[PATCH v7 28/31] fdt: Report the devicetree source

[Simon Glass]

It can be confusing to figure out where the devicetree came from. It seems
important enough to warrant a message during boot. Add information about
the number of devices and uclasses too since it is helpful to have some
idea what is going on with driver model.

Report the devicetree source in bdinfo too.

This looks something like this, with > marking the new line.

   U-Boot 2021.10-00190 (Oct 30 2021 - 09:01:29 -0600)

   DRAM:  128 MiB
>  Core:  42 devices, 11 uclasses, devicetree: passage
   Flash: 64 MiB

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

Changes in v7:
- Drop FDTSRC_PASSAGE for now

 cmd/bdinfo.c     |  2 ++
 common/board_r.c | 18 ++++++++++++++++++
 lib/fdtdec.c     | 13 +++++++++++++
 3 files changed, 33 insertions(+)

diff --git a/cmd/bdinfo.c b/cmd/bdinfo.c
index bf63cc6d649..c56b3f4f6ec 100644
--- a/cmd/bdinfo.c
+++ b/cmd/bdinfo.c
@@ -128,6 +128,8 @@ int do_bdinfo(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 
 		lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
 		lmb_dump_all_force(&lmb);
+		if (IS_ENABLED(CONFIG_OF_REAL))
+			printf("devicetree  = %s\n", fdtdec_get_srcname());
 	}
 
 	arch_print_bdinfo();
diff --git a/common/board_r.c b/common/board_r.c
index 31a59c585a8..99adff14b39 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -586,6 +586,23 @@ int initr_mem(void)
 }
 #endif
 
+static int dm_announce(void)
+{
+	int device_count;
+	int uclass_count;
+
+	if (IS_ENABLED(CONFIG_DM)) {
+		dm_get_stats(&device_count, &uclass_count);
+		printf("Core:  %d devices, %d uclasses", device_count,
+		       uclass_count);
+		if (CONFIG_IS_ENABLED(OF_REAL))
+			printf(", devicetree: %s", fdtdec_get_srcname());
+		printf("\n");
+	}
+
+	return 0;
+}
+
 static int run_main_loop(void)
 {
 #ifdef CONFIG_SANDBOX
@@ -661,6 +678,7 @@ static init_fnc_t init_sequence_r[] = {
 	stdio_init_tables,
 	serial_initialize,
 	initr_announce,
+	dm_announce,
 #if CONFIG_IS_ENABLED(WDT)
 	initr_watchdog,
 #endif
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 8cfa958fb96..118c100b389 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -76,6 +76,19 @@ static const char * const compat_names[COMPAT_COUNT] = {
 	COMPAT(ALTERA_SOCFPGA_CLK_INIT, "altr,socfpga-a10-clk-init")
 };
 
+static const char *const fdt_src_name[] = {
+	[FDTSRC_SEPARATE] = "separate",
+	[FDTSRC_FIT] = "fit",
+	[FDTSRC_BOARD] = "board",
+	[FDTSRC_EMBED] = "embed",
+	[FDTSRC_ENV] = "env",
+};
+
+const char *fdtdec_get_srcname(void)
+{
+	return fdt_src_name[gd->fdt_src];
+}
+
 const char *fdtdec_get_compatible(enum fdt_compat_id id)
 {
 	/* We allow reading of the 'unknown' ID for testing purposes */
-- 
2.34.1.400.ga245620fadb-goog