Add weak function which is called right after fdtdec_setup() configured
the U-Boot DT. This permits board-specific adjustments to the U-Boot DT
before U-Boot starts parsing the DT. This could be used e.g. to patch in
various custom nodes or merge in DT fragments from prior-stage firmware.
Signed-off-by: Marek Vasut <marek.vasut+rene...@gmail.com>
Cc: Nobuhiro Iwamatsu <iwama...@nigauri.org>
Cc: Simon Glass <s...@chromium.org>
Cc: Tom Rini <tr...@konsulko.com>
---
V2: Add the function to fdtdec.h
---
include/fdtdec.h | 5 +++++
lib/fdtdec.c | 11 ++++++++++-
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 166f29c55b..abd6d42671 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -1155,6 +1155,11 @@ int fdtdec_set_carveout(void *blob, const char *node,
const char *prop_name,
*/
int fdtdec_setup(void);
+/**
+ * Perform board-specific early DT adjustments
+ */
+int fdtdec_board_setup(const void *fdt_blob);
+
#if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
/**
* fdtdec_resetup() - Set up the device tree again
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 0a3b860782..f366dcedb8 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1472,8 +1472,14 @@ int fdtdec_set_carveout(void *blob, const char *node,
const char *prop_name,
return 0;
}
+__weak int fdtdec_board_setup(const void *fdt_blob)
+{
+ return 0;
+}
+
int fdtdec_setup(void)
{
+ int ret;
#if CONFIG_IS_ENABLED(OF_CONTROL)
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
void *fdt_blob;
@@ -1526,7 +1532,10 @@ int fdtdec_setup(void)
# endif
#endif
- return fdtdec_prepare_fdt();
+ ret = fdtdec_prepare_fdt();
+ if (!ret)
+ ret = fdtdec_board_setup(gd->fdt_blob);
+ return ret;
}
#if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
--
2.25.1
