From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Date: Thu, 12 Nov 2009 07:39:24 -0600 Subject: [U-Boot] [PATCH v2] OMAP3: pandora: fix booting without serial attached In-Reply-To: <1258019167-5379-1-git-send-email-notasas@gmail.com> References: <1258019167-5379-1-git-send-email-notasas@gmail.com> Message-ID: <4AFC100C.1040001@windriver.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 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*/\