[PATCH v3 2/9] of: property: add of_graph_get_next_port_endpoint()

[Rob Herring]

On Tue, Aug 27, 2024 at 5:47 AM Sakari Ailus <sakari.ailus at iki.fi> wrote:
>
> Rob, Kunimori-san,
>
> On Mon, Aug 26, 2024 at 10:40:09AM -0500, Rob Herring wrote:
> > On Mon, Aug 26, 2024 at 02:43:28AM +0000, Kuninori Morimoto wrote:
> > > 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.
>
> The fwnode graph API has fwnode_graph_get_endpoint_by_id() which can also
> be used to obtain endpoints within a port. It does the same than
> of_graph_get_endpoint_by_regs() with the addition that it also has a
> flags field to allow e.g. returning endpoints with regs higher than
> requested (FWNODE_GRAPH_ENDPOINT_NEXT).

Looks to me like FWNODE_GRAPH_ENDPOINT_NEXT is always used with
endpoint #0. That's equivalent to passing -1 for the endpoint number
with the OF API.

> Most users dealing with endpoints on fwnode property API use this, could
> something like this be done on OF as well? Probably a similar flag would be
> needed though.

I had fixed almost all the OF cases at one point. Unfortunately, there
were a few corner cases that I didn't address to eliminate the API. So
now it has proliferated with the fwnode API.

Rob