gpio: remove gpiolib.c and define remaining functions as static inline in asm/gpio.h

[karo-tx-uboot.git] / include / libfdt.h

diff --git a/include/libfdt.h b/include/libfdt.h
index a1ef1e15df3ddbd8abec45766b9f9038f334bcc1..f3cbb637be419d16c35e59aec1aaf08f7819e310 100644 (file)
--- a/include/libfdt.h
+++ b/include/libfdt.h
@@ -163,6 +163,31 @@ int fdt_first_subnode(const void *fdt, int offset);
  */
 int fdt_next_subnode(const void *fdt, int offset);
 
+/**
+ * fdt_for_each_subnode - iterate over all subnodes of a parent
+ *
+ * This is actually a wrapper around a for loop and would be used like so:
+ *
+ *     fdt_for_each_subnode(fdt, node, parent) {
+ *             ...
+ *             use node
+ *             ...
+ *     }
+ *
+ * Note that this is implemented as a macro and node is used as iterator in
+ * the loop. It should therefore be a locally allocated variable. The parent
+ * variable on the other hand is never modified, so it can be constant or
+ * even a literal.
+ *
+ * @fdt:       FDT blob (const void *)
+ * @node:      child node (int)
+ * @parent:    parent node (int)
+ */
+#define fdt_for_each_subnode(fdt, node, parent)                \
+       for (node = fdt_first_subnode(fdt, parent);     \
+            node >= 0;                                 \
+            node = fdt_next_subnode(fdt, node))
+
 /**********************************************************************/
 /* General functions                                                  */
 /**********************************************************************/
@@ -857,6 +882,53 @@ int fdt_node_offset_by_compatible(const void *fdt, int startoffset,
  */
 int fdt_stringlist_contains(const char *strlist, int listlen, const char *str);
 
+/**
+ * fdt_count_strings - count the number of strings in a string list
+ * @fdt: pointer to the device tree blob
+ * @node: offset of the node
+ * @property: name of the property containing the string list
+ * @return: the number of strings in the given property
+ */
+int fdt_count_strings(const void *fdt, int node, const char *property);
+
+/**
+ * fdt_find_string - find a string in a string list and return its index
+ * @fdt: pointer to the device tree blob
+ * @node: offset of the node
+ * @property: name of the property containing the string list
+ * @string: string to look up in the string list
+ * @return: the index of the string or negative on error
+ */
+int fdt_find_string(const void *fdt, int node, const char *property,
+                   const char *string);
+
+/**
+ * fdt_get_string_index() - obtain the string at a given index in a string list
+ * @fdt: pointer to the device tree blob
+ * @node: offset of the node
+ * @property: name of the property containing the string list
+ * @index: index of the string to return
+ * @output: return location for the string
+ * @return: 0 if the string was found or a negative error code otherwise
+ */
+int fdt_get_string_index(const void *fdt, int node, const char *property,
+                        int index, const char **output);
+
+/**
+ * fdt_get_string() - obtain the string at a given index in a string list
+ * @fdt: pointer to the device tree blob
+ * @node: offset of the node
+ * @property: name of the property containing the string list
+ * @output: return location for the string
+ * @return: 0 if the string was found or a negative error code otherwise
+ *
+ * This is a shortcut for:
+ *
+ *     fdt_get_string_index(fdt, node, property, 0, output).
+ */
+int fdt_get_string(const void *fdt, int node, const char *property,
+                  const char **output);
+
 /**********************************************************************/
 /* Read-only functions (addressing related)                           */
 /**********************************************************************/