[PATCH v3 9/9] qemu-arm: get FDT from bloblist

[Raymond Mao]

Get devicetree from a bloblist if it exists.
If not, fallback to get FDT from the specified memory address.

Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
---
Changes in v2
- Refactor of board_fdt_blob_setup().

 board/emulation/qemu-arm/qemu-arm.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/board/emulation/qemu-arm/qemu-arm.c b/board/emulation/qemu-arm/qemu-arm.c
index e225011bf0..d326668caf 100644
--- a/board/emulation/qemu-arm/qemu-arm.c
+++ b/board/emulation/qemu-arm/qemu-arm.c
@@ -149,9 +149,17 @@ int dram_init_banksize(void)
 
 void *board_fdt_blob_setup(int *err)
 {
+	void *fdt = NULL;
 	*err = 0;
-	/* QEMU loads a generated DTB for us at the start of RAM. */
-	return (void *)CFG_SYS_SDRAM_BASE;
+
+	/* Check if a DTB exists in bloblist */
+	if (IS_ENABLED(CONFIG_BLOBLIST) && !bloblist_maybe_init())
+		fdt = bloblist_find(BLOBLISTT_CONTROL_FDT, 0);
+	if (!fdt)
+		/* QEMU loads a generated DTB for us at the start of RAM. */
+		return (void *)CFG_SYS_SDRAM_BASE;
+
+	return fdt;
 }
 
 int board_bloblist_from_boot_arg(unsigned long addr, unsigned long size)
-- 
2.25.1