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authorGrazvydas Ignotas <notasas@gmail.com>2009-11-12 11:46:07 +0200
committerTom Rix <Tom.Rix@windriver.com>2009-11-24 09:04:46 -0600
commit01826abc02ce160501534788e63629ccbe31b05c (patch)
tree7f2c7e1048dea61101ee88e3e62cb0fa6a090f3d
parent3c014f1586d5bfe30dca7549396915c83f31cd30 (diff)
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 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*/\