device property: Add fwnode_get_name for returning the name of a node

The fwnode framework did not have means to obtain the name of a node. Add
that now, in form of the fwnode_get_name() function and a corresponding
get_name fwnode op. OF and ACPI support is included.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org> (for OF)
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sakari Ailus 2019-10-03 15:32:12 +03:00 committed by Rafael J. Wysocki
parent 87e5e95db3
commit bc0500c1e4
6 changed files with 58 additions and 0 deletions

View File

@ -1317,6 +1317,31 @@ acpi_fwnode_get_reference_args(const struct fwnode_handle *fwnode,
args_count, args);
}
static const char *acpi_fwnode_get_name(const struct fwnode_handle *fwnode)
{
const struct acpi_device *adev;
struct fwnode_handle *parent;
/* Is this the root node? */
parent = fwnode_get_parent(fwnode);
if (!parent)
return "\\";
fwnode_handle_put(parent);
if (is_acpi_data_node(fwnode)) {
const struct acpi_data_node *dn = to_acpi_data_node(fwnode);
return dn->name;
}
adev = to_acpi_device_node(fwnode);
if (WARN_ON(!adev))
return NULL;
return acpi_device_bid(adev);
}
static struct fwnode_handle *
acpi_fwnode_get_parent(struct fwnode_handle *fwnode)
{
@ -1357,6 +1382,7 @@ acpi_fwnode_device_get_match_data(const struct fwnode_handle *fwnode,
.get_parent = acpi_node_get_parent, \
.get_next_child_node = acpi_get_next_subnode, \
.get_named_child_node = acpi_fwnode_get_named_child_node, \
.get_name = acpi_fwnode_get_name, \
.get_reference_args = acpi_fwnode_get_reference_args, \
.graph_get_next_endpoint = \
acpi_graph_get_next_endpoint, \

View File

@ -556,6 +556,17 @@ int device_add_properties(struct device *dev,
}
EXPORT_SYMBOL_GPL(device_add_properties);
/**
* fwnode_get_name - Return the name of a node
* @fwnode: The firmware node
*
* Returns a pointer to the node name.
*/
const char *fwnode_get_name(const struct fwnode_handle *fwnode)
{
return fwnode_call_ptr_op(fwnode, get_name);
}
/**
* fwnode_get_parent - Return parent firwmare node
* @fwnode: Firmware whose parent is retrieved

View File

@ -515,6 +515,17 @@ static int software_node_read_string_array(const struct fwnode_handle *fwnode,
propname, val, nval);
}
static const char *
software_node_get_name(const struct fwnode_handle *fwnode)
{
const struct swnode *swnode = to_swnode(fwnode);
if (!swnode)
return "(null)";
return kobject_name(&swnode->kobj);
}
static struct fwnode_handle *
software_node_get_parent(const struct fwnode_handle *fwnode)
{
@ -615,6 +626,7 @@ static const struct fwnode_operations software_node_ops = {
.property_present = software_node_property_present,
.property_read_int_array = software_node_read_int_array,
.property_read_string_array = software_node_read_string_array,
.get_name = software_node_get_name,
.get_parent = software_node_get_parent,
.get_next_child_node = software_node_get_next_child,
.get_named_child_node = software_node_get_named_child_node,

View File

@ -872,6 +872,11 @@ of_fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
of_property_count_strings(node, propname);
}
static const char *of_fwnode_get_name(const struct fwnode_handle *fwnode)
{
return kbasename(to_of_node(fwnode)->full_name);
}
static struct fwnode_handle *
of_fwnode_get_parent(const struct fwnode_handle *fwnode)
{
@ -993,6 +998,7 @@ const struct fwnode_operations of_fwnode_ops = {
.property_present = of_fwnode_property_present,
.property_read_int_array = of_fwnode_property_read_int_array,
.property_read_string_array = of_fwnode_property_read_string_array,
.get_name = of_fwnode_get_name,
.get_parent = of_fwnode_get_parent,
.get_next_child_node = of_fwnode_get_next_child_node,
.get_named_child_node = of_fwnode_get_named_child_node,

View File

@ -56,6 +56,7 @@ struct fwnode_reference_args {
* otherwise.
* @property_read_string_array: Read an array of string properties. Return zero
* on success, a negative error code otherwise.
* @get_name: Return the name of an fwnode.
* @get_parent: Return the parent of an fwnode.
* @get_next_child_node: Return the next child node in an iteration.
* @get_named_child_node: Return a child node with a given name.
@ -82,6 +83,7 @@ struct fwnode_operations {
(*property_read_string_array)(const struct fwnode_handle *fwnode_handle,
const char *propname, const char **val,
size_t nval);
const char *(*get_name)(const struct fwnode_handle *fwnode);
struct fwnode_handle *(*get_parent)(const struct fwnode_handle *fwnode);
struct fwnode_handle *
(*get_next_child_node)(const struct fwnode_handle *fwnode,

View File

@ -80,6 +80,7 @@ struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode,
const char *name,
unsigned int index);
const char *fwnode_get_name(const struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_get_next_parent(
struct fwnode_handle *fwnode);