[U-Boot] [PATCH] serial: stm32: Automatically generate CR when LF is observed

[Daniel Thompson]

Currently the u-boot output looks rather odd when running the minicom
terminal emulator in its default mode (just a string of "random" looking
text down the right hand side of the screen).

This is caused by a combination of minicom not automatically wrapping
lines and the stm32 serial driver never sending a carriage return.

Issue is trivially solved by automatically generating a CR whenever a LF
is transmitted, Several other serial drivers implement this behaviour.

Signed-off-by: Daniel Thompson <daniel.thompson at linaro.org>
Cc: Kamil Lulko <rev13 at wp.pl>
---
 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);
-- 
2.1.0