From patchwork Sun Jun 12 15:04:59 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [v2,4/5] ARM: ep93xx: fix inverted RTS/DTR signals on uart1 From: =?utf-8?q?Petr_=C5=A0tetiar?= X-Patchwork-Id: 100105 Message-Id: <1307891100-31123-5-git-send-email-ynezz@true.cz> To: linux-arm-kernel@lists.infradead.org Cc: Hartley Sweeten , =?UTF-8?q?Petr=20=C5=A0tetiar?= , Todd Valentic , Ryan Mallon Date: Sun, 12 Jun 2011 17:04:59 +0200 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 Cc: Hartley Sweeten Signed-off-by: Todd Valentic Tested-by: Roberto Bergo Signed-off-by: Petr Štetiar Acked-by: H Hartley Sweeten --- 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);