diff options
Diffstat (limited to 'drivers/serial/serial_ns16550.c')
| -rw-r--r-- | drivers/serial/serial_ns16550.c | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/drivers/serial/serial_ns16550.c b/drivers/serial/serial_ns16550.c index ba68d46..4413e69 100644 --- a/drivers/serial/serial_ns16550.c +++ b/drivers/serial/serial_ns16550.c @@ -120,6 +120,8 @@ static NS16550_t serial_ports[6] = { static int calc_divisor (NS16550_t port) { + const unsigned int mode_x_div = 16; + #ifdef CONFIG_OMAP1510 /* If can't cleanly clock 115200 set div to 1 */ if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { @@ -128,21 +130,9 @@ static int calc_divisor (NS16550_t port) } port->osc_12m_sel = 0; /* clear if previsouly set */ #endif -#ifdef CONFIG_OMAP1610 - /* If can't cleanly clock 115200 set div to 1 */ - if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { - return (26); /* return 26 for base divisor */ - } -#endif -#define MODE_X_DIV 16 - /* Compute divisor value. Normally, we should simply return: - * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate - * but we need to round that value by adding 0.5. - * Rounding is especially important at high baud rates. - */ - return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / - (MODE_X_DIV * gd->baudrate); + return DIV_ROUND_CLOSEST(CONFIG_SYS_NS16550_CLK, + mode_x_div * gd->baudrate); } void |