diff options
| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2008-07-28 14:10:34 +0400 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2008-09-02 12:19:29 +0400 |
| commit | 4411805b13d4b8c31870b276c2730d585b062db7 (patch) | |
| tree | b6989cdb99ae18042926478c1bb60bced93858a5 /drivers/serial | |
| parent | c45e7d7be891fe94e13d0e7aeee3e0e4ee7118f4 (diff) | |
| download | linux-4411805b13d4b8c31870b276c2730d585b062db7.tar.xz | |
imx serial: set RXD mux bit on i.MX27 and i.MX31
RX in i.MX27 and i.MX31 UART lines does not work unless the
"RXD Muxed Input Select" bit is set on i.MX27 and i.MX31 processors.
This patch sets the missing RXD mux bit in the UCR3 register.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/imx.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index 20189c447e92..312653e2f715 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -127,8 +127,13 @@ #define UCR3_RXDSEN (1<<6) /* Receive status interrupt enable */ #define UCR3_AIRINTEN (1<<5) /* Async IR wake interrupt enable */ #define UCR3_AWAKEN (1<<4) /* Async wake interrupt enable */ -#define UCR3_REF25 (1<<3) /* Ref freq 25 MHz */ -#define UCR3_REF30 (1<<2) /* Ref Freq 30 MHz */ +#ifdef CONFIG_ARCH_IMX +#define UCR3_REF25 (1<<3) /* Ref freq 25 MHz, only on mx1 */ +#define UCR3_REF30 (1<<2) /* Ref Freq 30 MHz, only on mx1 */ +#endif +#if defined CONFIG_ARCH_MX2 || defined CONFIG_ARCH_MX3 +#define UCR3_RXDMUXSEL (1<<2) /* RXD Muxed Input Select, on mx2/mx3 */ +#endif #define UCR3_INVT (1<<1) /* Inverted Infrared transmission */ #define UCR3_BPEN (1<<0) /* Preset registers enable */ #define UCR4_CTSTL_32 (32<<10) /* CTS trigger level (32 chars) */ @@ -598,6 +603,12 @@ static int imx_startup(struct uart_port *port) temp |= (UCR2_RXEN | UCR2_TXEN); writel(temp, sport->port.membase + UCR2); +#if defined CONFIG_ARCH_MX2 || defined CONFIG_ARCH_MX3 + temp = readl(sport->port.membase + UCR3); + temp |= UCR3_RXDMUXSEL; + writel(temp, sport->port.membase + UCR3); +#endif + /* * Enable modem status interrupts */ |