diff options
| -rw-r--r-- | Documentation/devicetree/bindings/mtd/partition.txt | 21 | ||||
| -rw-r--r-- | drivers/of/of_path.c | 17 |
2 files changed, 37 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/mtd/partition.txt b/Documentation/devicetree/bindings/mtd/partition.txt new file mode 100644 index 0000000000..ab21ff25bb --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/partition.txt @@ -0,0 +1,21 @@ +Representing flash partitions in devicetree + +In addition to the upstream binding, another property is added: + +Optional properties: +- partuuid : The partition UUID for this partition. + + +Examples: + +flash@0 { + partitions { + compatible = "fixed-partitions"; + #address-cells = <1>; + #size-cells = <1>; + + state_part: state { + partuuid = "16367da7-c518-499f-9aad-e1f366692365"; + }; + }; +}; diff --git a/drivers/of/of_path.c b/drivers/of/of_path.c index 334eab841a..e53041b0a1 100644 --- a/drivers/of/of_path.c +++ b/drivers/of/of_path.c @@ -56,11 +56,26 @@ static int __of_find_path(struct device_node *node, const char *part, char **out dev = of_find_device_by_node_path(node->full_name); if (!dev) { + int ret; + const char *uuid; struct device_node *devnode = node->parent; - if (of_device_is_compatible(devnode, "fixed-partitions")) + if (of_device_is_compatible(devnode, "fixed-partitions")) { devnode = devnode->parent; + /* when partuuid is specified short-circuit the search for the cdev */ + ret = of_property_read_string(node, "partuuid", &uuid); + if (!ret) { + cdev = cdev_by_partuuid(uuid); + if (!cdev) + return -ENODEV; + + *outpath = basprintf("/dev/%s", cdev->name); + + return 0; + } + } + dev = of_find_device_by_node_path(devnode->full_name); if (!dev) return -ENODEV; |