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| author | Julius Werner <jwerner@chromium.org> | 2019-05-03 18:29:28 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-06-04 11:23:48 +0000 |
| commit | fbec63d15f761e01c934078570acbef779e707ba (patch) | |
| tree | 64adbebdfed8205b3dfe7b12d490f32759a830b2 /src/lib | |
| parent | f36d53c6539ec9e221a5005f00a56960f791a81f (diff) | |
| download | coreboot-fbec63d15f761e01c934078570acbef779e707ba.tar.xz | |
device_tree: Have absolute paths start with '/'
Currently DT paths are *not* expected to start with '/'. This is not
what the spec says (see Devicetree Specification v0.2, 2.2.3 Path Names)
and also not what is done by Linux.
Change dt_find_node_by_path() to expect paths to start with '/' and add
a leading '/' to all DT path strings. Besides the compatibility with the
spec this change is also needed to support aliases in the future.
This patch was adapted from depthcharge's http://crosreview.com/1252770
Change-Id: Ibdf59ccbb4ead38c6193b630642fd1f1e847dd89
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32865
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/device_tree.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/lib/device_tree.c b/src/lib/device_tree.c index 3e1dd3580c..e26021e9ee 100644 --- a/src/lib/device_tree.c +++ b/src/lib/device_tree.c @@ -556,7 +556,7 @@ struct device_tree_node *dt_find_node(struct device_tree_node *parent, * * @param tree The device tree to search. * @param path A string representing a path in the device tree, with - * nodes separated by '/'. Example: "soc/firmware/coreboot" + * nodes separated by '/'. Example: "/firmware/coreboot" * @param addrcp Pointer that will be updated with any #address-cells * value found in the path. May be NULL to ignore. * @param sizecp Pointer that will be updated with any #size-cells @@ -565,13 +565,13 @@ struct device_tree_node *dt_find_node(struct device_tree_node *parent, * @return The found/created node, or NULL. * * It is the caller responsibility to provide the correct path string, namely - * not starting or ending with a '/', and not having "//" anywhere in it. + * starting with a '/', not ending in a '/' and not having "//" anywhere in it. */ struct device_tree_node *dt_find_node_by_path(struct device_tree *tree, const char *path, u32 *addrcp, u32 *sizecp, int create) { - char *dup_path = strdup(path); + char *dup_path = strdup(&path[1]); /* remove leading '/' */ /* Hopefully enough depth for any node. */ const char *path_array[15]; int i; @@ -995,7 +995,7 @@ struct device_tree_node *dt_init_reserved_memory_node(struct device_tree *tree) struct device_tree_node *reserved; u32 addr = 0, size = 0; - reserved = dt_find_node_by_path(tree, "reserved-memory", &addr, + reserved = dt_find_node_by_path(tree, "/reserved-memory", &addr, &size, 1); if (!reserved) return NULL; |