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authorGrazvydas Ignotas <notasas@gmail.com>2009-11-12 11:46:07 +0200
committerTom Rix <Tom.Rix@windriver.com>2009-11-27 16:26:14 -0600
commitc90b32739a50ca52d9b8d220ea6875ae994566ec (patch)
treed16e69ab5b8b1a2b2f518c29b18b8456fde9c5cd
parentac67804fbb2d82a19170066c02af7053d474ce8d (diff)
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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 <notasas@gmail.com>
-rw-r--r--board/pandora/pandora.h3
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*/\