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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>
This commit is contained in:
Petr Štetiar 2011-06-17 11:10:04 +01:00 committed by Russell King
parent 757df746fc
commit 186dcaa448
1 changed files with 2 additions and 2 deletions
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4
arch/arm/mach-ep93xx/core.c
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@ -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);