| From | Daniel Scally <> | Subject | [PATCH 02/18] property: Add support for calling fwnode_graph_get_endpoint_by_id() for fwnode->secondary | Date | Mon, 30 Nov 2020 13:31:13 +0000 |
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This function is used to find fwnode endpoints against a device. In some instances those endpoints are software nodes which are children of fwnode->secondary. Add support to fwnode_graph_get_endpoint_by_id() to find those endpoints by recursively calling itself passing the ptr to fwnode->secondary in the event no endpoint is found for the primary.
Signed-off-by: Daniel Scally <djrscally@gmail.com> --- Changes since RFC v3:
Patch introduced. In discussion in the last submission I noted that the CIO2 device doesn't have an ACPI fwnode - that turns out to be true for _some_ devices but not others, so we need this function to check the secondary too.
drivers/base/property.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/base/property.c b/drivers/base/property.c index a5ca2306796f..4ece6b086e36 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1162,6 +1162,10 @@ fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode, best_ep_id = fwnode_ep.id; } + if (!best_ep && fwnode && !IS_ERR_OR_NULL(fwnode->secondary)) + return fwnode_graph_get_endpoint_by_id(fwnode->secondary, port, + endpoint, flags); + return best_ep; } EXPORT_SYMBOL_GPL(fwnode_graph_get_endpoint_by_id); -- 2.25.1
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