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. This
> does not prevent serial from working as the internal pullup
> is weak.
>
> Signed-off-by: Grazvydas Ignotas <nota...@gmail.com>
Ack.
Thanks.
> ---
> It would be nice for this to go in as a fix for 2009.11,
> else users without serial cable won't be able to boot it.
>
Wolfgang,
Can this fix be included in 2009.11 ?
Tom
> board/pandora/pandora.h | 3 ++-
> 1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/board/pandora/pandora.h b/board/pandora/pandora.h
> index 5bfa0f9..f0ad16b 100644
> --- a/board/pandora/pandora.h
> +++ b/board/pandora/pandora.h
> @@ -219,7 +219,8 @@ 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*/\
> + /*RX pulled up to avoid noise when nothing is connected to serial port*/\
> + 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*/\
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