Re: [PATCH v5 09/12] Driver core: Unified interface for firmware node properties

Greg Kroah-Hartman
2014-10-19T22:14:34Z

On Fri, Oct 17, 2014 at 02:14:53PM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>
> Add 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).
>
> The following functions are provided:
>
> fwnode_property_present()
> fwnode_property_read_u8()
> fwnode_property_read_u16()
> fwnode_property_read_u32()
> fwnode_property_read_u64()
> fwnode_property_read_string()
> fwnode_property_read_u8_array()
> fwnode_property_read_u16_array()
> fwnode_property_read_u32_array()
> fwnode_property_read_u64_array()
> fwnode_property_read_string_array()
>
> in analogy with the corresponding functions for struct device added
> previously. For all of them, the first argument is a pointer to struct
> fwnode_handle (new type) that allows a device description object
> (depending on what platform firmware interface is in use) to be
> obtained.
>
> Add a new macro device_for_each_child_node() for iterating over the
> children of the device description object associated with a given
> device and a new function device_get_child_node_count() returning the
> number of a given device's child nodes.
>
> The interface covers both ACPI and Device Trees.
>
> Suggested-by: Grant Likely <grant.likely@linaro.org>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>