in the platform firmware > in case there are no struct device objects for them (either those > objects have not been created yet or they do not exist at all). > Again, three functions are provided, dev_node_get_property(), > dev_node_read_property(), dev_node_read_property_array(), in analogy > with device_get_property(), device_read_property() and > device_read_property_array() described above, respectively, along > with static inline wrappers for all of the propery data types that > can be used. For all of them, the first argument is a pointer to > struct fw_dev_node (new type) that in turn contains exactly one > valid pointer to a device description object (depending on what > platform firmware interface is in use). > > Finally, device_for_each_child_node() is added for iterating over > the children of the device description object associated with the > given device. > > The interface covers both ACPI and Device Trees. > > This change set includes material from Mika Westerberg and Aaron Lu. > > Signed-off-by: Aaron Lu <aaron.lu@xxxxxxxxx> > Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Looks good to me, feel free to take this through your tree with my: Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
