Messages in this thread Patch in this message | | | Date | Wed, 4 Nov 2020 15:23:50 -0800 | Subject | [PATCH v1 13/18] driver core: Add fwnode_get_next_parent_dev() helper function | From | Saravana Kannan <> |
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Given a fwnode, this function finds the closest ancestor fwnode that has a corresponding struct device. The function returns this struct device. This function will be used in a subsequent patch in this series.
Signed-off-by: Saravana Kannan <saravanak@google.com> --- drivers/base/core.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/drivers/base/core.c b/drivers/base/core.c index ee28d8c7ee85..4ae5f2885ac5 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1562,6 +1562,31 @@ static void fw_devlink_parse_fwtree(struct fwnode_handle *fwnode) fw_devlink_parse_fwtree(child); } +/** + * fwnode_get_next_parent_dev - Find device of closest ancestor fwnode + * @fwnode: firmware node + * + * Given a firmware node (@fwnode), this function finds its closest ancestor + * firmware node that has a corresponding struct device and returns that struct + * device. + * + * The caller of this function is expected to call put_device() on the returned + * device when they are done. + */ +static struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode) +{ + struct device *dev = NULL; + + fwnode_handle_get(fwnode); + do { + fwnode = fwnode_get_next_parent(fwnode); + if (fwnode) + dev = get_dev_from_fwnode(fwnode); + } while (fwnode && !dev); + fwnode_handle_put(fwnode); + return dev; +} + static void fw_devlink_link_device(struct device *dev) { int fw_ret; -- 2.29.1.341.ge80a0c044ae-goog
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