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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2019-10-03 15:32:13 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-10-11 11:26:55 +0200 |
| commit | e7e242bccb209b5f73455b33928b8680cc6e3319 (patch) | |
| tree | 71ab6dcb21967662c41dae3fd869b421f5775b60 /drivers/acpi/property.c | |
| parent | bc0500c1e43d95cca5352d2345fb0769f314ba22 (diff) | |
| download | linux-e7e242bccb209b5f73455b33928b8680cc6e3319.tar.bz2 | |
device property: Add a function to obtain a node's prefix
The prefix is used for printing purpose before a node, and it also works
as a separator between two nodes.
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>
Diffstat (limited to 'drivers/acpi/property.c')
| -rw-r--r-- | drivers/acpi/property.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index a501c1c584b5..e601c4511a8b 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -1342,6 +1342,27 @@ static const char *acpi_fwnode_get_name(const struct fwnode_handle *fwnode) return acpi_device_bid(adev); } +static const char * +acpi_fwnode_get_name_prefix(const struct fwnode_handle *fwnode) +{ + struct fwnode_handle *parent; + + /* Is this the root node? */ + parent = fwnode_get_parent(fwnode); + if (!parent) + return ""; + + /* Is this 2nd node from the root? */ + parent = fwnode_get_next_parent(parent); + if (!parent) + return ""; + + fwnode_handle_put(parent); + + /* ACPI device or data node. */ + return "."; +} + static struct fwnode_handle * acpi_fwnode_get_parent(struct fwnode_handle *fwnode) { @@ -1383,6 +1404,7 @@ acpi_fwnode_device_get_match_data(const struct fwnode_handle *fwnode, .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_name_prefix = acpi_fwnode_get_name_prefix, \ .get_reference_args = acpi_fwnode_get_reference_args, \ .graph_get_next_endpoint = \ acpi_graph_get_next_endpoint, \ |