On Monday, March 06, 2017 04:19:27 PM Sakari Ailus wrote:
> Similar to OF endpoints, endpoint type nodes can be also supported on
> ACPI. In order to make it possible for drivers to ignore the matter,
> add a type for fwnode_endpoint and a function to parse them.
>
> On ACPI, find the child node index instead of relying on the "endpoint"
> property.
>
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> ---
> drivers/base/property.c | 36 ++++++++++++++++++++++++++++++++++++
> include/linux/fwnode.h | 6 ++++++
> include/linux/property.h | 3 +++
> 3 files changed, 45 insertions(+)
>
> diff --git a/drivers/base/property.c b/drivers/base/property.c
> index 860e160..b8c1017 100644
> --- a/drivers/base/property.c
> +++ b/drivers/base/property.c
> @@ -1330,3 +1330,39 @@ fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode)
> return endpoint;
> }
> EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_endpoint);
> +
> +/*
That should be /** I gather?
> + * fwnode_graph_parse_endpoint() - parse common endpoint node properties
The parens at the end of the function name above are not necessary.
> + * @node: pointer to endpoint device_node
> + * @endpoint: pointer to the fwnode endpoint data structure
> + *
> + * The caller should hold a reference to @node.
A few words about what the function does, please.
> + */
> +int fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
> + struct fwnode_endpoint *endpoint)
> +{
> + struct fwnode_handle *port_fwnode = fwnode_get_parent(fwnode);
> +
> + memset(endpoint, 0, sizeof(*endpoint));
> +
> + endpoint->local_fwnode = fwnode;
> +
> + if (is_acpi_node(port_fwnode)) {
> + struct fwnode_handle *iter;
> +
> + fwnode_property_read_u32(port_fwnode, "port", &endpoint->port);
> +
> + for (iter = fwnode_get_next_child_node(port_fwnode, NULL);
> + iter != fwnode;
> + iter = fwnode_get_next_child_node(port_fwnode, iter))
> + endpoint->id++;
> + } else {
> + fwnode_property_read_u32(port_fwnode, "reg", &endpoint->port);
> + fwnode_property_read_u32(fwnode, "reg", &endpoint->id);
> + }
> +
> + fwnode_handle_put(port_fwnode);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(fwnode_graph_parse_endpoint);
> diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
> index 8bd28ce..cb60f29 100644
> --- a/include/linux/fwnode.h
> +++ b/include/linux/fwnode.h
> @@ -27,4 +27,10 @@ struct fwnode_handle {
> struct fwnode_handle *secondary;
> };
>
> +struct fwnode_endpoint {
> + unsigned int port;
> + unsigned int id;
> + const struct fwnode_handle *local_fwnode;
> +};
Any kerneldoc?
> +
> #endif
> diff --git a/include/linux/property.h b/include/linux/property.h
> index 0b61ea4..45ef00a 100644
> --- a/include/linux/property.h
> +++ b/include/linux/property.h
> @@ -284,4 +284,7 @@ struct fwnode_handle *fwnode_graph_get_remote_port(
> struct fwnode_handle *fwnode_graph_get_remote_endpoint(
> struct fwnode_handle *fwnode);
>
> +int fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
> + struct fwnode_endpoint *endpoint);
> +
> #endif /* _LINUX_PROPERTY_H_ */
>
Thanks,
Rafael
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