diff options
Diffstat (limited to 'include/dm/ofnode.h')
| -rw-r--r-- | include/dm/ofnode.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h index 0787758926f..890f0e6cf40 100644 --- a/include/dm/ofnode.h +++ b/include/dm/ofnode.h @@ -848,6 +848,18 @@ int ofnode_read_string_list(ofnode node, const char *property, const char ***listp); /** + * ofnode_parse_phandle() - Resolve a phandle property to an ofnode + * + * @node: node to check + * @phandle_name: Name of property holding a phandle value + * @index: For properties holding a table of phandles, this is the index into + * the table + * Return: ofnode that the phandle points to or ofnode_null() on error. + */ +ofnode ofnode_parse_phandle(ofnode node, const char *phandle_name, + int index); + +/** * ofnode_parse_phandle_with_args() - Find a node pointed by phandle in a list * * This function is useful to parse lists of phandles and their arguments. @@ -910,6 +922,86 @@ int ofnode_count_phandle_with_args(ofnode node, const char *list_name, const char *cells_name, int cell_count); /** + * oftree_parse_phandle() - Resolve a phandle property to an ofnode + * from a root node + * + * @tree: device tree to use + * @node: node to check + * @phandle_name: Name of property holding a phandle value + * @index: For properties holding a table of phandles, this is the index into + * the table + * Return: ofnode that the phandle points to or ofnode_null() on error. + */ +ofnode oftree_parse_phandle(oftree tree, ofnode node, const char *phandle_name, + int index); + +/** + * oftree_parse_phandle_with_args() - Find a node pointed by phandle in a list + * from a root node + * + * This function is useful to parse lists of phandles and their arguments. + * Returns 0 on success and fills out_args, on error returns appropriate + * errno value. + * + * Caller is responsible to call of_node_put() on the returned out_args->np + * pointer. + * + * Example: + * + * .. code-block:: + * + * phandle1: node1 { + * #list-cells = <2>; + * }; + * phandle2: node2 { + * #list-cells = <1>; + * }; + * node3 { + * list = <&phandle1 1 2 &phandle2 3>; + * }; + * + * To get a device_node of the `node2' node you may call this: + * oftree_parse_phandle_with_args(node3, "list", "#list-cells", 0, 1, &args); + * + * @tree: device tree to use + * @node: device tree node containing a list + * @list_name: property name that contains a list + * @cells_name: property name that specifies phandles' arguments count + * @cell_count: Cell count to use if @cells_name is NULL + * @index: index of a phandle to parse out + * @out_args: optional pointer to output arguments structure (will be filled) + * Return: + * 0 on success (with @out_args filled out if not NULL), -ENOENT if + * @list_name does not exist, -EINVAL if a phandle was not found, + * @cells_name could not be found, the arguments were truncated or there + * were too many arguments. + */ +int oftree_parse_phandle_with_args(oftree tree, ofnode node, const char *list_name, + const char *cells_name, int cell_count, + int index, + struct ofnode_phandle_args *out_args); + +/** + * oftree_count_phandle_with_args() - Count number of phandle in a list + * from a root node + * + * This function is useful to count phandles into a list. + * Returns number of phandle on success, on error returns appropriate + * errno value. + * + * @tree: device tree to use + * @node: device tree node containing a list + * @list_name: property name that contains a list + * @cells_name: property name that specifies phandles' arguments count + * @cell_count: Cell count to use if @cells_name is NULL + * Return: + * number of phandle on success, -ENOENT if @list_name does not exist, + * -EINVAL if a phandle was not found, @cells_name could not be found. + */ +int oftree_count_phandle_with_args(oftree tree, ofnode node, const char *list_name, + const char *cells_name, int cell_count); + +/** * ofnode_path() - find a node by full path * * This uses the control FDT. @@ -1629,6 +1721,21 @@ int ofnode_options_read_int(const char *prop_name, int default_val); const char *ofnode_options_read_str(const char *prop_name); /** + * ofnode_options_get_by_phandle() - Get a ofnode from phandle from the U-Boot options + * + * This reads a property from the /options/u-boot/ node of the devicetree. + * + * This only works with the control FDT. + * + * See dtschema/schemas/options/u-boot.yaml in dt-schema project for bindings + * + * @prop_name: property name to look up + * @nodep: pointer to ofnode where node is stored + * Return: 0, if found, or negative error if not + */ +int ofnode_options_get_by_phandle(const char *prop_name, ofnode *nodep); + +/** * ofnode_read_bootscript_address() - Read bootscr-address or bootscr-ram-offset * * @bootscr_address: pointer to 64bit address where bootscr-address property value |