diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-05-31 14:07:15 +0400 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-05-31 14:07:15 +0400 |
| commit | e37c83c06c2690157a989df40dc99a6b61c9ea15 (patch) | |
| tree | 024dfb8b2c9abeec9ca7cb0c0136c276d9aacc91 /drivers/serial/imx.c | |
| parent | ce1f7d30766f6549db6fa0b9e595e0d26a5b7d9a (diff) | |
| parent | 67a3e12b05e055c0415c556a315a3d3eb637e29e (diff) | |
| download | linux-e37c83c06c2690157a989df40dc99a6b61c9ea15.tar.xz | |
Merge commit 'v2.6.35-rc1' into for-2.6.36
Diffstat (limited to 'drivers/serial/imx.c')
| -rw-r--r-- | drivers/serial/imx.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index e579d7a1807a..eacb588a9345 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -46,6 +46,7 @@ #include <linux/clk.h> #include <linux/delay.h> #include <linux/rational.h> +#include <linux/slab.h> #include <asm/io.h> #include <asm/irq.h> @@ -119,7 +120,8 @@ #define MX2_UCR3_RXDMUXSEL (1<<2) /* RXD Muxed Input Select, on mx2/mx3 */ #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) */ +#define UCR4_CTSTL_SHF 10 /* CTS trigger level shift */ +#define UCR4_CTSTL_MASK 0x3F /* CTS trigger is 6 bits wide */ #define UCR4_INVR (1<<9) /* Inverted infrared reception */ #define UCR4_ENIRI (1<<8) /* Serial infrared interrupt enable */ #define UCR4_WKEN (1<<7) /* Wake interrupt enable */ @@ -590,6 +592,9 @@ static int imx_setup_ufcr(struct imx_port *sport, unsigned int mode) return 0; } +/* half the RX buffer size */ +#define CTSTL 16 + static int imx_startup(struct uart_port *port) { struct imx_port *sport = (struct imx_port *)port; @@ -606,6 +611,10 @@ static int imx_startup(struct uart_port *port) if (USE_IRDA(sport)) temp |= UCR4_IRSC; + /* set the trigger level for CTS */ + temp &= ~(UCR4_CTSTL_MASK<< UCR4_CTSTL_SHF); + temp |= CTSTL<< UCR4_CTSTL_SHF; + writel(temp & ~UCR4_DREN, sport->port.membase + UCR4); if (USE_IRDA(sport)) { |