| Message ID | 20201130133129.1024662-3-djrscally@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add functionality to ipu3-cio2 driver allowing software_node connections to sensors on platforms designed for Windows | expand |
On 30/11/2020 17:29, Andy Shevchenko wrote: > On Mon, Nov 30, 2020 at 01:31:13PM +0000, Daniel Scally wrote: >> 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. > > One nit below, after addressing: > Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > > ... > >> + 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; > > Can we, please, do > > if (best_ep) > return best_ep; > > if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary)) > return fwnode_graph_get_endpoint_by_id(fwnode->secondary, port, > endpoint, flags); > > return NULL; > > ? > > This 'if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary))' becomes kinda > idiomatic to the cases when we need to proceed primary followed by the > secondary in cases where it's not already done. Thanks - I made this change too
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);
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(+)