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 <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: squashed in 20230716033929.253357-2-sjg@chromium.org]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/cmd/bdinfo.c b/cmd/bdinfo.c
index 365357c..dab73f1 100644 (file)
--- 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();
 

diff --git a/test/cmd/bdinfo.c b/test/cmd/bdinfo.c
index cddf1a4..6480393 100644 (file)
--- a/test/cmd/bdinfo.c
+++ b/test/cmd/bdinfo.c
@@ -16,6 +16,7 @@
 #include <env.h>
 #include <lmb.h>
 #include <net.h>
+#include <serial.h>
 #include <video.h>
 #include <vsprintf.h>
 #include <asm/cache.h>
@@ -191,6 +192,19 @@ static int bdinfo_test_move(struct unit_test_state *uts)
                        ut_assert_nextline("devicetree  = %s", fdtdec_get_srcname());
        }
 
+       if (IS_ENABLED(CONFIG_DM_SERIAL)) {
+               struct serial_device_info info;
+
+               ut_assertnonnull(gd->cur_serial_dev);
+               ut_assertok(serial_getinfo(gd->cur_serial_dev, &info));
+
+               ut_assertok(test_num_l(uts, "serial addr", info.addr));
+               ut_assertok(test_num_l(uts, " width", info.reg_width));
+               ut_assertok(test_num_l(uts, " shift", info.reg_shift));
+               ut_assertok(test_num_l(uts, " offset", info.reg_offset));
+               ut_assertok(test_num_l(uts, " clock", info.clock));
+       }
+
        ut_assertok(ut_check_console_end(uts));
 
        return 0;