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@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*/\