[PATCH 15/17] pylibfdt: Add add_mem_rsv() and del_mem_rsv()

The memory reserve map can be read through num_mem_rsv() and
get_mem_rsv(), but changing it requires calling the raw fdt_* wrappers
with the private Fdt._fdt buffer, as the class exposes no methods for
the write side.

Add them next to the existing accessors.

This is a backport of dtc commit 89c99ce78ac8 ("pylibfdt: Add
add_mem_rsv() and del_mem_rsv()").

Link: https://github.com/dgibson/dtc/pull/190
Signed-off-by: David Gibson <[email protected]>
Signed-off-by: Alexey Charkov <[email protected]>
---
 scripts/dtc/pylibfdt/libfdt.i_shipped | 36 +++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/scripts/dtc/pylibfdt/libfdt.i_shipped b/scripts/dtc/pylibfdt/libfdt.i_shipped
index 1983ebaee335..127ec22de3fe 100644
--- a/scripts/dtc/pylibfdt/libfdt.i_shipped
+++ b/scripts/dtc/pylibfdt/libfdt.i_shipped
@@ -640,6 +640,42 @@ class Fdt(FdtRo):
         del self._fdt[self.totalsize():]
         return err
 
+    def add_mem_rsv(self, addr, size, quiet=()):
+        """Add a memory reserve-map record
+
+        This asks the client program not to use the given region of memory,
+        e.g. because something was loaded there.
+
+        Args:
+            addr: Start address of the region to reserve
+            size: Size of the region to reserve, in bytes
+            quiet: Errors to ignore (empty to raise on all errors)
+
+        Returns:
+            Error code, or 0 if OK
+
+        Raises:
+            FdtException if there is no space for another record, or another
+            error occurs
+        """
+        return check_err(fdt_add_mem_rsv(self._fdt, addr, size), quiet)
+
+    def del_mem_rsv(self, index, quiet=()):
+        """Remove the indexed memory reserve-map record
+
+        Args:
+            index: Record to remove (0=first)
+            quiet: Errors to ignore (empty to raise on all errors)
+
+        Returns:
+            Error code, or 0 if OK
+
+        Raises:
+            FdtException if there is no record at @index, or another error
+            occurs
+        """
+        return check_err(fdt_del_mem_rsv(self._fdt, index), quiet)
+
     def set_name(self, nodeoffset, name, quiet=()):
         """Set the name of a node
 

-- 
2.54.0