From c90b32739a50ca52d9b8d220ea6875ae994566ec Mon Sep 17 00:00:00 2001 From: Grazvydas Ignotas Date: Thu, 12 Nov 2009 11:46:07 +0200 Subject: [PATCH] OMAP3: pandora: fix booting without serial attached 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 --- board/pandora/pandora.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/board/pandora/pandora.h b/board/pandora/pandora.h index 5bfa0f9e26..f0ad16b0a4 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*/\ -- 2.25.1