diff options
| author | Marcin Wojtas <mw@semihalf.com> | 2018-01-18 15:31:41 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-22 18:57:04 +0300 |
| commit | 3395de96ae5998692bd86024d0d5e4dd55cd6cc3 (patch) | |
| tree | c870b2a027636e19c4143a928b3913b86eb52185 /drivers/base | |
| parent | 7c6c57f2ab2c5113844fe187a7c45c4bd76dc671 (diff) | |
| download | linux-3395de96ae5998692bd86024d0d5e4dd55cd6cc3.tar.xz | |
device property: Allow iterating over available child fwnodes
Implement a new helper function fwnode_get_next_available_child_node(),
which enables obtaining next enabled child fwnode, which
works on a similar basis to OF's of_get_next_available_child().
This commit also introduces a macro, thanks to which it is
possible to iterate over the available fwnodes, using the
new function described above.
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/property.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index 1d6c9d99d72f..613ba820f545 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -998,6 +998,32 @@ fwnode_get_next_child_node(const struct fwnode_handle *fwnode, EXPORT_SYMBOL_GPL(fwnode_get_next_child_node); /** + * fwnode_get_next_available_child_node - Return the next + * available child node handle for a node + * @fwnode: Firmware node to find the next child node for. + * @child: Handle to one of the node's child nodes or a %NULL handle. + */ +struct fwnode_handle * +fwnode_get_next_available_child_node(const struct fwnode_handle *fwnode, + struct fwnode_handle *child) +{ + struct fwnode_handle *next_child = child; + + if (!fwnode) + return NULL; + + do { + next_child = fwnode_get_next_child_node(fwnode, next_child); + + if (!next_child || fwnode_device_is_available(next_child)) + break; + } while (next_child); + + return next_child; +} +EXPORT_SYMBOL_GPL(fwnode_get_next_available_child_node); + +/** * device_get_next_child_node - Return the next child node handle for a device * @dev: Device to find the next child node for. * @child: Handle to one of the device's child nodes or a null handle. |