Some platforms might require the external fdt to boot.
This change provides a mechanism to the board initializaion code to make
the requet explicit.
Signed-off-by: Jorge Ramirez-Ortiz <jorge.rami...@oss.qualcomm.com>
---
arch/arm/mach-snapdragon/board.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/arch/arm/mach-snapdragon/board.c b/arch/arm/mach-snapdragon/board.c
index 2ef936aab75..1bca9dce20f 100644
--- a/arch/arm/mach-snapdragon/board.c
+++ b/arch/arm/mach-snapdragon/board.c
@@ -150,7 +150,13 @@ static void show_psci_version(void)
/* We support booting U-Boot with an internal DT when running as a first-stage
bootloader
* or for supporting quirky devices where it's easier to leave the downstream
DT in place
* to improve ABL compatibility. Otherwise, we use the DT provided by ABL.
+ *
+ * Alternatively the board can enforce the external fdt.
*/
+bool __weak qcom_board_fdt_external(void)
+{
+ return false;
+}
int board_fdt_blob_setup(void **fdtp)
{
struct fdt_header *fdt;
@@ -161,6 +167,12 @@ int board_fdt_blob_setup(void **fdtp)
external_valid = fdt && !fdt_check_header(fdt);
internal_valid = !fdt_check_header(*fdtp);
+ if (qcom_board_fdt_external() && external_valid) {
+ debug("Using external FDT\n");
+ *fdtp = fdt;
+ goto out;
+ }
+
/*
* There is no point returning an error here, U-Boot can't do anything
useful in this situation.
* Bail out while we can still print a useful error message.
@@ -178,6 +190,7 @@ int board_fdt_blob_setup(void **fdtp)
*fdtp = fdt;
}
+out:
/*
* Parse the /memory node while we're here,
* this makes it easy to do other things early.
--
2.34.1
