sandbox: Add CONFIG_OF_HOSTFILE to read FDT from host file

With sandbox it is tricky to add an FDT to the image at build time (or
later) since we build an ELF file, not a plain binary, and the address
space of the whole U-Boot is not accessible in the emulated memory map
of sandbox.

Sandbox can read files directly from the host, though, so add an option
to read an FDT from a host file on start-up.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index 5287fd5ee8..2fcec8b363 100644
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -104,6 +104,13 @@ static int sb_cmdline_cb_command(struct sandbox_state *state, const char *arg)
 }
 SB_CMDLINE_OPT_SHORT(command, 'c', 1, "Execute U-Boot command");
 
+static int sb_cmdline_cb_fdt(struct sandbox_state *state, const char *arg)
+{
+	state->fdt_fname = arg;
+	return 0;
+}
+SB_CMDLINE_OPT_SHORT(fdt, 'd', 1, "Specify U-Boot's control FDT");
+
 int main(int argc, char *argv[])
 {
 	struct sandbox_state *state;