MdePkg/BaseFdtLib: Add FdtNodeOffsetByCompatible()

This adds FdtNodeOffsetByCompatible() to support finding the offset of the first node with a given 'compatible' value after an offset. Signed-off-by: Nhi Pham <[email protected]>
NVIDIA · Aug 28, 2024 · 90d0ec1 · 90d0ec1
1 parent 99e4c8e
commit 90d0ec1
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diff --git a/MdePkg/Include/Library/FdtLib.h b/MdePkg/Include/Library/FdtLib.h
@@ -432,4 +432,21 @@ FdtNodeDepth (
   IN INT32       NodeOffset
   );
 
+/**
+  Find nodes with a given 'compatible' value.
+
+  @param[in] Fdt            The pointer to FDT blob.
+  @param[in] StartOffset    Only find nodes after this offset.
+  @param[in] Compatible     The string to match against.
+
+  @retval The offset of the first node after StartOffset.
+**/
+INT32
+EFIAPI
+FdtNodeOffsetByCompatible (
+  IN CONST VOID   *Fdt,
+  IN INT32        StartOffset,
+  IN CONST CHAR8  *Compatible
+  );
+
 #endif /* FDT_LIB_H_ */
diff --git a/MdePkg/Library/BaseFdtLib/FdtLib.c b/MdePkg/Library/BaseFdtLib/FdtLib.c
@@ -442,3 +442,23 @@ FdtNodeDepth (
 {
   return fdt_node_depth (Fdt, NodeOffset);
 }
+
+/**
+  Find nodes with a given 'compatible' value.
+
+  @param[in] Fdt            The pointer to FDT blob.
+  @param[in] StartOffset    Only find nodes after this offset.
+  @param[in] Compatible     The string to match against.
+
+  @retval The offset of the first node after StartOffset.
+**/
+INT32
+EFIAPI
+FdtNodeOffsetByCompatible (
+  IN CONST VOID   *Fdt,
+  IN INT32        StartOffset,
+  IN CONST CHAR8  *Compatible
+  )
+{
+  return fdt_node_offset_by_compatible (Fdt, StartOffset, Compatible);
+}