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ACPI: property: Use data node name and reg property for graphs

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Instead of using the port and endpoint properties, rely on the names of
the port and endpoint nodes as well as the reg property, as on DT.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sakari Ailus 2018-07-17 17:19:16 +03:00 committed by Rafael J. Wysocki
parent 6561eb3d3a
commit 18f1e58d15
1 changed files with 42 additions and 9 deletions
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51
drivers/acpi/property.c
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@ -1027,6 +1027,26 @@ struct fwnode_handle *acpi_node_get_parent(const struct fwnode_handle *fwnode)
return NULL;
}
/*
* Return true if the node is an ACPI graph node. Called on either ports
* or endpoints.
*/
static bool is_acpi_graph_node(struct fwnode_handle *fwnode,
const char *str)
{
unsigned int len = strlen(str);
const char *name;
if (!len || !is_acpi_data_node(fwnode))
return false;
name = to_acpi_data_node(fwnode)->name;
return (fwnode_property_present(fwnode, "reg") &&
!strncmp(name, str, len) && name[len] == '@') ||
fwnode_property_present(fwnode, str);
}
/**
* acpi_graph_get_next_endpoint - Get next endpoint ACPI firmware node
* @fwnode: Pointer to the parent firmware node
@ -1045,8 +1065,14 @@ static struct fwnode_handle *acpi_graph_get_next_endpoint(
if (!prev) {
do {
port = fwnode_get_next_child_node(fwnode, port);
/* Ports must have port property */
if (fwnode_property_present(port, "port"))
/*
* The names of the port nodes begin with "port@"
* followed by the number of the port node and they also
* have a "reg" property that also has the number of the
* port node. For compatibility reasons a node is also
* recognised as a port node from the "port" property.
*/
if (is_acpi_graph_node(port, "port"))
break;
} while (port);
} else {
@ -1061,12 +1087,18 @@ static struct fwnode_handle *acpi_graph_get_next_endpoint(
port = fwnode_get_next_child_node(fwnode, port);
if (!port)
break;
if (fwnode_property_present(port, "port"))
if (is_acpi_graph_node(port, "port"))
endpoint = fwnode_get_next_child_node(port, NULL);
}
/* Endpoints must have "endpoint" property */
if (!fwnode_property_present(endpoint, "endpoint"))
/*
* The names of the endpoint nodes begin with "endpoint@" followed by
* the number of the endpoint node and they also have a "reg" property
* that also has the number of the endpoint node. For compatibility
* reasons a node is also recognised as an endpoint node from the
* "endpoint" property.
*/
if (!is_acpi_graph_node(endpoint, "endpoint"))
return NULL;
return endpoint;
@ -1139,8 +1171,7 @@ acpi_graph_get_remote_endpoint(const struct fwnode_handle *__fwnode)
fwnode = acpi_graph_get_child_prop_value(fwnode, "port", port_nr);
return acpi_graph_get_child_prop_value(fwnode, "endpoint",
endpoint_nr);
return acpi_graph_get_child_prop_value(fwnode, "endpoint", endpoint_nr);
}
static bool acpi_fwnode_device_is_available(const struct fwnode_handle *fwnode)
@ -1217,8 +1248,10 @@ static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
endpoint->local_fwnode = fwnode;
fwnode_property_read_u32(port_fwnode, "port", &endpoint->port);
fwnode_property_read_u32(fwnode, "endpoint", &endpoint->id);
if (fwnode_property_read_u32(port_fwnode, "reg", &endpoint->port))
fwnode_property_read_u32(port_fwnode, "port", &endpoint->port);
if (fwnode_property_read_u32(fwnode, "reg", &endpoint->id))
fwnode_property_read_u32(fwnode, "endpoint", &endpoint->id);
return 0;
}