[edk2-devel] [PATCH v4 3/4] MdePkg/BaseFdtLib: Add Fdt function.

[brucex.wang@intel.com]

From: "Brucex.Wang" <brucex.wang@intel.com>

Add FdtGetName() and FdtNodeDepth() function.

Cc: Benny Lin <benny.lin@intel.com>
Cc: Gua Guo <gua.guo@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: James Lu <james.lu@intel.com>

Signed-off-by: BruceX Wang <brucex.wang@intel.com>
---
 MdePkg/Include/Library/FdtLib.h    | 34 +++++++++++++++++++++++++
 MdePkg/Library/BaseFdtLib/FdtLib.c | 40 ++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+)

diff --git a/MdePkg/Include/Library/FdtLib.h b/MdePkg/Include/Library/FdtLib.h
index cf5ceba9e9..d9300a18e3 100644
--- a/MdePkg/Include/Library/FdtLib.h
+++ b/MdePkg/Include/Library/FdtLib.h
@@ -398,4 +398,38 @@ FdtSetProp (
   IN UINT32       Length
   );
 
+/**
+  Returns the name of a given node.
+
+  @param[in] Fdt            The pointer to FDT blob.
+  @param[in] NodeOffse      Offset of node to check.
+  @param[in] Length         The pointer to an integer variable (will be overwritten) or NULL.
+
+  @return The pointer to the node's name.
+
+**/
+CONST CHAR8 *
+EFIAPI
+FdtGetName (
+  IN VOID    *Fdt,
+  IN INT32   NodeOffset,
+  IN UINT32  *Length
+  );
+
+/**
+  FdtNodeDepth() finds the depth of a given node.  The root node
+  has depth 0, its immediate subnodes depth 1 and so forth.
+
+  @param[in] Fdt            The pointer to FDT blob.
+  @param[in] NodeOffset     Offset of node to check.
+
+  @return Depth of the node at NodeOffset.
+**/
+INT32
+EFIAPI
+FdtNodeDepth (
+  IN CONST VOID  *Fdt,
+  IN INT32       NodeOffset
+  );
+
 #endif /* FDT_LIB_H_ */
diff --git a/MdePkg/Library/BaseFdtLib/FdtLib.c b/MdePkg/Library/BaseFdtLib/FdtLib.c
index 090b0b3fd4..1ef99ea882 100644
--- a/MdePkg/Library/BaseFdtLib/FdtLib.c
+++ b/MdePkg/Library/BaseFdtLib/FdtLib.c
@@ -402,3 +402,43 @@ FdtSetProp (
 {
   return fdt_setprop (Fdt, NodeOffset, Name, Value, (int)Length);
 }
+
+/**
+  Returns the name of a given node.
+
+  @param[in] Fdt            The pointer to FDT blob.
+  @param[in] NodeOffset     Offset of node to check.
+  @param[in] Length         The pointer to an integer variable (will be overwritten) or NULL.
+
+  @return The pointer to the node's name.
+
+**/
+CONST CHAR8 *
+EFIAPI
+FdtGetName (
+  IN VOID    *Fdt,
+  IN INT32   NodeOffset,
+  IN UINT32  *Length
+  )
+{
+  return fdt_get_name (Fdt, NodeOffset, (int *)Length);
+}
+
+/**
+  FdtNodeDepth() finds the depth of a given node.  The root node
+  has depth 0, its immediate subnodes depth 1 and so forth.
+
+  @param[in] Fdt            The pointer to FDT blob.
+  @param[in] NodeOffset     Offset of node to check.
+
+  @returns Depth of the node at NodeOffset.
+**/
+INT32
+EFIAPI
+FdtNodeDepth (
+  IN CONST VOID  *Fdt,
+  IN INT32       NodeOffset
+  )
+{
+  return fdt_node_depth (Fdt, NodeOffset);
+}
-- 
2.39.1.windows.1



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