Commit 85e5f5b7 authored by kunhuahuang's avatar kunhuahuang Committed by Tom Rini

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: default avatarkunhuahuang <>
parent ecb30139
......@@ -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')
while ((readl(&usart->sr) & USART_SR_FLAG_TXE) == 0)
writel(c, &usart->dr);
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