ARM: 6966/1: ep93xx: fix inverted RTS/DTR signals on uart1

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

Comments from Petr Štetiar:

 Sorry, but forget to add Acked-by[1]:

 1. https://patchwork.kernel.org/patch/873052/

Cc: Ryan Mallon <ryan@bluewatersys.com>
Cc: Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Todd Valentic <todd.valentic@sri.com>
Tested-by: Roberto Bergo <roberto.bergo@robson.it>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 1d4b65fd673eb23e9d2ac2fd9dbded0f2e8ba6d9..6659a0d137a32f246895a011195d1ead66657841 100644 (file)
--- 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);