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authorPetr Štetiar <ynezz@true.cz>2011-06-17 06:10:04 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-07-06 15:46:36 -0400
commit186dcaa448c0a7a99933efac2af225fc4fe82c53 (patch)
tree3ec0745cc4fdd8c81260ceda33400e3059eb409f /arch
parent757df746fc5db0020ddab45914617a19d149c252 (diff)
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-ep93xx/core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 1d4b65fd673e..6659a0d137a3 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,
251 unsigned int mcr; 251 unsigned int mcr;
252 252
253 mcr = 0; 253 mcr = 0;
254 if (!(mctrl & TIOCM_RTS)) 254 if (mctrl & TIOCM_RTS)
255 mcr |= 2; 255 mcr |= 2;
256 if (!(mctrl & TIOCM_DTR)) 256 if (mctrl & TIOCM_DTR)
257 mcr |= 1; 257 mcr |= 1;
258 258
259 __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET); 259 __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);