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 <nota...@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
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