diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-13 12:21:44 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-13 12:21:44 -0700 |
| commit | bf6239eb84e6d7331f168cd3593958b656ce42a3 (patch) | |
| tree | 9f123cdc8f4616dadec022fb3c03222feab2a9a9 /drivers/serial/imx.c | |
| parent | 4462dc02842698f173f518c1f5ce79c0fb89395a (diff) | |
| parent | 1c5250d6163dac28be3afabdfb6c723f107051b7 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
serial: imx.c: fix CTS trigger level lower to avoid lost chars
tty: Fix unbalanced BKL handling in error path
serial: mpc52xx_uart: fix null pointer dereference
Diffstat (limited to 'drivers/serial/imx.c')
| -rw-r--r-- | drivers/serial/imx.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index 4315b23590b..eacb588a934 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -120,7 +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 */ @@ -591,6 +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; @@ -607,6 +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)) { |