cmd/fdt: add possibilty to have 'extrasize' on fdt resize

Sometimes devicetree nodes and or properties are added out of the u-boot
console, maybe through some script or manual interaction.

The devicetree as loaded or embedded is quite small, so the devicetree
has to be resized to take up those new nodes/properties.

In original the devicetree was only extended by effective
4 * add_mem_rsv.

With this commit we can add an argument to the "fdt resize" command,
which takes the extrasize to be added.

Signed-off-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com>

Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>
Acked-by: Simon Glass <sjg@chromium.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/include/fdt_support.h b/include/fdt_support.h
index 8f402310f6b..506bc5a9f69 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -167,7 +167,15 @@ void ft_pci_setup(void *blob, bd_t *bd);
 int ft_system_setup(void *blob, bd_t *bd);
 
 void set_working_fdt_addr(ulong addr);
-int fdt_shrink_to_minimum(void *blob);
+
+/**
+ * shrink down the given blob to minimum size + some extrasize if required
+ *
+ * @param blob		FDT blob to update
+ * @param extrasize	additional bytes needed
+ * @return 0 if ok, or -FDT_ERR_... on error
+ */
+int fdt_shrink_to_minimum(void *blob, uint extrasize);
 int fdt_increase_size(void *fdt, int add_len);
 
 int fdt_fixup_nor_flash_size(void *blob);