[U-Boot] [RFC PATCH] arm: bootm: Boot kernel with U-Boot's FDT blob

[Michal Simek]

U-Boot configured via DTB can use the same DTB for booting the kernel.
When OF_CONTROL is used fdtcontroladdr is setup and can be use for boot.

Signed-off-by: Michal Simek <michal.si...@xilinx.com>
---

Didn't check if there is any side effect or not but it looks weird when
you have DT driver u-boot that you have to load dtb again.

---
 arch/arm/lib/bootm.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 43cc83ec95b6..9740045b0094 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -245,6 +245,20 @@ static void boot_prep_linux(bootm_headers_t *images)
                }
                setup_board_tags(&params);
                setup_end_tag(gd->bd);
+       } else if (IS_ENABLED(CONFIG_OF_CONTROL)) {
+#ifdef CONFIG_OF_LIBFDT
+               images->ft_addr = (char *)getenv_hex("fdtcontroladdr", 0);
+               if (!images->ft_addr) {
+                       printf("FDT address failed! hanging...");
+                       hang();
+               }
+
+               debug("using: U-Boot's FDT\n");
+               if (image_setup_linux(images)) {
+                       printf("FDT creation failed! hanging...");
+                       hang();
+               }
+#endif
        } else {
                printf("FDT and ATAGS support not compiled in - hanging\n");
                hang();
-- 
1.9.1

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