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>

diff --git a/drivers/serial/serial_stm32.c b/drivers/serial/serial_stm32.c
index 3c800961d1affb49bb23154e877ea4e4efb0dfca..8c613db95d5875a752e92ecbb7e7f3946eec1b79 100644 (file)
--- 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);