[U-Boot] [PATCH v2] stm32f4: fix serial output

This patch fix the serial output. The source is from Kamil Lulko's "stm32f429-discovery board support"

Thanks, Varcain. I learned a lot.

Signed-off-by: kunhuahuang huangkunhua@gmail.com --- drivers/serial/serial_stm32.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/drivers/serial/serial_stm32.c b/drivers/serial/serial_stm32.c index 3c80096..8c613db 100644 --- a/drivers/serial/serial_stm32.c +++ b/drivers/serial/serial_stm32.c @@ -81,6 +81,10 @@ static int stm32_serial_getc(void) static void stm32_serial_putc(const char c) { struct stm32_serial *usart = (struct stm32_serial *)USART_BASE; + + if (c == '\n') + stm32_serial_putc('\r'); + while ((readl(&usart->sr) & USART_SR_FLAG_TXE) == 0) ; writel(c, &usart->dr);