At present this override function is called even when OF_BOARD Is not
enabled. This makes it impossible to disable this feature and in fact
makes the OF_BOARD option useless.
Reinstate its intended purpose, so that it is possible to switch between
the appended devicetree and one provided by the board's custom function.
Signed-off-by: Simon Glass <s...@chromium.org>
---
(no changes since v5)
Changes in v5:
- Add new patches to clean up fdtdec_setup() and surrounds
include/fdtdec.h | 7 +++++--
lib/fdtdec.c | 21 ++++++++++++---------
2 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 68786111a44..68a36f10583 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -1170,10 +1170,13 @@ int fdtdec_resetup(int *rescan);
/**
* Board-specific FDT initialization. Returns the address to a device tree
blob.
- * Called when CONFIG_OF_BOARD is defined, or if CONFIG_OF_SEPARATE is defined
- * and the board implements it.
+ *
+ * Called when CONFIG_OF_BOARD is defined.
+ *
+ * The existing devicetree is available at gd->fdt_blob
*
* @err internal error code if we fail to setup a DTB
+ * @returns new devicetree blob pointer
*/
void *board_fdt_blob_setup(int *err);
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index a7f62123a94..31a509bc221 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1203,15 +1203,15 @@ static int uncompress_blob(const void *src, ulong
sz_src, void **dstp)
return 0;
}
-/*
- * For CONFIG_OF_SEPARATE, the board may optionally implement this to
- * provide and/or fixup the fdt.
+/**
+ * fdt_find_separate() - Find a devicetree at the end of the image
+ *
+ * @return pointer to FDT blob
*/
-__weak void *board_fdt_blob_setup(int *err)
+static void *fdt_find_separate(void)
{
void *fdt_blob = NULL;
- *err = 0;
#ifdef CONFIG_SPL_BUILD
/* FDT is at end of BSS unless it is in a different memory region */
if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
@@ -1626,13 +1626,16 @@ int fdtdec_setup(void)
int ret;
/* The devicetree is typically appended to U-Boot */
- if (IS_ENABLED(CONFIG_OF_SEPARATE) || IS_ENABLED(CONFIG_OF_BOARD)) {
- /* Allow the board to override the fdt address. */
+ if (IS_ENABLED(CONFIG_OF_SEPARATE))
+ gd->fdt_blob = fdt_find_separate();
+ else /* embed dtb in ELF file for testing / development */
+ gd->fdt_blob = dtb_dt_embedded();
+
+ /* Allow the board to override the fdt address. */
+ if (IS_ENABLED(CONFIG_OF_BOARD)) {
gd->fdt_blob = board_fdt_blob_setup(&ret);
if (ret)
return ret;
- } else { /* embed dtb in ELF file for testing / development */
- gd->fdt_blob = dtb_dt_embedded();
}
if (!IS_ENABLED(CONFIG_SPL_BUILD)) {
--
2.34.0.rc2.393.gf8c9666880-goog
