Hi Rob
> > We already have of_graph_get_next_endpoint(), but it is not
> > intuitive to use in some case.
>
> Can of_graph_get_next_endpoint() users be replaced with your new
> helpers? I'd really like to get rid of the 3 remaining users.
Hmm...
of_graph_get_next_endpoint() will fetch "endpoint" beyond the "port",
but new helper doesn't have such feature.
Even though I try to replace it with new helper, I guess it will be
almost same as current of_graph_get_next_endpoint() anyway.
Alternative idea is...
One of the big user of of_graph_get_next_endpoint() is
for_each_endpoint_of_node() loop.
So we can replace it to..
- for_each_endpoint_of_node(parent, endpoint) {
+ for_each_of_graph_port(parent, port) {
+ for_each_of_graph_port_endpoint(port, endpoint) {
Above is possible, but it replaces single loop to multi loops.
And, we still need to consider about of_fwnode_graph_get_next_endpoint()
which is the last user of of_graph_get_next_endpoint()
> > +struct device_node *of_graph_get_next_port_endpoint(const struct device_node *port,
> > + struct device_node *prev)
> > +{
> > + do {
> > + prev = of_get_next_child(port, prev);
> > + if (!prev)
> > + break;
> > + } while (!of_node_name_eq(prev, "endpoint"));
>
> Really, this check is validation as no other name is valid in a
> port node. The kernel is not responsible for validation, but okay.
> However, if we are going to keep this, might as well make it WARN().
OK, will do in v4
> > +/**
> > + * for_each_of_graph_port_endpoint - iterate over every endpoint in a port node
> > + * @parent: parent port node
> > + * @child: loop variable pointing to the current endpoint node
> > + *
> > + * When breaking out of the loop, of_node_put(child) has to be called manually.
>
> No need for this requirement anymore. Use cleanup.h so this is
> automatic.
Do you mean it should include __free() inside this loop, like _scoped() ?
#define for_each_child_of_node_scoped(parent, child) \
for (struct device_node *child __free(device_node) = \
of_get_next_child(parent, NULL); \
child != NULL; \
child = of_get_next_child(parent, child))
In such case, I wonder does it need to have _scoped() in loop name ?
And in such case, I think we want to have non _scoped() loop too ?
For example, when user want to use the param.
for_each_of_graph_port_endpoint(port, endpoint)
if (xxx == yyy)
return endpoint;
for_each_of_graph_port_endpoint_scoped(port, endpoint)
if (xxx == yyy)
return of_node_get(endpoint)
Thank you for your help !!
Best regards
---
Kuninori Morimoto
