diff options
| author | Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2019-05-31 17:15:39 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-06-03 10:55:38 +0200 |
| commit | 83b34afb6b79c69f5478a7249451cab858af97d6 (patch) | |
| tree | 25a2f8fb4a1619077fefb0a864d9bb640a939085 /drivers/base/property.c | |
| parent | ee48cef6c3917092eeee230caaa508d0e487c288 (diff) | |
device property: Introduce fwnode_find_reference()
In most cases the references that the drivers look for don't
have any arguments. This introduces a wrapper function for
fwnode_property_get_reference_args() that looks for
references by using only the name and index.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/property.c')
| -rw-r--r-- | drivers/base/property.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index 348b37e64944..81bd01ed4042 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -485,6 +485,30 @@ int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode, EXPORT_SYMBOL_GPL(fwnode_property_get_reference_args); /** + * fwnode_find_reference - Find named reference to a fwnode_handle + * @fwnode: Firmware node where to look for the reference + * @name: The name of the reference + * @index: Index of the reference + * + * @index can be used when the named reference holds a table of references. + * + * Returns pointer to the reference fwnode, or ERR_PTR. Caller is responsible to + * call fwnode_handle_put() on the returned fwnode pointer. + */ +struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode, + const char *name, + unsigned int index) +{ + struct fwnode_reference_args args; + int ret; + + ret = fwnode_property_get_reference_args(fwnode, name, NULL, 0, index, + &args); + return ret ? ERR_PTR(ret) : args.fwnode; +} +EXPORT_SYMBOL_GPL(fwnode_find_reference); + +/** * device_remove_properties - Remove properties from a device object. * @dev: Device whose properties to remove. * |