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stm32f4: fix serial output

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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>
This commit is contained in:
kunhuahuang 2015-04-28 02:25:45 +08:00 committed by Tom Rini
parent ecb301394b
commit 85e5f5b7a7
1 changed files with 4 additions and 0 deletions
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4
drivers/serial/serial_stm32.c
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@ -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);