[PATCH v1 3/3] bootflow: bootmeth_efi: Handle fdt not available.

[Shantur Rathore]

While booting with efi, if fdt isn't available externally,
just use the built-in one.

Signed-off-by: Shantur Rathore <i at shantur.com>
---
 boot/bootmeth_efi.c | 10 +++++++++-
 include/bootflow.h  |  1 +
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/boot/bootmeth_efi.c b/boot/bootmeth_efi.c
index a65d8ff582..c1e15b83a3 100644
--- a/boot/bootmeth_efi.c
+++ b/boot/bootmeth_efi.c
@@ -312,6 +312,7 @@ static int distro_efi_try_bootflow_files(struct udevice *dev,
 		 */
 	} else {
 		log_debug("No device tree available\n");
+		bflow->flags |= BOOTFLOWF_USE_BUILTIN_FDT;
 	}
 
 	return 0;
@@ -381,6 +382,7 @@ static int distro_efi_read_bootflow_net(struct bootflow *bflow)
 		bflow->fdt_addr = fdt_addr;
 	} else {
 		log_debug("No device tree available\n");
+		bflow->flags |= BOOTFLOWF_USE_BUILTIN_FDT;
 	}
 
 	bflow->state = BOOTFLOWST_READY;
@@ -442,7 +444,13 @@ static int distro_efi_boot(struct udevice *dev, struct bootflow *bflow)
 	 * At some point we can add a real interface to bootefi so we can call
 	 * this directly. For now, go through the CLI, like distro boot.
 	 */
-	snprintf(cmd, sizeof(cmd), "bootefi %lx %lx", kernel, fdt);
+	if (bflow->flags & BOOTFLOWF_USE_BUILTIN_FDT) {
+		log_debug("Booting with built-in fdt\n");
+		snprintf(cmd, sizeof(cmd), "bootefi %lx", kernel);
+	} else {
+		snprintf(cmd, sizeof(cmd), "bootefi %lx %lx", kernel, fdt);
+	}
+
 	if (run_command(cmd, 0))
 		return log_msg_ret("run", -EINVAL);
 
diff --git a/include/bootflow.h b/include/bootflow.h
index 44d3741eac..ea6c6ffc0c 100644
--- a/include/bootflow.h
+++ b/include/bootflow.h
@@ -46,6 +46,7 @@ enum bootflow_state_t {
  */
 enum bootflow_flags_t {
 	BOOTFLOWF_USE_PRIOR_FDT	= 1 << 0,
+	BOOTFLOWF_USE_BUILTIN_FDT	= 1 << 1,
 };
 
 /**
-- 
2.40.1