fdt: Add ft_system_setup() function for system device tree additions

Add an additional function for adding information to the device tree before
booting. This permits additions which are not board-specific.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Tom Rini <trini@ti.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/fdt_support.h b/include/fdt_support.h
index a101306cffa..0fbc9bdd671 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -88,6 +88,18 @@ void ft_board_setup_ex(void *blob, bd_t *bd);
 void ft_cpu_setup(void *blob, bd_t *bd);
 void ft_pci_setup(void *blob, bd_t *bd);
 
+/**
+ * Add system-specific data to the FDT before booting the OS.
+ *
+ * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
+ * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
+ *
+ * @param blob		FDT blob to update
+ * @param bd_t		Pointer to board data
+ * @return 0 if ok, or -FDT_ERR_... on error
+ */
+int ft_system_setup(void *blob, bd_t *bd);
+
 void set_working_fdt_addr(void *addr);
 int fdt_shrink_to_minimum(void *blob);
 int fdt_increase_size(void *fdt, int add_len);