sandbox: Add a -D option to use a default device tree

It is painful to specify the full path to the device tree with the -d
option. It is normally kept in the same directory as U-Boot, so provide
an option to use this by default.

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

diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index 42353d80a847bc51eade86f414e72238a8a4916f..097f29a2901b7348171359c596ba53036a738d0f 100644 (file)
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <os.h>
 #include <cli.h>
+#include <malloc.h>
 #include <asm/getopt.h>
 #include <asm/io.h>
 #include <asm/sections.h>
@@ -102,6 +103,25 @@ static int sandbox_cmdline_cb_fdt(struct sandbox_state *state, const char *arg)
 }
 SANDBOX_CMDLINE_OPT_SHORT(fdt, 'd', 1, "Specify U-Boot's control FDT");
 
+static int sandbox_cmdline_cb_default_fdt(struct sandbox_state *state,
+                                         const char *arg)
+{
+       const char *fmt = "%s.dtb";
+       char *fname;
+       int len;
+
+       len = strlen(state->argv[0]) + strlen(fmt) + 1;
+       fname = os_malloc(len);
+       if (!fname)
+               return -ENOMEM;
+       snprintf(fname, len, fmt, state->argv[0]);
+       state->fdt_fname = fname;
+
+       return 0;
+}
+SANDBOX_CMDLINE_OPT_SHORT(default_fdt, 'D', 0,
+               "Use the default u-boot.dtb control FDT in U-Boot directory");
+
 static int sandbox_cmdline_cb_interactive(struct sandbox_state *state,
                                          const char *arg)
 {