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serial: ns16550: drop CONFIG_OMAP1610 from the special case 

If CONFIG_OMAP1610 is defined, the code returning the fixed value (26)
is enabled. But this case is covered by the following code.

(CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
    (MODE_X_DIV * gd->baudrate)
= (48000000 + (115200 * (16 / 2))) / (16 * 115200)
= 48921600 / 1843200
= 26

The "#ifdef CONFIG_OMAP1610" was added by commit 6f21347d more than
ten years ago. In those days, the divide-and-round was not used.
I guess that is why this weird code was added here.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Rini <trini@ti.com>
Cc: Rishi Bhattacharya <rishi@ti.com>
This commit is contained in:
Masahiro Yamada 2014-07-11 20:29:02 +09:00 committed by Tom Rini
parent 8e8d73b4a5
commit 841977df21
1 changed files with 0 additions and 6 deletions
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6
drivers/serial/serial_ns16550.c
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@ -128,12 +128,6 @@ 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: