提交 186dcaa4 编写于 作者: P Petr Štetiar 提交者: Russell King

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: NTodd Valentic <todd.valentic@sri.com>
Tested-by: NRoberto Bergo <roberto.bergo@robson.it>
Signed-off-by: NPetr Štetiar <ynezz@true.cz>
Acked-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
上级 757df746
......@@ -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);
......
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