arm: am57xx: Fix Linux boot from eMMC

[u-boot] / tools / dtoc / fdt_util.py

diff --git a/tools/dtoc/fdt_util.py b/tools/dtoc/fdt_util.py
index b9dfae8d0e7b606c28fac252f82afcaef801fe49..338d47a5e1489622399f4f7294388a36103044bf 100644 (file)
--- a/tools/dtoc/fdt_util.py
+++ b/tools/dtoc/fdt_util.py
@@ -29,6 +29,22 @@ def fdt32_to_cpu(val):
         val = val.encode('raw_unicode_escape')
     return struct.unpack('>I', val)[0]
 
+def fdt_cells_to_cpu(val, cells):
+    """Convert one or two cells to a long integer
+
+    Args:
+        Value to convert (array of one or more 4-character strings)
+
+    Return:
+        A native-endian long value
+    """
+    if not cells:
+        return 0
+    out = long(fdt32_to_cpu(val[0]))
+    if cells == 2:
+        out = out << 32 | fdt32_to_cpu(val[1])
+    return out
+
 def EnsureCompiled(fname):
     """Compile an fdt .dts source file into a .dtb binary blob if needed.