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dm: core: Add ofnode_read_prop()

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Add a new function to read a property that supports reading the length as
well.

Reimplement ofnode_read_string() using it and fix its comment.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2020-01-27 08:49:44 -07:00
parent 14ca9f7f5a
commit a8167d8ee2
3 changed files with 62 additions and 8 deletions
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13
include/dm/ofnode.h
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@@ -256,10 +256,21 @@ int ofnode_read_u64(ofnode node, const char *propname, u64 *outp);
*/
u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def);
/**
* ofnode_read_prop() - Read a property from a node
*
* @node: valid node reference to read property from
* @propname: name of the property to read
* @sizep: if non-NULL, returns the size of the property, or an error code
if not found
* @return property value, or NULL if there is no such property
*/
const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep);
/**
* ofnode_read_string() - Read a string from a property
*
* @ref: valid node reference to read property from
* @node: valid node reference to read property from
* @propname: name of the property to read
* @return string from property value, or NULL if there is no such property
*/