Changing baudrate is sensitive operation. To ensure that U-Boot messages printed before changing baudrate are not lost, call new U-Boot console flush() function.
Signed-off-by: Pali Rohár <p...@kernel.org> --- cmd/load.c | 5 +++++ drivers/serial/serial-uclass.c | 1 + drivers/serial/serial.c | 1 + 3 files changed, 7 insertions(+) diff --git a/cmd/load.c b/cmd/load.c index e44ae0d56b75..5c4f34781d45 100644 --- a/cmd/load.c +++ b/cmd/load.c @@ -83,6 +83,7 @@ static int do_load_serial(struct cmd_tbl *cmdtp, int flag, int argc, printf("## Switch baudrate to %d bps and press ENTER ...\n", load_baudrate); udelay(50000); + flush(); gd->baudrate = load_baudrate; serial_setbrg(); udelay(50000); @@ -126,6 +127,7 @@ static int do_load_serial(struct cmd_tbl *cmdtp, int flag, int argc, printf("## Switch baudrate to %d bps and press ESC ...\n", current_baudrate); udelay(50000); + flush(); gd->baudrate = current_baudrate; serial_setbrg(); udelay(50000); @@ -317,6 +319,7 @@ int do_save_serial(struct cmd_tbl *cmdtp, int flag, int argc, printf("## Switch baudrate to %d bps and press ESC ...\n", (int)current_baudrate); udelay(50000); + flush(); gd->baudrate = current_baudrate; serial_setbrg(); udelay(50000); @@ -471,6 +474,7 @@ static int do_load_serial_bin(struct cmd_tbl *cmdtp, int flag, int argc, printf("## Switch baudrate to %d bps and press ENTER ...\n", load_baudrate); udelay(50000); + flush(); gd->baudrate = load_baudrate; serial_setbrg(); udelay(50000); @@ -533,6 +537,7 @@ static int do_load_serial_bin(struct cmd_tbl *cmdtp, int flag, int argc, printf("## Switch baudrate to %d bps and press ESC ...\n", current_baudrate); udelay(50000); + flush(); gd->baudrate = current_baudrate; serial_setbrg(); udelay(50000); diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c index 4e32270d4660..0f6860d9100e 100644 --- a/drivers/serial/serial-uclass.c +++ b/drivers/serial/serial-uclass.c @@ -527,6 +527,7 @@ static int on_baudrate(const char *name, const char *value, enum env_op op, printf("## Switch baudrate to %d bps and press ENTER ...\n", baudrate); udelay(50000); + flush(); } gd->baudrate = baudrate; diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c index 6cdbb89841c1..4b525b644928 100644 --- a/drivers/serial/serial.c +++ b/drivers/serial/serial.c @@ -81,6 +81,7 @@ static int on_baudrate(const char *name, const char *value, enum env_op op, printf("## Switch baudrate to %d" " bps and press ENTER ...\n", baudrate); udelay(50000); + flush(); } gd->baudrate = baudrate; -- 2.20.1