[PATCH v2 4/5] ARM: ep93xx: fix inverted RTS/DTR signals on uart1

Petr Štetiar ynezz at true.cz
Sun Jun 12 11:04:59 EDT 2011


It was discovered by Roberto Bergo, that RTS/DTR signals are inverted after
the boot, because it was causing him problems with hardware controlled modem
connected on ttyAM0. Todd Valentic came with this patch for the issue.

Discussion: http://tech.groups.yahoo.com/group/ts-7000/message/20259

Cc: Ryan Mallon <ryan at bluewatersys.com>
Cc: Hartley Sweeten <hsweeten at visionengravers.com>
Signed-off-by: Todd Valentic <todd.valentic at sri.com>
Tested-by: Roberto Bergo <roberto.bergo at robson.it>
Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 arch/arm/mach-ep93xx/core.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 8207954..cf1ce32 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -251,9 +251,9 @@ static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 	unsigned int mcr;
 
 	mcr = 0;
-	if (!(mctrl & TIOCM_RTS))
+	if (mctrl & TIOCM_RTS)
 		mcr |= 2;
-	if (!(mctrl & TIOCM_DTR))
+	if (mctrl & TIOCM_DTR)
 		mcr |= 1;
 
 	__raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
-- 
1.7.1




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