[U-Boot] [PATCH] OMAP3: pandora: fix booting without serial attached

[Tom]

Grazvydas Ignotas wrote:
> When the board is booted without serial cable attached (which
> is how most of them will be used) UART RX is left floating and
> sometimes picks noise, which interrupts countdown and enters
> U-Boot prompt instead of booting the kernel. Fix this by setting
> up internal pullup on UART RX pin.
> 
> Signed-off-by: Grazvydas Ignotas <notasas at gmail.com>
> ---
>  board/pandora/pandora.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/board/pandora/pandora.h b/board/pandora/pandora.h
> index 5bfa0f9..f1e1db9 100644
> --- a/board/pandora/pandora.h
> +++ b/board/pandora/pandora.h
> @@ -219,7 +219,7 @@ const omap3_sysinfo sysinfo = {
>  	MUX_VAL(CP(UART2_RX),		(IEN  | PTD | EN  | M4)) /*GPIO_147,*/\
>  								 /*UART2_RX*/\
>   /*Serial Interface (Peripheral boot, Linux console, on AV connector)*/\
> -	MUX_VAL(CP(UART3_RX_IRRX),	(IEN  | PTD | DIS | M0)) /*UART3_RX*/\
> +	MUX_VAL(CP(UART3_RX_IRRX),	(IEN  | PTU | EN  | M0)) /*UART3_RX*/\
>  	MUX_VAL(CP(UART3_TX_IRTX),	(IDIS | PTD | DIS | M0)) /*UART3_TX*/\
>   /*LEDs (Controlled by OMAP)*/\
>  	MUX_VAL(CP(MMC1_DAT6),		(IDIS | PTD | DIS | M4)) /*GPIO_128*/\

Will this change disable normal u-boot serial?
 From the config file

/*
  * select serial console configuration
  */
#define CONFIG_CONS_INDEX		3
#define CONFIG_SYS_NS16550_COM3		OMAP34XX_UART3
#define CONFIG_SERIAL3			3

It looks like it will.

This must be as a non default config option.

Tom