On 15:12 Fri 04 Sep     , Tom Rix wrote:
> The preferred serial output comes from the debug board.
> When the debug board is disconnected, fall back on using
> usbtty from the usb connector on the Zoom2 board.
> 
> This shows up as /dev/ttyACM0 in a linux host.
> 
> Signed-off-by: Tom Rix <tom....@windriver.com>
> ---
>  board/omap3/zoom2/zoom2_serial.c |   16 ++++++++++++++++
>  include/configs/omap3_zoom2.h    |   17 +++++++++++++++++
>  2 files changed, 33 insertions(+), 0 deletions(-)
> 
> diff --git a/board/omap3/zoom2/zoom2_serial.c 
> b/board/omap3/zoom2/zoom2_serial.c
> index a3d777d..434696a 100644
> --- a/board/omap3/zoom2/zoom2_serial.c
> +++ b/board/omap3/zoom2/zoom2_serial.c
> @@ -87,6 +87,10 @@ void quad_putc_dev (unsigned long base, const char c)
>  
>               NS16550_putc ((NS16550_t) base, c);
>       }
> +#ifdef CONFIG_USB_TTY
why not do this
#ifndef CONFIG_USB_TTY
#define usbtty_putc(c)
#define usbtty_puts(s)
#define usbtty_getc()   0
#define usbtty_tstc()   0
#endif

and then avoid the ifdef

Best Regards,
J.
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