bdinfo: Show information about the serial port

It is useful to see the detailed setting of the serial port, e.g. to
allow setting up earlycon or console for Linux. Add this output to the
'bdinfo' command.

Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
[bmeng: squashed in [email protected]]
Signed-off-by: Bin Meng <[email protected]>

1 files changed, 21 insertions, 0 deletions

diff --git a/cmd/bdinfo.c b/cmd/bdinfo.c
index 365357ca545..dab73f1d93c 100644
--- a/cmd/bdinfo.c
+++ b/cmd/bdinfo.c
@@ -13,6 +13,7 @@
 #include <lmb.h>
 #include <mapmem.h>
 #include <net.h>
+#include <serial.h>
 #include <video.h>
 #include <vsprintf.h>
 #include <asm/cache.h>
@@ -113,6 +114,25 @@ static void show_video_info(void)
 	}
 }
 
+static void print_serial(struct udevice *dev)
+{
+	struct serial_device_info info;
+	int ret;
+
+	if (!dev || !IS_ENABLED(CONFIG_DM_SERIAL))
+		return;
+
+	ret = serial_getinfo(dev, &info);
+	if (ret)
+		return;
+
+	bdinfo_print_num_l("serial addr", info.addr);
+	bdinfo_print_num_l(" width", info.reg_width);
+	bdinfo_print_num_l(" shift", info.reg_shift);
+	bdinfo_print_num_l(" offset", info.reg_offset);
+	bdinfo_print_num_l(" clock", info.clock);
+}
+
 int do_bdinfo(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	struct bd_info *bd = gd->bd;
@@ -151,6 +171,7 @@ int do_bdinfo(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 		if (IS_ENABLED(CONFIG_OF_REAL))
 			printf("devicetree  = %s\n", fdtdec_get_srcname());
 	}
+	print_serial(gd->cur_serial_dev);
 
 	arch_print_bdinfo();