[U-Boot] [PATCH] serial: lpc32xx: send CR before LF

[Marek Vasut]

Dear Vladimir Zapolskiy,

> For LPC32XX high-speed UART it is required to send a carriage return
> symbol along with line feed.

Why ?

> The problem was introduced in e503f90a
> commit.
> 
> Signed-off-by: Vladimir Zapolskiy <vz at mleia.com>
> Cc: Marek Vasut <marex at denx.de>
> ---
>  drivers/serial/lpc32xx_hsuart.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/serial/lpc32xx_hsuart.c
> b/drivers/serial/lpc32xx_hsuart.c index 9c7c621..c8926a8 100644
> --- a/drivers/serial/lpc32xx_hsuart.c
> +++ b/drivers/serial/lpc32xx_hsuart.c
> @@ -38,6 +38,9 @@ static int lpc32xx_serial_getc(void)
> 
>  static void lpc32xx_serial_putc(const char c)
>  {
> +	if (c == '\n')
> +		serial_putc('\r');
> +
>  	writel(c, &hsuart->tx);
> 
>  	/* Wait for character to be sent */

btw. I have a feeling each and every driver does send CR-LF combo and emulates 
it this way. Maybe this should eventually go into common code ? But that's just 
a suggestion for future improvement.

Best regards,
Marek Vasut